水分迁移对土壤蓄冷系统影响研究  

RESEARCH ON INFLUENCE OF MOISTURE MIGRATION ON SOIL COLD STORAGE SYSTEM

作　　者：杨涛[1,2] 张小松[1] 郑茂余[3] 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]南京丰盛新能源科技股份有限公司,南京210012 [3]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《太阳能学报》2013年第4期676-683,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金项目重点(51036001)

摘　　要：结合蓄冷技术和土壤源热泵埋管换热器的优点,提出土壤蓄冷系统,基于薄膜水迁移理论,建立土壤蓄冷垂直U型埋管管群内、外层埋管的水热耦合数学模型。通过模拟计算,对在有无水分迁移作用下的蓄冷、释冷运行结果进行比较,并研究埋管周围土壤水分场及日释冷量变化。在水迁移作用下,内、外层埋管释冷量为47.72W/m和35.12W/m,提高了10.09%和3.66%,系统COP为10.73和7.90,提高了0.98和0.28,水迁移作用对系统影响不可忽略。Combined with the advantages of cold storage and ground-coupled heat pump soil exchanger, a soil cold storage system was presented. Based on the film theory of moisture migration,the mathematical model of the mois-ture-heat coupling was established for the inner and outer suits of soil cold storage and cold extraction with/without tube in the vertical U-tube bundles. The operational re-moisture migration were comparedby by simulation, and the water content around the tube and the total daily charged quantities were studied. Due to moisture migration from unfrozen soil to the frozen soil, charged quantities of the inner and outer tube were 47. 72W/m and 35.12W/m, increasing by 10.09% and 3.66% , and COPs of them are 10.73 and 7.90, increasing by 0.98 and 0.28, respectively. The effect moisture on the system can not be neglected.

关 键 词：水分迁移 水热耦合 土壤蓄冷 土壤释冷 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]