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Experimental evaluation of separation efficiency in the intermediate header of microchannel condenser.

Number: 2231

Author(s) : LI J., HRNJAK P.

Summary

An extraction circuitry is implemented in a microchannel condenser for R134a MAC systems. The extraction circuitry has flow extraction through an orifice hole in the lower baffle of the second header. Different sizes of the orifice hole are simulated by needle valve openings. An experimental comparison between the extraction mode and the conventional mode of the condenser is conducted under the same operating conditions. On the heat exchanger level, the extraction mode has been shown to lower the refrigerant outlet temperature by 2.4 K or have an increase of 4.7% of the mass flow rate over the conventional mode. The optimal extraction flow rates for different subcooling of the condenser are also investigated. By separating the extraction flow into a vapor flow and a liquid flow, the separation efficiency and exit qualities of the second header can also be quantified. The effects of inlet mass flow rate and inlet quality on the separation efficiency are studied.

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Pages: 10 p.

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  • Original title: Experimental evaluation of separation efficiency in the intermediate header of microchannel condenser.
  • Record ID : 30030617
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 19th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2022

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