我们在学习外地经验的基础上,分别于1973和1979年设计试制成功了容量为300万大卡/小时的单双效溴化锂制冷机各一台。双效机组的主要技术数据如下:工作蒸汽为8公斤/厘米~2饱和蒸汽,冷却水为32℃,制出空调用冷水为10℃,进水为20℃。经测定当工作蒸汽为7.5公斤/厘米~2,耗汽量为5.5吨/小时,制冷量为290万大卡/小时,热力系数为0.95。它比单效机组节约能源 Based on our field experience, we designed and manufactured a trial version of single-and double-effect lithium bromide chillers with a capacity of 3 million kcal / hour in 1973 and 1979, respectively. The main technical data of the double-effect unit are as follows: working steam is 8 kg / cm ~ 2 saturated steam, cooling water is 32 ° C, air-conditioning cold water is 10 ° C and water is 20 ° C. It was determined that when the working steam is 7.5 kg / cm ~ 2, the steam consumption is 5.5 tons / hour, the cooling capacity is 2.9 million kcal / hour and the thermal coefficient is 0.95. It saves energy than single-effect units