A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A variable speed water-to-water heat pump model used for ground-source applications
The main objective of this study is to model variable speed water-to-water heat pumps ( ) 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 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 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 effect coverage of 60% where it is equal to 75% of the value encountered for effect coverage of 100%.
A variable speed water-to-water heat pump model used for ground-source applications
The main objective of this study is to model variable speed water-to-water heat pumps ( ) 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 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 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 effect coverage of 60% where it is equal to 75% of the value encountered for effect coverage of 100%.
A variable speed water-to-water heat pump model used for ground-source applications
Viviescas, Geoffrey (author) / Bernier, Michel (author)
Science and Technology for the Built Environment ; 30 ; 266-279
2024-03-15
14 pages
Article (Journal)
Electronic Resource
English
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