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HVAC

HVAC. Best Practices. @ UC Davis. Joshua Morejohn, PE, CEM Energy Manager, Energy Conservation Office. Outline. Energy concepts Lab retrofit Office retrofit Cx vs retrofit People vs retrofits. Energy Concepts. Retrofit Design: L ess is MORE. what do they REALLY need?.

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HVAC

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  1. HVAC Best Practices @ UC Davis Joshua Morejohn, PE, CEM Energy Manager, Energy Conservation Office

  2. Outline • Energy concepts • Lab retrofit • Office retrofit • Cx vs retrofit • People vs retrofits

  3. Energy Concepts Retrofit Design: • Less is MORE what do they REALLY need? • The 3 R’s of Energy-Optimized Operations: • Demand can be Reduced – turn it off • Energy can be Recovered – or lost • Nature has Resources – use them!

  4. Lab Retrofits 100% outside air + high air change rates + high velocity exhaust + 24/7 365 operation = high cooling loads + high reheat loads + high electric loads

  5. Radiant Retrofits Sproul Hall example 74 airtemp conventional cooling radiant cooling 78 airtemp

  6. Commissioning vs Retrofits Examples • Leaking chilled water valve repaired: • Central plant chilled water pumping savings from reduced flow to building • Chilled water building return temperature increased • Building chilled water pump run times/speeds reduced • Steam usage for building is reduced due to reduced heating load at AHU & reduced reheat loads • Heating hot water pump speeds reduced due to lower heating hot water flows

  7. People vs Retrofits feedback from people Energy demand shown in mph Individual building energy demand The speed everyone in the building would have to ride their bike to meet their building’s energy demand

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