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Development of a high speed R290 compressor for room air conditioner.

Number: 1187

Author(s) : ZHANG L., DA L.

Summary

With the implementation of Kigali Amendment, R290, as a natural refrigerant, has become more and more popular in many applications, for example, in room air conditioner. Compared with recently widely used R32 or R410A in this application, R290 has lower per-unit cooling capacity of swept volume. It means the displacement of R290 compressor need to be bigger than that of R32 or R410A compressor, which will increase the cost of compressor significantly. Another effective way to meet the cooing capacity requirement is to improve the rotational speed of R290 compressor. However with the improvement of rotational speed, there are many challenges for compressor performance and reliability related to compressor structure and key components. This paper mainly focuses on the discharge system of R290 compressor. A mathematical model for the compressor's discharge system was established, and its accuracy was verified through experiments. The research results indicate that adopting a dual discharge structure is an effective way to reduce resistance loss at the compressor's discharge port, but it could increase the clearance volume, resulting in a decrease in performance at low speeds. For the R290 compressor studied in this paper, the balance point between the performance of the single and dual discharge structures is approximately 90Hz.

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  • Original title: Development of a high speed R290 compressor for room air conditioner.
  • Record ID : 30033160
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Publication date: 2024/07/18

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