Advanced Heat Pump Water Heater Research Update Conducted by WSU Energy Program Funded by Bonneville Power Administration BPA Technology Innovation Projects.

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Presentation transcript:

Advanced Heat Pump Water Heater Research Update Conducted by WSU Energy Program Funded by Bonneville Power Administration BPA Technology Innovation Projects 292, 302 and 326 1

Current Status Pacific Northwest CO 2 HPWH Research Lab test of Sanden French manufactured unitary 40 gallon HPWH sponsored by NEEA Lab test of Sanden Australian manufactured split 84 gallon HPWH sponsored by BPA Field test of split system at 4 sites Demand Response assessment of Sanden unitary and split systems currently underway sponsored by BPA Field test for combined space and water heat in Next Step Homes sponsored by NEEA and BPA and lab test sponsored by BPA 2

Project Teams (For All Projects) WSU Ken Eklund, Principal Investigator and General Project Manager David Hales, Field Monitoring Installation and Maintenance Adria Banks, Data Analyst Lab Tests Ben Larson, Ecotope, Test Manager and Analyst Kumar Banerjee, Cascade Engineering, Lab Test Director Field Installations Mark Jerome, Clear Result, System Installation Coordinator BPA Janice Peterson, Project Manager Stephanie Vasquez, Project Technical Representative Sanden Maho Ito, CO 2 Product Line Manager Charles Yao, Project Engineer 3

Project Teams Continued Demand Response Controlled Field Study (TIP 302) Graham Parker, PNNL – Lab Homes Project Lead Joe Petersen, PNNL – Technical Lead Greg Sullivan, Efficiency Solutions – Technical Consultant Austin Winkelman, PNNL – Engineering Intern Tony Koch, BPA – Demand Response Engineer Frank Brown, BPA – Demand Response and Efficiency Thor Hinckley, BPA – Smart Grid and Demand Response Combi System Research Charlie Stephen, NEEA – Project Manager Thomas Anreise and Dan Wildenhaus, Clear Result – Next Step Home site analysis and recruitment 4

TIP 292 Project Overview Performance test of split system CO 2 refrigerant Heat Pump Water Heater manufactured by Sanden Lab test to DOE and Northern Climate Specification Field test in partnership with NEEA and: AvistaHeating Zone 2 Energy Trust of Oregon Heating Zone 1 Ravalli Electric CoopHeating Zone 3 Tacoma PowerHeating Zone 1 One install in each territory month monitoring. 5

TIP 302 Project Overview Demand Response tests of Sanden unitary and split system Heat Pump Water Heater Controlled Field Study at PNNL Lab Hom es in Richland, WA – Currently underway Demand Response Lab tests at Cascade Engineering Services in Redmond, WA – Protocol under development by Ben Larson 6

Combi System Research WSU, NEEA and BPA are engaged in research in the use of the Sanden split system unit for combination space and water heating in highly efficient Next Step Homes The partners are currently recruiting builders and sites through the Next Step Home project NEEA will provide all the monitoring plus incentives BPA has agreed to fund the lab test and analysis and reporting of data from both the field and lab research 7

Quick Specifications Equipment currently built and sold in Australia Outdoor Unit Model: GAU-A45HPA Power Input: 240V, 15 A circuit Tank Model: GAU-315EQTA Storage Capacity: 315L (83 gallons) Tank Set Point: 65°C (149°F) – not adjustable Outdoor unit has a variable speed inverter driven compressor, fan and pump Water is heated at the outdoor unit. A pump circulates water from the bottom of the tank, to the outdoor unit heat exchanger, heating the water in one pass, and re-injecting the hot water near the top of the tank No resistance heating element 8

CO 2 Refrigerant Function Source: Rolf Christensen, ATMOsphere

Performance vs. Temperature Linear fit of EF to temperature Use TMY temperature bins to calculate an annual EF: 10 ClimateAnnual EF Boise2.9 Kalispell2.6 Portland3.0 Seattle2.9 Spokane2.8 Outside Air Temperature (F) Energy Factor (EF) COP Output Capacity (kW) Input Power (kW)

Installation-Tacoma

TIP 292 Field Site Characteristics 12 Site LocationSite HDDClimate Area Portland, OR4,461Western Oregon Tacoma, WA4,696Puget Sound Addy, WA6,842Inland Washington Above Corvallis, MT8,156Mountain Region Each site has at least 4 occupants At least 3 years of electric hot water use Represents a climate within the Pacific Northwest

Climate Data From Installation through March 31, Site Minimum OAT (F) Mean OAT (F) Standard Deviation (F) Portland ± 8.88 Tacoma ± 5.33 Addy ± 8.64 Montana ± 11.74

Average Cold Water Temp 14

Average Hot Water Supply Temp 15

16 Average Tempered Water Temp

Water Use Per Site 17 Site Total Cold Water Supply Water (Gal/day) Calculated Total Water added to Tempering Valve (Gal/day) Total Household Hot Water (Gal/day) Addy Montana Portland Tacoma

Daily Water Flow and Energy 18

Field Energy Factor 19 Is the Energy Contained in Total Useful Hot Water / Total Energy In Contains all the invested energy including compressor and freeze protection Also includes the energy losses from the tank and the piping Plus variable such as the ground water temperature—which varied significantly

Field Energy Factor & Outside Air Temp.

Interim Conclusions From Installation Through March 31, 2014 The largest performance factors appear to be amount of daily water use and outside air temperature The Sanden system is capable of providing 150 o F water in minus zero weather and can operate to minus 15.7 o F The weekly Field Energy Factors ranged from 1.1 during a week averaging below 10 o F OAT to 2.5 at 40 o F OAT 21

Next Steps Performance Research Second Interim Report – Data from April 1 through July 31, 2014 – Report due September 30, 2014 Final Analysis and Report – Data through February, 2015 – Report due summer, 2015 Demand Response Research Complete PNNL study, analyze and report Finalize lab protocol, conduct test, analyze and report Combi System Research Recruit, qualify, install systems and monitoring at NSH sites Collect data for at least one year, analyze and report 22