Loading...
HomeMy WebLinkAboutMt. Village Waste Heat 1992State of Alaska N Walter J. Hickel, Governor Alaska Energy Authority A Public Corporation November 23, 1992 The Honorable Laura Peterson Mayor City of Mountain Village P.O. Box 32085 Mountain Village, Alaska 99632 Subject: Waste Heat Concept Design Report Dear Mayor Peterson: Please find enclosed a copy of the Waste Heat Concept Design Report prepared by the Alaska Energy Authority for your community. This report identifies potential waste heat end-users and provides an estimate of the amount of fuel that would be saved (in both gallons and dollars) for several different combinations of end-users. A cost estimate based on prevailing wage rates and contractor construction is also included for construction of the most feasible waste heat end-user combination. The designs presented herein are schematic in nature and should not be construed as being complete in design or function. A thorough review of content and correctness should be performed prior to use in the development of construction documents. The Energy Authority is currently in the process of reviewing the cost estimates and proposed waste heat end-user combinations to determine if a waste heat project would be economically feasible for your community. If additional information is required, a member of my staff will contact you. If you have any questions or need additional information, please call Brian Gray or Steve Stassel at 800-478-7877 or (907) 561-7877 or FAX (907) 561-8584. David Denig-Chakri Director/Rural Programs SS:DDC:nk Attachment as stated ce: Mark T. Teitzel, AVEC (Without Report) PO. Box 190869 701 East Tudor Road Anchorage, Alaska 99519-0869 (907) 561-7877 Fax: (907) 561-8584 92Q4\NK3923DOC(1) This study was prepared under contract with the Alaska Energy Authority by: Polarconsult Alaska, Inc. 1503 West 33rd Avenue Anchorage, Alaska 99503 The accepted conclusions are: 1. A potential for waste heat recovery has been identified in the community of Mountain Village. rs Based on the proposed design and project cost estimate, the project is not economically feasible and does not appear to justify conventional financing. Alternate funding sources and/or revisions to the project scope will need to be evaluated. 3. | The designs presented herein are schematic in nature and should not be construed as being complete in design or function. A thorough review of content and correctness should be performed prior to use in the development of construction documents. The concept-level project cost estimate for Scenario #6 is $1,002,315. Final review comments and responses which were not incorporated into the report have been included in Appendix A. Accepted: : 2/24/92 Brian C. Gray Date Project Manager Accepted: ott L7 = Date Manager of Rural Projects polarconsult alaska, inc. ENGINEERS ¢ SURVEYORS ¢ ENERGY CONSULTANTS Alaska Energy Authority February 5, 1992 P.O. Box 19086 Anchorage, Ak. 99519-0869 Atm.: Brian Gray Rural Systems Engineer Re: Waste Heat Reports for nine Villages. Dear Brian: We are transmitting this letter as requested in response to your technical questions on the nine waste heat recovery reports prepare for AEA. The questions are from the second Teview of these reports by Steven Stassel of AEA. Copies of the review comments are included with this letter. There were a number of basic assumptions made during the progress of these reports. As the projects are to be constructed in AVEC power plants, the modifications and connections within the plant were to meet with their requirements. We feel that there are a number of ways to decrease the cost of these projects without major impact on the reliability of the power plants by revising the piping connection schematics. Electric demand at the plants varies both hourly and seasonally. As the use of engines is entirely up to the local operator, it is difficult to determine which single engine, or which combination of engines, will be running at any one time. AVEC is also in the process of replacing aging or failed engines, and increasing the size of some plants due to demand as part of their normal maintenance. New engines are mostly Cummins engines that are more efficient. These engines produce less waste heat than the older engines they are replacing. These two factors have a major impact on the amount of waste heat available. Our analysis assumed that the most efficient engine at each plant would run continuously. Station heat requirements were based on having the engine requiring the greatest amount of supplementar\ waste heat to keep the buildings warm, running continuously as shown in the buililing summary sheets in Appendix A. 1503 WEST 33RD AVENUE ® SUITE 310 * ANCHORAGE, ALASKA 99503 PHONE (907) 258-2420 * TELEFAX (907) 258-2419 polarconsult alaska, inc. February 5, 1992 —___District Heat Report Engine manufacturer's specification data is listed in Table III-A. Waste heat utilization simulation work sheets used more detailed heat rejection information at various loads, supplied by the engine manufacturer's. Heat loss figures input into the station heat loss section of the waste heat utilization simulation work sheets were for the engine requiring the most waste heat to keep all the AVEC buildings at 65°F. Heat content of 96,000 BTU for a gallon of heating oil was used for this report. This value was arrived at by using a gross heating value of 132,000 BTU for arctic grade diesel times an estimated efficiency of 73% for boilers. Since the report conclusions are entirely in gallons of oil saved, these assumptions are critical. The BTU content of oil varies depending on the source, blending and grades used, so results can vary plus or minus 5% due to variations in heat content. Further, oil fired equipment efficiencies vary greatly which introduces another plus or minus 5% possible variation in the results. All reports assumed that three trips would be made to each village by a skilled crew each year, to perform routine maintenance. Follows are answers to review comments for each report, as well as copies of the review comments. Sincerely Yours Earle V. Ausman wh9; WHSLO9GB.DOC polarconsult alaska, inc. February 5, 1992 District Heat Report Mountain Village Waste Heat Recovery 4. As the use of engines is entirely up to the local operator, it is difficult to determine which single, or which combination of engines will be running at any one time. It was assumed that the most efficient engine, the Caterpillar D3412 in position 1, which rejects the least amount of heat, would be run continuously. 5.A. Engine manufacturer's specification data is listed in Table III-A. Waste heat utilization simulation work sheets used more detailed heat rejection information at various loads, supplied by the engine manufacturer's. 5.B. Heat loss figures input into the station heat loss section of the waste heat utilization simulation work sheets was for an engine running in a conex. This combination used the most amount of waste heat for station heat. 7. Total fuel usage is correct as shown in Table IV-AA and Appendix A. Values listed in Table IV-A are incorrect. 8. Preliminary analysis has shown that circulation through the heat exchanger & piping system can be accommodated by the existing pumps. If during final design we find that existing pumps are marginal, then larger pumps would be employed. 9. Figure V-1 is correct, Concept 1 is 420' of 2" diameter. Heat losses in the distribution pipeline would double, but the amount of heat displaced would not change as there is three times as much heat available, as is required. Figure V-2 and WHU model Concept 1 should both read, 420' of 2" diameter. 12. The distribution piping in Figure V-1 is 4" diameter as shown. The supply piping in Figure V-4 is 2-1/2" as shown. The piping necks down from 4" to 3" at the tee off the main and down to 2 1/2" at the building. Larger diameter distribution piping is used to keep the pipe head losses down, which in turn keeps the pump sizes and annual operation cost down. 13. The distribution piping in Figure V-1 is 4" diameter as shown. The supply piping in Figure V-5 is 3" as shown. The piping necks down from 4" to 3" at the building. Larger diameter distribution piping is used to keep the pipe head losses down, which in turn keeps the pump sizes and annual operation cost down. 14. The distribution piping in Figure V-1 is 4" diameter as shown. The supply piping in Figures V-7 is 2" as shown. The piping necks down from 4" to 2" at the tee of the main. Larger diameter distribution piping is used to keep the pipe head losses down, which in turn keeps the pump sizes and annual operation cost down. polarconsult alaska, inc. February 5, 1992 District Heat Report 15.A. The old elementary school is a single story frame structure heated by two forced air furnaces, and one boiler. The district heating line will loop through the building with connections to the boiler, and coils in the return ducts of the two forced air furnaces, and back to the power plant. (See Figure V-8.) Piping will tun from furnace room to furnace room under the building in the crawl space. 18. The connection of the old elementary school building to the district heating system includes installation of the piping from the face of the district heating module to the building, and all equipment and connections within the mechanical rooms, as shown in Figure V-8 on page 28. 23.A. Please see questions 4 & 5. 23.B. The 96,000 BTU value for a gallon of heating oil is arrived at by using a gross heating value of 132,000 BTU for arctic grade diesel times an estimated efficiency of 73% for boilers. Since our report conclusions are entirely in gallons of oil saved, these assumptions are critical. The BTU content of oil varies depending on the source, blending and grades used, so results can vary plus or minus 5% due to variations in heat content. Further, oil fired equipment efficiencies vary greatly which introduces another plus or minus 5% possible variation in the results. State of Alaska DN Walter J. Hickel. Governor Alaska Energy Authority A Public Corporation May 23, 1991 Mr. Earle Ausman Polarconsult Alaska, Inc. 1503 West 33rd Avenue Anchorage, Alaska 99503 Subject: Mountain Village Waste Heat Recovery Pre-Final Report Dear Mr. Ausman: We have reviewed the Pre-Final Report and Concept Level Design for the above referenced project and have the following comments. Please provide written responses to all review comments indicating if comment was incorporated or providing an appropriate answer/explanation with the final submittal. i: Executive Summary, paragraph 4, capitalize "C" in Concept. 2s Table of Contents, list of figures - Tables and glossary page numbers don't correspond to actual page numbers. Coordinate. 55 Section IILA., paragraph 1 - "Module #4, 'contains'", change to "consists." 4. Section III.B. - indicate that position #1 D3412 at 1200 rpm is used as the lead generator in the WHU worksheet and indicate basis of assumption. a5 Section III.B: A. Program notes in Appendix A indicate that "engine manutfacture's test data" was used, not the data in Table III-A. Coordinate. B. Section III.C, page 9 - Appendix A worksheets assume position #1 is lead. Coordinate. 6. Section IIL.D, page 10, paragraph 4, change "consist" to "consists." Is Table IV-A & IV-AA, page 13 & 14, the total fuel use for the new elementary, middle and high schools in table IV-A does not agree with table IV-AA or Appendix A, concept 6. Coordinate. 8. Section IV.A.4. are the existing circulations pumps capable of accommodating the head imposed by the heat exchanger and piping? 9! Figure V-1 - "Concept 1, 420 feet of 2" diameter pipe does not agree with Figure V-2 or appendix A, Concept 1 WHU model. Coordinate. OO PO.BoxAM Juneau, Alaska 99811 (907) 465-3575 K PO. Box 190869 704 EastTudor Road Anchorage, Alaska 99519-0869 (907) 561-7877 9102 171) Mr. Earle Ausman May 23, 1991 Page 2 10. Figure V-2, direction of flow arrows are incorrect. 11. Figure V-3, errors in piping arrangement. 12. Figure V-4, equipment schedule indicates 2-1/2" piping. Coordinate with figures V-1 & 2 and appendix A, Concept 6 WHU model. 13. Figure V-5, equipment schedule indicates 3" piping. Coordinate with Figures V-1 & 2 and appendix A, Concept 6 WHU model. 14. Figure V-7, equipment schedule indicates 2" piping. Coordinate with Figures V-1 & 2, and appendix A, Concept 6 WHU model. 15. Section IV.A.4: A. Add a description of the proposed waste heat tie-in to the "old" elementary school with figures. B; Page 16, in "see figures V-5" change "figures" to "figure." 16. Section IV.B.4, change "(see figure IV-6)" to "(see figures IV-6 & V-7.)" 17. Section VI.B.1.b, page 32 - replace "Engine" with "Primary" in first line of paragraph 4. 18. Section VIIL.B. - include description for Concept 1, "Old" Elementary School. 19. Section VIII.D - change paragraph to reflect both concepts 1 & 6. 20. Table VIILA. A. Add to table VIII.A: a subtotal for "Construction Cost" for each building including a line item for "General Conditions." Also, show the "Project Cost" with "Design, SIA", and "Project Contingency" separate from Construction Cost. (Use similar format to HMS Summary Sheet.) Note: the construction cost for a building should be the same for each scenario. The "General Conditions" should include any variance in; freight, per diem, travel, profit, etc. 21. Section IV.A. - change first paragraph to read, "There is approximately 64,755 gallons..." 22. | Add months to X axis on Figure IX-2. 9102\JD0801(2) Mr. Earle Ausman May 23, 1991 Page 3 23. Appendix A: A. Power Plant Heat, according to the WHU worksheets, the D3412 at 1200 rpm is used as the basis of calculations. Please reflect this assumption in appendix A, paragraph 1 and section III, page 9. (see 5b.) B. Clarify where the value of 96,00 BTU/gallons for fuel oil is from. If you have any questions, please call me at 561-7877 or 261-7282. Sincerely, ay 7 ae p ea Ee even Stassel Rural Systems Engineer SS:jd 9102\JD0801(3) State of Alaska Walter J Hickel, Governor Alaska Energy Authority A Public Corporation February 27, 1991 Mr. Earle V. Ausman, P.E. Polarconsult Alaska, Inc. 1503 West 334rd Street, Suite 310 Anchorage, Alaska 99503 Subject: Contract #2800098 Work Order #11, Mountain Village Waste Heat Dear Mr. Ausman: We have received your final invoice (1/31/91) in the amount of $1,610.76 on the work order referenced above. This is to notify you that this work order is being closed out. Any remaining funds that had been set aside for this work order will be disencumbered and made available for future work under the contract. avid Denig-Chakro' Director of Rural Programs DDC:ekn cc: Gary Smith, Alaska Energy Authority — Brian Gray, Alaska Energy Authority ‘Don Whelan, Alaska Energy Authority Dominic Costanzo, Alaska Energy Authority © PO. BoxAM Juneau, Alaska 99811 (907) 465-3575 % PO. Box 190869 701 East Tudor Road Anchorage, Alaska 99519-0869 (907) 561-7877 Alaska Energy Authority A Public Corporation June 12, 1991 Mike Dahl Polarconsult Alaska, Inc. 1503 West 33rd Avenue, Suite 310 Anchorage, Alaska 99503 SUBJECT: District Heating Report and Concept Level Design Studies for Mountain Village, Noatak, Pilot Station, and Scammon Bay. Dear Mr. Dahl: Thank you for taking the time to meet with me and Steve Stassel Wednesday, June 1lth to discuss the above referenced projects. I would like to confirm our understanding of our discussion regarding the preferred method for closing out these projects: 1) PCA was directed by the Energy Authority to use a "canned" approach in the design of the heat recovery systems including the design parameters for the AVEC cooling system (including multiple remote radiators, removal of skid mounted radiators, etc.) and the location of the circulating pumps at the end-user buildings. This contributed to the total cost of the proposed heat recovery systems. 2) PCA is agreeable to incorporating "draft" review comments that were omitted from the “pre-final” reports, as well as any new errors that were inadvertently included in the "pre-final" reports, at no additional cost to the Energy Authority. 3) PCA requires reimbursement for services provided to incorporate any new "pre-final" review comments that were not included in the "draft" review comments. 4) A compromise was reached between PCA and AEA that PCA will respond to the technical related questions in the "pre-final" 3 PO. Box AM Juneau, Alaska 99811 (907) 465-3575 PA PO. Box 190869 701 East Tudor Road Anchorage, Alaska 99519-0869 (907) 561-7877 review comments for the above projects, as well as to any “pre- final" review comments for Nunapitchuk and Tununak, in letter format. In addition, PCA will provide the assumed GPM and head-loss data for all circulating pumps referenced in the Reports. This information will be provided at no additional cost to the Energy Authority. These responses will not be incorporated into the “final" report. In return for fulfilling the requirements of #4 above, PCA will not be required to make any alterations to any of the Reports. In return, AEA will accept the Reports as Final, with the condition that AEA will not be responsible for any typographical errors or technical deficiencies in the reports. Please find enclosed a copy of the acceptance notice to be included with each copy of the reports. If you have any questions, please call me or Steven Stassel at 561- 7877. Sincerely, Pov Lo Brian Gray Project Manager Ss/ enclosure cc: Steve Stassel, Alaska Energy Authority This study was prepared under contract with the Alaska Energy Authority by: Polarconsult Alaska, Inc. 1503 West 33rd Avenue Anchorage, Alaska 99503 The accepted conclusions are: 1. A potential for waste heat recovery has been identified in the community of Mountain Village. 2. Based on the proposed design and project cost estimate, the project is not economically feasible and does not appear to justify conventional financing. Alternate funding sources and/or revisions to the project scope will need to be evaluated. 3. The designs presented herein are schematic in nature and should not be construed as being complete in design or function. A thorough review of content and correctness should be performed prior to use in the development of construction documents. The concept-level project cost estimate for Scenario #6 is $1,002,315. Accepted: Brian C. Gray Date Project Manager Accepted: Gary D. Smith Date Manager of Rural Projects ' Date: Mos From: Re: MEMORANDUM 10/19/90 Earle Ausman Polarconsult Alaska, Inc. Brian Gray Rural Systems Engineer Alaska Energy Authority Mt. Village Waste Heat Recovery Draft Report We have reviewed the Draft Report and Concept Level Design for the above referenced project and have the following comments. Please provide written responses to all review comments indicating if comment was incorporated or providing an appropriate answer/explanation with the pre-final submittal. OICn. Executive Summary page 1, paragraph 1 - Mt. Village is not located in northwest Alaska but rather western Alaska. Executive Summary page 1, paragraph 3 - Provide an explanation of the concepts investigated either here or Tie Executive Summary page 1, paragraph 4 - Revise to say "Project cost ... for Concept #6 are as follows". Executive Summary page 2, paragraph 5 - See comment #1. Table of Contents - Capitalize "Heating" on VIII-B. List of Tables - Delete the word "usage" in IV-A. Section I-D - See comment #1. Section I-E, paragraph 2 - Correct spelling of "community’s". Section III-A, paragraph 1 - Is there a position #2 that is currently unoccupied? If so, should arrangements be made in the new piping to accommodate a future unit? ws 10. Section III-A, Table III-A: 4} A. The generators listed in this table do not agree with those listed in Field Notes item 13. Coordinate. Is generator #4 actually the same model as generator #1 only running at a higher RPM? Confirm the data shown in Table III-A. ne Ce. A statement should be added to Section III-A indicating which generator is the lead unit. Section III-B - The Program Notes in Appendix A indicate that the engine manufacturer’s test data was used not the engine specs listed in Table III-A. Coordinate. Section III-C, paragraph 1 - Does each of the radiators connected to units 1 & 3 have sufficient capacity to reject all of the heat produced by either engine? If so, add a statement similar to the one for units 4 & 5. Section III-C, paragraph 3 - A statement should be added which clearly identifies which combination of heat loss figures was used in the waste heat utilization simulation worksheets. Section III-D, paragraph 1 - Will one of the remote radiators be adequate to meet the heat rejection requirements of any one of the four generators? Section III-D, fourth paragraph on page 10 - Add "for the new heat exchanger module" after "district heating electrical systems." Section IV-A - Is the old elementary (BIA) school still used as an elementary school or has its function changed? Clarify. Section IV-A-3 - Revise "1999" to "1989." Table IV-A: oir Ae The total annual fuel oil consumption for the old elementary school of 20,832 gallons does not agree with the figure in Table IV-AA. Coordinate. J. The total annual fuel oil consumption for the high school of 102,255 gallons does not agree with the figures in Table IV-AA or any combination of buildings listed in the Waste Heat Utilization Simulation Worksheets. Indicate which buildings this figure applies to and coordinate with Table IV-AA. 19. Section IV-A-4: > Coordinate the grades of students attending the new elementary school with the information listed in Section IV-A-1. for domestic water heating should be provided. We question the economic feasibility of providing a second heat exchanger for domestic hot water. This comment applies to all three school buildings. v B. An estimate of the quantity of fuel oil consumed wl yak 20. Section IV-A-4 <Adaress whether the existing new elementary and middle school heating system circulating pumps are likely to be able to accommodate the additional head imposed by the heat exchanger. 21. Section IV-A-4, paragraph 3: A. A heat exchanger and secondary pump are neither O- required or desired for the high school system. The heating coil provides essentially the same separation on a forced-air system that a heat exchanger provides on a hydronic system. Also, iy cloniey that the coils will be located in the return air duct. B. How is the swimming pool heated? Was any wy provision for providing waste heat to the pool considered? oe Section IV-B-3 - The statement that during the summer () no heat was assumed necessary does not agree with the sample calculation in Appendix A or the figures in Table IV-B. Coordinate. 23. Figure V-1: pia. Provide a north arrow. ov: Identify the line shown running from the river to the high school. The linetype is not indicated in the legend. 24. Cs Is the building labeled "Head Start" the same facility referred to as the preschool in the calculations? Use consistent names. e. Label the buildings at the AVEC Site. Figure V-2: CAL. Delete the heat exchanger at the high school unless it is intended for pool heating. es. Indicate where the various pipe sizes occur. iy 25. 26. Figure V-3 - The flow patterns should be checked thoroughly as it appears there may be some errors in the piping arrangement. Figure V-4, V-5, V-6, & V-7 - Correct the spelling of Grundfos" and indicate the estimated-GPM, head, and motor horsepower for the pumps. ANS Figure V-5 - Delete the heat exchanger at the high school unless it is intended for pool heating. Figure V-7 - Move the space for user equipment further away from the wall to avoid conflicts with the electrical gear service clearances. Section VI-B-1-b-5 - Add "primary" prior to "heat exchanger" and add "pumps," after "piping,". Also, replace "Engine" with "Primary" in the first line of the fifth paragraph on page 31. Section VIII-D - Is insulation of the floors included in cost estimate for modifications of the existing power plant? Table VIII-A - It appears that Concepts 6 & 1 are presented, not Concepts 1 & 2 as indicated. Revise as required. Section X - See comment #1. Appendix A, Page 1, Power Plant Heat - There is no indication on the Building Heating Summaries that an additional 2 ACPH has been added. Also, if the Caterpillar D3412 in position 4 is running at 1,800 RPM as indicated in Table III-A and is the lead unit the infiltration rate should be in excess of 37 ACPH. Revise as required. Appendix A, Page 1, User’s Monthly Fuel Usage - Provide an explanation in this section for the constant 250 gallon monthly fuel consumption. See comment #22. OL. 365 Appendix A, Program Notes - The reference here should be to Table III-A, not Table III-B. Appendix A, Waste Heat Utilization Simulation Worksheets - The following comments apply to the worksheets for all concepts: Mal Confirm that the generator being used for heat availability data is indeed the intended lead unit. See comment #10. Bi Revise units under generator data to "(BTU/HR) /(KW)" not KWH as indicated. pas Hourly heat demand variation appears to be incorrect. Heat demand should decrease during the daytime due to higher outside air temperatures and increased internal heat gains. We have attached an example heat demand variation that you may wish to use. Revise calculations as required. D. Page 3 indicates that the user building hydronic systems utilize water, not glycol. Is this true for all buildings? ai Variable Losses for plant heating will probably have to be revised to account for the higher air change rate in the lead generator module. See comments 33 & 38. a Under Building Data the fuel use for the piping loss should only appear for the particular building(s) being analyzed under that concept. OILS: Where is worksheet for Concept #5? Jy37- Ke p|es. Appendix A, Building Heating Summary Calculations - Qualify where the value of 96,000 BTU/Gal for fuel oil comes from. Note that this comment applies to both versions of the calculations. Appendix A, Building Heating Summary Calculations - If the Caterpillar D3412 in position 4 is running at 1,800 RPM as indicated in Table III-A the combustion air should be 1,470 CFM not 1,020 CFM as indicated. Revise as required. Note that this comment applies to both versions of the calculations. Provide color photographs in the final report. MTVLBGMI NOORVIK WASTE HEAT RECOVERY ESTIMATION PAGE 1 CONCEPT 3 WASTE HEAT UTILIZATION SIMULATION WORK SHEET. Location: NOORVIK Date: December 14, 1989 Heat rate: 2406 Btu/kwh produced System loss: 54,666 Btu/hour (approx. 38 BTU/FT arctic pipe) Total generation: 1,882,466 kwh/year ANNUAL, Local degree days: 1784 1846 2689 1418 944 663 263 356 811 «1654 1787 2894 15,849 Assumed diurnal heat Power plant monthly generation: demand variation: aeo--------------- JAN FEB OMAR) APR) MAY, JUN JUL AUG SEP OCT NOV = DEC CHECKSUM Fraction:6.6815 6.8916 6.6923 6.6883 6.6865 6.8646 6.6646 6.6728 6.6658 6.0946 6.8983 6.1664 f Kwh: 88666 99266 166666 95666 87286 76666 76666 78666 76466 162466 166466 115266 1,282,400 Diurnal variation 6.638 6.638 6.658 6.858 6.645 6.645 6.645 6.645 6.645 6.645 6.638 6.838 6.636 6.656 6.656 6.656 6.046 6.848 6.646 6.646 6.646 6.846 6.636 6.636 6.634 6.634 6.634 6.654 6.636 6.836 6.636 6.656 6.636 6.836 6.634 6.034 6.634 6.634 6.634 6.634 6.835 6.635 6.655 6.655 6.635 6.635 6.634 6.034 6.653 6.633 6.633 6.633 6.655 6.655 6.8635 6.635 6.835 6.635 6.633 8.233 6.654 6.654 6.634 6.634 6.638 6.658 6.638 6.638 6.638 6.838 6.834 6.034 6.658 6.658 6.658 6.638 6.858 6.658 6.658 6.638 6.838 6.838 6.838 6.838 6.642 6.642 6.642 6.642 6.646 6.646 6.646 6.646 6.646 6.646 6.842 6.842 Y 6.642 6.642 6.642 6.642 6.645 6.645 6.645 6.645 6.645 6.645 6.842 6.042 i 6.647 6.647 6.647 6.647 6.647 6.647 6.647 6.647 6.847 6.647 6.647 8.847 ( 6.648 6.648 6.648 6.648 6.646 6.046 6.646 6.646 6.646 6.646 6.648 6.048 ’ 6.647 6.647 6.647 6.647 6.848 6.648 6.648 6.648 6.648 6.648 6.647 6.247 6.645 6.645 6.645 6.645 6.856 6.656 6.856 6.058 6.656 6.658 6.845 6.045 6.647 6.647 6.647 6.647 6.852 6.652 6.052 6.652 6.052 6.652 6.647 6.847 } 6.648 6.648 6.648 6.648 6.656 6.256 6.656 6.056 6.656 6.656 6.848 6.048 { 6.648 6.648 6.648 6.648 6.856 6.656 6.856 6.056 6.656 6.056 6.648 6.048 { 6.649 6.849 6.649 6.649 6.645 6.645 6.645 6.645 6.645 6.645 6.649 6.049 NY 6.646 6.646 6.646 6.646 6.647 6.647 6.647 6.647 6.647 6.647 8.846 6.846 j 6.645 6.845 6.645 6.645 6.656 6.656 6.056 8.656 6.656 6.656 6.8643 6.643 6.658 6.658 6.658 6.658 6.645 6.845 6.645 6.645 6.645 6.645 6.638 6.638 6.638 6.638 6.658 6.658 6.641 6.641 6.641 6.641 6.641 6.641 6.638 6.638 6.641 6.641 6.641 6.641 6.841 6.641 6.641 6.641 6.841 6.641 6.641 6.641 6.645 6.645 6.645 6.645 6.641 6.641 6.641 6.641 6.641 6.641 6.645 6.645 6.646 6.646 6.646 6.646 6.643 6.643 6.643 6.643 6.643 6.643 6.648 6.048 Building use per month, gallons of fuel oil BUILDING 1, HIGH SCHOOL 3918 2431 1288) -2628 «1739 6 ‘ 6 2858 3125 «3563 4846 = 25, S08 BUILDING 2, COMMUNITY BUILDING 9659341857) 718 478 385 13S 188418533 84 1868 7,615 BUILDING 3, TREATMENT BUILDING 1719 1779 ZHI. 1366918 58153 4S 7811816172218 14,581 BUILDING 4 6 6 6 6 6 6 6 6 6 6 6 6 a BUILDING 5 6 6 6 6 6 6 6 6 6 6 6 6 ' 6 BUILDING 6 6 6 6 6 6 6 8 e 6 6 6 6 é State of Alaska TS Steve Cowper Governor Alaska Energy Authority A Public Corporation TELECOPY (ANCHORAGE Telecopy Phone No. (907) 561-8584) (JUNEAU Telecopy Phone No. (907) 465-3767) TELECOPY SENT TO: Vor NAME OF COMPANY: Ce lear cone I+ Alec kia l We COMPANY ADDRESS: A wcll. TELECOPY PHONE NUMBER: 2see- 2] 10 SENDER: _Yecjeu Corey TELEPHONE NUMBER: aaah 34 CHARGE CODE: NUMBER OF PAGES SENT: Z INCLUDING THIS COVER PAGE DATE SENT: lof is />=— IF YOU DO NOT RECEIVE ALL OFTHIS TELECOPY PLEASE CALL: €907) 261-7240-Anchorage (907) 465-3575-Juneau SPECIAL INSTRUCTIONS: w+ sda en —_. LAF <. EH ma t = PO. BOX AM Juneau. Alaska 99811 (907) 465-3575 Ga PO. Box 190869 707 East Tucier Road) = Anchorage, Alaska 99619-0869 (907) 561-7877 TRANSMISSION REPORT THIS DOCUMENT (REDUCED SAMPLE ABOVE) WAS SENT *k COUNT *& # 7 KK SEND kK I | No REMOTE STATION I. 0D. START TIME DURATION #PAGES COMMENT | 1 9072582419 10-19-90 13:26 | 4°45" 7 L TOTAL 0:04'45" i XEROX TELECOPIER 7020 State of Alaska DN Steve Cowper, Governor Alaska Energy Authority A Public Corporation Te EE Gao; Pry. (ANCHORAGE Telecopy Phone No. (907) 561-8584) (JUNEAU Telecopy Phone No. (907) 465-3767) TELECOPY SENT TO: Lac Avera. NAME OF COMPANY: ‘to | es | as Ne, COMPANY ADDRESS: eels TELECOPY PHONE NUMBER: _ZO>®8- 24)9 SENDER: cian Ca TELEPHONE NUMBER: ZoleWZ9 4 CHARGE CODE: NUMBER OF PAGES SENT: / INCLUDING THIS COVER PAGE DATE SENT: lol! ls0 IF YOU DO NOT RECEIVE ALL OF THIS TELECOPY PLEASE CALL: (907) 261-7240-Anchorage (907) 465-3575-Juneau SPECIAL INSTRUCTIONS: ila a e Legs jeu) Comme PO. Box AM Juneau, Alaska 99811 (907) 465-3575 x PO. Box 190869 701 East TudorRoad Anchorage, Alaska 99519-0869 (907) 561-7877 Date: To: From: Re: MEMORANDUM 10/19/90 Earle Ausman Polarconsult Alaska, Inc. Brian Gray Rural Systems Engineer Alaska Energy Authority Mt. Village Waste Heat Recovery Draft Report We have reviewed the Draft Report and Concept Level Design for the above referenced project and have the following comments. Please provide written responses to all review comments indicating if comment was incorporated or providing an appropriate answer/explanation with the pre-final submittal. 1. Executive Summary page 1, paragraph 1 - Mt. Village is not located in northwest Alaska but rather western Alaska. Executive Summary page 1, paragraph 3 - Provide an explanation of the concepts investigated either here or in the introduction. Executive Summary page 1, paragraph 4 - Revise to say "Project cost ... for Concept #6 are as follows". Executive Summary page 2, paragraph 5 - See comment #1. Table of Contents - Capitalize "Heating" on VIII-B. List of Tables - Delete the word "usage" in IV-A. Section I-D - See comment #1. Section I-E, paragraph 2 - Correct spelling of "community’ s", Section III-A, paragraph 1 - Is there a position #2 that is currently unoccupied? If so, should arrangements be made in the new piping to accommodate a future unit? 10. 11. 12. 13. 14. Ls: 16. 17. 18. Section III-A, Table III-A: A. The generators listed in this table do not agree with those listed in Field Notes item 13. Coordinate. B. Is generator #4 actually the same model as generator #1 only running at a higher RPM? Confirm the data shown in Table III-A. Cs A statement should be added to Section III-A indicating which generator is the lead unit. Section III-B - The Program Notes in Appendix A indicate that the engine manufacturer’s test data was used not the engine specs listed in Table III-A. Coordinate. Section III-C, paragraph 1 - Does each of the radiators connected to units 1 & 3 have sufficient capacity to reject all of the heat produced by either engine? If so, add a statement similar to the one for units 4 & 5. Section III-C, paragraph 3 - A statement should be added which clearly identifies which combination of heat loss figures was used in the waste heat utilization simulation worksheets. Section III-D, paragraph 1 - Will one of the remote radiators be adequate to meet the heat rejection requirements of any one of the four generators? Section III-D, fourth paragraph on page 10 - Add "for the new heat exchanger module" after "district heating electrical systems." Section IV-A - Is the old elementary (BIA) school still used as an elementary school or has its function changed? Clarify. Section IV-A-3 - Revise "1999" to "1989." Table IV-A: A. The total annual fuel oil consumption for the old elementary school of 20,832 gallons does not agree with the figure in Table IV-AA. Coordinate. 19. 20. 21. 22. 23. B. The total annual fuel oil consumption for the high school of 102,255 gallons does not agree with the figures in Table IV-AA or any combination of buildings listed in the Waste Heat Utilization Simulation Worksheets. Indicate which buildings this figure applies to and coordinate with Table IV-AA. Section IV-A-4: A. Coordinate the grades of students attending the new elementary school with the information listed in Section IV-A-1. B. An estimate of the quantity of fuel oil consumed for domestic water heating should be provided. We question the economic feasibility of providing a second heat exchanger for domestic hot water. This comment applies to all three school buildings. Section IV-A-4 - Address whether the existing new elementary and middle school heating system circulating pumps are likely to be able to accommodate the additional head imposed by the heat exchanger. Section IV-A-4, paragraph 3: A. A heat exchanger and secondary pump are neither required or desired for the high school system. The heating coil provides essentially the same separation on a forced-air system that a heat exchanger provides on a hydronic system. Also, clarify that the coils will be located in the return air duct. B. How is the swimming pool heated? Was any provision for providing waste heat to the pool considered? Section IV-B-3 - The statement that during the summer no heat was assumed necessary does not agree with the sample calculation in Appendix A or the figures in Table IV-B. Coordinate. Figure V-1: A. Provide a north arrow. B. Identify the line shown running from the river to the high school. The linetype is not indicated in the legend. 24. 25. 26. 21s 28. 29. 30. Sil 32. 335 34. Ce Is the building labeled "Head Start" the same facility referred to as the preschool in the calculations? Use consistent names. Ds Label the buildings at the AVEC Site. Figure V-2: Ae Delete the heat exchanger at the high school unless it is intended for pool heating. B. Indicate where the various pipe sizes occur. Figure V-3 - The flow patterns should be checked thoroughly as it appears there may be some errors in the piping arrangement. Figure V-4, V-5, V-6, & V-7 - Correct the spelling of "Grundfos" and indicate the estimated GPM, head, and motor horsepower for the pumps. Figure V-5 - Delete the heat exchanger at the high school unless it is intended for pool heating. Figure V-7 - Move the space for user equipment further away from the wall to avoid conflicts with the electrical gear service clearances. Section VI-B-1-b-5 - Add "primary" prior to "heat exchanger" and add "pumps," after "piping,". Also, replace "Engine" with "Primary" in the first line of the fifth paragraph on page 31. Section VIII-D - Is insulation of the floors included in cost estimate for modifications of the existing power plant? Table VIII-A - It appears that Concepts 6 & 1 are presented, not Concepts 1 & 2 as indicated. Revise as required. Section X - See comment #1. Appendix A, Page 1, Power Plant Heat - There is no indication on the Building Heating Summaries that an additional 2 ACPH has been added. Also, if the Caterpillar D3412 in position 4 is running at 1,800 RPM as indicated in Table III-A and is the lead unit the infiltration rate should be in excess of 37 ACPH. Revise as required. Appendix A, Page 1, User’s Monthly Fuel Usage - Provide an explanation in this section for the constant 250 gallon monthly fuel consumption. See comment #22. 35. Appendix A, Program Notes - The reference here should be to Table III-A, not Table III-B. 36. Appendix A, Waste Heat Utilization Simulation Worksheets - The following comments apply to the worksheets for all concepts: A. Confirm that the generator being used for heat availability data is indeed the intended lead unit. See comment #10. Be Revise units under generator data to " (BTU/HR) /(KW)" not KWH as indicated. c. Hourly heat demand variation appears to be incorrect. Heat demand should decrease during the daytime due to higher outside air temperatures and increased internal heat gains. We have attached an example heat demand variation that you may wish to use. Revise calculations as required. D. Page 3 indicates that the user building hydronic systems utilize water, not glycol. Is this true for all buildings? Es The Variable Losses for plant heating will probably have to be revised to account for the higher air change rate in the lead generator module. See comments 33 & 38. F Under Building Data the fuel use for the piping loss should only appear for the particular building(s) being analyzed under that concept. G. Where is worksheet for Concept #5? 37. Appendix A, Building Heating Summary Calculations - Qualify where the value of 96,000 BTU/Gal for fuel oil comes from. Note that this comment applies to both versions of the calculations. 38. Appendix A, Building Heating Summary Calculations - If the Caterpillar D3412 in position 4 is running at 1,800 RPM as indicated in Table III-A the combustion air should be 1,470 CFM not 1,020 CFM as indicated. Revise as required. Note that this comment applies to both versions of the calculations. 39. Provide color photographs in the final report. MTVLBGMI1 NOORVIK WASTE HEAT RECOVERY ESTIMATION PAGE 1 CONGET 3 WASTE HEAT UTILIZATION SIMULATION WORK SHEET. Location: NOORVIK Date: December 14, 1989 Heat rate: 2488 Btu/kwh produced System loss: 54,088 Btu/hour (approx. 38 BTU/FT arctic pipe) Total generation: 1,082,488 kwh/year ANNUAL Local degree days: 1784 1846 2889 1418 944 603 263 356 «811-1854 «1787 2894 15,049 Assumed diurnal heat Power plant monthly generation: demand variation: a----------------- JAN FEB MAR APR «OMAY = JUN) JUL ss AUG—s SEP) «OCT.-— “NOV. — «DEC. CHECKSUM Fraction:8.6813 6.8916 6.6923 6.8683 6.6885 6.0646 8.8646 8.8728 8.8658 8.0946 8.8983 8.1064 1 Kwh: 88886 99268 188886 95608 87288 78666 70068 78666 78406 162408 106408 115288 1,082,400 Diurnal variation 6.638 6.658 6.838 6.838 8.045 8.045 6.845 0.045 6.045 8.045 8.038 98.038 8.836 6.836 6.636 6.036 6.048 6.040 6.048 6.046 6.646 6.048 6.036 0.836 6.634 6.654 6.634 6.034 6.636 8.036 6.036 6.836 8.836 8.036 8.034 8.934 6.034 6.654 6.834 6.034 6.035 8.035 6.035 6.835 6.635 8.835 8.034 8.034 6.633 8.653 6.633 6.833 6.635 6.035 6.835 6.835 8.835 8.835 8.033 8.933 6.654 6.854 6.034 6.034 6.038 6.038 6.638 6.838 8.838 8.038 8.034 8.034 8.638 6.658 6.838 6.838 6.038 6.838 6.638 6.638 6.838 6.038 6.038 8.838 6.642 6.642 6.042 6.042 6.048 8.040 6.046 6.048 8.046 8.048 8.042 8.042 6.642 6.842 6.642 6.642 8.645 6.845 6.045 6.845 6.845 08.045 8.042 0.042 6.647 6.647 6.647 6.847 6.847 6.047 6.047 6.647 6.847 6.047 6.047 8.047 6.048 6.048 6.048 6.048 06.040 6.046 6.046 6.046 6.048 6.046 6.048 0.048 6.647 6.8647 6.047 6.647 6.048 6.048 6.048 6.048 6.648 6.048 8.047 0.047 6.045 6.645 6.045 6.845 6.058 6.056 6.058 6.058 8.058 6.058 6.045 8.045 6.647 6.8647 6.847 6.647 6.852 6.852 6.652 6.652 6.852 6.852 8.047 6.047 6.648 6.648 6.648 6.848 6.058 8.858 6.058 6.658 8.058 6.858 8.848 0.048 6.848 6.048 6.048 6.048 6.058 6.058 6.058 6.058 8.658 8.058 6.048 0.048 6.649 6.849 6.649 6.649 6.045 6.045 6.845 6.645 6.845 6.045 6.049 8.049 6.846 6.046 6.846 6.646 6.647 6.647 6.847 6.647 6.047 6.047 6.646 6.046 6.845 6.643 6.643 6.645 6.656 6.056 6.056 6.056 6.656 8.858 6.643 0.43 6.658 6.658 6.638 6.038 6.045 6.845 6.645 6.645 6.645 6.045 8.038 6.038 6.638 6.638 6.638 6.658 6.641 6.641 6.641 6.641 6.041 6.641 6.638 8.838 6.641 6.041 6.641 6.641 6.641 6.041 6.841 6.841 6.841 6.641 6.641 6.041 6.045 6.045 6.045 6.845 6.641 6.641 6.641 6.641 6.041 6.041 6.645 6.845 6.6468 6.646 6.048 6.048 6.043 6.643 6.043 6.643 6.043 0.043 0.040 0.040 Building use per month, gallons of fuel oil BUILDING 1, HIGH SCHOOL 3918 = 24311288 = 2628 )=—:1739 6 8 6 2858 3125 3563 4846 25,588 BUILDING 2, COMMUNITY BUILDING 9639341857718 478385 133 186 418533 964 «1868 7,615 BUILDING 3, TREATMENT BUILDING 1719 1779-2813 1366 918 581 23 343 781 «1816 =1722— 2818 14,581 BUILDING 4 6 6 6 6 6 6 6 6 6 6 8 8 8 BUILDING 5 6 6 6 6 6 6 6 6 6 6 6 8 a BUILDING 6 6 6 6 6 6 6 6 8 6 6 8 8 8 polarconsult alaska, inc. LETTER _F TRANSMITTAL 1503 West 33rd Avenue e Suite 310 ANCHORAGE, ALASKA 99503 (907) 258-2420 FAX (907) 258-2419 “ DATE JOB NO. RECEIVED 6 -Z\-4Fo ATTENTION ile Viuages Deruct aoa ALASKA ENERGY AUTHORITY WE ARE SENDING YOU \{ attaches (J Under separate cover via______________the following items: CJ Shop drawings 0 Prints C) Plans O Samples 0 Specifications C) Copy of letter (0 Change order O mm Sori! DATE fe NO. DESCRIPTION | ‘Dpearr cepees “HT. viene District Heat Repoes % ConcerpT leve. Descn THESE ARE TRANSMITTED as checked below: CO For approval {) Approved as submitted CJ Resubmit copies for approval (J For your use (0 Approved as noted O Submit copies for distribution CO As requested (J Returned for corrections C1 Return ______corrected prints hor review and comment [] CE FORBIDS DUEL eee ( PRINTS RETURNED AFTER LOAN TO US REMARKS COPY TO) Tete NI poe SIGNED: If enclosures are not as noted, kindly notify us at once. Bae oa°@ 27 "Lact BET29V-OT BE / T2/9B at Le eae4r BE "VdHT QETQS-VIHO/M BE/12/Sd ar 99°Eal2 +t aa9L QTHOM-BEEVED UE/6B/E2 ar Bd “HECaT © GR/TI/2T Bd"/Rcat ar aaa pare L6°TRET VETZ9IA-6 = @G/T2/9B 6 26 °TaCt 68 °2e9T BETBSI-640/M B6/13/S2 6 99 "6862 #1 °s9ad EROM-QEERER B6/62/EB 6 wa"ssrat 6B/TI/2T Ba"Sssat 6 22's 2a°O 9S "998T V-26E02VWd 26/E0/20 YINIGN3d *8 85 “OB8T £8 °90S Q66260-8 26/92/68 9 Ty "S62 29°1984 VETASA-BHO/M BE/T2/SO g 92 °SS2Z 22 °6L62 BHOM-VEEBED YE/62/E9 g av "seeat 6B/TI/2T aasezat g aaa 22°O 82 °SBS2 QBETZ9IB-2 BE /TT/2T zZ 99 °Ses2 Q2°9EL4 QE TASB-Z2#O/M QE/TA/SA i B2°TH2L 2L°6LOE LHOM-BE6BEX 26/60/80 Z wactzeat 69/1/21 aa tzeat Z Dan vara 22 °R69 a3S079 O/M $T6/2a/90 9 LL°969 fe "FRET uNMONYNN, @6/S2/90 9 ar Tanz WE “BIGLT T-O61270 6/12/20 3 va “aaaaz 69/TT/2T ve-weaaear 9 waa aa"D S6°ETS q3S079 O/M =T6/La/EN ¢ S6°E1S sea a9a2 S-69TI9@ = B/TI/98N : wa "ag? 69/12/89 aa‘BAgs S aaa ave Ba "VAZg settee 68/1/62 + aa "aaz9 68/20/29 Ba-ayz9g 6 wae wae Ba "s9Ts E-BEONVG? DE/LI/TO < wd "R9T9 68/28/"d DI“E9ITB . wae Bas va wares *NMONYND = 68/41/90 2 ad" bazE7 BB/BE/TT Ba-eazcz 2 aaa ave ea "e228 *NMONHN = -68/9T/Ea T av "e278 6RB/BT/EB wa-asze t aaa A31139N0I «68/51/20 Ba asze- T Bd "Y220 BB/ST/EN wa-azzR T JONH THA # O/M aibe # 32D10ANI 3100 SVD TT HAY # 07M om BONN JNNOWS Sann4 3Lvd 1X3 9 Bna-agas Gay OL T# GN3WYH -— “VRMAVers HETONSRUGHSASH ANIDITISLA-TLIAW C44 WYN JO LYONS HYONZ 4ONd GANOISSH O/Mm BEwaAaIe# NF “ONT “WHSYTY LINSNODYNYI09 A) n 9354-92 9648. @@ 12/11/89 9646. aa Q3/NI/IA AINIIN-WO#11 3596. 84 6251.16 @5/21/9@ W/O#11-Se@1gea 596Q. 57 2278.59 Q9/26/94 11-W621 FAREV 659. 63 1610. 76 @1/31/91 W/O 11/JANS1 1618.76 a. au @. ad Ve 9766.88 12/11/69 9766. U2 12 Q3/O9/FIA AZVIGVA-WOH LES 3596. 84 6169.16 le QS5/21/358 W/G#12-SU1sa 35678. 48 2516.76 12 @35/26/9G 12-A621 9UREV 967.83 1558. 93 lee FENDING Q4/82/91 POLU48251 155a. 93 Q. ar 2. ww 13 9888.@@ 12/11/69 9868. au 13 Q3/AI/BA ASWIGA-WO#H1S 3546. 64 6341.16 13 @S/@1/94 W/O#13-Se19a 3673.34 2667. 86 13 29/26/92 13-A7NGSAREV 1017.83 1652. a3 13* PENDING @3/26/91 FOL@S2691 165@. a3 @. au 2. aa 14 9612.88 12/11/89 9612. aa 14 @3/A9/IA-14-VSa9GA 3596. 84 6215.16 14 QS/21/S92 W/0#14-S2198 3665. 64 2549. 32 14 @9/2Z6/92@ 14-@7A69OREV 967.16 1562. 16 14* PENDING @3/A3/92 POLW2AS92—-h 1582. 16 2. 22 a. aa 15 9429.@@ 12/11/89 9429. aa 15 Q3/8S/92 A3SAIIA-WOH1IS 1533.67 7895. 33 1S QS/A1/9IA W/GH1S-SA19e8 4655. 92 3239.41 1S Q9/26/98 15-7 2S5NREV 1634. 63 1404.58 1S« PENDING W2/AS/F2 FPOL@*ZASIZ—-C 1404.58 Q. Ae @. Bei 15635@. a2 TOTALS TO DATE 156352. wa 2. a2 Qua *ALL INVOICES RECEIVED IN ACCOUNTING FER S, 19 wo fh polarconsult alaska, inc. ENGINEERS « SURVEYORS ¢ ENERGY CONSULTANTS R EC EF | VED Alaska Energy Authority FEB 04 4991 January 31, 1991 P.O. Box 190869 Alaska Energy Authority Anchorage, Alaska 99519 Re: Contract AEA 2800098, Work Order 11, Mt. Village Waste Heat. gle! Dear Mr. Brian Gray: >? 6 Thank you for your letter of September 27, 1990. Please find enclosed a new invoice for the work completed to date on Mt. Village in replacement of the June 21, 1990 invoice as you requested. Invoice # Labor Expenses Total 04/90 Invoice $2,906.67 $690.17 $3,596.84 05/90 Invoice $3,973.00 $7.57 $3,980.57 09/90 Invoice $659.83 $0 $659.83 Total Due This Invoice $1,330.50 _ _$280.26 __—_—'$1,610.76 Expended to Date $8,870.00 $978.00 $9,848.00 Contract $8,870.00 $978.00 $9,848.00 Remaining $0.00 $0.00 $0.00 Labor hours on the project were as follows: Personnel Ausman Moore Dahl Rate $72 $72 $56 04/90 Invoice 11 10 27 05/90 Invoice 27 2 33 09/90 Invoice 24 2 15 This Invoice 24 0 24 Sincerely Yours b husgron HD "5 BEL, 6.40 Earle V. Ausman al . 730 Se OF193 oo / ENCL .*- PANTING Er PENSES 1503 WEST 33RD AVENUE e SUITE 310 e ANCHORAGE, ALASKA 99503 rN = PHONE (907) 258-2420 e TELEFAX (907) 258-2419 i