OMA Energy Efficiency & CHP/WER Working Groups. Chillers

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1 OMA Energy Efficiency & CHP/WER Working Groups Chillers

2 Future Schedule Wednesday, June 19 th Chillers Wednesday, July 17 th CHP Case study Doug Fox with Omnova Wednesday, August 14 th Fans / in conjunction with OMA Energy Resources, Energy 8 am Wednesday, September 18 th Site tour / CHP & WER Wednesday, October 19 th Pumps

3 Welcome & introductions News Brief Ohio s Energy Loan Fund Survey feedback Agenda Peer case-study chiller project at Lakeshore Cryotronics From the expert chiller efficiency roadmap Questions and wrap-up

4 Purpose of the Energy-Efficiency and CHP/WER Working Groups Peer learning 11 manufacturers have joined the working group Connect Electric and gas utilities State energy office, AQDA Rural biz Dep. of Ag. PACE (property assessed clean energy) Access to tools and expertise Tool library Technical expertise, project developers Advocate With the utilities, state, etc.

5 Outcome of the Energy-Efficiency and CHP/WER Working Groups Action from last meeting Discussing CHP with two interested manufacturers figuring out screening process and then feasibility assessment with the Midwest Clean Energy Application Center Offered further assistance to two manufacturers who had/are having poor experiences with their utility efficiency program

6 EE/CHP News: Ohio s Energy Loan Fund Ohio Development Services Agency (DSA) (formerly Department of Development) Advanced Energy and Efficiency Programs Energy Loan Fund How does it work? Funds from pre-utility efficiency program rider & ARRA (the stimulus) Revolving loan recipients payments grow fund For energy-efficiency, renewable energy, CHP projects How does it benefit manufacturers? Low-interest rate financing 3% or lower 50% of audit cost covered up to $50,000, if loan closed Requirements Must have an energy audit with a savings calculation At least a 15% reduction in energy consumption Loan term must be 15 years or less

7 EE/CHP News: Ohio s Energy Loan Fund Details 80% of project cost can be covered by the loan Cap of $1,000,000 for loan amount Federal standards apply including not limited to Davis-Bacon, NEPA, Historic Building The opportunity for OMA members Considerable amount of ARRA funds need committed by September 30 th of this year, or they are sent back to federal government Room for flexibility The changes based on input from a meeting with the OMA Parallel path to their EnVinta program Previous energy audits may be allowed to be used Equipment-specific analysis may be allowed to be used Interest rate could be lowered % project covered, and cap on loan amount could be changed

8 EE/CHP News: Ohio s Energy Loan Fund What makes an ideal ELF project? Do you have shovel ready projects that aren t going forward? Does 1% or 1.5% appeal to your finance people? Can you get approval to close on a project by Sept. 30 th? Short window for the low interest rates let us know if you are interested with a specific window in mind. Questions? Feedback Is this program worthy or relevant to you? What else could make this appealing?

9 Survey Results

10 Survey Results

11 Survey Results

12 Survey Results

13 Survey Results

14 Survey Results

15 Case-Study: Lakeshore Cryotronics

16 Chiller Efficiency Roadmap Review of chiller energy consumption Optimizing of existing chiller systems Energy efficiency upgrades Common pitfalls

17 Basics of Chiller Energy Entering Condenser Water Temp Lift Leaving Chilled Water Temp

18 Optimizing Existing Chiller System Reduce Lift - Make the Hill Smaller Increase chilled water setpoint Reset based on OA conditions Reduce mixing Increase HX effectiveness Decrease condenser setpoint Tradeoff between comp. & CT Fan energy Savings 1% per 1 F

19 Optimizing Existing Chiller System Cont. Reduce Cooling Load - Lose some weight Assess end users Reduce loads Insulation Better process controls Use CT water if possible Proper Maintenance - Tune up the bike Clean evaporator & condenser Remove scale from CT fill Install low pressure CT nozzles Maintain proper refrigerant charge Purge non-condensable gases

20 kw Optimizing Existing Chiller System Cont. Chiller Sequencing - Use the right gear ratio Use most efficient combination of chillers to meet load Depends on each chiller s performance curves Pump and CT fan energy Process Chiller Power vs Load Comparison y = x x R² = y = x R² = Tons 750-ton chiller Power (kw) Linear (750-ton chiller Power (kw)) 300-ton chiller Power (kw) Poly. (300-ton chiller Power (kw))

21 Energy Efficient Chiller System Upgrades Chiller Selection Able to operate w/ low ECWT F common Variable speed compressor Better part load performance Variable primary only water flow Consider if load is variable Water-side Economizer Select CT based on winter conditions Dedicated Heat Recovery Chiller Simultaneous need of chilled and hot water Absorption chiller Free waste heat

22 Energy Efficient Chiller System Upgrades Cooling Tower Select induced draft counter flow Twice as efficient vs. forced draft Upsize fill area and reduce fan HP Incremental cost low Variable speed fan

23 Questions & Wrap-Up Future Meetings Wednesday, June 19 th Chillers Wednesday, July 17 th CHP Case study Doug Fox with Omnova Wednesday, August 14 th Fans / in conjunction with OMA Energy Resources, Energy 8 am Wednesday, September 18 th Site tour / CHP & WER Wednesday, October 19 th Pumps