湖水源热泵系统排热工况下散点排水对湖体温度场的影响  

Influence of Distributed Drainage on Reservoir Water Temperature Field Under Reservoir Water Source Heat Pump System

作　　者：陈金华[1] 袁娟娟[2] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆大学城市建设与环境工程学院,重庆400045

出　　处：《土木建筑与环境工程》2013年第2期79-85,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金重点项目(50838009);中美新能源洁净能源国际合作项目(2010DFA72740-05);重庆市科技攻关计划项目(CSTC 2011AC7129)

摘　　要：采用流体计算软件建立三维湖体模型,模拟设计日下湖体自然水温,用实测水温进行修正作为初始条件;根据别墅群全年逐时负荷的模拟结果,采用动态取排水温和水量作为边界条件;以典型气象年数据为基础,通过用户自定函数输入水面换热边界;分别对某别墅群水库水源热泵系统的排放水管网采用与雨水排水管网相结合的散点排水以及采用传统的集中排水方式进行了动态数值模拟,得到供冷季逐时排热工况下湖体温度场的分布情况,分散排水优势明显。分析模拟结果表明:集中排水方案水体周温升0.33℃,分散排水方案水体周温升0.16℃;水体水道狭长体积有限的区域在连续排水的情况下,有明显热累积现象。连续运行条件下,散点排水取水口水温的模拟结果表明:7～10月,位于常年水位4.6m水深下的取水口取水温度在27～23.5℃之间,可实现热泵系统高效运行。By adopting fluid calculation software to establish three-dimensional reservoir model and simulating reservoir＇s natural temperature on design day,the measured temperature was used to correct and treated as the initial condition.According to the annual hourly calculation load of villa-cluster,dynamic water temperature and flow were used as boundary conditions.Inputted water surface heat transfer conditions were identified by user-defined function based on the data of typical meteorological year.For the distributed drainage combining the discharge network and rainwater pipe network and traditional integrated drainage of reservoir water source heat pump system,dynamic numerical simulation of the water temperature field was conducted.The results show that water＇s temperature rises 0.33℃ weekly when integrated drainage is adopted and the temperature rises 0.16℃ when distributed drainage is adopted.There is obvious heat accumulation phenomenon when continuous drainage in narrow area works.The simulation of intake water temperature shows that below perennial water level 4.6m depth,the intake water temperature is between 27~23.5℃ from July to October,in which the heat pump system operates efficiently.

关 键 词：水源热泵 散点排水 数值模拟 动态负荷 温度分布 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]