| 摘要: |
| 为了提高大温差工况下空气源热泵系统的性能，本文提出一种三重回路空气源热泵系统的方案，并以回收建筑空调排风能量为基础，搭建了三重回路系统性能测试平台，实验测试了单回路与三重回路热泵系统在冬、夏季不同室外温度工况下的性能。结果表明：无论冬、夏季工况，三重回路系统在各工况下的整体性能均明显高于单回路系统，且随室内外温差的增大，三重回路系统可明显改善传统空气源热泵存在的压比过大、系统性能急剧降低等问题。冬季工况下，三重回路系统COP的增长率可达1.88，室内外温差为40 ℃时，三重回路比单回路COP提高54.8%；夏季工况下，三重回路COP增长率可达89.8%，室内外温差为13 ℃时，三重回路比单回路COP提高74.6%。 |
| 关键词: 空气源热泵 排风热回收 三回路系统 COP |
| DOI： |
| 投稿时间：2018-07-10 修订日期：2018-10-17
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| 基金项目:国家自然科学基金(51776004)资助项目。 |
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| Thermodynamic Performance Analysis of a Triple-loop Air-source Heat-pump Heat Recovery System |
|
Ma Anna, Ma Guoyuan, Wang Lei, Zhou Feng, Jiang Mingjian, Yan Xianghui
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| (College of Environmental and Energy Engineering, Beijing University of Technology) |
| Abstract: |
| To improve the performance of an air-source heat pump system under large temperature difference conditions, this paper proposed a triple-loop air-source heat pump system scheme. An energy recovery performance test platform was set up according to the exhaust energy recovery in a public building air-conditioning system. The performances of the single- and triple-loop heat-pump systems were tested through experiments under different outdoor-temperature conditions in winter and summer. The results show that the overall performance of the triple-loop system was significantly higher than that of the single-loop system under all operating conditions. With the increase in the indoor and outdoor temperature difference, the triple-loop heat pump system could significantly minimize the problems of excessive compression ratio and system performance degradation of the traditional air-source heat pump. Under winter conditions, the increase rate of the coefficient of performance (COP) of the triple-loop system reached up to 1.88. When the indoor and outdoor temperature difference was 40 ℃, the COP of the triple-loop system was 54.8% higher than that of the single-loop system. Under summer conditions, the increase rate of the COP of the triple-loop system reached 89.8%. When the indoor and outdoor temperature difference was 13 ℃, the COP of the triple-loop system was 74.6% higher than that of the single-loop system. |
| Key words: air source heat pump exhaust heat recovery triple-loop system COP |
