一些奶牛场所消耗的电能,约一半以上是用于冷却牛奶或热水。例如,美国一个中等大小的奶牛场,每头乳牛每天就得使用8公升的热水。近年来由于能源短缺,有些奶牛场开始去掉热水设备,并同时提高冷却效率,通常可节省热水费用10—30%。其作法是在牛奶冷却器旁侧,以致冷剂吸收热,使其由液态变成气态,压缩后经过冷 About half of the electricity consumed by some dairy farms is used to cool milk or hot water. For example, a medium-sized dairy farm in the United States uses 8 liters of hot water per cow per day. In recent years, due to energy shortages, some dairy farms have begun to remove hot water equipment and at the same time improve cooling efficiency, usually saving 10-30% of hot water costs. It is practiced on the side of the milk cooler, where the refrigerant absorbs heat and changes it from a liquid state to a gaseous state, and after compression it is cooled.