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Flow boiling heat transfer characteristics of R410A in microchannel exchangers: development of experimental facility.

Number: 2497

Author(s) : GUO L., CHEN L., LIN X., HUANG L.

Summary

This research describes an experimental approach focusing on the two-phase boiling heat transfer and pressure drop characteristics of R410A refrigerant within microchannels. An experimental test facility designed to investigate the thermal-hydraulic performance of R410A at various operational scenarios. The experimental loop comprises three circuits: the refrigerant circuit, coolant circuit, and the chiller circuit. The refrigerant circuit is instrumental in regulating mass flow rate, whereas the heat exchange fluid circuit adjusts the heat transfer rate. The chiller loop, circulating an ethylene glycol/water mixture, functions to cool both the refrigerant and brine circuits. This test rig accurately measures heat transfer in channels and exchangers with capacities ranging from 0.05 to 15 kW. It features a two-system configuration, allowing for differentiated control over diverse heat exchange requirements. The refrigerant flow is adjusted using impeller pumps and expansion valves,. The vapor quality is controlled using a plate heat exchanger. This setup enables the adjustment of the vapor quality within the range of 0.02 to 0.98. Once the desired vapor quality is attained and the flow stabilizes in the development phase, it then proceeds to the experimental test segment. This experimental framework not only assures data precision and reliability but also paves the way for gaining insights into the performance characteristics of R410A in microchannel heat exchangers. These findings contribute to the understanding of R410A heat transfer and flow behavior in microchannel heat exchangers and may be useful for advancements in refrigeration technology.

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Pages: 12 p.

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  • Original title: Flow boiling heat transfer characteristics of R410A in microchannel exchangers: development of experimental facility.
  • Record ID : 30033045
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 20th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2024/07/17

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