近零能耗建筑地面辐射供暖末端设计参数优化  

Optimization of Design Parameters for Ground Radiant Heating Terminal of Near-Zero Energy Buildings

作　　者：冯国会[1] 王茜如 黄凯良[1] 常莎莎[1] 崔航 FENG Guohui;WANG Xiru;HUANG Kailiang;CHANG Shasha;CUI Hang(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第3期512-519,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家重点研发计划政府间国际科技创新合作项目(2019YFE0100300);国家自然科学基金项目(51778376)。

摘　　要：目的研究近零能耗建筑地热盘管间距和供水温度之间的最佳匹配模式,解决地面辐射供暖末端参数设计不合理造成的室内温度过高、热泵机组能效偏低等问题。方法利用TRNSYS软件计算并分析近零能耗建筑热负荷特征,建立能源系统模型,分析末端参数对室内温度、热舒适、系统能耗的影响,对盘管间距和供水温度进行优化。结果近零能耗建筑利用土壤源热泵结合地面辐射供暖末端供热,当盘管间距200mm,热泵供水温度35℃,供暖季初期和末期室温偏高,热舒适性较差。供水温度不变,增大盘管间距至400mm,热舒适性提高。盘管间距不变,降低供水温度至30℃,热舒适性达到Ⅱ级。降低供水温度30℃与45℃相比热泵能效提升12.57%,能源系统供暖季总能耗降低145.5kW·h。结论近零能耗建筑供暖季热负荷比普通建筑低,可增大盘管间距为300~400mm,降低供水温度为30~35℃,使建筑的热舒适性提高,降低系统能耗。In order to solve the problems of excessively high indoor temperature and low energy efficiency of heat pump units caused by unreasonable design of ground radiant heating parameters,best matching mode between geothermal coil spacing and water supply temperature was studied for near-zero energy consumption buildings.The heat load characteristics of near-zero energy consumption buildings was calculated and analyzed by TRNSYS software.An energy model was established to analyze influence of terminal parameters on indoor temperature,thermal comfort,and system energy consumption,and optimize the coil spacing and water supply temperature.The results show that when the ground source heat pump combined with ground radiation heating terminal heating is used in nearly zero energy consumption buildings,when the coil spacing is 200 mm and the water supply temperature of the heat pump is 35℃,indoor temperature is high at the beginning and end of the heating season,and the thermal comfort is slightly poor.If the water supply temperature remains the same and the coil spacing is increased to 400 mm,the thermal comfort is improved.If the coil spacing remains the same and the water supply temperature reduced to 30℃,the thermal comfort can reachⅡgrade.When the water supply temperature drops to 30℃,the energy efficiency of the soil source heat pump increases by 12.57%compared with 45℃,and the total energy consumption of the energy system in heating season decreases by 145.5 kW·h.Heat load of near-zero energy consumption building in heating season is lower than that of ordinary buildings,the coil spacing can be increased to 300~400 mm,and the water supply temperature can be reduced to 30~35℃,which improves the thermal comfort of the building and reduces the energy consumption of the system.

关 键 词：近零能耗建筑 地面辐射供暖 TRNSYS模拟 热舒适 节能 

分 类 号：TU398.1[建筑科学—结构工程]