Transcript Ground Source Heat Pumps Active UES Proposal Presentation to the Regional Technical Forum August 2nd, 2011 UES Analysis by: Shawn Oram & Ben Larson RTF Staff.

Ground Source Heat Pumps
Active UES Proposal Presentation to
the Regional Technical Forum
August 2nd, 2011
UES Analysis by:
Shawn Oram & Ben Larson
RTF Staff Review by: Adam Hadley & Tom Eckman
Presentation by:
Tom Eckman
Background
• April 5, 2011:
– RTF approved the residential UES measure
“Upgrade from ASHP to GSHP”
– RTF staff was asked to:
• finalize documentation of the measure
– measure workbook
– technical specifications
• Develop savings estimates for proposed UES measures:
– “Conversion from FAF w/CAC to GSHP”
– “Conversion from FAF w/o CAC to GSHP”
2
Measure Summary
• Measure name: Ground Source Heat Pumps
• Measure description
– In new or existing site-built or manufactured homes, GSHP system
upgrade from Air Source Heat Pump or conversion from electric
Forced Air Furnace (with or without Central AC). Optional upgrade of
Electric Water heater with Desuperheat pre-heating.
• Measure type: UES
• Requesting Status: Active
– (ASHPGSHP already approved as active)
•
•
•
•
Change in measure status: Yes (proposed  active)
Change in measure savings: No (new measure)
Change in measure cost effectiveness: No
Other or follow-on work for RTF: No
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UES Analysis Summary
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Measure Classification and Properties
Market Sector
Market Segment
Measure Category
Measure Description
Sunset Criteria
Primary Workbook
Linked Workbooks
Number of Measures, and UES Components
Residential
Single Family & Manufactured Home
HVAC and DHW Equipment Upgrade
In new or existing site-built or manufactured homes, GSHP
system upgrade from Air Source Heat Pump or conversion from
electric Forced Air Furnace (with or without Central AC).
Optional upgrade of Electric Water heater with Desuperheat preheating.
April 5, 2016
ResGSHP_v2.xlsm
gshp_SEEM_Calibration.xls
168 measures
- 9 climate zones,
- 2 home sizes,
- w & w/o desuperheat,
- new and retrofit,
- From ASHP, from eFAF w/CAC, from eFAF w/o CAC (only
applies to 3 heating zones)
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Measure Identifiers
Identifier
Measure Type (See UES Table Below)
Climate Zone
Possible Values
(1) Upgrade - ASHP to GSHP with Desuperheater
(2) Upgrade - ASHP to GSHP without Desuperheater
(3) Conversion - Electric FAF w/CAC to GSHP with Desuperheater
(4) Conversion - Electric FAF w/CAC to GSHP without Desuperheater
(5) Conversion - Electric FAF w/o CAC to GSHP with Desuperheater
(6) Conversion - Electric FAF w/o CAC to GSHP without Desuperheater
HZ1 CZ1; HZ2 CZ1; HZ3 CZ1
HZ1 CZ2; HZ2 CZ2; HZ3 CZ2
HZ1 CZ3; HZ2 CZ3; HZ3 CZ3
HZ1; HZ2; HZ3 (applies to eFAF w/oCAC)
House Size
Less than 4000 ft 2
4000 ft 2 or greater
House Vintage
New Construction
Retrofit
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Constant
Parameter
Envelope Efficiency
Possible Values
Fully weatherized existing residence & New Construction
Duct Efficiency
PTCS Sealed ducts
Internal Loads
Assumes advanced lighting but otherwise typical
Floor area of
prototypes
Further Explanation and Sources
1568 Square Feet manufactured home with crawlspace
2200 square feet house with crawlspace
2688 square feet house with basement
5000 square feet house non-standard with basement
Foundation Type
Weighting Factors
< 4000 ft 2 based on 1568 (25%), 2200 (40%), and 2688 (35%)
prototypes;
2
>= 4000 ft based on a 5000 ft 2 prototype.
Useable
Desuperheater
Energy Percentage
75%
Determined from calibration of SEEM
results to Koca, Robert and D'Arcy
Swanson. "Missoula Electric
Cooperative Ground Source Heat Pump
Demonstration Project Final Report"
Nov 19, 1996.
ASHP & GSHP: 70 °F w/ 64 °F setback
eFAF: 66 °F day & night
Based on RTF calibration of SEEM
results to 4 separate studies.
(http://www.nwcouncil.org/energy/rtf/me
etings/2009/11/SEEM%20Calibration.pp
t)
Thermostat Setpoints
(SEEM inputs)
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Unit Energy Savings (UES) Estimation Method, Parameters and Sources
Measure Type
UES
Component
Heating
Savings
Analysis approach
Primary
Parameter /
Adjustment
Factor
Baseline
Description
Efficient Case
Description
Heating
System
ASHP
(HSPF 8.5)
GSHP (COP 3.5 at 32
EWT)
Multiple runs of the SEEM
Cooling
Cooling
ASHP
GSHP (EER 16.1 at 77
simulation engine for
(1) Upgrade - ASHP to
Savings
System
(SEER
14)
deg EWT)
GSHP with Desuperheater
baseline and efficient
cases. Baseline definition Primary DHW Standard electric DHW Desuperheat coil,
DHW Savings is based on NW prototype
tank without
pump and buffer tank
Heat
desuperheater.
w/no
heating elements
house specs, with nonvarying weatherization
Heating
Heating
ASHP
GSHP (COP 3.5 at 32
(2) Upgrade - ASHP to
Savings
System
(HSPF 8.5)
EWT)
parameters set at costGSHP without
effective limits. Where
Cooling
Cooling
ASHP
GSHP (EER 16.1 at 77
Desuperheater
Desuperheater
is installed,
Savings
System
(SEER 14)
deg EWT)
its impact on heating and
cooling system energy is
Heating
Heating
Electric Forced Air GSHP (COP 3.5 at 32
Savings
taken into account in the
System
Furnace (COP=1)
EWT)
SEEM
simulations.
SEEM(3) Conversion - Electric
Cooling
Cooling
CAC
GSHP (EER 16.1 at 77
calculated desuperheater
FAF w/CAC to GSHP
Savings
System
(SEER 14)
deg EWT)
with Desuperheater
energy available is
multiplied by the Useable Primary DHW Standard electric DHW Desuperheat coil,
DHW Savings
tank without
pump and buffer tank
Desuperheater Energy
Heat
desuperheater.
w/no heating elements
Percentage to determine
the
desuperheater's impact
Heating
Heating
Electric Forced Air GSHP (COP 3.5 at 32
on
DHW energy use.
(4) Conversion - Electric
Savings
System
Furnace (COP=1)
EWT)
SEEM model space
FAF w/CAC to GSHP
without Desuperheater
conditioning energy
Cooling
Cooling
CAC
GSHP (EER 16.1 at 77
Savings
consumption outputs
System
(SEER 14)
deg EWT)
match closely the data in
Heating
Heating
Electric Forced Air GSHP (COP 3.5 at 32
the report: Koca, Robert
Savings
System
Furnace (COP=1)
EWT)
(5) Conversion - Electric
and D'Arcy Swanson.
FAF w/o CAC to GSHP
"Missoula Electric
Standard electric
DHW Desuperheat coil,
with Desuperheater
Primary DHW
Cooperative
Ground
DHW Savings
tank without
pump and buffer tank
Heat
Source Heat Pump
desuperheater.
w/no heating elements
Demonstration Project
(6) Conversion - Electric
Heating
Final Report" Nov 19, 1996.
Heating
Electric Forced Air GSHP (COP 3.5 at 32
FAF w/o CAC to GSHP
without Desuperheater
Savings
System
Furnace (COP=1)
EWT)
Baseline Source Efficient Case Source
RTF-determined
standard practice.
GSHP Specification.
RTF-determined
standard practice.
GSHP Specification.
Modeled and Calibrated to Missoulla
Ground Source Heat Pump Study (1996)
RTF-determined
standard practice.
GSHP Specification.
RTF-determined
standard practice.
GSHP Specification.
Engineering
Assumption
GSHP Specification.
RTF-determined
standard practice.
GSHP Specification.
Modeled and Calibrated to Missoulla
Ground Source Heat Pump Study (1996)
Engineering
Assumption
GSHP Specification.
RTF-determined
standard practice.
GSHP Specification.
Engineering
Assumption
GSHP Specification.
Modeled and Calibrated to Missoulla
Ground Source Heat Pump Study (1996)
Engineering
Assumption
GSHP Specification.
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Measure Costs
• Equipment Costs
– FAF costs based on:
Electric Furnace
Cost
CFM
<1200 sq. ft.
800
1200 - 1800 sq.ft.
1200
1801 - 2600 sq.ft.
1600
2600 - 3200 sq.ft.
2000
Price
(acdirect.com
5/20/08)
$
535
$
570
$
600
$
625
Installed Cost
(1.5X multiplier)
$
803
$
855
$
900
$
938
– GSHP and ASHP costs based on sizing
• Details given in 4/5/2011 presentation to RTF
– Desuperheater Cost = $1,000
• FAF Measure Costs = GSHPcost - FAFcost+Dsprhtrcost(if applicable)
• All measures run as “Lost Opportunity”
• Measure Life = 20 years
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Results
10
With Desuperheater
New Construction
Existing Construction
Heating Zone 3
Heating Zone 2
Heating Zone 1
Annual Measure
B/C
Savings
Cost
Ratio
(kWh/yr) (2006$'s)
House from ASHP
less than
from FAF w/CAC
4000
from FAF w/o CAC
sq.ft.
Without Desuperheater
Annual
Measure
Savings
Cost
(kWh/yr) (2006$'s)
B/C
Ratio
New Construction
Annual Measure
B/C
Savings
Cost
Ratio
(kWh/yr) (2006$'s)
Existing Construction
Annual Measure
Savings
Cost
(kWh/yr) (2006$'s)
B/C
Ratio
2,090
$ 4,593
0.8
2,412
$ 4,887
0.9
1,153 $ 3,593
0.6
1,383 $ 3,887
0.7
6,537
$ 8,964
1.3
8,126
$ 9,359
1.6
5,600 $ 7,964
1.3
7,097 $ 8,359
1.6
6,527
$ 8,964
1.3
8,121
$ 9,359
1.6
5,589 $ 7,964
1.3
7,092 $ 8,359
1.5
3,061
$ 6,268
0.9
3,402
$ 7,092
0.9
2,046 $ 5,268
0.7
2,343 $ 6,092
0.7
from FAF w/CAC
11,181
$ 11,207
1.8
13,618
$ 12,285
2.1
10,166
$10,207
1.9
12,560
$ 11,285
2.1
from FAF w/o CAC
11,182
$ 11,207
1.8
13,628
$ 12,285
2
10,167
$10,207
1.8
12,570
$ 11,285
2
House from ASHP
less than
from FAF w/CAC
4000
from FAF w/o CAC
sq.ft.
3,600
$ 8,132
0.8
4,224
$ 8,784
0.9
2,452 $ 7,132
0.6
9,544
$ 12,503
1.4
11,674
$ 13,255
1.6
8,396
$11,503
1.4
10,430
$ 12,255
1.6
9,533
$ 12,503
1.4
11,669
$ 13,255
1.6
8,385
$11,503
1.3
10,425
$ 12,255
1.6
5,450
$ 11,469
0.9
6,192
$ 13,022
0.9
4,270
$10,469
0.8
4,956
$ 12,022
0.8
from FAF w/CAC
15,946
$ 16,409
1.8
19,248
$ 18,216
1.9
14,767
$15,409
1.8
18,012
$ 17,216
1.9
from FAF w/o CAC
15,947
$ 16,409
1.8
19,258
$ 18,216
1.9
14,768
$15,409
1.8
18,022
$ 17,216
1.9
House from ASHP
less than
from FAF w/CAC
4000
from FAF w/o CAC
sq.ft.
5,012
$ 12,506
0.7
5,951
$ 13,693
0.8
3,790
$11,506
0.6
4,638
$ 12,693
0.7
11,775
$ 16,877
1.3
14,291
$ 18,164
1.5
10,553
$15,877
1.2
12,978
$ 17,164
1.4
11,765
$ 16,877
1.3
14,286
$ 18,164
1.4
10,543
$15,877
1.2
12,973
$ 17,164
1.4
7,810
$ 18,148
0.8
8,970
$ 20,631
0.8
6,584
$17,148
0.7
7,676
$ 19,631
0.7
from FAF w/CAC
19,727
$ 23,088
1.6
23,679
$ 25,824
1.7
18,501
$22,088
1.6
22,385
$ 24,824
1.7
from FAF w/o CAC
19,728
$ 23,088
1.6
23,689
$ 25,824
1.7
18,502
$22,088
1.5
22,395
$ 24,824
1.7
House
4000
sq.ft. or
greater
House
4000
sq.ft. or
greater
House
4000
sq.ft. or
greater
•
from ASHP
from ASHP
from ASHP
2,980 $ 7,784
Note: Measures shown here are for Cooling Zone 1, where applicable. Cooling Zones 2 and 3 also have defined UES
measures.
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0.7
Checklist: Guidelines for the Development and Maintenance of RTF-Approved Measure Savings Estimates
Guideline
Response
Notes
1. Introduction and Purpose
Sponsor(s)
RTF
Savings Estimation Method
Unit Energy Savings
Priority
X
High
BPA would like an RTF review prior to October 1.
2. Measure Specification
Measure Identifiers
Yes
Savings Baseline
Yes
Implementation Standards
Yes
Product Standards
Yes
See proposed RTF GSHP Installation Standards
Yes
April 5, 2016 (5 years from first approval)
?
Update cost data, modeling assumptions.
3. Unit Energy Savings
Active
Sunset criteria
Plan adopted for next review
3.1 UES
Estimation
Procedure
Type of Estimation Procedure
Yes
Input Parameters
Yes
Model Calibration
?
UES Components
Yes
Interactions between Measures
Yes
Heating/Cooling Interactions
Yes
Reliable Baseline Data
Yes
except for MH
Yes
except for MH
Yes
SEEM calibrated to 4 SF studies (not to MH, though)
Yes
SEEM calibrated to Missoula GSHP study
Reliable Efficient-case Data
3.2 Required
Quality of Savings Model Calibration - Baseline
Estimate
Model Calibration - Efficient-Case
Sound Analyses Used
Yes
3.2.3 Standard for Did RTF determine savings were reliable?
Reliability
?
Summary Sheet Completed?
3.4
Documentation
Standard
Calibrated Engineering
Yes, except for Manufactured Homes.
Space heat savings, space cool savings, andDHW savings
To be decided at today's RTF meeting (August 2nd, 2011)
Yes
Measure Classification and Properties
Yes
Measure Identifiers
Yes
Constant Parameters
Yes
Estimation Method, Parameters and Sources
Yes
Costs estimated
Yes
Measure Effective Useful Life (years)
Yes
ProCost analysis complete
Yes
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Recommendations
• RTF Staff recommendation(s)
– Adopt measure specifications
– Adopt unit energy savings
– Adopt measure costs
– Adopt Measure life
– Sunset Criteria: Measure shall sunset April 5,
2016.
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RTF Proposed Motion:
“I _________ move that the RTF
- approve the FAF to GSHP UES measures
to Active (or Small Saver) status with a
sunset date of April 5, 2016 and
- adopt the GSHP Specifications
with the following conditions ____________.”
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