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首页> 外文期刊>Journal of Thermal Science and Technology >Entropy generation analysis in an evaporative air-cooled heat exchanger
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Entropy generation analysis in an evaporative air-cooled heat exchanger

机译：蒸发式空气冷却换热器中的熵产生分析

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In the present study, air-side entropy generation rate for an evaporative air-cooled heat exchanger has been investigated using thermodynamic second-law analysis. For this purpose, entropy generations due to heat transfer, friction loss and evaporation were taken into consideration. From the results of this study, it was observed that the total air-side entropy generation was increased by increasing the air-side Reynolds number. Actually, increasing of air mass flow rate, increases irreversibilities due to both evaporation and friction. Stepping up of ambient temperature leads to increasing of irreversibility due to water evaporation. The results showed when the ambient temperature approaches to inlet process fluid temperature, the contribution of the entropy generation rate due to water evaporation becomes the dominant term in the total entropy generation rate. Moreover, it was seen that the effect of deluge water mass flow rate changes on entropy generation rate is slight.
机译：在本研究中，已经使用热力学第二定律分析了蒸发式空气冷却热交换器的空气侧熵产生率。为此，考虑了由于传热，摩擦损失和蒸发而产生的熵。从这项研究的结果可以看出，通过增加空气侧雷诺数可以增加总的空气侧熵产生。实际上，空气质量流量的增加会由于蒸发和摩擦而增加不可逆性。由于水蒸发，环境温度的升高导致不可逆性增加。结果表明，当环境温度接近入口过程流体温度时，由水蒸发引起的熵产生速率的贡献成为总熵产生速率的主要项。此外，可以看出，洪水水质量流量变化对熵产生率的影响很小。

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