摘要
建立了闭式湖水源热泵系统的数学模型,根据逐时负荷与逐时气象参数对位于长沙的某闭式湖水源热泵系统的动态特性进行模拟,分析了封闭水体的深度和面积对制冷及制热工况下机组进液温度的影响。分析结果表明:在其他条件不变的情况下,增加水体的深度对系统的供冷性能有利,对系统的供热性能反而不利;增加水体的面积对提高系统供冷性能的作用较小,对提高系统供热性能的作用较大。在一些与长沙气候类似的地区应用闭式湖水源热泵系统时,只要换热盘管长度适当,换热流体可以不采用防冻液。
A mathematical model for closed-loop lake water heat pump systems was developed. Dynamic simulation for a closed-loop lake water heat pump system in Changsha was performed according to the hourly load and the hourly weather data. The impacts of the lake depth and lake area on the entering fluid temperatures were analyzed, respectively, through the simulation. Simulation results show that the increase of lake depth would be favorable for the performance in cooling mode, but unfavorable for the performance in heating mode if all the other conditions remained unchanged. The increase of lake area would be more favorable for the performance in heating mode than for the performance in cooling mode based on the premise that all the other conditions remained unchanged. Antifreeze would be unnecessary for some cities whose weather condition is similar to Changsha as long as the heat exchanger size was adequate.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2010年第11期1452-1457,共6页
Acta Energiae Solaris Sinica
基金
湖南省科技计划项目(2009GK3073)
湖南省建设科技计划项目(200916)
国家科技支撑计划项目(2007BAB21B02)
关键词
夏热冬冷地区
闭式湖水源热泵系统
特性分析
换热流体
hot summer and cold winter zone
closed-loop lake water heat pump system
performance analysis
heat transfer fluid
