含冰率对冰源热泵系统性能的影响  

Influence on Performance and Operation Safety of Ice Source Heat Hump of Ice Packing Fraction

作　　者：胡志高 吴涛 朱娜[2] 胡平放[2] 罗振宇 徐连 唐广 吴一鸣 HU Zhi-gao;WU Tao;ZHU Na;HU Ping-fang;LUO Zhen-yu;XU Lian;TANG Guang;WU Yi-ming(Hubei Fenshen Air-conditioning Cleaning Equipment Engineering Co.,Ltd,Wuhan 430070,China;School of Environment Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]湖北风神净化空调设备工程有限公司,武汉430070 [2]华中科技大学环境科学与工程学院,武汉430074

出　　处：《建筑节能（中英文）》2022年第5期41-47,共7页Building Energy Efficiency

摘　　要：基于现有地表水源热泵系统在冬季水源温度过低容易导致主机蒸发器结冰的问题,提出了一种新型的冰源热泵系统,介绍了过冷水法制取冰浆的工作原理和动态制冰装置的结构,分析了冰浆含冰率对冰源热泵系统性能和运行安全的影响。通过理论分析获得过冷水温度与冰浆含冰率的函数关系,使用Fluent软件模拟水平直管中的冰浆流动特性。综合考虑两种临界流速判断依据,获得管道安全运输不同含冰率冰浆的临界流速以及压降变化,研究了管径对临界流速的影响。建立TRNSYS模型研究含冰率对冰源热泵系统供热季性能的影响。结果表明,在含冰率1%~10%的范围内,临界流速呈略微下降的趋势;当水源回水温度等于-2.5℃时,相应的含冰率为3.42%,系统供热季平均COP达到最高3.0。A new type of ice source heat pump system is proposed based on problem that the water source temperature is too low to cause the evaporator frozen of the existing surface water source heat pump system in winter.The operating principle of ice slurry production by supercooled water method and the structure of dynamic ice making device are introduced.The influence of ice packing fraction on the performance and operation safety of ice source heat pump system is analyzed.The functional relationship between supercooled water temperature and ice packing fraction of slurry is analyzed and Fluent software is used to simulate the flow characteristics of ice slurry in horizontal straight pipe.The critical velocity and pressure drop of ice slurry with different ice packing fraction are obtained by combining two different judgment criteria.Meanwhile,the influence of pipe diameter on critical velocity has been considered.A TRNSYS model is established to carry out the effect of ice packing fraction on the performance of ice source heat pump system in heating season.The results indicate that the critical velocity decreases slightly in the range of 1%to 10%ice packing fraction.When the return water temperature is-2.5℃,the corresponding ice packing fraction was 3.42%,and the average COP reaches the peak value of 3.0 in heating season.

关 键 词：冰源热泵 含冰率 输运安全 临界流速 COP 

分 类 号：TU833.3[建筑科学—供热、供燃气、通风及空调工程]