1. Slide 1 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Variable Capacity Heat Pump RTF Sub-Committee July 24, 2013 Mira Vowles, P.E., CEM Emerging Technology Project Manager BPA Energy Efficiency

2. Slide 2 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Meeting Topics 1.VC HP Overview (Mira) 2.VRF Modeling (Kevin) 3.PNW VRF System Retrofit Projects (Mira) 4.ASHRAE HQ VRF System (Mira) Plus if time allows: Other VRF research projects (all) Suggestions for future meetings (all)

3. Slide 3 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Variable Capacity Heat Pumps (VC HP = VRF + DHP) + Ductless Heat Pumps Variable Refrigerant Flow Heat Pump System

4. Slide 4 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Variable Refrigerant Flow (VRF) Systems VRF systems, either heat-pump or heat-recovery models, provide heating and air-conditioning, with: 1.Inverter driven outdoor-unit compressors and condenser fans, providing improved part-load and low-ambient performance, 2.Multiple indoor-units with multi-speed fans, electronic expansion valves and integrated thermostats, 3. Refrigerant piping network for heat transfer, 4.Integrated control system, and 5.Ventilation provided by VRF system, natural ventilation or a dedicated outside air system (DOAS).

5. Slide 5 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N VC HP Sub-Committee 1.Sub-Committee of the Regional Technical Forum (RTF) 2.Purpose: develop and recommend VC HP measures with a)high consensus methodology to estimate and verify electrical savings b)specification for cost effective installations that ensures persistent savings 3.Minutes and presentations are posted at: http://www.nwcouncil.org/energy/rtf/subcommittees/vchp/Default.htm http://www.nwcouncil.org/energy/rtf/subcommittees/vchp/Default.htm

6. Slide 6 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N VRF Modeling Kevin Campbell, PECI

7. Slide 7 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N PNW VRF System Retrofit Projects Potential DoE demonstration of up to 3, 2014 PNW VRF retrofit projects Baseline metering VRF metering

8. Slide 8 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N ASHRAE HQ VRF System LEED Platinum, Energy STAR label DOAS with enthalpy wheel, VSDs and DCV 1 st floor: 28 ton VRF system with ducted indoor units 2 nd floor: ground-source heat pumps (SEER 28) System Performance Comparison? Available data 1 st & 2 nd floor loads are different

9. Slide 9 B O N N E V I L L E P O W E R A D M I N I S T R A T I O N Next Meeting: 8/28/13 at 10 am Potential topics: Other VRF research projects (all) Suggestions for future meetings (all)