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HomeMy WebLinkAboutMcgrath Design Notes & Drawings 1988 Crerk Pee cee ——4 ' rin a 1 \ st =3- —-+-—- es rf. Me aw 7 _ 29Gr-9P es IAB NZ TY He wd tae Be? Ere. ene THE CITY OF MGRATH VILLAGE SAFEWATER PROGRAM WATER IMPROVEMENTS ALASKA DEPARTMENT OF ENVIRONMENTAL CONS RATION ALASKA ENVIRONMENTAL 1220 wes! 22m Avence Anchor age, iaphe #¥SO3 TRIAD ENGINEERING PLANNING B SURVEYING 937 Oi Severs Mey Ancnarege, duwebe 99502 CONTROL SERVICES, INC 2 ver teres LTA. beter ar ce se £1426 REVISED!) P12 -O4 Niles AUiaNMEN] £TA 8904s 10 STA wisi! PURULENT mae ome me te Aton dots b2oF ae ets aor im In i) CnbcK vouve nns Genk va-ve ann THROTTONG Wheevd ome ZONE vane cna 4 AQuLs~a7 a a2 $ TEMPENE URE GouEe Fy 2 Peess_At Swoon Tw ‘> ~~ Foon reTha bea an , Plow eT eR (TUTA. BEA) pressova TEBE alk 189 ) SXENGID CONTRO Where PRESSURE REQUCNG vacve 5 most Bb AOS CR eBT VG MUTE xO FB LGLASTET NOL COONTAILS (ALB NG UTP NO. 4 ADASTET AI.J SowTRAS FONE verve WO. 1. BpeasTAT AO. # CATAAS ZOnb vaeve NOS OGL4 97aT NE 1 COs CP CULATING Purt?S NOL 4 NOD bKE WOVOTANTLY BENNING. ALL PIPING FOR wATER DioTK/BUTION S19T7E MS O8 Bea Dna SHALL BF ScrPOULe 40 STEEL H/7E. CONTROL vawdb mw ee OPEN Bed FRE Feo, $208 DET UND AMIN? ban 20OP TO Accom F ME FLOW grt Pattie PiP ny Pear On SntET OOF 3S FOR HaTer FeeatwenT PeasT. Gal TEE urs Aeet OOF WOT WATER $.°P oT MOT WATER RETOAN COLO aT em SUPPL 60.0 naTe® AETUAN Deen GINt Aan waTem TACaTED weTea CHLORINATED MATE EX STING Wes OF nasneTe ea Beene WELT EXCHA NORA ~ "70 .tw TE baat (Se Bee TAL ac 5keTS) BOER J TO Low TEMP ALeaM J (gtk ELECTRICAL SxtATS) EF ISTING WETER STORLGP TEN Mrs OeetemaTic TAMAS ALASH A ENVIRONMENTAL CONTROL SERVICES, INC A2OL West B3ed Avense |, Agnes 99003 Ancor TRIAD ENGINEERING PLANNING 8 SURVEYING £997 O18 Sewer t remy Anchuroge, Aiose #9502 BLASKA DEPARTMENT OF ENVIRONMENTAL CONSERVATION VILLAGE SAFEWATER PROGRAM ons THE CITY OF McGRATH WATER IMPROVEMENTS WATER DISTRIBUTION PIPING PLAN | By ae (PI/10 2 Sd RECEIVED FEB 18 1988 RAGS. consulting & design, inc. (206) 675-0375 (907) 462-6906/ 452 2534 P.O. Box 250 88 Wdbddkvoy 104-2nd Av Oak Harbor, WA. 98277 Fairbanks, Alaska 99701 WASTE HEAT UTILIZATION FOR MCGRATH WATER SYSTEM We have made a preliminary investigation of the possibility of using the waste heat from the McGrath Light & Power Company to heat the new circulating water system. During the course of this investigation we discussed the subject with Mr Jim Vanderpool, Mr. Don Brunner and Mr Bill Frazier, all with the Power Company. During the discussions it was determined that: (1) teeret ts adequate heat available to heat the water system, ¢2) that the ; Paver Company would be horee shies to the utilization of the heat, £3) that they would expect Sone compensation for, the heat, 4) that they could not afford any cash outlay towards the installa- tion of the system, and (5) that space could be made available inside their plant for the installation of the necessary heat | exchangers. It was discussed with Mr Vanderpool that possibly the heat could be made available on a “share the savings" basis. This would require a BTU meter to be installed for determination of the heat used. It was suggested that the city peat the initial Fcost oF the installation of ‘the required madi ¥igutione and that the Power. Company would give ‘credit to the city for half of the beset of the installation to be applied to the utilization of the waste heat*. “This would appear to ‘be a fair solution. Of ROUCRE is apn final arrangement will have to be developed by Regot lation Phetween: the Power Perr eo, and City representatives. The orokosed system Feauires modifications to existing piping at the city building. A schematic of the changes is included. The estimated cost for this portion is 5000.00. The most extensive modification is required at the power plant. At this location flow from the 3" return line will be diverted to the power plant where it will pass thru a dual heat exchanger and the BTU meter and be returned to the 3" line. The dual heat exchange is required to provide isolation and additional safety factor from contamination from the antifreeze used in the power units. There will be three | small pumps that will be required to provide circulation between 4 the components. A schematic of the system is provided. j The estimated cost of this system is estimated as follows: ik Extension of pipe to power house $$ 4,000 4 Heat exchanges, pumps, piping and installation 11,600 : BTU meter ; 5,000 ; Modifications at City Building 5,000 4 Total construction cost $25,000 Engineering and contingencies 6,000 ; Travel 2,800 Total Cost $33,800 y There is a BTU meter that is reported to be inoperable that is installed on the loop that served the green house. That unit maybe able to be repaired and utilized in this system. It is = reported that it was the victim of corrosion probably caused by the antifreeze in the heating loop. If so and if it could be repaired it could be utilized since it would be installed in the i water sytem which does not have the corrosive effect of antifreeze. The cant of heating the water system is comprised of three items: > the peat loss from the Pipe, <2), the mea, required to ey em warm the water that goes into the system from the Btonnak tank, and: (3) the heat lone Tr ie the storage tank. Items 1 & 2 can be ye furnished by the "waste heat" system. Item 3 can be partially replaced by reclaiming some of the exhaust building heat. It is calculated that the average heat loss from the pipe is 120,000 BTU per hour for an annual cost (at $1.40 per gal for fuel) of $11,500. Based upon the current useage of 20,000 gallons t per day and that heat is required for 8 months the annual cost of heating the water is #2600,/ The total annual fuel savings would be $14,100. This would be offset by the cost of the electrical power to operate the pumps. These pumps only need to operate for 4 | | we 7 months per year. At the current electrical rates and without state subsidy the cost would be $200.00 per month, including the current state subsidy the cost would be $50.00 per month. $14,100 7 Fuel savings : Electrical costs $50.00 for 7 months =. 350 ‘Maintenance costs $50.00/ month - 600 Net savings $13,150 i Pay back would be accomplished 33,800/13,150 = in 2.57 years if the power company assumes 1/2 of the cost of installation. Thereafter the net annual savings would be approximately $6,600 and the revenues to the power company would be increased by 6,600 plus the total cost of the power ($1,400) or 8,000. This is assuming that a “share the savings" policy is adopted. Modi frcatrorg to Lyishuas Fipting ies ei ! fe en uw ~ a <x y Le" pre yresal eet Lincdine. e ~~ Le 2 ap? (owas fr. oO — “Mw e Gun YK 4 , ow a a. 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