哈尔滨季节性土壤蓄冷不同蓄冷模式

杨涛^1,2, 郑茂余¹, 王潇¹, 张小松²

1.哈尔滨工业大学市政环境工程学院;2.东南大学能源与环境学院



摘要:

为降低夏季空调能耗,减少土壤源热泵系统初投资,提出自然冷源季节性土壤蓄冷系统,建立季节性土壤蓄冷垂直U型埋管和室外空气换热器的非稳态传热模型.引入显热容模型对哈尔滨地区系统的运行特性进行模拟计算,研究5种不同蓄冷模式,得出不同模式下系统的蓄冷量、预蓄冷时间、释冷量、释冷温度、COP值以及埋管周围土壤的温度场.模拟结果显示系统的COP值在9.92～14.15,节能效果显著,释冷温度和释冷量可满足空调需要,证明该系统应用于严寒地区是可行的.

关键词:  土壤蓄冷  土壤释冷  蓄冷量  释冷量

DOI：10.11918/j.issn.0367-6234.2010.10.022

分类号:TU831.6

基金项目:黑龙江省重点科技攻关项目(2006G1662-00)



Different modes of seasonal soil cold storage in Harbin

YANG Tao^1,2, ZHENG Mao-yu¹, WANG Xiao¹, ZHANG Xiao-song²

1.School of Municipal and Environmental Engineering,Harbin institute of Technology,Harbin 150090,China;2.School of Energy and Environment,Southeast University,Nanjing 210096,China)

Abstract:

To reduce the energy consumption of air-conditioning in summer and the initial investment of ground source heat pump,a novel seasonal soil cold storage system with natural energy is presented,and the transient heat transfer models of vertical U-tube and outdoor air exchanger are developed.The operating process of this system in Harbin is calculated using the sensitive heat capacity model.Five cold-storing modes are studied,and the cold-storing capacity,preliminary cold-storing time,cold-extracting capacity,cold-extracting temperature,COP and soil temperature field around tube under different modes are obtained.Simulation results show that the COP of system changes from 9.92 to 14.15,which indicates the notable energy-saving effect.The cold-extracting temperature and cold-extracting capacity can satisfy the needs of air-condition,and it is proved to be feasible for the application of the presented system in the cold area.

Key words:  soil cold storage  soil cold extraction  cold-storing capacity  cold-extracting capacity