电驱动自由活塞斯特林热泵性能实验研究

Experimental Study of the Performance of an Electrically-driven Free-piston Stirling Heat Pump

热泵供暖技术能够有效减少燃煤取暖产生的能源消耗和环境污染,但目前常用的热泵供暖系统的低温适应性较差,难以满足寒冷地区的供暖需求。考虑到斯特林热泵技术具有十分广泛的可用温区,本文研制了一台电驱动自由活塞斯特林空气源热泵,旨在考察其在不同气候条件下的供热性能。实验结果表明,在普通、寒冷和极寒地区供暖工况下,电驱动自由活塞斯特林热泵的整机制热性能系数分别达到了2.31、1.97和1.78。随泵热温差增大,斯特林热泵的相对卡诺效率逐渐升高,其在大泵热温差下优势更加明显。

Heat pump heating technology can effectively reduce the energy consumption and environmental pollution caused by coal-fired heating.However,the low-temperature adaptability of commonly used heat pump heating systems is poor,making it difficult to meet the heating demand in cold regions.Considering that Stirling heat pump technology has a wide range of available temperature zones,an electrically-driven free-piston Stirling air source heat pump is developed in this paper to investigate its heating performance under different climatic conditions.The experimental results show that the overall coefficient of performance of the Stirling heat pump reaches 2.31,1.97 and 1.78 for normal,cold and very cold regions,respectively.In addition,the relative Carnot efficiency of the Stirling heat pump gradually increases with rising heat-pumping temperature difference.Its advantage is more obvious at large heat-pumping temperature difference.