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首页> 外文期刊>International Journal of Heat and Mass Transfer >Dynamics of plate heat exchangers subject to flow variations
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Dynamics of plate heat exchangers subject to flow variations

机译：板式换热器的动态变化

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摘要

A predictive model has been presented to suggest the transient response of plate heat exchangers, subjected to a step flow variation. The work also brings out the effect of the port to channel maldistribution on the performance of plate heat exchangers under the condition of flow variation. The results indicate that flow maldistribution affects the performance of the plate heat exchangers in the transient regime. A wide range of the parametric study has been presented which brings out the effects of NTU and heat capacity rate ratio on the response of the plate heat exchanger, subjected flow perturbation. To verify the presented theoretical model, appropriate experiments have been carried out. Experiments include the responses of the outlet temperatures subjected to inlet temperature transient in the circuit followed by a sudden change in flow rate in one of the fluids. Simulated performance has been compared to the performance measured in the experiments. Comparisons indicate that theoretical model developed for flow transient is capable of predicting the transient performance of the plate heat exchangers satisfactorily, under the given conditions of changed flow rates.
机译：提出了预测模型，以建议板式换热器在阶跃流量变化下的瞬态响应。这项工作还揭示了在流量变化的情况下，端口到通道分配不均对板式换热器性能的影响。结果表明，流量分布不均会影响板式换热器在过渡状态下的性能。进行了广泛的参数研究，得出了NTU和热容量率比对板式换热器的响应以及流动扰动的影响。为了验证所提出的理论模型，已经进行了适当的实验。实验包括出口温度对回路中入口温度瞬变的响应，然后是其中一种流体的流量突然变化。已将模拟性能与实验中测得的性能进行了比较。比较表明，在给定的流量变化条件下，为流动瞬态建立的理论模型能够令人满意地预测板式换热器的瞬态性能。

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