Transcript B O N N E V I L L E P O W E R A D M I N I S.

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
June 12, 2014
Mira Vowles, P.E., CEM Emerging Technology Project Manager
BPA Energy Efficiency
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
Meeting Topics
1. VC HP Overview (Mira)
2. VC HP Load Based Testing (Ron)
3. VC HP Field Test Results (Tianzhen)
Plus if time allows:
•
School VRF energy-savings (Mira)
•
Other VRF research projects (all)
•
Suggestions for future meetings (all)
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
Variable Capacity Heat Pumps
(VC HP = VRF + DHP)
+
Variable Refrigerant Flow
Heat Pump System
Ductless Heat
Pumps
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 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).
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
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
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 Load Based Testing
Ron Domitrovic, with EPRI
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
VC HP Field Test Results
Tianzhen Hong, with LBNL
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
Next Meeting
7/23/14 at 9 am
Suggestions for agenda items?
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
Washington Elementary School Weather Normalized Annual Electricity
Usage and Savings (kWh)
from HVAC Upgrade and Schedule Adjustments
450,000
Weather Normalized Annual kWh Usage
400,000
14.2%
350,000
55,461
26.2%
55,461
300,000
39,902
250,000
200,000
389,608
150,000
334,147
294,245
Post HVAC Retrofit
(February 2010 - February 2013)
Post HVAC VRF Schedule Adjustments
(March 2013 - May 2014)
100,000
50,000
Pre HVAC Retrofit
(June 2006 - June 2009)
kWh Annual Usage
kWh savings from HVAC retrofit
kWh savings from schedule adjust
Slide 9