An experimental study on a novel radiant-convective heating system based on air source heat pump
An experimental study on a novel radiant-convective heating system based on air source heat pump
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基于空气源热泵的新型辐射对流供暖系统实验研究
DOI：
10.1016/j.enbuild.2017.10.065
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发表时间：
2018-01-01
影响因子：
6.7
通讯作者：
Huang, Shun
中科院分区：
文献类型：
--
作者：
Dong, Jiankai;Zhang, Long;Huang, Shun
空气源热泵由于其结构简单、造价低廉，在世界各地得到了广泛的应用。为了节约供暖能耗，改善室内热环境，提高热泵机组的性能已成为相关领域的研究热点之一。目前，空气源热泵系统最常用的供暖方式是采用翅片管换热器与风机相耦合的方式，这种方式在对流供暖时会产生强烈的吹风感和干眼症，使用户感到不舒适。另一方面，辐射供暖由于其舒适的室内热环境而受到越来越多的关注。本文提出了一种新型的辐射对流供暖终端，并将其耦合到空气源热泵系统中。对该系统的运行特性和供热性能进行了实验研究。实验结果表明，在标准供热工况下，新型系统进入稳定运行阶段的时间约为28 min，此时新型供热终端的辐射板表面温度、出风温度和系统性能系数分别为40.9 ℃、32.1 ℃和3.11。此外，当室外空气温度从-4.0 ℃增加到10.0 ℃时，上述所有参数都呈线性增加，并且室外空气温度每增加一次，它们各自的上升率分别为0.41 ℃、0.28 ℃和0.04 ℃。此外，实验结果还表明，调节室内空气流量可以有效地分配不同传热方式产生的热量，对室内热环境有显著影响。(C)2017爱思唯尔B. V.保留所有权利。
Air source heat pump (ASHP) has been widely applied to many parts of the world due to its simple structure and low initial cost. To save energy consumed for spacing heating and enhance the indoor thermal environment, improving the performances of ASHP has become one of the research focus in the relevant field. Currently, the most conventional heating terminal of ASHP system for spacing heating is finned tube heat exchanger coupled with air fan, which may cause strong draught sensation and dry eye problem and make users feel uncomfortable during convective heating. On the other hand, radiant heating is attracting more and more attention due to its comfortable indoor thermal environment. In this paper, a novel radiant-convective heating terminal was presented and coupled into an ASHP system. Both the operating characteristics and heating performances of the novel system were experimentally investigated. The experimental results showed that the novel system took about 28 min to enter a steady operating stage, during which the radiant panel surface temperature and outlet air temperature for the novel heating terminal, and COP of the novel system were 40.9 degrees C, 32.1 degrees C, and 3.11, respectively, under a standard heating condition. In addition, all parameters mentioned above saw a linear increase when the outdoor air temperature increased from -4.0 to 10.0 degrees C, and their respective rising rates were 0.41 degrees C, 0.28 degrees C and 0.04 per increased outdoor air temperature. Furthermore, the experimental results also demonstrated that adjusting the indoor air flow rate could effectively allocate the amount of heat generated by different heat transfer modes, which may have significant effects on the indoor thermal environment. (C) 2017 Elsevier B.V. All rights reserved.