冷水墙空调系统在建筑中的应用研究

Study on the Application of a Chilled Water Wall Cooling System in Buildings

冷水墙空调系统具备降温和除湿功能,可以作为常规的辐射式空调系统的替代品。本文基于边界层热湿耦合传递机理建立了冷水墙空调系统的理论模型,并将该模型编译到Energy Plus能耗模拟软件中。然后选取19个不同工况,对冷水墙空调系统的制冷量和除湿量进行了测试,以验证冷水墙理论模型。对于大多数测试工况,冷水墙空调系统的制冷量和除湿量的测试值与模拟值之间的相对误差分别在10%和20%以内。最后,本文利用Energy Plus建立一测试工况,将冷水墙空调系统和风机盘管系统进行对比,仿真结果表明,冷水墙空调系统具备较好的除湿和辐射制冷能力,在保证热舒适的前提下,可以通过增加室内空气温度的设定值来降低空调系统能耗。

Chilled water wall system,with its ability of cooling and dehumidification,is an alternative to the common radiant cooling system.Based on the basic principles of coupled heat and moisture transfer on boundary layer,a chilled water wall model was derived and implemented into EnergyPlus.The cooling capacity and dehumidification rate of the chilled water wall prototype were measured under 19 operating conditions to validate the proposed chilled water wall model.The relative differences between the measured and simulated total cooling rates and dehumidification rates were within 10%and 20%respectively for most of the measured conditions.A test case was simulated in EnergyPlus to compare the chilled water wall system and chilled water coil system.The simulation results show that the chilled water wall system not only has satisfactory dehumidification and radiant cooling effects,but also reduces the energy consumption by increasing the setpoint temperature of the indoor air,while guaranteeing the thermal comfort.