为了提升热泵采暖系统的运行能效,提出一种强制对流散热器作为热泵的室内末端。以某典型办公室为例,在实测研究的基础上,采用CFD模拟该散热器营造的室内热环境状况,并在考虑热舒适性约束的前提下,以最大化节能潜力为优化目标,对强制送风速度和散热器表面温度进行同步优化。研究发现,送风速度和表面温度对室内热环境的影响具有耦合性。为避免人体吹风感,可在散热器出风口处安装导流罩。优化获得的送风速度为1.2~1.9 m/s,对应的散热器表面温度为41~45 ℃,表明该技术可带来较为显著的节能效益。
Abstract
To improve the operating efficiency of the heat pump heating systems, this paper proposed a forced convection-based radiator as the indoor terminal of heat pump. On the basis of actual measurements, this paper used CFD to simulate the indoor thermal environment created by forced convection radiators in a typical office. With the goal of maximizing the energy saving potential, the air supply velocity and the surface temperature of the radiator were optimized simultaneously considering thermal comfort constraints. The study indicates that the effect of air supply velocity and surface temperature on the indoor thermal environment were coupled. To effectively avoid the human body wind feeling caused by forced air supply, installing a baffle at the air outlet of the radiator was recommended. The optimized radiator surface temperature is 41-45 ℃ with the air supply velocity in the range of 1.2-1.9 m/s, indicating that the proposed technology can lead to significant energy benefits.
关键词
计算流体力学 /
热泵系统 /
散热器 /
供暖 /
能效 /
强制对流
Key words
computational fluid dynamics /
heat pump system /
radiators /
space heating /
energy efficiency /
forced convection
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基金
国家自然科学基金（51808372）; 山西省科技合作交流专项（202104041101025）; 山西省科技重大专项计划“揭榜挂帅”项目（202101060301015）
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