HomeMy WebLinkAboutASRC-BTI-RSA Kaktovik Warm Storage Facility 2012-EERichard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive Energy Audit
of
Warm Storage Facility
Barter Island/Kaktovik, Alaska
Project # ASRC%BTI%RSA%03
Prepared for:
North Slope Borough School District
Contact: Pat Kennedy Jr, Director of Maintenance and Operations
Phone: 907%852%4410
Barrow, Alaska
March 19, 2012
Prepared by:
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C$6
Anchorage, AK 99501
and
RSA Engineering, Inc.
2422 Arctic Blvd., Suite 200
Anchorage, AK 99503
Barter Island Warm Storage Comprehensive Energy Audit
2
TABLE OF CONTENTS
1. Report Disclaimers 3
2. Executive Summary 4
3. Audit and Analysis Background 8
4. Acknowledgements 10
5. Building Description & Function 10
6. Historic Energy Consumption 13
7. Energy Efficiency Measures Considered or Recommended 13
8. Interactive Effects of Projects 16
9. Loan Program 17
Appendix A: Photos 18
Appendix B: AkWarm%C Report 30
Appendix C: Building Schedules and Plans 41
Performed by: ___________________________
Tyler T. Gray, BSME, CEA
CEA # 1627
RSA Engineering, Inc.
Reviewed by: ___________________________
Richard Armstrong, PE, CEM
CEA #178, CEM # 13557
Barter Island Warm Storage Comprehensive Energy Audit
3
1. Report Disclaimers
The information contained in this report, including any attachments, is
intended solely for use by the building owner and the AHFC. No others
are authorized to disclose, copy, distribute or retain this report, in whole or
part, without written authorization from Richard S. Armstrong, PE, LLC,
2321 Merrill Field Drive, C$6, Anchorage, AK 99501. Additionally, this
report contains recommendations that, in the opinion of the auditor, will
cause the owner to realize energy savings over time. All
recommendations must be designed by a registered engineer, licensed in
the State of Alaska, in the appropriate discipline. Lighting
recommendations should all be first reviewed by running a lighting
analysis to assure that the recommended lighting upgrades will comply
with State of Alaska Statue as well as IES recommendations.
Payback periods may well vary from those forecast due to the uncertainty
of the final installed design, configuration, equipment selected, and
installation costs of recommended Energy Efficiency Measures (EEMs), or
the operating schedules and maintenance provided by the owner.
Furthermore, EEMs are typically interactive, so implementation of one
EEM may impact the cost savings from another EEM. Neither the auditor,
Richard S. Armstrong, PE, LLC, AHFC, or others involved in preparation of
this report will accept liability for financial loss due to EEMs that fail to
meet the forecasted payback periods.
This audit meets the criteria of an Investment Grade Audit (IGA) per the
Association of Energy Engineers definition, and is valid for one year. The
life of the IGA may be extended on a case$by$case basis, at the discretion
of the AHFC.
IGSs are the property of the State, and may be incorporated into AkWarm$
C, the Alaska Energy Data Inventory (ARIS), or other state and/or public
information system.
Barter Island Warm Storage Comprehensive Energy Audit
4
Investment Grade Energy Audit
Barter Island Warm Storage Facility
2. Executive Summary:
The Barter Island Warm Storage Facility is a 13,117 square foot
facility, comprised of two metal structures connected by an enclosed
corridor. The eastern structure or Heavy Equipment Storage (HES)
is 4054 square feet and the date of construction is unknown. The
western structure or Warm Storage (WS) is 9,063 square feet and
was constructed in 2009, replacing the Kaktovik USDW building
previously connected to the HES structure.
The Warm Storage Structure is a pre$manufactured metal
building, constructed slab on grade with structural insulated panels
and a hot roof. The majority (~85%) of the building area is single
level and serves as the Public Works heavy equipment storage and
maintenance area; this area is accessed by twelve (12) 14’ insulated
overhead doors. The remaining 15% of the floor space is two level,
and houses the public works offices, breakroom, welding room,
kitchen, restrooms, bunk rooms, storage areas and boiler room. The
Warm Storage structure is heated with a fuel oil boiler supplemented
with heat recovery from the power plant, and ventilated with exhaust
fans and make up air units serving the equipment bays, and a small
air handler serving the occupied areas per code. Lighting is typically
electric ballast T$8 florescent and LED.
The Heavy Equipment Storage structure is also constructed
slab on grade, however it is wood framed, with a cold attic and batt
insulation. The roof and exterior walls are comprised of metal
paneling. Similar to the Warm Storage building, the majority (~82%)
of the floor area is occupied by vehicle storage and workshop space.
The remainder of the floor area is two level, housing an office,
machine shop, storage, and equipment mezzanine. Heat is provided
by unitary waste oil and #2 fuel oil heaters. Benchmark energy use
data collected for the facility is presented in Table 1 below:
Table 1
2009 2009 2010 2010
Utility Consumption Cost/Year Consumption Cost/Year
Electric (Meter) $ * 436,720 $151,003 * 10,092 $2,078
Barter Island Warm Storage Comprehensive Energy Audit
5
kWh
Electric (Calc’d) $
KWh
** 136,535 $ 36,864 ** 136,535 $ 36,864
No. 2 Fuel Oil $
Gallons
8034 (2010) $ 29,806 6780 (2011) $ 25,176
Heat Recovery $
MMbtu
*** 650 $0 *** 650 $0
Waste Oil $
MMbtu
**** 300 $0 **** 300 $0
Ttl Energy Costs $ 66,670 $ 62,040
* Electrical usage recorded at the meter is disproportionally large in 2009 and small in 2010
due to facility construction and commissioning (costs not included in total)
** Electrical usage data based on AKwarm$C modeling (costs included in total)
*** Heat Recovery data is based on equipment sizing and assumed heat recovery availability
**** Waste Oil data availability of 2800 gallons based on assumed Genset and equipment usage
A benchmark measure of energy use relative to other similar function
buildings in the area is the Energy Use Index (EUI), which takes the
total annual energy used by the facility divided by the square footage
area of the building, for a value expressed in terms of kBTU/SF.
This number can then be compared to other buildings to see if it is
about average, higher or lower than similar buildings in the area.
Likewise, the Energy Cost Index (ECI) is the cost of all energy used
by the building expressed in $/SF of building area. The comparative
values for the subject building are listed in Table 2 below:
Table 2
Kaktovik Warm
Storage Facility
Kaktovik Public
Safety Office
Kaktovik School
Harold Kaveolook
Energy Use Index
(EUI) kBTU/SF
Avg 2009, 2010
190.6 236.2 183.3
Energy Cost Index
(ECI) Average
2009, 2010
$5.08 $9.10 $9.15
Various Energy Efficiency Measures (EEMs) have been analyzed for
this building to determine if they would be applicable for energy
savings with reasonably good payback periods. Those EEMs that
have a payback period or those that are recommended for code
compliance, life cycle replacement, or other reasons are also
included.
Barter Island Warm Storage Comprehensive Energy Audit
6
Specific EEMs recommended for this facility are detailed in the
attached AkWarm Energy Audit Report along with specific payback
times, as well as estimated installation costs and estimated energy
savings. The higher priority items are summarized below:
a. Pumps: The main constant volume heating circulators
serving the terminal heaters and makeup up air units in the
Warm Storage structure can be changed out for variable
speed pumps. This would require removing the 3$way
diverting valves and installing 2 way valves on the two
makeup air units. The pumps can run at lower speeds
when the facility has a low heating demand or the makeup
air units are not being used, which will save power and
reduce cost. The circulation pumps can also be turned off
when there is no call for heating. The pump changes will
provide energy savings for the building with a payback of
under 3 years.
b. Install Setback Thermostats in Occupied Areas: Most of
non$industrial spaces in the building have a daytime heating
setpoint of 70 degrees. It is recommended that the
nighttime setpoint be reduced to 60 degrees F. Costs for
this measure are limited to the installation of nighttime
setback programmable thermostats. The payback for this
measure would be approximately 2 years.
c. Install Lighting Occupancy Sensors: The Warm Storage
Facility is a candidate for the use of occupancy sensor
lighting in the industrial spaces. Generally the vehicle bays
are unoccupied, and the activity is centered at the eastern
end of the building. For a minimum of cost per circuit, the
wall switches can be replaced with occupancy sensors.
The level of occupancy of this building is less than average
and the cost savings realized by the minimal investment
make this EEM an excellent return on investment.
d. Install Door Seals: The 12 overhead doors in the Warm
Storage structure do not have door brush seals. It was
reported that the building is experiencing significant
Barter Island Warm Storage Comprehensive Energy Audit
7
infiltration during storms from around the doors. This is a
basic weather seal device which should be installed.
e. Add Insulation to HES Attic: The Batt insulation was noted
to be notably damaged and compressed above ceiling in
the HES structure. It is recommended that additional Batt
insulation be installed to increase the envelope efficiency.
In addition to EEMs, various Energy Conservation Measures (ECMs)
are recommended that were not part of the energy audit model.
Some involve a modest capital investment. Others are policies or
procedures that are followed by management and employees that
require no capital outlay. Examples of recommended ECMs for this
facility include:
1. Turn off computers, monitors, printers, faxes, coffee
makers, etc when leaving the office for the day.
The priority recommendations in the detailed report estimate to save
$12,094/year, with an installed cost of $46,085, for a 3.8 year
payback. This does not include design or CA services, but overall it
does indicate a cost effective energy savings program.
3. Audit and Analysis Background:
a. Program Description: This audit included services to identify,
develop, and evaluate energy efficiency measures at the
subject building. The scope of this project included evaluating
the building shell, lighting, other electrical systems, and
heating, ventilating, and air conditioning (HVAC) equipment.
Measures were selected such that an overall simple payback
period of 8 years or less could be achieved.
b. Audit Description and Methodology: Preliminary audit
information was gathered in preparation for the site survey,
including benchmark utility consumption data, floor and lighting
plans, and equipment schedules where available. A site visit
was performed to inventory and evaluate the actual building
condition, including:
Barter Island Warm Storage Comprehensive Energy Audit
8
i. Building envelope (roof, windows, etc)
ii. Heating, ventilating, and air conditioning
iii. Lighting systems and controls
iv. Building specific equipment
v. Plumbing systems
c. Method of Analysis: The information gathered prior to the site
visit and at the site visit is entered into AkWarm$C, an energy
modeling developed for Alaska Housing Finance Corporation
(AHFC) specifically to identify forecasted energy consumption
which can be compared to actual energy consumption.
AkWarm$C also has some pre$programmed EEM retrofit
options that can be analyzed with energy savings forecasted
based on occupancy schedules, utility rates, building
construction type, building function, existing conditions, and
climatic data that is already uploaded to the program based on
the zip code of the building. When new equipment is
proposed, energy consumption is calculated based on
manufacturer’s cataloged information.
Cost savings are calculated based on the historical energy
costs for the building. Installation costs include labor and
equipment to estimate the full up$front investment required to
implement a change, but design and construction management
costs are excluded. Costs are derived from Means Cost Data,
industry publications, experience of the auditor, local
contractors and equipment suppliers. Maintenance savings
are calculated were applicable and are added to the energy
savings for each EEM.
The cost and savings are applied and a simple payback and
simple return on investment (ROI) is calculated. The simple
payback is based on the number of years that it takes for the
savings to pay back the net installation cost (Net Installation
divided by Net Savings.)
A simple life$time calculation is shown for each EEM. The life$
time for each EEM is estimated based on the typical life of the
equipment being replaced or altered. The energy savings is
extrapolated throughout the life$time of the EEM. The total
Barter Island Warm Storage Comprehensive Energy Audit
9
energy savings is calculated as the total life$time multiplied by
the yearly savings.
d. Limitations of the Study: All results are dependent on the
quality of input data provided, and can only act as an
approximation. In some instances, several methods may
achieve the identified savings. This report is not intended as a
final design document. A design professional, licensed to
practice in Alaska and in the appropriate discipline, who is
following the recommendations, shall accept full responsibility
and liability for the results. Budgetary estimates for
engineering and design of these projects in not included in the
cost estimate for each measure, but these costs generally run
around 15% of the cost of the work.
4. Acknowledgements: We wish to acknowledge the help of numerous
individuals who have contributed information that was used to prepare
this report, including:
a. Alaska Housing Finance Corporation (Grantor): AHFC
provided the grant funds, contracting agreements, guidelines,
and technical direction for providing the audits. AHFC
reviewed and approved the final short list of buildings to be
audited based on the recommendation of the Technical
Service Provider (TSP).
b. North Slope Borough School District (Owner): The NSBSD
provided building access, original construction plans, two years
energy billing data, building schedules and functions, as well
as other resources needed to perform the audit.
c. Richard S. Armstrong, PE, LLC (Audit TSP): This is the
TSP who was awarded the projects in the Arctic Slope
Regional Corporation, Bering Straits area, and the Nana area.
The firm gathered all relevant benchmark information provided
to them by Nortech, cataloged which buildings would have the
greatest potential payback, and prioritized buildings to be
audited based on numerous factors, including the Energy Use
Index (EUI), the Energy Cost Index (ECI), the age of the
building, the size of the building, the location of the building,
Barter Island Warm Storage Comprehensive Energy Audit
10
the function of the building, and the availability of plans for the
building. They also trained their selected sub$contracted
auditors, assigned auditors to the selected buildings, and
performed quality control reviews of the resulting audits. They
prepared a listing of potential EEMs that each auditor must
consider, as well as the potential EEMs that the individual
auditor may notice in the course of his audit. Richard S.
Armstrong, PE, LLC also performed some of the audits to
assure current knowledge of existing conditions.
Building Description and Function: The subject is called the
Barter Island (aka Kaktovik) Warm Storage Facility, which is 13,117
square feet and comprised of two structures connected by a
walkway. The facility serves as maintenance and storage area for
the Village Public Works department heavy equipment and other
vehicles. The westernmost structure is known as the Warm Storage
(WS) building which was constructed in 2009. The eastern structure
is known as the Heavy Equipment Storage (HES) building of
unknown construction date. The heavy Equipment Storage (HES) is
4054 square feet and the western structure or Warm Storage (WS) is
9,063 square feet. The Warm Storage Structure is a pre$
manufactured metal building, constructed slab on grade with
structural insulated panels and a hot roof. The majority (~85%) of the
building area is single level and serves as the Public Works heavy
equipment storage and maintenance area; this area is accessed by
twelve (12) 14’ insulated overhead doors. The remaining 15% of the
floor space is two level, and houses the public works offices,
breakroom, welding room, kitchen, restrooms, bunk rooms, storage
areas and boiler room. Lighting is typically electric ballast T$8
florescent and LED. The Heavy Equipment Storage structure is also
constructed slab on grade, however it is wood framed, with a cold
attic and batt insulation. The roof and exterior walls are comprised
of metal paneling. Similar to the Warm Storage building, the majority
(~82%) of the floor area is occupied by vehicle storage and
workshop space. The remainder of the floor area is two level,
housing an office, machine shop, storage, and equipment
mezzanine. The Warm Storage structure is in new condition, and
the Heavy Equipment Storage structure is nearing the end of its
useful life and is likely due for major renovations. The facility is
occupied year around.
Barter Island Warm Storage Comprehensive Energy Audit
11
a. Heating Systems: The Warm Storage structure is heated with
a fuel oil boiler supplemented with heat recovery from the
power plant. The WS building heating system consists of two
(2) Burnham V$910AWO cast iron sectional oil fired boilers with
Beckett model CF 2300A burners. The boiler system is
supplemented by a waste heat recovery heat exchanger,
Graham model GPE 26 and injection pump Grundfos model
UPS50$80/4. The boilers and waste heat recovery system are
managed by a Johnson Controls Metasys direct digital
controller. It was noted that a significant amount of heat loss is
occurring to the ground outside the building from the heat
recovery piping loop. Although an accurate estimate of the
heat loss occurring on this section of piping is not available, the
replacement of this piping system should be investigated. Hot
glycol is circulated around the building using two (2) Grundfos
model boiler circulators four (4) Grundfos model building
circulators, sized at 1$1.5 HP each. The pumps are not
equipped with VFD drives, so they run at full speed at all times.
Heat is distributed throughout the building using baseboard
fintube in the occupied spaces, unit heaters and makeup air
units in the equipment bays, utility spaces, cabinet unit heaters
in vestibule entries, and some supplemental heat through
tempered ventilation air.
The Heavy Equipment Storage structure heat is provided
by waste oil heaters and #2 fuel oil heaters. There are three
(2) waste oil heaters manufactured by “Black Gold” with
160,000 Btu/h and / 275,000 Btu/h outputs respectively. There
are two #2 fuel oil unit heaters in the structure, each capable of
303,750 Btu/h output.
b. Ventilation System: The WS structure is ventilated with
exhaust fans and makeup air units serving the equipment
bays, and a small air handler serving the occupied areas per
code. The air handler unit is designed to supply 330 cfm and
is heated by the boiler hydronic system. This unit is controlled
by the DDC system and is assumed to operate on a setback
schedule based on occupancy. The makeup air units are
manufactured by Trane and sized to supply 1780 cfm and
3500 cfm, respectively. MAU$1 is interlocked to only operate
Barter Island Warm Storage Comprehensive Energy Audit
12
when the equipment bay exhaust fan operates. Both makeup
air units operate when Carbon Monoixde levels above setpoint
are detected or the wall mounted timer switch is activated. It is
apparent that the makeup air units rarely operate, due to the
rare occurrence of vehicle operation within the structure. No
additional energy savings can be realized by modifying the
control sequence.
The HES structure has only a vehicle exhaust capture
system equipped with an inline 1 hp belt$drive exhaust fan, and
a welding exhaust fan which is currently inoperative. This
structure does not appear to have sufficient ventilation to meet
current codes. Due to the limited amount of ventilation in this
structure, there are no EEMs recommended for implementation
in this area.
c. Plumbing System: Water is provided from the village utility
and there is not any on$site storage or any metering of water
consumption. Fixtures include water closets, lavatories, single
head showers, break room sinks, mop sinks, and an
emergency shower/shower. There is a passive coalescing
plate style oil water separator installed on the WS vehicle
storage drainage system. There is no plumbing in the HES
structure.
d. Domestic Hot Water: Hot water is generated using a single
indirect water heater, Amtrol / 120ZC$DW. No additional hot
water storage is provided. There is no plumbing in the HES
structure.
e. Lighting: Typical lighting throughout WS building occupied
spaces is T$8 fluorescent fixtures using electronic ballasts and
the vehicle bays have 2 bulb T$8 fluorescent sidewall ballasts.
All lighting is switch operated. The exterior lighting was
recently retrofitted with LED lighting with on photocells.
Lighting in the HES structure was all recently replaced with
new 4$bulb T$8 and 2$bulb HO T$5. Where applicable lighting
is on occupancy sensors and timers.
5. Historic Energy Consumption: Energy consumption is modeled
within the AkWarm$C program. The program only analyzes 12
Barter Island Warm Storage Comprehensive Energy Audit
13
months of data, so where 24 months of data are available, the data is
averaged and input to AkWarm$C to provide more accuracy. The
energy consumption data is presented and graphed in the attached
AkWarm$C program results.
For the purposes of this analysis the received electrical usage
data was not utilized. Actual electrical usage in 2009 was recorded to
be 4367.2% greater than the electrical usage in 2010, which was
negligible. It is assumed that the new Warm Storage structure was
being constructed in 2009 and commissioned in 2010, resulting in this
large disparity of electrical usage. For the purposes of this analysis
the expected electrical usage based on installed equipment,
occupancy and other building factors.
The amount of waste oil burned is based on the diesel
generator oil usage. It is assumed that the operating genset oil is
changed every 250 operating hours, and some additional waste oil is
made available from other heavy equipment.
The average electric consumption for the building is 136,535kWh/year
at an average cost of $36,864/year. The average fuel oil consumption
is 7,407 gallons/year, at an average annual cost of $27,486/year. The
average heat recovery usage is 650 million Btu and the average
waste oil usage is 300 million Btu at no cost. Refer to Table 1.
6. Energy Efficiency Measures Recommended: The building was
examined for application of a multitude of potential EEMs that are
discussed below. Those EEMs that appear to have an application for
the subject building are further analyzed for estimated payback
periods, either within the AkWarm$C program or separately within this
report. The accuracy of the cost estimates and paybacks varies
significantly due to a multitude of conditions, but is estimated to be
approximately +/$ 25%. Assumptions made regarding energy costs
and the life of the EEM, noting that post$construction measurement
and verification are based on energy savings, not energy cost
savings. Many of the selected EEMs are analyzed within the
AkWarm$C program using the schedules and estimated costs input
into the model.
a. Pumps: The main constant volume heating circulators serving
the terminal heaters and makeup up air units in the Warm
Storage structure can be changed out for variable speed
Barter Island Warm Storage Comprehensive Energy Audit
14
pumps. This would require removing the 3$way diverting
valves and installing 2 way valves on the two makeup air units.
The pumps can run at lower speeds when the facility has a low
heating demand or the makeup air units are not being used,
which will save power and reduce cost. The circulation pumps
can also be turned off when there is no call for heating. The
pump changes will provide energy savings for the building with
a payback of under 3 years.
b. Install Setback Thermostats in Occupied Areas: Most of
non$industrial spaces in the building have a daytime heating
setpoint of 70 degrees. It is recommended that the nighttime
setpoint be reduced to 60 degrees F. Costs for this measure
are limited to the installation of nighttime setback
programmable thermostats. The payback for this measure
would be approximately 2 years.
c. Install Lighting Occupancy Sensors: The Warm Storage
Facility is a candidate for the use of occupancy sensor lighting
in the industrial spaces. Generally the vehicle bays are
unoccupied, and the activity is centered at the eastern end of
the building. For a minimum of cost per circuit, the wall
switches can be replaced with occupancy sensors. The level
of occupancy of this building is less than average and the cost
savings realized by the minimal investment make this EEM an
excellent return on investment.
d. Install Door Seals: The 12 overhead doors in the Warm
Storage structure do not have door brush seals. It was
reported that the building is experiencing significant infiltration
during storms from around the doors. This is a basic weather
seal device which should be installed.
e. Add Insulation to HES Attic: The Batt insulation was noted
to be notably damaged and compressed above ceiling in the
HES structure. It is recommended that additional Batt
insulation be installed to increase the envelope efficiency.
7. Interactive Effects of Projects: The AkWarm$C program calculates
savings assuming that all recommended EEM are implemented. If
Barter Island Warm Storage Comprehensive Energy Audit
15
some EEMs are not implemented, savings for the remaining EEMs will
be affected, in some cases positively, and in others, negatively. For
example, if the fan motors are not replaced with premium efficiency
motors, then the savings for the project to install variable speed drives
(VFDs) on the fans will be increased.
In general, all projects were evaluated sequentially so that energy
savings associated with one EEM would not be attributed to another
EEM as well. For example, the night setback EEM was analyzed
using the fan and heating load profile that will be achieved after
installation of the VFD project is completed. By modeling the
recommended projects sequentially, the analysis accounts for
interactive effects between the EEMs and does not “double count”
savings.
Interior lighting, plug loads, facility equipment, and occupants
generate heat within the building. When the building is in cooling
mode, these contribute to the overall cooling demands of the
building; therefore lighting efficiency improvements will reduce
cooling requirements on air conditioned buildings. Conversely,
lighting efficiency improvements are anticipated to increase heating
requirements slightly. Heating penalties are included in the lighting
project analysis that is performed by AkWarm$C.
8. Loan Program: The Alaska Housing Finance Corporation (AHFC)
Alaska Energy Efficiency Revolving Loan Fund (AEERLF) is a State of
Alaska program enacted by the Alaska Sustainable Energy Act
(senate Bill 220, A.S. 18.56.855, “Energy Efficiency Revolving Loan
Fund). The AEERLF will provide loans for energy efficiency retrofits
to public facilities via the Retrofit Energy Assessment for Loan System
(REAL). As defined in 15 AAC 155.605, the program may finance
energy efficiency improvements to buildings owned by:
a. Regional educational attendance areas;
b. Municipal governments, including political subdivisions of
municipal governments;
c. The University of Alaska;
d. Political subdivisions of the State of Alaska, or
e. The State of Alaska
Barter Island Warm Storage Comprehensive Energy Audit
16
Native corporations, tribal entities, and subsidiaries of the federal
government are not eligible for loans under this program.
Barter Island Warm Storage Comprehensive Energy Audit
17
Appendix A: Photos
Heavy Equipment Storage and Warm Storage, view looking North
Warm Storage, view looking South
Barter Island Warm Storage Comprehensive Energy Audit
18
Heavy Equipment Storage, view looking South
HES structure % New LED exterior lighting
Barter Island Warm Storage Comprehensive Energy Audit
19
Heat recovery piping loss to ground % Looking South at Powerplant
WS Burnham cast iron sectional boiler % Typical
Barter Island Warm Storage Comprehensive Energy Audit
20
Heat recovery heat exchanger
Johnson Controls Metasys DDC control panel
Barter Island Warm Storage Comprehensive Energy Audit
21
Warm Storage % Typical equipment bay and highbay T%8 lighting
Warm Storage % Typical makeup air unit and unit heater
Barter Island Warm Storage Comprehensive Energy Audit
22
Warm Storage % No brush seals on overhead doors
HES equipment mezzanine % Vehicle exhaust fan & Compressor
Barter Island Warm Storage Comprehensive Energy Audit
23
HES equipment bay % Typical waste oil heater
HES equipment bay % New highbay T%8 lighting
Barter Island Warm Storage Comprehensive Energy Audit
24
HES cold attic space % Damaged batt insulation
Appendix B: AK Warm Energy Model
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 3/21/2012 11:24 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Public Works Warm Storage/Vehicle Maintence
Facility
Auditor Company: RSA Engineering
Address: 4042 Hula Hula Ave. Auditor Name: Tyler Gray
City: Kaktovik Auditor Address: 2522 Arctic Blvd. Suite 200
Anchorage Alaska 99503 Client Name: North Slope Boroug Public Works
Client Address: Auditor Phone: (907) 27660521
Auditor FAX:
Client Phone: (907) 64066515 Auditor Comment:
Client FAX:
Design Data
Building Area: 13,117 square feet Design Heating Load: Design Loss at Space: 980,140 Btu/hour
with Distribution Losses: 980,140 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and 25%
Safety Margin: 1,494,116 Btu/hour
Note: Additional Capacity should be added for DHW load, if
served.
Barter Island Warm Storage Comprehensive Energy Audit
25
Typical Occupancy: 0 people Design Indoor Temperature: 70 deg F (building average)
Actual City: Kaktovik Design Outdoor Temperature: 639.3 deg F
Weather/Fuel City: Kaktovik Heating Degree Days: 20,370 deg F6days
Utility Information
Electric Utility: North Slope Borough Utilities 6 Commercial 6
Sm
Natural Gas Provider: None
Average Annual Cost/kWh: $0.303/kWh Average Annual Cost/ccf: $0.000/ccf
Annual Energy Cost Estimate
Description Space
Heating
Space
Cooling
Water
Heating Lighting Refrige
ration
Other
Electri
cal
Cooking Clothes
Drying
Ventilatio
n Fans
Service
Fees
Total
Cost
Existing
Building
$54,799 $0 $292 $13,517 $0 $702 $0 $0 $810 $180 $70,301
With
Proposed
Retrofits
$44,524 $0 $280 $11,752 $0 $683 $0 $0 $788 $180 $58,207
SAVINGS $10,276 $0 $12 $1,765 $0 $19 $0 $0 $22 $0 $12,094
Barter Island Warm Storage Comprehensive Energy Audit
26
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 HVAC And DHW Replace constant volume
circulators for terminal
heaters and makeup air units
with pump mounted VFD
units, replace 36way valves
with 26way valves.
$8,424 $20,000 5.99 2.4
2 Setback Thermostat:
Office 204
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Office 204 space.
$95 $200 6.20 2.1
3 Setback Thermostat:
Bunk Room 205
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Bunk Room 205 space.
$76 $200 4.96 2.6
4 Setback Thermostat:
Foreman's Office 103
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Foreman's Office 103 space.
$76 $200 4.93 2.6
5 Setback Thermostat:
Old Building Office
004
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Old Building Office 004
space.
$75 $200 4.87 2.7
6 Setback Thermostat:
Welding 108
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Welding 108 space.
$74 $200 4.77 2.7
7 Setback Thermostat:
Staff Break Room 105
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Staff Break Room 105 space.
$64 $200 4.13 3.1
8 Setback Thermostat:
Storage 106
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Storage 106 space.
$50 $200 3.23 4
9 Lighting: Type F2 6
Day6Brite WB626326
CP6120V
Add new Occupancy Sensor $1,197 $3,840 1.91 3.2
10 Ceiling w/ Attic: Old
Building Roof
Add R619 fiberglass batts to
attic with Standard Truss.
$564 $8,645 1.45 15.3
11 Air Tightening: New
Warm Storage
Building 6 12 overhead
doors
Perform air sealing to reduce
air leakage by 10%.
$1,399 $12,000 1.05 8.6
12 Setback Thermostat:
Kitchen 201
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Kitchen 201 space.
$0 $200 0.00 Infinity
TOTAL $12,094 $46,085 3.45 3.8
Barter Island Warm Storage Comprehensive Energy Audit
27
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Insulation
Rank Location Existing Type/R:Value Recommendation Type/R:
Value
Installed
Cost
Annual
Energy
Savings
10 Ceiling w/ Attic: Old
Building Roof
Framing Type: Standard
Framing Spacing: 24 inches
Insulated Sheathing: None
Bottom Insulation Layer: R625
Batt:FG or RW, 8 inches
Top Insulation Layer: None
Insulation Quality: Damaged
Modeled R6Value: 25.3
Add R619 fiberglass batts to
attic with Standard Truss.
$8,645 $564
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
11 New Warm Storage
Building 6 12
overhead doors
Air Tightness from Blower Door
Test: 15000 cfm at 75 Pascals
Perform air sealing to reduce
air leakage by 10%.
$12,000 $1,399
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
1 Replace constant volume circulators for terminal heaters and makeup air units with pump
mounted VFD units, replace 36way valves with 26way valves.
$20,000 $8,424
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
2 Office 204 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Office 204 space.
$200 $95
Barter Island Warm Storage Comprehensive Energy Audit
28
3 Bunk Room 205 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Bunk Room 205 space.
$200 $76
4 Foreman's Office 103 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Foreman's Office 103 space.
$200 $76
5 Old Building Office
004
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Old Building Office 004
space.
$200 $75
6 Welding 108 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Welding 108 space.
$200 $74
7 Staff Break Room
105
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Staff Break Room 105 space.
$200 $64
8 Storage 106 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Storage 106 space.
$200 $50
12 Kitchen 201 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Kitchen 201 space.
$200 $0
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
9 Type F2 6 Day6Brite
WB626326CP6120V
53 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Add new Occupancy Sensor $3,840 $1,197
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Cooking/Clothes Drying
Barter Island Warm Storage Comprehensive Energy Audit
29
Appendix C: Existing Plans