HomeMy WebLinkAboutDelta Greely School District - Biomass Heating System Feasibility Study - 2010 REF Grant 2195395I�FjwllfW
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Coffman Engineers, inc. DeitaiGreely School District
Nvision Architecture Biomass Heating System
This Project includes the design and construction phase assistance for a new biomass central heating
plant to serve the Delta Gleely High School. The engineering design is being performed by Coffman
Engineers of Anchorage, with architectural design support from Nvision Architects, also of Anchorage.
This new biomass system will supplement the existing fuel, oil fired boiler plant and will significantly
reduce the reliance on fuel oil for heating of the school building. Initially, the biomass system Will only
serve the main school building� however, other adjacent structures may be added to the new system,
should funds become available- The new biomass system will not replace the existing fuel oil system but
will supplement it. However, the oil fired system will only be required during the coldest weather.
and heating piping extending between the school and new boiler plant. The new plant will include a of
chip fired boiler, chip storage bin and automated chip feeding mechanisms. The wood chips will be
transported from the location of the potential chip suppliers in chip hauling trailers that will be owned by
the school district, The chip trailers will be equipped with an automated unloading system that will place
the chips in the chip bin inside the boiler building.
The interconnection of the new heat source piping to the existing heating plant will be such that the
biomass system will be first in line to heat the cooler return heating water from the school, After the
biomass heat has been added, the existing oil fired plant will, if necessary, bring the heating water up to
the required final temperature to heat the school, During a significant portion of the heating season, the
biomass system will provide all of the necessary heat and the oil fired plant will be idle- The biomass
system has been engineered with the appropriate capacity so that it can operate at its best operating
point, If the biomass plant were sized to meet 100% of the worst case load it would not function properly
during most of the heating season.
Due to the nature of wood fired boilers, they operate best if they are fairly consistently and fully loaded, as
they do not respond efficiently to large and rapid swings in heating loads. Conversely, the biomass plant
may not be as efficient when the heating loads in the school building are very low, such as during the
early fail and late spring, During the low heating load periods of the overall system, the oil fired boilers
may need to be fired with the biomass system at idle. The capacity factors were taken into account in the
Feasibility Assessment for Wood Heating report referenced below.
The design includes a base bid along with two potential additive alternates in order to match the award
amount to the available grant funding budget.
Base bid will include the biomass plant building to house the boiler, chip bin and chip handling
system to automatically feed the boiler as well as all of the ancillary equipment necessary for a
complete functioning system. The highly advisable enclosed heated chip trailer storage area is
not included in the base bid.
Alternate 1 would include a two bay chip trailer storage area. This storage area would be
enclosed and heated so that the chips would not freeze into a consolidated mass. The
consolidate chips would be impossible to unload.
Alternate 2 would be similar to alternate I above and would function as above, except it would
house all four chip trailers that the school district plans to purchase.
Additional alternates may also be necessary in order to fit the project to the very limited grant funding.
During the design the design team is in a constant process of value engineering the various systems.
However, the design team can not control the bid climate on bid day, so some of the important alternates
Preliminary Executive Summary Page 1 February 3, 2010
Coffman Engineers, inc. Delta,'Greely School District,
Nvision Architecture Biomass Heating System
may not be possible. Should it be necessary, for instance, to move forward with the bare bones base bid
facility, our design will attempt to make the future additions of the alternate items as seamless as
possible.
According to a study prepared by T� R- Miles in August of 2006, and adjusting the numbers for the High
School only, the biomass system. is projected to save an average of approximately 69,000 gallons of fuel
annually which equates to a fuel oil saving of $172,500. The study projects that 1,045 tons of wood chips
will be consumed at a projected cost of $301ton, This volume of wood chips represents a cost of $42,000.
The bottom fine projected overall heating fuel saving will be approximately $130,500 annually. The
Projected cost of the new facility is approximately $3,172,000 for the full four trailer bay facility. A
downsized two trailer bay facility has a projected cost of approximately $2,790,000, For a summary of the
overall project budget please see the following page, Please also see the detailed Cost Estimatz
contained in Appendix
Preliminary Executive Summary Page 2 February 3, 2010
PART 1 - GENERAL
1.1 SUMMARY
A. This Section includes the following:
1. Work covered by the Contract Documents,
2, Use of premises.
3. Owner's occupancy requirements,
4. Work Restrictions,
5, Specification formats and conventions.
B. See Division 01 Section "Temporary Facilities and Controls" for limitations and procedures
governing the use of Owners facilities.
1,2 WORK COVERED BY CONTRACT DOCUMENTS
A. Project Identification: Delta High School Biomass Heating System.
1. Project Location: Delta Junction, Alaska.
B. Owner: Delta Greely School District.
G. Engineers: Coffman Engineers, 800 F Street, Anchorage, AK 99501_
D, Project consists of the construction of a new biomass central heating plant to serve the Delta
Greely High School, The new biomass system will supplement the existing fuel oil fired boiler
plant and will significantly reduce the reliance on fuel oil for heating of the school building.
E. The new biomass boiler plant will be located to 'the north of the existing school building with
buried utilities and heating piping extending between the school and new boiler plant- The new
plan" includes a wood chip fired boiler, chip storage bin and automated chip feeding
mechanisms. The wood chips will be transported to the plant in chip hauling trailers that will be
owned and provided by the school district.
FThe interconnection of the new heat source piping to the existing heating plant will be such that
the biomass system will be first In line to heat the cooter return heating water from the school.
After the biomass heat has been added, the existing oil fired plant will, if necessary, bring the
heating water up to the required final temperature to heat the school, During a significant
portion of the heating season, "he biomass system will provide all of the necessary heat and the
oil fired plant will be idle.
G. Base bid will include a pre-engineered steel biomass plant building to house the boiler, chip bin
and chip handling system to automatically feed the boiler as well as all of the ancillary
equipment necessary for a complete functioning system. The building will also include a heated
two bay chip trailer storage area and hydraulic unloading power system for the trailers. Site
work includes excavation, compacted fill, grading, drainage, and restoration of disturbed areas.
H, The boiler system will include a furnace/boiler capable of 5.0 MMBTUH at a minimurn 70%
efficiency The total system shall consist of a chip bin unloading auger, chain conveyor, or
walking floor; transpo4iJsiffing conveyor, transport 'conveyor to the metering bin, screw auger
metering conveyors and over fire and under fire blowers to support adjustable burn rates and
tuning of the system. The furnace and boiler shall include the above metering, a control panel,
with integration to the DDC, as well as tube soot blower and compressor, included shall be the
clue duct work, multiclone separator, ID fan, and stack.
09603 01 10 00 -1 6110110
DGSD BIOMASS HEATING SYSTEM SECTION 01 10 00
DELTA GREELY SCHOOL DISTRICT SUMMARY
DELTA JUNCTION, ALASKA
1. Project will be constructed under a single prime contract,
1.3 PROJECT LOCATION
A. The project is located on the existing Delta High School property. All work is to be coordinated
with the Delta Greely School District Project Manager, Mr. Kent Scifres, phone (907) 803-4690.
A. The work is to be accomplished and substantially complete and operational not later than
August 1, 2011. Final completion shall be not later than September 1 2011
•
.3
A. General: Contractor Work Area will be limited to the immediate area of construction.
Coordinate with the Owner for Contractor's staging and !aydown area.
B. Use of existing Facilities: Contractor shall have limited use of existing building facilities for
construction operations as follows.
1. The School Year is approximately August 18 to May 19: Contractor will have limited
access of school facilities during this time for the purposes of tie-in to the existing school
systems. Preferred construction 'time is during periods when school is not in session,
a. Contractor shall not assume that any dedicated space will be provided within the
school.
b. Contractor shall be responsible for any damage resulting from Contractors access
or use of facilities including Contractors failure to maintain security to unauthorized
entry.
C. Contractor shall be responsible for daily cleaning of all areas occupied by the
Contractor.
d, Contractor shall not use any School District materials or supplies other than the
owner furnished equipment as noted in the documents.
e. Contractor shall not remove any materials, equipment or furnishings from the
school building.
f. Use shall be limited exclusively to on site workers,
9. Building shall be secured at all times and shall not allow entry to any person
except as authorized by the School District.
h. No Alcohol, drugs or smoking are permitted on school property.
C, Use of Site: Limit use of site and premises to work in areas indicated. Do not disturb portions
of Project site beyond areas in which the Wor is indicated. ik
I Owner Occupancy: Allow for Owner occupancy of Project site and use by the public,
Normal school day is from approximately 8:00 AM to 3 PM, Hours may vary depending
on activities that may be scheduled during the school year, Contractor shall
accommodate scheduled activities within the school facility.
DUse of Existing Building: Maintain existing building in a weathertight condition throughout
construction period. Repair damage caused by construction operations, Protect building and
its occupants during construction period. Maintain existing heating system in operational
condition at all times heat is needed,
1.6 OWNER'S OCCUPANCY REQUIREMENTS
A. Full Owner Occupancy: Owner will occupy site and building during entire construction period.
Cooperate with Owner during construction operations to minimize conflicts and facilitate Owner
usage. Perform the Work so as not to interfere with Owner's day-to-day operations. Maintain
09603 011000 -2 6110110
DGSD BIOMASS HEATING SYSTEM SECTION 01 10 00
DELTA GREELY SCHOOL DISTRICT SUMMARY
DELTA JUNCTION, ALASKA
existing exits, unless otherwise indicated.
BOwner Occupancy During School Year: Owner will occupy all portions of the facility during the
school year for their normal educational program. Operations which may interrupt the school
program will be very limited.
C. Owner Occupancy During Summer Break: Owner will occupy site and existing building for
normal summer occupancy. Ail existing furnishings and equipment will remain in place.
Building will not be occupied for normal school session during the summer break. Cooperate
with Owner during construction operations to minimize conflicts and facilitate Owner usage.
Perform the Work so as protect owners equipment and furnishings.
D. Maintain access to existing fire lanes, roadways, walkways, corridors, and other adjacent
occupied or used facilities. Do not close or obstruct access lanes, walkways, corridors, or other
occupied or used facilities without written permission from Owner and authorities having
jurisdiction.
E. The school may be used as a staging area for firefighters in the event of regional forest fires. If
such occurs, cooperate with the Owner to minimize conflicts during construction operations and
facilitate firefighter usage,
F. Provide not less than 72 hours' notice to Owner of activities that will affect Owner's operations.
M
A. On�Site Work Hours During School Year:
1 Work to be conducted inside the existing building, that will interfere with the instructional
program shall be performed outside of normal school hours with only minor exceptions as
provided above an -a' coordinated with the school administrator. This Will 'include after and
before school on week days and no restriction on weekends or school holidays-
B. Onsite work Hours During Summer Break:
1. Generally there are no restrictions on work hours, except operations shall not disturb
adjacent homes between the hours of 10:00 PM and 8.100 AM.
CExisting Utility lnterruptions� Do not interrupt utilities serving facilities occupied by Owner or
others unless permitted under the following Provisions and then only after arranging to provide
temporary utility services according to requirements indicated:
1. Notify Owner 2 days in advance of proposed utility interruptions.
2. Do not proceed with utility interruptions without Owner's written permission.
1.8 WORK RESTRICTIONS
A. No Alcohol, drugs or smoking are permitted on school property.
A, Specification Format: The Specifications are organized into Divisions and Sections using the
16-division format and CSI/CSC's " Mast erFormat' numbering system,
1 Division 01: Sections in iDivision 01 govern the execution of the Work of all Sections in
the Specifications,
B. Specification Content: The Specifications use certain conventions for the style of language and
the intended meaning of certain terms, words, and phrases when used in particular situations.
09603 011000 -3 6110110
These conventions are as follows:
I Abbreviated Language: Language used in the Specifications and other Contract
Documents is abbreviated, Words and meanings shall be interpreted as appropriate,
Words implied, but net stated, shall be inferred as the sense reqWres. Singular words
shall be interpreted as plural, and plural words shall be interpreted as singular where
applicable as the context of the Contract Documents indicate&
2. Imperative mood and streamlined language are generally used in the Specifications.
Requirements expressed in the imperative mood are to be performed by Contractor.
Occasionally, the indicative or subjunctive mood may be used in the Section Text for
clarity to describe responsibilities that must be fulfilled indirectly by Contractor or by
others when so noted,
a. The words "shall," "shall be," or "shall comply with," depending on the context, are
implied where a colon (:) is used within a sentence or phrase.
PART 2 - PRODUCT4
(Not Used).
PART 3 - EXECUTION
(Not Used).
09603 011000 -4 6/101110
I Al
sums 0
AJAW-MVIUM1111#1
GENERAL
11 RELATED DOCUMENTS
SECTION 13 00 00
A. Drawings and General Provisions of the Contract, including General and Supplementary
Conditions and Division I Specification Sections, apply to this Section.
B. All work specified in Division 22.
C. All work specified in Division 26.
12 SCOPE OF WORK
A. Manufacturer (Biomass Boiler Supplier): Messers-mith Manufacturing, Inc. (Only)
B. Provide the entire biomass boiler, chip feed system and exhaust system as shown and
specified, including the following'.
1- 5.0 MMBTUH boiler with wood chip burning furnace.
2. Bulk chip delivery system including:
a. Chip bin unloading system.
b. Chip conveyor delivery to burner metering bin,
c. Burner metering bin and metering chip delivery.
3, Metering hopper fire prevention system.
4. Ash unloading system.
5. Flue gas system including:
a. Flue ducting from boiler to cyclone separators.
b. Cyclone separators with bottom unloading valves.
C. Induced draft fan.
d. Free standing insulated stack.
6. Controls and control wiring.
7. Controls integration with DDC system.
8. Remote controls and monitoring via modem.
9. System instrumentation.
10. Equipment delivery to site.
11. Installation labor for the above mentioned items.
12. Coordination with the General Contractor.
13. Training and Start-up.
14. Post installation support for operations.
C. All equipment and installation shall be in compliance with OSHA regulations.
D. intent:
1. The intent is for the General Contractor to contract with the specified Biomass Boiler
Supplier to provide all labor and materials, tools, hoisting, scaffolding, supervision,
equipment, and transportation necessary or reasonably inferable as being necessary for
the execution of the work associated with the installation of the boiler system, The
General Contractor may apportion any of the work of this section as seen fit to
accomplish a complete, operational, and functional system, provided that the specified
manufacturer provides the equipment under subcontract.
2, The Contract Documents endeavor to communicate intended completed work. Interim
stages, methods, and means may not be specifically indicated where such is reasonably
inferable by qualified Contractors and workers.
3, The General 'Contractor is responsible for providing the finished work related to the
biomass bolter and equipment they supplied, tested and ready for operation,
4. It is up to the Biomass Boiler Supplier to layout their equipment and provide minimum
building dimensions (including fuel storage) within the limits of the basis of design
drawings. Minor modifications may be made in coordination with the General Contractor,
A6033.12 130000-1 6110110
s
buT shall be approved by the Architect and Engineer.
5, By submitting a proposal, the General represents
thorough examination of _ site, of the and all existing
ve examined the Contract - __ ; d
determined < <d doubt that the drawings, specifications,conditions
adequate and satisfactory for theexecution the work under the Contract.
Where_ work are necessary
scheduling, or installation of items, for accommodation of site conditions . .
project,inferable for this oof between items
Contract Documents, the General Contractor shall make such adjustments a
coordination with the Biomass Boiler Supplier at no added expense to the Owner.
7. Where such adjustments affect functional or design of the work,
submittedbe to the Architect for reviewand r •:
1.3 COORDINATION
A. Refer to architectural and other engineered drawings for building construction and other details
which affect the mechanical installation. They shall confer with these trades for finish adjacent
to their work and arrange to have visible portions of this work flit in and harmonize with the finish
in a manner satisfactory to the Architect.
1 A DEFINITIONS AND ABBREVIATIONS
A. Biomass Boiler Supplier: The person or entity responsible for the supply and installation of the
biomass boiler system and related equipment.
B. General Contractor: The word "General Contractor," as used in these Specifications, means the
Contractor in charge of and responsible for the over all project.
C. Owners Representative: The person or entity designated by the Owner. It may be different
persons or entities for different applications.
D. Provide: The ward "provide," as used in these Specifications, means furnish and install,
complete and ready for the intended use.
E. Indicated: The term "indicated" refers to graphic representations, notes, or schedules on the
Drawings, or other paragraphs or Schedules in the Specifications, and similar requirements in
the Contract Documents. Terms such as "shown," "noted," "scheduled," and "specified" are
used to Help the reader locate the reference. Location is not limited.
F. Directed: Terms such as "directed," "requested," "authorized," "selected," „approved,"
"required," and "Permitted," mean directed by the Owner's Representative and similar phrases.
1.5 SAFETY AND PROTECTION
Safety<
sures: The General Contractor shall be solely and completely responsible for
c di ions of the _ including safety•' < - of
ondit
work. This requirement shall apply continuously and o .d to normalhours.
Comply with "Safety and Health Regulations for Construction," Volume 36, No. 75, Part ti of the
Federal Register by the US. Department <
measures for providing
all such safety state.
wheneverty inspector for
interpretation + • not exist
safetyor is not in compliance with state or federal regulations,
1 The Architect has riot been. retained or compensated to provide design and coristruction
review services relating to the Contractor's t
techniques, sequences, or -ds for the Contractor
A33.2 13 6 - 2 6t1
DGSD BIOMASS BOILER SYSTEM SECTION 113 00 00
DELTA GREELY SCHOOL DISTRICT BOILER SYSTEM EQUIPMENT
DELTA JUNCTION, ALASKA
The Architects observations of the Contractor's performance are not intended to include
review of the adequacy of the Contractor's safety measures in, on, or near the
construction site.
B. Drive Guards: Provide OSHA -approved drive and shaft guards for all exposed, rotating drive
shafts and drive connections between motors and driven equipment including fans, pumps,
compressors, etc. Guards shall include heavy-duty steel frames securely fastened for easy
removal to the equipment frame. Guards, in general, shall be solid sheet metal with tachometer
cutout at shafts where applicable, Fan belt guards shall be heavy mesh or expanded metal to
permit airflow. Guards may be provided by the equipment manufacturer or fabricated by this
Contractor to the manufacturer's clearances, configurations, etc.
C. Head Protection: Where pipe hangers, duct flanges and seams, equipment support angles and
frames, and etc. are exposed in walkways, or in access ways for any maintenance. Cover all
such potentially injurious protrusions within 6'-0" of the floor with padding. Padding shall be
securely and permanently fastened and finished comparable to adjacent finishes.
1,6 CODES, PERMITS, AND INSPECTIONS
A. Work shall be installed in conformity with applicable local ordinances and state statutes.
Standards and sizes which meet or exceed preceding requirements shall be installed as
indicated,
B. The Biomass Boiler Supplier shall coordinate with the General Contractor to give necessary
notices, obtain permits, and pay taxes, fees and other costs, including utility connections or
extensions for the work. File necessary plans, prepare documents and obtain necessary
approvals of governmental departments having jurisdiction. Apply for and pay for all utility
meters and gauges required. Obtain required certificates of inspection for work; retain in the
Project Closeout manual and deliver to the Owner's Representative before request for
acceptance and final payment for the Work.
C. Comply with laws, ordinances, rules, regulations, and lawful orders of any public authority
bearing on the performance of the work,
D� Material and equipment within the scope of the UL Testing Laboratory Service shall be listed by
the Underwriters Laboratories for the purpose for which they are used and shall bear their listing
mark.
E. The Biomass Boiler Supplier shall coordinate with the General Contractor for all inspections by
the authority having jurisdiction when they become due and shall not cover any work until
approved by the governing authorities,
13 QUALITY ASSURANCE
A. Single Source Responsibility-, Comply with the requirements specified in Division 01 Section,
"Materials and Equipment".
B. Unless otherwise indicated or specified, all materials shall be new. The materials and
equipment shall be property stored for protection from physical damage or damage due to
corrosion,
C. Standardization of Manufacturer: Make every effort to furnish all equipment of any equipment
type (such as all fans, all motors, all motor controls, all pumps, all valves, and etc,) from one
manufacturer.
D. Rigging and Appliances: Provide all rigging, scaffolding, staging, and ladders required for
A6033,12 130000-3 6110110
DGSD BIOMASS BOILER SYSTEM SECTION 13 00 00
DELTA GREELY SCHOOL DISTRICT BOILER SYSTEM EQUIPMENT
DELTA JUNCTION, ALASKA
complete installation of all equipment.
E, Manufacturees Directions: Each material for which the manufacturer issues written directions
shall be used according to its manufacturer's directions, as approved and if not at variance \vith
these specifications.
1 If manufacturer's directions are at variance to the contract documents, 'install to the more
stringent requirement within the terms of the manufacturer's warranty. If warranty
conflicts arise, refer the question to the Owner's Representative before proceeding,
F, Accessibility: install all equipment to be easily accessible for operation, maintenance, or repair.
Equipment deemed inaccessible shall be relocated as directed.
G. Drawings and specifications shall be taken together, Provide work specified and not drawn or
work drawn and not specified as though mentioned in both,
HGeneral Locations and Arrangements:
I Drawings (plans, schematics, and diagrams) 'indicate general location and arrangement of
systems and do not attempt to show exact details or all offsets in piping. Do not scale
drawings to obtain final cut lengths, quantities, or the like. Coordinate shop drawing with
the other trades, Iculate
2. Indicated locations and arrangements were used to size ducts and pipe and to ca
friction loss, expansion, and other design considerations, Install systems as indicated,
unless deviations to layout are approved in advance on coordination drawings.
3. Follow drawings in laying out work and check drawings of other trades to verify spaces in
which work will be installed. Install equipment in such a manner as to conform to
structure, avoid obstructions, and keep openings and passageways clear, Lines that
must pitch, or that must have a constant elevation, shall have the right-of-way over lines
not so restricted, Maintain maximum headroom. If space conditions appear inadequate,
notify the Owner's Representative before proceeding o
with the wrk. Make reasonable
modifications in the work without extra cost as needed to prevent conflict with work of
other trades and for proper execution of the work. i assist the Contractor,
4. Site Conditions: The documents indicate certain site conditions to
These drawings are not intended to indicate all conditions. Verify all site conditions prior
to construction.
A. Brand Names: The use of brand names is for the purpose of description and establishing
quality and does not eliminate the requirements of meeting specifications-
& Exceptions; Other brands will be allowed except where an item or class of material is specified
exclusively by trade name and followed by word "only."
C. Requests for Substitutions: Approval of alternative and/or substitute products will be considered
only under terms and conditions specified in Division 01,
im
v Changes Due to Substitutionsi Design is based on equipment as listed in the equipment
schedules and/or specified elsewhere, Where implementation of an approved substitution
requires redesign to any part of the work, provide such redesign. Obtain approvat of redesign
from the Owner's Representative, Redesign cost and additional, construction cost, including
related and incidentally affected work, resulting from the redesign shall be at the Contractors
expense.
0
SUBMITTALS, APPROVALS: AND REVIEWS
General: Comply with all Division 1 requirements,
A6033.12 130000-4 6/10110
SECTION 13 00 00
A.GeneralL Comply with all Division 1 requirements.
110 OPERATION AND MAINTENANCE MANUALS
A. General: Comply with all Division 1 requirements.
B, In addition to the number required by Division I section, 'Closeout Documents', install one copy
of the approved 0 & M Manual in a permanently mounted sheet metal box on wall of the main
mechanical equipment room.
A, General: Provide instruction of all pertinent mechanical systems to facility operating personnel
prior to facility acceptance, upon mutually satisfactory arrangement with Owner, Additional
requirements may be found below which apply to the specific items in that section,
I Instruction: Instruction shalt begin only after the component, assembly, or system is
complete and has been tested and is in acceptable operating condition, Instruction shall
encompass normall operation, emergency operation, fire and other hazards, safety
provisions, pollution prevention provisions, and maintenance procedures for all work
provided.
2, Access polntsA guided tour of all mechanical systems and their access points for every
item requiring O&M access shall Utilize the As-builts.
3Instructors: Instructors shalt be qualified on the system being instructed, Include the
Contractor's staff supplemented by authorized representatives of the component,
assembly, or system manufacturer.
4, Aids: Instruction process shall Utilize the O&M manuals which, if deemed unsatisfactory
in any content, shalt be supplemented in a manner to achieve useful, pertinent, and
complete instruction.
5Time, Provide all necessary instruction to the complete understanding of the operating
personnel. Minimum instruction periods shall be as follows except that where instruction
periods for longer terms are specified herein, such longer term shall apply:
a. Biomass Boiler System: Min. 5 days.
b. Tuning and Support Services: Min. four — two day site visits after operational
turn over to the Owner. See 2.11 "System and Support" for specifics.
1.12 PROJECT CLOSEOUT
A. General: Comply with all Division 1 requirements.
PART 2 - PRODUCTS
2.1 ACCEPTABLE VENDORS
A. Messersmith Manufacturing, Inc. (Only)
22 WOOD CHIP SYSTEMS SHALL BE CAPABLE OF BURING THE FOLLOWING FUELS:
A4 The biomass boiler shall be capable of burning 2-1/2" x 2-1/2" x %` minus chips with an
estimated moisture content of 30-50% (wet basis), Also whole tree chips including green wood
with bark and stems. May include pencil size sticks 3-6' long, Base woods will be birch, aspen,
and spruce.
A6033.112 130000-5 6110110
DGSD BIOMASS BOILER SYSTEM SECTION 13 00 00
DELTA GREELY SCHOOL DISTRICT BOILER SYSTEM EQUIPMENT
DELTA JUNCTION, ALASKA
2.3 WOOD CHIP BIN DELIVERY SYSTEM
A, The chip bin wilt be approximately 7,000 cu ft of storage. It will be supplied by two self -unloading
chip trailer of 40 — 45 ft long. The storage bin will be concrete walled on three sides, The fourth
side shall be the chip distribution end, It will be the biomass boiler supplier's responsibility to
provide the distribution of chips from the chip bin, Acceptable methods include augers, chain
conveyors, or walking floors. The distribution system shall be capable of functioning in fuel
depths of 20 ft,
B. The use of additional equipment such as small tractors or manual labor to move the chips
around shall not be required. The chips shall be delivered by self unloading trucks directly into
the chip bin for distribution.
2.4 WOOD CHIP TRANSPORT TO BIOMASS BOILER METERING BIN
A. Chips shall be distributed from the bulk bin to a transfer conveyor with chip screen for delivery to
the biomass boiler metering bin.
B. The conveyor system shall be designed to minimize the jamming of the system by oversized or
long fuel chips/branches, particularly at junctions between conveyors, augers, and metering
bins.
C. The conveyors used can be of auger, chain, or flat belt type. Or a combination of these.
2.5 BIOMASS BOILER BURNER/FURNACE
A. The burner system shall consist of a metering bin and feed augers to meter the deliver of fuel.
The metering bin shall have a fire suppression system in case of burn back.
B. The furnace shall be refractory lined, insulated, and jacketed. The complete housing shall be
insulated to reduce radiant beat loss to the boiler room.
C. The metering conveyors shall provide fuel to the furnace for optimal burning at low, medium and
high firing rates. The auger speed shall be easily adjustable for tuning the system,
D. The burner shall be a fixed grate or walking decline grate burner with variable speed underfire
and overfire blowers to control the burn rate.
E. The metering conveyors and the underlover fire blowers shall automatically adjust for optimal
burn rate at low, medium, and high fire.
F. At times of no load the furnace shall go into idle mode, and restart itself when the load returns.
2.6 BOILER
A. The boiler shall be ASME rated for 30 psi hot water and ASME stamped.
B. The boiler shall be located on top of the furnace unit and shall be insulated and jacketed with 22
ga shell,
C. The boiler shall be of the 3-pass design, Controls and Trim shall be UL listed.
D. Operating and high limit temperature controls, low water cut-off with manual reset, ASME safety
relief valve, and primary control based on water temperature.
E. The boiler shall include access points for cleaning and maintenance.
A6033.12 130000-6 6/101i4
DGSD BIOMASS BOILER SYSTEM SECTION 13 00 00
DELTA GREED' SCHOOL DISTRICT BOILER SYSTEM EQUIPMENT
DELTA JUNCTION, ALASKA
F. The boiler shall be fire tube or water tube type with an automatic tube cleaner/soot blower and
compressor.
G. The biomass boiler shall be the primary boiler for the school. The oil fired units shall be back Up
in times when the biomass boiler cannot meet the heating demand.
2.7 ASH REMOVAL
X Ash removal shall be capable of running for two days, ;over a weekend) with out operator
attention. The ash shall be augured out of the holding bin of the furnace and into a containment
container.
2,8 CONTROLPANEL
A. The control panel and all controls shall be supplied by the Biomass Boiler Supplier and shall be
UL Listed.
BThe General, Contractor shall coordinate with the Biomass Boiler Supplier to power and wire all
supplied components to their respective disconnects and to the control panel.
C, All wiring shall be installed in galvanized steel, rigid metal conduit (RMC) and installed in
conformance with the locally adopted version of the National Electrical Code, including all local
amendments, Liquid -tight flexible metal conduit (LFMC) shall be utilized only for connection of
equipment subject to vibration, movement, or noise transmission. LFMC shall not be installed
where any combination of ambient conditions and conductor temperature produces an operating
temperature in excess of that for which the material is approved, All work shalf be performed by
a licensed electrician in full accordance with all state and local codes.
D. All motors shall be supplied at 115/1 or 208,13,
E. The controls at a minimum snail have an autodial modem for diagnostics by the Biomass Boiler
Supplier from their home office and the automatic sending of trouble alarms.
F. Integration with building automated control system: The boiler plant will be controlled by a direct
digital control (DDC) system. The supplier shall provide compatible outputs to the DDC system.
Provide the following points for monitoring:
1. Wood burner status (pilot, low, medium, high) (digital output).
2. Chip handling system trouble status (digital output),
3. Stack temperature (analog output),
4. Also see the drawings for additional inputs and outputs.
G. The DDC System will provide the water temperature set point to the boiler control panel. The
boiler control panel shall be capable of receiving a digital input to obtain this value.
H. The controls shall have additional contacts and outputs for communication to the existing DDC
system for monitoring all inputs and outputs of the system.
1. A boiler emergency shutdown button shall be provided and located as shown on the drawings.
1 The control panel shall interface with the fire alarm control panel for a shutdown in the event of a
fire.
A6033.12 130000-7 6110110
-M SEEM
- JEW U*11101i
2.9 INSTRUMENTATION
SECTION 13 00 00
A. The following instrumentation shall be provided, at a minimum. All instrumentation and readouts
shall be in English units.
1. Stack gas temperature (+/- 100F).
2. Stack gas temperature sensor with electronic readout at the biomass boiler control panel,
3. Cumulative run-time metering,
4. Wood handling system trouble/status,
13Provide a multiclone for separation of particulate from the flue gas. The multicione shall have a
lower hopper and manual unloading valves to remove the particulate.
C. Provide a VFD driven induction fan rated for the expected temperatures and gases from the
boiler system.
10. Provide a free standing, double walled and insulated exhaust stack. The external shelf shall be
Corten steel, with a stainless steel liner, and a minimum 2" mineral wool insulation seated from
the weather at any possible exposed locations, The stack shall be designed and stamped by a
professional engineer and submitted as a deferred submittal.
F, The flue gases shaill not produce smoke or odor, Steam plumes shall be kept to a minimum
during winter, so as no', to cause fog or ice fog on the surrounding road ways.
G. The system shall be tuned to burn with complete combustion and low particulate emissions.
Additional test ports shall be installed on the stack for future emissions monitoring.
B. A one (2 day) trip for on -site tuning shall be made during the first winter. Commissioning
shall include operations from full load to minimum toad, pre operational testing and firing, start
up tuning. Coordinate and schedule with owner,
C. All tuning reports shall be submitted to the Owner's Representative and explained in detail to the
Owner's maintenance staff. Tuning reports shall include a minimum of stack temperature, CO2
and 02, excess air, and CO-
D. A minimum of three (2 day) site visits after winter commissioning shall be provided for
on -site support and verification of proper operating procedures. Coordinate and
schedule with Owner.
E. Remote support shall be available 24/7 via the phone and suppliers access to the system from
their home office.
PART 3 - EXECUTION
31 MAINTENANCE REQUIRMENTS, TRAINING AND MANUALS
A6033.12 130000-8 6110110
all ttie Owners' maintenance staff and additional people at the Owner's discretion. The training
shall go over operation, maintenance, and trouble shooting the system. it shall include oversight
While the Owner's maintenance staff grates the system.
12 WARRANTY
• r •
033,1 13 0 - 1 /1
Technical Consultants Phone: (503) 292-0107
TR Miles 470 SW Woodward Way Portland OR 97225 Email: tmiles@trmiles.com
July 12, 2010
To Who it May Concern
Subject: Biomass Boiler Selection for Delta Greely, School System
T.R. Miles, Technical Consultants, Inc, recommends that Delta Greely School System purchase
the new biomass boiler from Messetsmith Manufacturing. We base this recommendation on our
experience with biomass boilers -in schools in the lower 48 states and our knowledge and
experience with similar boiler systems in Alaska since 2004 including the City of Craig boiler.
The Delta Greely Boiler project requires a 5 million Btuh boiler with a wood chip burning furnace
complete with a bulk chip delivery system, chip handling equipment, fire protection equipment,
ash unloading system, flue gas cleaning equipment, instrumentation and controls including
integration with the DDC and remote monitoring, installation, coordination, training, startup and
post installation support.
Supplier Selection.
The success of a boiler installation in a school depends largely on the experience and the nature of
the supplier, In Alaska boilers of similar size have had difficulties in startup and reliable operation
and cost. Industrial boilers have been unused for extended periods of time. Much of this is due to
the commitment of the supplier to support the installations once they are in operation, Due to its
remoteness this is even more important in Alaska because of the relative inaccessibility compared
to other parts of the country. In other areas the success of school projects has depended on the
supply and performance of the individual suppliers in a turnkey project.
Messermith stands out in several areas of design and operation.
I. Experience
Messersmith has installed boiler system in many different environments, They have found
ways to make their systems work in adverse conditions, Messersmith owners are happy
with their system performance. Delta Greely School District does not have the budget or
the resources to experiment with new suppliers to schools or to Alaska.
1 System Design
Messersmith has demonstrated that they deliver a superior fuel handling system to other
suppliers of small boilers, Their grate system is robust and adaptable to a variety of fuels
and fuel qualities, They have performed at the top of boilers in recent comparative tests for
environmental emissions.
July 13, 201-0
3. Integrated System
Since they build and supply their own systems they can adapt to local circumstances and
adjust to the particular behavior of the local fuel. Other suppliers must rely on third party
vendors for fuel systems and integrate the operation in the field. Messersmith builds the
whole system in their shop before shipping it onsite. If there is a problem they have a
turnkey responsibility and have been good at fixing any problems that rise.
Messersmith systems meet the cost and efficiency targets for fuel to steam conversion and
for emissions. Performance of other systems is often f-ael specific.
5, Reliable Operation
Meseersmith boilers have performed reliably in many systems with different fuels. Their
systems are simple and reliable when properly maintained, This is important to achieve the
financial objectives of the biomass energy system,
6. Support
Messersmith has a positive reputation for support for their systems, A Messersmith fuel
feeder operated reliably in Alaska for several years. In a solicitation for boilers for Tok the
Alaska Gateway School District found Messermith to offer better support services than
other potential suppliers. Lack of support has been a problem with the wood chip boiler in
Craig. Selection of Messersmith by Tok is a strong incentive to select a compatible system
for Delta Greely due to the proximity and the ability to share support, spare parts for
reliable operation, especially under potential difficult weather conditions. By sharing
common systems the neighboring school districts could share cross training of personnel.,
spare parts, and customer service.
Very truly yours,
Thomas R. Miles
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