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Numerical and experimental investigations on heat transfer performance of the refrigerant-heated radiator

机译：制冷剂加热辐射器传热性能的数值和实验研究

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摘要

The refrigerant-heated radiator (RHR) has been proved to be an efficient refrigerant-heated terminal of the air-source heat pump (ASHP) for space heating. The evaluation and analysis of the RHR heat transfer performance are of importance to the design and operation analysis of the heating system. In this paper, to investigate the heat transfer performances of the RHR, the detailed mathematical model considering the heat transfer and pressure drop of the RHR was established. Meanwhile, the experimental RHR heating system are conduct to verify the superiority of the system COP and validate the proposed mathematical model. The results showed that the simulation errors of radiator outlet temperature, pressure drop and heat transfer capacity ranged from - 2.3 degrees Cto 2.5 degrees C, -11.1% to 13.5% and -4.35% to 3.43%, respectively. Based on the RHR model, the characteristics of the RHR and the parametric analysis of the radiator heat transfer performances were investigated. The results indicated that the proportion of radiation heat transfer of the RHR is increased by 80-100% in comparison with other radiant-convective terminals. And the refrigerant flow rate, condensation temperature and indoor air temperature were the three main parameters affecting the heat transfer performance of the RHR.
机译：制冷剂加热的散热器（RHR）被证明是空气源热泵（ASHP）的高效制冷剂加热端子，用于空间加热。 RHR传热性能的评估和分析对加热系统的设计和操作分析非常重要。在本文中，为了研究RHR的热传递性能，建立了考虑RHR热传递和压力下降的详细数学模型。同时，实验RHR加热系统是为验证系统警察的优越性并验证所提出的数学模型的行为。结果表明，散热器出口温度，压降和传热能力的模拟误差为-2.3摄氏度2.5℃，-11.1％至13.5％，分别为-4.35％至3.43％。基于RHR模型，研究了RHR的特性和散热器传热性能的参数分析。结果表明，与其他辐射 - 对流终端相比，RHR的辐射热传递比例增加了80-100％。和制冷剂流速，冷凝温度和室内空气温度是影响RHR传热性能的三个主要参数。

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