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Experimental investigation of HFC410A air-conditioning system substituted for liquid-vapor separation condenser.

[In Chinese. / En chinois.]

Author(s) : DENG L., CHEN Y., MO S., et al.

Type of article: Article

Summary

Liquid-vapor separation condenser (LSC) is a kind of heat exchanger with high in-tube condensation heat-transfer coefficient. It adopts some enhancement means, such as the parallel flow condensation with multi tube passes, draining away condensate between two adjacent passes and optimization of the tube number of refrigerant route. In the present paper, the LSC was applied in an HFC410A air conditioning system and measured in the standard air enthalpy difference lab. Compared with the prototype HFC410A system, the cooling capacity and EER of the LSC system were 96.4% and 93.8% respectively. The results present the LSC is a poor substitution for the original condenser. The analysis shows HFC410A reduced the performance of LSC by weakening the liquid-vapor separation effect, which results in the condensation process in HFC410A LSC no longer keeping the quasi-constant wall temperature as that in the HCFC22 LSC. The looping refrigerant mass flux in the HFC410A system was 1.2%~9.2% lower than that of HCFC22 system at the same condensation temperature, and the pressure drop of the LSC in HFC410A system was seen to increase by 39.1%~52.6%.

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Pages: 26-31

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