Energy and Buildings ( IF 6.7 ) Pub Date : 2020-09-07 , DOI: 10.1016/j.enbuild.2020.110446 Suola Shao , Huan Zhang , Shijun You , Yaran Wang , Yonggang Li
The refrigerant-heated radiator (RHR) is an efficient and feasible heating terminal for space heating. In order to improve the efficiency of RHR, a multi-panel RHR was proposed in this paper. To investigate the thermal potentials of the multi-panel RHR, a heat transfer and pressure drop model of the multi-panel RHR was established. To predict the refrigerant flow distribution of the multi-panel RHR effectively, a hydraulic model was established. Combining the hydraulic model with the heat transfer and pressure drop model, a comprehensive mathematical model of the multi-panel RHR was set up. The feasibility and effectiveness of the mathematical model were validated with experimental data. The thermal potential of the multi-panel RHR was investigated with the mathematical model. The results indicated that the ratio of radiation to convection of the multi-panel RHR is 10.2%. Meanwhile, the refrigerant flow rate that makes the outlet refrigerants of all panels in the supercooled region is limited. Once the refrigerant flow rate reaches the limit value, the pressure drop of the RHR will increase rather than the heating capacity. Therefore, the predictions of the limited flow rate of RHR under different condensation temperatures are conducted, and relevant regressions can be extended to the RHR with more panels.
中文翻译:
基于考虑制冷剂流量分布的数学模型预测多面板制冷剂加热散热器的热势
制冷剂加热的散热器(RHR)是用于空间加热的高效可行的加热终端。为了提高RHR的效率,本文提出了一种多面板RHR。为了研究多面板RHR的热势,建立了多面板RHR的传热和压降模型。为了有效预测多面板RHR的制冷剂流量分布,建立了水力模型。将水力模型与传热和压降模型相结合,建立了多面板RHR的综合数学模型。实验数据验证了该数学模型的可行性和有效性。用数学模型研究了多面板RHR的热势。结果表明,多面板RHR的辐射对流比为10.2%。同时,限制了过冷区域中所有面板的出口制冷剂的制冷剂流量。一旦制冷剂流量达到极限值,RHR的压降将增加而不是加热能力增加。因此,进行了在不同冷凝温度下RHR有限流量的预测,并且可以通过更多面板将相关回归扩展到RHR。