兰州地区土壤热物性参数计算及垂直U型管非稳态温度场模拟  

Thermophysical Property Calculation of Soil and Numeric Simulation of Unsteady Temperature Field of U-vertical Buried Pipe in Lanzhou Area

作　　者：赵霄强 刘智勇[1] 闫丹丽 吕雪涛 

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]中土集团福州勘察设计研究院有限公司,福建福州360001

出　　处：《兰州交通大学学报》2015年第1期146-150,共5页Journal of Lanzhou Jiaotong University

摘　　要：根据兰州地区土壤性质及气候特点,计算出马兰黄土的热物性参数.利用Fluent软件对垂直U型管与土壤之间的耦合换热进行非稳态数值模拟,得出夏季向土壤放热、冬季从土壤吸热两种工况下地埋管出水温度和总换热量的变化规律.结果表明:地埋管间距为4m时,土壤热交换系统可以满足热泵机组夏季使用要求,但不能满足冬季使用要求.According to the quality of soil and the characteristic of climate,thermophysical properties of Malan loess are calculated.By using Fluent software,the unsteady coupled heat transfer between the vertical U tube and the soil is simulated to investigate the laws for total heat exchange amount and outlet temperature when ground heat exchanger absorbing and releasing heat from the soil.The results show that the heat pump unit can be satisfied in summer by the ground heat exchanger system,but dissatisfied in winter when the distance between every U tube is 4m.

关 键 词：土壤源热泵 马兰黄土 非稳态 数值模拟 

分 类 号：TK523[动力工程及工程热物理—热能工程]