In this work, the heat transfer coefficient and pressure drop of R-410A is investigated. The test section is an aluminium multiport mini-channel having a hydraulic diameter of 3.48 mm, 1.25 m long. The effects of mass flux, heat flux, and saturation temperature on the heat transfer coefficient are also determined. The ranges of mass flux and heat flux are 200–400 kg/m2 s and 5–14.25 kW/m2, respectively. The experimental results were proposed, and the conclusions are as follows:
1.
The average heat transfer coefficient of R-410A during evaporation tended to increase with increasing average quality, mass flux, and heat flux, but tended to decrease with increasing saturation temperature.
2.
The pressure drop increased with increasing the mass flux, but decreased with increasing the saturation temperature, and the heat flux has no significant effect on the pressure drop.
3.
The correlation for predicting the average heat transfer coefficient and pressure drop during evaporation is proposed.
In this work, the heat transfer coefficient and pressure drop of R-410A is investigated. The test section is an aluminium multiport mini-channel having a hydraulic diameter of 3.48 mm, 1.25 m long. The effects of mass flux, heat flux, and saturation temperature on the heat transfer coefficient are also determined. The ranges of mass flux and heat flux are 200–400 kg/m2 s and 5–14.25 kW/m2, respectively. The experimental results were proposed, and the conclusions are as follows:1.The average heat transfer coefficient of R-410A during evaporation tended to increase with increasing average quality, mass flux, and heat flux, but tended to decrease with increasing saturation temperature.2.The pressure drop increased with increasing the mass flux, but decreased with increasing the saturation temperature, and the heat flux has no significant effect on the pressure drop.3.The correlation for predicting the average heat transfer coefficient and pressure drop during evaporation is proposed.
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