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本文针对三套管蓄能型太阳能与空气源热泵集成系统建立了实验台,通过实验验证了这一新型系统在蓄冷模式下的运行特性。在蓄冷模式下,压缩机的蒸发压力和冷凝压力变化平缓,压缩比在3～3.6之间;系统换热效果良好,运行稳定。另外,实验还验证了三套管蓄能换热器作为蓄能装置的蓄能能力。在实验测得了冷凝热量和压缩机耗功的基础上,通过计算得到了蓄冷量,这一参数值与随后进行的取冷实验的取冷量之间可以满足能量守恒定律。在整个实验过程中,压缩机的COP在2.02～2.79之间,证明了三套管蓄能型太阳能与空气源热泵集成系统在蓄冷模式下可以安全、可靠地运行。
In this paper, a test bench is set up for the integrated system of three-tube solar energy storage system and air source heat pump. The operating characteristics of the new system in cold storage mode are verified by experiments. In the storage mode, the compressor evaporation pressure and condensing pressure changes gently, the compression ratio is between 3 to 3.6; system heat transfer effect is good, stable operation. In addition, the experiment also verifies the storage capacity of the three-tube accumulator heat exchanger as a storage device. On the basis of experimentally measured condensing heat and compressor work efficiency, the accumulative cooling capacity is obtained by calculation. This parameter value can satisfy the law of conservation of energy with the cooling capacity of the subsequent cooling experiment. Throughout the experiment, the COP of the compressor was between 2.02 and 2.79, which proved that the integrated system of three bushing energy storage solar and air source heat pump can operate safely and reliably in cold storage mode.