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为对供热水箱容积、供热水箱控制最低水位、补水泵流量、集热水箱放水温度等关键参数进行系统优化,建立典型的双水箱太阳能集中热水系统仿真模型,以太阳能保证率和集热效率为主优化指标。结果表明:部分工况下供热水箱容积的增大会引起太阳能保证率的增大,但集热器的集热效率会有所减小;对于供热水箱通过水位控制的双水箱太阳能集中热水系统,建筑类型对系统补水泵流量的影响较大;对于集热水箱到供热水箱的热水通过温差控制的热水系统,放水温度应大于用户用水温度;双水箱太阳能集中热水系统,更适于24 h连续供水的建筑类型。
In order to systematically optimize the key parameters such as the volume of the hot water tank, the lowest water level in the hot water tank, the flow of the make-up water pump and the water release temperature of the hot water tank, the simulation model of the typical double-water tank solar hot water system is established. Thermal efficiency-based optimization. The results show that the increase of the volume of the hot water tank under some operating conditions will lead to the increase of the solar energy guaranteed rate, but the collector efficiency of the collector will be reduced. For the double-tank solar hot water system with the water level controlled by the hot water tank , The type of building has a greater impact on the flow of the system make-up pump; for hot water from the hot water tank to the hot water tank through the temperature control of the hot water system, the discharge temperature should be greater than the user’s water temperature; Suitable for 24 h continuous water supply type of construction.