water-loop heat pump systems 水环热泵空调系统
Solar energy is inexhaustible energy. If we add it to the traditional water-loop heat pump systems, it can play a significant energy saving effect to the fundamental purpose of transformation.
太阳能是取之不尽，用之不竭的能源，加入到传统的水环热泵空调系统当中势必会起到明显的节能效果，达到节能改造的目的。
The results show that the total annual cost of water loop heat pump system is the minimum among the six systems, which is the optimal option under the given conditions.
结果表明，在所选择的六种方案中，水环热泵系统的费用年值最小，是一种最为经济的户式中央空调系统形式；
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