水源热泵系统应用对地下水环境的影响

Impact of water source heat pump system on groundwater environment

根据地下水动力学原理、热传递数值模拟技术和热泵系统场地地下水环境的实测数据,推导热泵系统运行过程中抽灌井群引起的地下水动力场范围,定量计算热泵运行起始期、建筑物年内冷热负荷失衡等情况的地温场变化,分析热泵系统运行对地下水水质、细菌的影响。结果表明:年内冷热负荷平衡有利于热泵系统的长期运行;当冷负荷大于热负荷时,热泵起始期应在冬季,反之,起始期应选在夏季;热泵系统运行过程中,对地下水水质影响不大,温度变化会抑制细菌的生长。

Based on the principles of groundwater dynamics, a numerical simulation technique of thermal transmission, and field measurement data of the groundwater environment in the field where the heat pump system was settled, the groundwater hydrodynamic field was determined when the pump-injection wells performed. The change of the geo- temperature field was quantitatively calculated during different performance periods, such as at the beginning of heat pump operation, and during the non-equilibrium state of cooling and heat loading inside the building throughout the year. The effect of heat pump operation on the groundwater quality and the bacteria was also analyzed. The results showed that a heat pump would perform for the long-term when the cool and warm load was in equilibrium. If the cool load was greater than the heat load, the initial operating period should be in winter. Otherwise, the initial performance period should be in summer. The heat pump performance had little effect on groundwater quality and restrained the growth of bacteria.