半嵌套式围护结构耦合地热交换器参数优化研究

Design Parameter Optimization of Semi-Nested Building Coupled with Earth-to-air Heat Exchanger

本文将半嵌套式围护结构与地热交换器进行耦合,来调节室内空气温度。以位于夏热冬冷地区的上海市为例,利用TRNSYS进行建模和仿真。采用全因子实验对地热交换器的关键几何参数管长,管内直径,空气夹层间距和管内风速进行了分组数值模拟,得出了考虑室内不舒适度时数及建筑能耗下的最优设计参数,分别为管长50 mm,管内直径240 mm,空气夹层间距240 mm以及管内风速1m/s。

In this paper,the semi nested enclosure is coupled with the geothermal exchanger to regulate the indoor air temperature.Taking Shanghai in hot summer and cold winter area as an example,TRNSYS is used for modeling and simulation.The key geometric parameters(pipe length,pipe diameter,air interlayer spacing and wind speed) of earth-to-air heat exchanger were simulated by full factor experiment.The optimal design parameters of the pipe length,inner diameter,air-gap distance and air velocity were found to be 50 m,240 mm,300 mm and 1 m/s,respectively.