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Comparative experimental analysis of different compressor capacity modulation strategies in R410A chiller with focus on seasonal performance.

Number: 1198

Author(s) : INAMPUDI S. T., BOTTICELLA F., ELBEL S.

Summary

Rising cooling needs for the residential and commercial air conditioning sectors and the demand for higher SEER require HVAC&R to handle cooling loads below the design condition. Though several studies exist focusing on a particular capacity modulation strategy, there is no extensive study that explores all these available modulation strategies in the same experimental facility. This paper is the next step to a previous paper that compared two capacity controls for scroll compressors (single speed and two-stage compressors). The current paper provides insights on additional capacity modulation strategies, including tandem combinations of two single-speed compressors, a single-speed and two-stage compressor, and a variable-speed compressor. These different modulation strategies were tested according to AHRI Standard 551/591 (2020), and their seasonal performance is given by a figure of merit, Integrated Part Load Value (IPLV.SI). All the experimental tests were done using the same R410A water chiller having a nominal cooling capacity of 8 kW. Based on the experimental results, the variable speed compressor has the best IPLV.SI, followed by the tandem combinations. Interestingly, both the tandem combinations (single speed + single speed and two-stage + single speed) have comparable seasonal performance despite having a different number of control states. The estimation of cycling losses using different standards also had an observable effect on the seasonal performance of the tandem combination.

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  • Original title: Comparative experimental analysis of different compressor capacity modulation strategies in R410A chiller with focus on seasonal performance.
  • Record ID : 30030280
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15

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