Bryan Long EIT, CGD-ITNAVFAC ESCPort Hueneme CA
805-982-5177
Utilizing Alternative Heat Source / Sinks to Heat / Cool Navy Facilities
IGHSPA Conference, Nashville, TNOctober 2, 2008
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Presentation Outline
•Energy efficiency / renewable energy drivers for Federal Government
•Existing challenges with implementing traditional GSHP technology in certain locations
•Alternative options to implement high efficient HVAC technology
•Navy projects constructed and proposed–Dam Neck HRSD Loop
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Federal Requirements for Energy Efficiency / Renewable Energy
• EPACT 05- Reduce energy expenditures by 2% per year from 2003 baseline for the measurement of energy savings–“… to the extent economically feasible and technically practical, the following (electrical energy
consumption) shall be renewable:”• a) > 3% in FY 2007 - 2009• b) > 5% in FY 2010 - 2012• c) > 7.5% in FY 2013 and thereafter
• EO 13423–(i) ½ renewable energy consumed in an FY comes from “new” renewable sources,–(ii) to the extent feasible, implement renewable energy generation on agency property – Improve energy efficiency and reduce greenhouse gas emissions
• 3 percent annually through the end of fiscal year 2015• or 30 percent by the end of fiscal year 2015
• EISA 2007–Sec. 433 Federal Building Energy Efficiency Performance Standards
• Reduce Fossil Fuel Use–built/renovated in 2010 must cut fossil-fuel dependency by 55%–Eliminate use of fossil fuel energy for new/renovated buildings by 2030
• NDAA 2007 sets a goal of 25% energy produced on site at DOD facilities by renewables by 2025 • FEMP guidance for EPACT 05 and EO13423 (guidance not yet available for EISA 07):
–http://www1.eere.energy.gov/temp/renewable_energy/renewable_fedrequire.html
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Challenges with incorporating traditional GSHP technologies
•Land restrictions can make it difficult to install well fields in densely populated areas
–Coastal areas of the country often populated, space a premium
•Poor soil thermal conductivity making traditional GSHP too cost prohibitive
•Certain areas of the country still do not have strong GSHP industry driving up the install cost (western states)
• In certain locations, alternative heat source / sinks exist making them the best / most cost effective option
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Alternative Heat Source / Sink Options
•Sea / Lake Water heat source / sink–Renewable, very efficient cooling technology–Reduce energy consumption to generate chilled water–No cooling tower (eliminate fresh water use for evaporative cooling)
•Water / Wastewater Discharge heat source / sink–Navy DamNeck HRSD loop
•Municipal Water Supply heat source / sink??
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Alternative Heat Source / Sink Options
Source: Makai Ocean Engineering, Inc.
Chilled Water Distributionand Building Systems
Central Heat Exchange and Pumping Facility
Sea/Lake Water Intake and Return (open loop)
Sea/Lake Water Source System
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•Single Building Application–Seawater provides all cooling for about 10 months per year
–Reduced operation/ maintenance costs
–Savings of $117,000/year
–Simple payback of 2.3 years
Source: http://www.ecbcs.org/docs/annex_28_case_study_buildings.pdf
Technology MaturityPurdy’s Wharf Halifax, Canada
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•District Cooling Application–Reduces the campus energy use for cooling by 80% –Designed to last over 75 to 100 years, over twice the
typical life of chillers
Technology MaturityLake Source Cooling - Cornell university
Source: http://www.utilities.cornell.edu/utl_ldlsc.html
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US NAVY DAM NECK ANNEX HRSD LOOP SYSTEM
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• DOE authorization to Trane in Dec 2004
• Request for proposal to Trane in Jan 2006
• Building proposals submitted and approved in May-June 2006
• HRSD Water Reuse MOA signed in Aug 2006
• Final proposal from Trane in Aug 2006
• Navy review of final proposal in Sep 2006
• Congressional notification of proposed project in Sep 2006
• Contract award in Dec 2006
• Contract construction completion in Sep 2008
• Ribbon cutting ceremony on October 9, 2008
Dam Neck Annex Project History
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HRSD Atlantic Treatment
Plant
Condenser Cooling Water
Loop (Typ.)
Heat Exchanger
Plant
Atlantic Ocean
HRSD Effluent
Line
Dam Neck Annex Project Site
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• 10 Buildings (487,231 SF)
• 451 Tons of HVAC (89 GSHP Units)
• 411 Tons of HVAC on the HRSD Condenser Loop
• Bldg 448 - 40 Tons of HVAC using Vertical Drilling GHP Technology
• Well field Sizing: 326 ft/ton in 40 wells
• GSHP’s are classified as a Renewable Energy Source
Ground Source Heat Pump Energy Conservation Measure
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• HVAC Improvements in 14 Buildings (1,624,269 SF)
• Condenser Cooling Water Loop (Cooled by HRSD effluent) provided to 15 Buildings (1,530,155 SF)
• 2,142 Tons of New-Installed HVAC on Condenser Cooling Water Loop
• 1,400+ Tons of Existing HVAC on Condenser Cooling Water Loop
• 10 miles of Condenser Distribution Loop Piping in Sizes from 2” to 36” diameter
• 0.5 miles of HRSD/Heat Exchange Plant Piping, 36” diameter
Heating, Ventilation and Air Conditioning Energy Conservation Measure
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• Existing HRSD Atlantic Treatment Plant Effluent Line runs through Dam Neck Annex (HRSD easement)
• Project Uses 14MGD as heat sink for Condenser Loop• Water is used to cool condenser water loop water
• Effluent water and condenser cooling water do not mix
• Qualifies as a renewable energy source
• HRSD Constructed, Own, and Operate Tapping Sleeves and Valves
• Project Paid HRSD for Tapping Sleeves and Valves
• No Cost for Water – only a small annual administration fee.
• MOA in effect until 2027 (HRSD easement expires)
HRSD Effluent Heat Exchange System
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Heat Exchanger/HRSD Effluent System
HRSD AtlanticTreatment Plant
Building(GSHP)
Typ.
Building(Chiller)
Typ.
HeatExchangers
Building(Chiller)
Typ.
Building(GSHP)
Typ.
HR
SD
Effl
uen
t L
ine
Condenser Cooling Water Loop
Atlantic Ocean
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Tapping Sleeves and Valves
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Tapping Sleeves and Valves (cont’d)
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Heat Exchanger Plant
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Condenser Cooling Water Loop
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HRSD Effluent/GSHP Comparison
• GHP Drilling Costs and HRSD Effluent/Condenser Cooling Water GHP Drilling Costs and HRSD Effluent/Condenser Cooling Water Loop Costs approximately equalLoop Costs approximately equal
• Effluent Water is a more efficient source than GSHP (Winter & Effluent Water is a more efficient source than GSHP (Winter & Summer)Summer)
• No issues related to building up ground temperatures over timeNo issues related to building up ground temperatures over time
• Effluent and GSHP Systems equal life expectancyEffluent and GSHP Systems equal life expectancy
• HRSD Effluent System allows use on existing chillers – Greater Use HRSD Effluent System allows use on existing chillers – Greater Use of the Navy investmentof the Navy investment
• Many existing exterior cooling towers eliminatedMany existing exterior cooling towers eliminated
• HRSD Effluent/Condenser Cooling Water LoopHRSD Effluent/Condenser Cooling Water Loop has large growth has large growth potential at minimal costpotential at minimal cost
Greater Use, More Efficient – Costs the SameGreater Use, More Efficient – Costs the Same
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Project Savings pay for All Project Costs Trane Manufactured Products Warranted for Project Term
(17 years) Service and Preventative Maintenance provided by Trane
for the Project Term (17 years) Non-Trane Installed Equipment Repair and Replacement
Escrow Fund documented with Project Savings (17 years) Annual Measurement and Verification of Project Savings
(17 years) HRSD Effluent Heat Exchange System Expandable at
minimal cost Equipment protected from corrosive environment (new
equipment either underground or in buildings) Energy Efficient Equipment Infrastructure Improvements
Dam Neck ESPCProject Benefits and Attributes
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Project Financial StatisticsProject CostProject Cost $32,885,728$32,885,728
Annual Savings (FY06 Baseline)Annual Savings (FY06 Baseline) $2,828,636$2,828,636
Simple Payback: Simple Payback: 11.6 years11.6 years
Energy SavingsEnergy Savings $2,299,364$2,299,364SteamSteam$2,133,361$2,133,361
ElectricityElectricity $ $ 383,770383,770
Natural GasNatural Gas ($ 556,189)($ 556,189)
Fuel OilFuel Oil $ $ 6,322 6,322
Water /Chilled WaterWater /Chilled Water $ 200,249$ 200,249
SewerSewer $ $ 131,851131,851
Operations and Maintenance SavingsOperations and Maintenance Savings $ 529,272$ 529,272
Service Service $ $ 304,221304,221
PM PM $ $ 225,051225,051
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Additional Navy Alternative GSHP projects Underway
•WSHPs to be installed in berthing barges in the Puget Sound, WA
–Barges used to house sailors that work on ships–Currently barges tie into base’s utilities including steam and electricity to provide heating / cooling for the barges
–WSHPs tied directly to the Puget Sound will allow for more efficient heating / cooling of barges
•Conducting feasibility studies on:–SeaWater Cooling in Yokosuka, JP–Utilizing waste heat from a computer datacenter to heat exterior of building in Monterey, CA
–Utilizing water from a remediation site to cool a large maintenance center in Barstow, CA
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Key Partners – Dam Neck HRSD Project Presentation Acknowledgements
–Jody Wilkins, Federal Sector Project Developer
–Roger Shull, Norfolk Sales District
–Don Delegrange, Construction Project Manager
•Hampton Roads Sanitation District
–Ted Henifin, HRSD Director–Karen Harr, Chief of Water Reuse
–John (J) Dano, Project Manager
•NAVFAC–Sean Foley, Contracting Officer
–Robert Harvey, Project Facilitator
–Andrew Porter, Navy Technical Representative
–ENS. Michelle Caponigro, Construction Manager
•Trane–David Hayden, Federal Account Executive
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“All we have to decide is what to do with the time that is given us.”-Gandalf, Lord of The Rings, The Fellowship of the Ring
QUESTIONS??Bryan Long, EIT, CGD-IT
NAVFAC ESCPort Hueneme CA
