带热回收的氨制冷雪橇雪道制冰系统的性能分析

Performance Analysis of the Ice-making System with Heat Recovery Via Ammonia Cooling for Sleigh Track

针对2022年北京冬奥会延庆地区的雪橇雪道氨制冷循环进行性能分析。研究单独制冷、制冷+热泵辅助热回收两种循环方式的运行性能。研究结果表明,在单独制冷模式下,随着冷凝温度的升高,系统的制冷性能下降;在制冷+热泵辅助热回收模式下,利用回收的热量将冷水预热,当冷凝温度为30℃时,系统综合COP可达到5.46;并且以系统冷凝温度30℃蒸发温度-18℃为例,进行经济性分析,表明回收冷凝热制取生活用水所需的费用仅为热泵直接加热热水的40%。

In this paper, the performance analysis of the refrigeration system of the toboggan runway in the Yanqing area of the Beijing Winter Olympic Games in 2022 is carried out. The operating performance of the system under the two modes of refrigeration, refrigeration and heat pump assisted hot water is studied. The results show that in the single cooling mode, the cooling performance of the system decreases with the increase of the condensing temperature. In the cooling + heat pump auxiliary heat recovery mode, the recovered heat is used to preheat the cold water and when the condensing temperature is 30℃. The system comprehensive COP can reach 5.46;the system condensing temperature 30℃ evaporation temperature-18℃ as an example, economic analysis shows that the cost of recovering condensing heat to prepare domestic water is only 40% of the heat pump directly heating hot water.