直接受益窗与光伏驱动电热膜地板组合式供暖技术性能*
Heating performance of combined heating system with direct-gain windows and photovoltaic driven electrothermal film heating floors
摘要：
针对传统高原被动太阳能建筑夜间室内温度较低的问题，提出了一种直接受益窗与光伏驱动电热膜地板组合式供暖技术。实际工程动态仿真模拟研究结果表明：典型房间全天室内空气温度为17.0~23.2 ℃，地板表面温度为21.0~26.0 ℃，可满足舒适性要求；光伏特朗勃墙技术可提升室内空气温度1.5~3.2 ℃，可提升地板表面温度1.8~2.5 ℃；对于冬季典型日，直接受益窗单位面积日累计净得热量为1.487 kW·h/m2，光伏特朗勃墙单位面积日累计净得热量为0.900 kW·h/m2，被动太阳能建筑应尽量增加直接受益窗面积以提高集热量；建筑耗热量中，新风耗热量占60%，非透明围护结构传热量仅占6%，墙体保温对建筑性能进一步提升作用有限，控制新风渗透应作为建筑热性能提升的主要方向。
Abstract：
Aiming at the problem of low indoor air temperature in traditional plateau passive solar buildings at night, proposes a combined heating system with direct-gain windows and photovoltaic driven electrothermal film heating floors. The dynamic simulation results of a practical engineering show that the indoor air temperature of typical rooms is 17.0-23.2 ℃ and the floor surface temperature is 21.0-26.0 ℃, which can meet the comfort requirement. The photovoltaic Trombe wall technology can increase indoor air temperature by 1.5-3.2 ℃ and the floor surface temperature by 1.8-2.5 ℃. For a typical day in winter, the daily accumulated net heat gain per unit area of the direct-gain window is 1.487 kWh/m2, and the daily accumulated net heat gain per unit area of the photovoltaic Trombe wall is 0.900 kWh/m2. The area of the direct-gain window should be increased as much as possible to improve the heat collection of the passive solar energy buildings. Among the total building heat consumption, the heat consumption of outdoor air accounts for 60% and the heat transmission of non-transparent enclosure only accounts for 6%. The wall insulation has limited effect on further improving the building performance, and controlling the penetration of outdoor air should be the main method of improving the building thermal performance.
Keywords:electrothermal film heating floor, photovoltaic Trombe wall, direct-gain window, heat storage, simulation