Geoffrey Viviescas and Michel Bernier
Article (2024)
Restricted to: Repository staff only until 18 December 2024 Accepted Version Terms of Use: All rights reserved Request a copy |
Abstract
The main objective of this study is to model variable speed water-to-water heat pumps (VSHP) and to examine the impact of the operation of such devices on ground heat exchanger sizing and energy consumption when they are used in ground-source applications.
In the first part of the paper, a complete physics-based steady-state model of a variable-speed water-to-water heat pump is briefly presented. A performance map approach is also used by modifying an existing TRNSYS variable speed heat pump model to provide a minimum speed of operation and a better representation at part load.
Simulation results over a heating season on a residential ground source VSHP indicate that the energy coverage (i.e. percentage of annual heat supplied by the heat pump) increases at a faster rate than the effect coverage (i.e. percentage of peak building heat supplied by the heat pump) for a small value of the effect coverage. For example, for an effect coverage of 60%, the energy coverage is ∼ 93%. It is also shown that the normalized length of the ground heat exchanger varies linearly up to an effect coverage of 60% where it is equal to 75% of the value encountered for an effect coverage of 100%.
Uncontrolled Keywords
water-to-water heat pump; variable speed compressor; performance map; modelling
Subjects: |
2100 Mechanical engineering > 2100 Mechanical engineering 2100 Mechanical engineering > 2105 Hydraulics 2100 Mechanical engineering > 2107 Modelling, simulation and finite element methods |
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Department: | Department of Mechanical Engineering |
Funders: | CRSNG / NSERC |
Grant number: | RGPIN-2019-06961 |
PolyPublie URL: | https://publications.polymtl.ca/56992/ |
Journal Title: | Science and Technology for the Built Environment (vol. 30, no. 3) |
Publisher: | Taylor & Francis |
DOI: | 10.1080/23744731.2023.2295822 |
Official URL: | https://doi.org/10.1080/23744731.2023.2295822 |
Date Deposited: | 20 Dec 2023 15:06 |
Last Modified: | 26 Sep 2024 21:05 |
Cite in APA 7: | Viviescas, G., & Bernier, M. (2024). A variable speed water-to-water heat pump model used for ground-source applications. Science and Technology for the Built Environment, 30(3), 266-279. https://doi.org/10.1080/23744731.2023.2295822 |
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