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Performance comparison of a residential split-system heat pump powered on AC versus DC voltage.

Number: 2213

Author(s) : FARHA A. H. P., ZIVIANI D., KIRCHER K., GROLL E. A.

Summary

Powering the world on DC voltage will be paramount to the future of renewable energy integration as most distributed energy systems are DC-driven (PV panels, batteries, etc.). Additionally, most residential appliances and devices typically run on DC voltage. Therefore, cutting out conversion losses due to AC-DC rectification has the potential for enhancing system efficiency, increasing reliability, and reducing points of failure. In building applications, space conditioning can sometimes account for up to 40% of the energy consumed. With the electrification of heating becoming more prevalent, it is thus necessary to rethink how these devices can be powered in a more efficient manner. The objective of the present study is to elucidate trends in the steady state performance of a variable speed residential split-system Air Source Heat Pump (ASHP) by comparing its performance on AC versus DC power sources in both heating and cooling test modes as prescribed by AHRI Standard 210/240. As a part of this study, a thermodynamic model and experimental results are presented. Findings indicate that the system COP is slightly improved (+2-3%) at full load conditions and worse at part load conditions (-3-5%). Future work will investigate dynamic testing of the DC-driven heat pump in a real home with a DC Nanogrid.

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  • Original title: Performance comparison of a residential split-system heat pump powered on AC versus DC voltage.
  • Record ID : 30033086
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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