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-CommitteeSeptember 28, 2011

Mira Vowles, P.E., CEM Emerging Technology Project ManagerBPA Energy Efficiency

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)

+

Ductless Heat Pumps

Variable Refrigerant FlowHeat Pump System

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

SCE Upstream VRF Program Summary

Started in 2010

Distributers receive incentives

Energy Solutions administers program

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

Upstream VRF Program Discussion

Jeff Johnston, LEED AP

Energy Solutions Project Manager

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

Small Office VRF Savings Summary

VRF HP Measure #

Baseline System Location (TMY) (kWh / ton)

Gas Heat Offset

(Therms / ton)

Therm Savings ($)

1Small Office ASHRAE System #3 (Packaged single zone AC with gas heat)

Seattle 1,464 15 $15

2Small Office ASHRAE System #3 (Packaged single zone AC with gas heat)

Spokane 1,288 42 $42

3 Small Office ASHRAE System #4 (Packaged single zone heat pump)

Seattle 1,651 0 $0

4 Small Office ASHRAE System #4 (Packaged single zone heat pump)

Spokane 1,888 0 $0

Average 1,573 kWh  

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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

Medium Office VRF Savings Summary

VRF HP Measure #

Baseline System Location (TMY) (kWh / ton)Gas Heat

Offset (Therms / ton)

Therm Savings ($)

5Medium Office ASHRAE System #5 (Packaged VAV with gas boiler reheat)

Seattle 620 68 $68

6Medium Office ASHRAE System #5 (Packaged VAV with gas boiler reheat)

Spokane 453 59 $59

7Medium Office ASHRAE System #6 (Packaged VAV with electric reheat)

Seattle 1,596 0 $0

8Medium Office ASHRAE System #6 (Packaged VAV with electric reheat)

Spokane 1,808 0 $0

Average 1,119 kWh  

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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

Small Office VRF Cost EffectivenessVRF HP

Measure #Baseline System

Location (TMY)

Incr. Cost ($ / ton)

BCRSPB

(years)

BPA Incentive

($)% Savings

1Small Office ASHRAE System #3 (Packaged single zone AC with gas heat)

Seattle 835 3.1 8 $319 62.5%

2Small Office ASHRAE System #3 (Packaged single zone AC with gas heat)

Spokane 835 3.1 9 $281 51.3%

3Small Office ASHRAE System #4 (Packaged single zone heat pump)

Seattle 860 3.1 7 $360 65.3%

4Small Office ASHRAE System #4 (Packaged single zone heat pump)

Spokane 860 3.6 7 $412 60.7%

Average BCR 3.2   $343 60%

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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

Medium Office VRF Savings SummaryVRF HP

Measure #Baseline System

Location (TMY)

Incr. Cost ($ / ton)

BCRSPB

(years)

BPA Incentive

($)

% Savings

5Medium Office ASHRAE System #5 (Packaged VAV with gas boiler reheat)

Seattle 540 3.4 3 $135 34.9%

6Medium Office ASHRAE System #5 (Packaged VAV with gas boiler reheat)

Spokane 540 2.6 3 $99 25.0%

7Medium Office ASHRAE System #6 (Packaged VAV with electric reheat)

Seattle 540 4.8 5 $348 31.5%

8Medium Office ASHRAE System #6 (Packaged VAV with electric reheat)

Spokane 540 5.5 6 $378 42.5%

Average BCR 4.1   $240 33%

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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 Program Research Questions Can whole building regression analysis be used to

verify savings?

How can savings associated with changes to ventilation systems be verified cost-effectively?

How big of an effect do other baselines have on savings?

Other?

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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 Program Delivery Questions Can this be a utility equipment rebate program, instead of

an upstream program?

Limit to replacement on burn-out?

How to ensure replacement on burn-out?

Limit to baseline systems?

How to ensure baseline systems?

Other?