Abstract
A storage heat pump water heater (HPWH) comprises a vapor compression system and a hot water tank. It can lead to more than 70% energy saving, compared to electric resistance heating. HPWH usually uses a wrapped-tank coil as the water heater. The wrapped coil has a strong interaction with the water tank and impose a new challenge for the engineering design and simulation study. Based on the US DOE/ORNL Heat Pump Design Model (HPDM), a component-based thermal system modelling platform, a segment-to-segment wrapped-tank coil model and a one-dimensional stratified water tank model were developed, which facilitates modeling and design HPWHs having various configurations and components. In the paper, the new HPWH system design model was used to investigate effects of compressor size, refrigerant charge, water draw pattern, and refrigerant type, etc., for predicting 24-hour energy factors and first-hour rating. The HPWH system model was proved to be an effective equipment design tool.
| Original language | English |
|---|---|
| Title of host publication | ICR 2019 - 25th IIR International Congress of Refrigeration |
| Editors | Vasile Minea |
| Publisher | International Institute of Refrigeration |
| Pages | 4310-4317 |
| Number of pages | 8 |
| ISBN (Electronic) | 9782362150357 |
| DOIs | |
| State | Published - 2019 |
| Event | 25th IIR International Congress of Refrigeration, ICR 2019 - Montreal, Canada Duration: Aug 24 2019 → Aug 30 2019 |
Publication series
| Name | Refrigeration Science and Technology |
|---|---|
| Volume | 2019-August |
| ISSN (Print) | 0151-1637 |
Conference
| Conference | 25th IIR International Congress of Refrigeration, ICR 2019 |
|---|---|
| Country/Territory | Canada |
| City | Montreal |
| Period | 08/24/19 → 08/30/19 |
Funding
1 Notice: This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). The authors are grateful to Mr. Antonio Bouza, Technology Development Department of Energy, Building Technologies Office for supporting this work. The authors are grateful to Mr. Antonio Bouza, Technology Development Manager of the U.S Department of Energy, Building Technologies Office for supporting this work.
Keywords
- Heat Pump Water Heater
- Low GWP Refrigerant
- Modelling
- Wrapped-Tank Condenser