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Analysis of the refrigerant maldistribution of propane evaporating in brazed plate heat exchangers as a function of operating conditions.

Number: No 108

Author(s) : ALVAREZ L., ALBALADEJO P., NAVARRO-PERIS E., SCHNABEL L., CORBERÁN J. M.

Summary

One of the most common factors affecting the performance of brazed plate heat exchangers (BPHE) is the not uniform distribution of the refrigerant. This problem is especially important in the evaporator as the refrigerant enters in it in two phase flow and usually the distribution of liquid and vapor is not uniform over all the channels. This problem is very well known in the literature, and manufacturers have implemented some technical solutions like introducing distributors in the inlet port in order to minimize this effect. Nevertheless, the applied solutions usually are developed only for nominal conditions and the deviations in other conditions are normally not known. In this contribution, an experimental analysis of the refrigerant distribution in an evaporator BPHE as a function of the inlet and outlet conditions will be presented. BPHE has been tested and evaluated working at several inlet conditions (quality) and outlet conditions, the refrigerant distribution inside the BPHE has been registered using thermography. From this analysis an estimation of the influence of the refrigerant maldistribution in the system performance has been obtained. 

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  • Original title: Analysis of the refrigerant maldistribution of propane evaporating in brazed plate heat exchangers as a function of operating conditions.
  • Record ID : 30029986
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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