Heat Pump Water Heater Model Validation, Market Progress Assessment, and Process Evaluation RTF HPWH Sub-Committee Meeting October 15, 2012 EvergreenEcon.com.
Download ReportTranscript Heat Pump Water Heater Model Validation, Market Progress Assessment, and Process Evaluation RTF HPWH Sub-Committee Meeting October 15, 2012 EvergreenEcon.com.
Heat Pump Water Heater Model Validation, Market Progress Assessment, and Process Evaluation
RTF HPWH Sub-Committee Meeting October 15, 2012
EvergreenEcon.com
Topics
• Quick Review of Study Goals • Metering Site Selection • Site Recruiting Process & Status • Metering Protocols • Process & Market Evaluation Updates • Schedule Update 2
Goal Review
•
For active UES, need more information in 3 Primary Data Collection Areas:
• • •
Hot water consumption In-field COP Space Conditioning Interaction
•
Quick Review of Study Goals
•
Metering Site Selection
3
Metered Hot Water Consumption
• • • •
Metered DHW Energy Use Only (no flow):
• • •
DHP Field Studies (all electric tanks)
•
NEEA: 95 sites
•
BPA: 50 sites RBSA Metering (gas and electric tanks):
•
100 sites Total # Sites with Metered Energy Use: 245 Metered DHW Energy and Hot Water Use:
• • • •
BPA/EPRI: 32 HPWH Sites + ~10 Traditional Tank Sites NEEA/Fluid: 30 HPWH Sites NEEA/RTF: 50 sites Total # Sites; Metered Energy and Flow: 120 National Studies:
•
LBL Database Assume hot water use across all tank water heater types is similar
4
Measurements: In-Field COP
•
Data Collected
• •
Continuous monitoring; one minute intervals
• • • • •
Hot water consumption (gallons) HPWH energy consumption
•
Compressor and electric resistance element run time extracted in data processing ΔT of water delivered Ambient temperature Inlet and Exhaust air temperature
•
Two-Time Measurements
•
For ducted units (assumes constant speed fan)
•
Airflow Sample
•
100+ Sites from 3 studies across the region
• •
Site selection determined by need to quantify independent performance variables Proposed selection in subsequent slides
5
Measurements: Space Conditioning Interaction
•
Interaction primarily determined through simulation using measurements as simulation constraints
•
Data collected:
• •
Continuous monitoring; one minute intervals
• • •
House heating energy use Outside temperature (Optionally, monthly billing data may produce a heating estimate)
•
One-time measurements:
•
House Audit, including
• •
Unheated Buffer Space-to-House UA Unheated Buffer Space estimate of internal gains (equipment audit) Sample
•
100+ Sites from 3 studies across the region
6
HPWH Savings Estimate
•
Build calibrated & validated models of HPWH performance
•
Overlay simulation estimates on regional maps of natural (or potential) HPWH distribution
•
Validating the model requires measurement of independent performance variables across:
• • •
Heating climate zones, Installation locations, and Tank sizes
7
Site Selection Drivers
•
Quantify independent performance variables
• • •
Environmental: Pre-determined by climate HPWH installation location. Primary drivers for our site selection categories.
• •
Ambient conditions of HPWH installation space Cold water inlet temperature User: Secondary drivers for site selection – diverse user base & long metering period will likely provide needed variation
• • •
Draw pattern, Tank temperature setpoint, Control strategy selection Equipment: Previously measured in lab so not a metering driver (but can also be confirmed in the field)
• • •
Tank volume & heat loss rate Heating component output capacity & efficiency Control strategies
8
Site Selection
•
Memo from August 30, 2012 Combined Current Studies Garage Unheated Basement Interior Interior Ducted Tier 1 Small Size < 55 gallons Large Size > 55 gallons HZ1 HZ2 HZ3 HZ1 HZ2 HZ3
14 2 2 - 0 1 0 - 0 0 2 - 3 0 0 - 0 0 0 - 0 0 0 --
HZ1
8 3 - 9
Total Sites: Tier 2 Any Size HZ2
4 0 - 6
HZ3
0 0 - 0
54 Planned New Installs Garage Unheated Basement Interior Interior Ducted Tier 1 Small Size < 55 gallons Large Size > 55 gallons HZ1 HZ2 HZ3 HZ1 HZ2 HZ3
3 4 - 2 2 2 - 1 1 0 - 5 3 4 - 0.5
0.5
2 - 0.5
0.5
0 --
Final Disposition Garage Unheated Basement Interior Interior Ducted HZ1
0 0 - 4
Total Sites: Tier 2 Any Size HZ2
0.5
1 - 6
HZ3
0.5
1 - 6
50 Tier 1 Small Size < 55 gallons Large Size > 55 gallons HZ1 HZ2 HZ3 HZ1 HZ2 HZ3
14 5 6 - 2 3 2 - 1 1 2 - 8 3 4 - 0.5
0.5
2 - 0.5
0.5
0 --
Total Sites: HZ1
8 3 - 13
Tier 2 Any Size HZ2
4.5
1 - 12
104 HZ3
0.5
1 - 99 9
Site Recruiting: Process & Status
Sorted / Screened Call List Recruiter Calls to Determine Eligibility Recruiter Schedules Pre-Qualification Inspection Visit Field Tech Conducts Qualification Inspection Visit Recruiter Schedules HPWH & Meter Installation Visit yes Ecotope & Field Tech Determine Final Qualification no Recruiter notifies site of ineligibility •
Status
• •
Calling began last week Some pre-qualification visits already scheduled
10
Metering Protocols
•
Draft Protocol Memo from October 3, 2012
•
Refer to Memo
11
Test Metering Site Successful
12
Process & Market Evaluation Updates
•
Interview and Survey Guide Development
• • • • • • •
Currently developing in-depth interview guides for: NEEA & Fluid Staff Manufacturers, Distributors, Retailers Installers (e.g., plumbers, contractors) Partner Utility Staff Currently developing CATI survey guides for 100 homes:
• • •
Homeowners with HPWHs installed through the market Homeowners with HPWHs installed through our validation work Survey disposition will be driven by market success
•
Priority is surveying households who installed HPWHs through the market All interviews and surveys will occur in 2013, other than for NEEA staff
13
Schedule Update
•
Field Work
•
Site recruiting October-November 2012
• •
Metering installs November-December 2012 Metering period through June 30, 2012
•
Process & Market
•
NEEA staff interviews early November, 2012
•
All other interviews and surveys in January-February, 2013
14
Questions?
15