A platform for research: civil engineering, architecture and urbanism
Comparisons of load-based and AHRI 210/240 testing and rating for residential heat pumps
The current testing and rating procedure for residential air conditioners and heat pumps is based on a steady-state performance measurement approach with a degradation coefficient to account for cycling losses at part-load conditions. Test equipment performance is measured under various ambient conditions with varying compressor and fan speeds, and the results are propagated through a temperature-bin method to estimate seasonal performance. Although the current rating approach offers a standardized performance metric for comparing the relative performances of different equipment, it involves disabling the native controls and, as a result, does not consider the impact of integrated controls for test units and their dynamic interactions with representative building loads. As an alternative, a load-based testing methodology (CSA EXP07) has been developed in which the dynamic performance of equipment is measured in a test facility by allowing it to respond to a simulated virtual building model. This study compares the steady-state and dynamic load-based performance measurement methodologies for use on a 5-ton residential heat pump system in order to understand the differences and their significance for the next-generation rating procedure. The differences in the two test methodologies' performance evaluation results are discussed with a causal analysis of the observed differences.
Comparisons of load-based and AHRI 210/240 testing and rating for residential heat pumps
The current testing and rating procedure for residential air conditioners and heat pumps is based on a steady-state performance measurement approach with a degradation coefficient to account for cycling losses at part-load conditions. Test equipment performance is measured under various ambient conditions with varying compressor and fan speeds, and the results are propagated through a temperature-bin method to estimate seasonal performance. Although the current rating approach offers a standardized performance metric for comparing the relative performances of different equipment, it involves disabling the native controls and, as a result, does not consider the impact of integrated controls for test units and their dynamic interactions with representative building loads. As an alternative, a load-based testing methodology (CSA EXP07) has been developed in which the dynamic performance of equipment is measured in a test facility by allowing it to respond to a simulated virtual building model. This study compares the steady-state and dynamic load-based performance measurement methodologies for use on a 5-ton residential heat pump system in order to understand the differences and their significance for the next-generation rating procedure. The differences in the two test methodologies' performance evaluation results are discussed with a causal analysis of the observed differences.
Comparisons of load-based and AHRI 210/240 testing and rating for residential heat pumps
Dhillon, Parveen (author) / Horton, W. Travis (author) / Braun, James E. (author)
Science and Technology for the Built Environment ; 29 ; 473-490
2023-05-28
18 pages
Article (Journal)
Electronic Resource
Unknown
Laboratory load-based testing and performance rating of residential heat pumps in heating mode
Taylor & Francis Verlag | 2023
|British Library Conference Proceedings | 1998
|British Library Online Contents | 1998
|Diagnostic Load Testing for Bridge Load Rating
British Library Conference Proceedings | 1997
|