摘要
针对传统毛细管辐射空调的毛细管末端采用水作为载冷剂,二次换热降低了能效且存在冬天冻坏管路等隐患,本文提出以制冷剂为载冷剂的多联干式毛细管辐射热泵系统,并搭建了实验台,对该机组进行在冬季工况下制热测试。在冷凝温度48℃时,分别测试了风管机制热和毛细管辐射制热时的室内温湿度和空气流速。并结合PMV-PPD热舒适评价指标,对比分析了这两种供暖末端的热舒适性。实验结果表明:多联干式毛细管辐射热泵系统冬季工况制热8 h长时间运行,室内温度场分布均匀,1.5 m处水平温差最大为0.56℃、垂直方向温差最大为0.37℃,在回油过程中降温小于1℃,相对湿度维持在60%~65%,PMV和PDD热舒适指标分别维持在-0.5~0、0~10%,满足Ⅰ级舒适标准,且各指标均优于风管机。
In traditional capillary radiation air conditioning systems,water is used as the coolantinthe terminalsof the capillary.However,the secondary heat transfer reduces the energy efficiency and freezing of pipes in winter is a potential danger.In this study,a multi-connected dry capillary radiation heat pump(MDCHP)with refrigerant as the cooling medium has been proposed.Thermal tests of the unit were undertaken in winter.Indoor dry and wet bulb temperature,and air velocity in heating mode were tested for ducted air conditioning unit and MDCHP respectively when the target condensation temperature was set to 48℃.The thermal comfort of the two heating terminals were compared and analyzed with the thermal comfort evaluation index of PMV-PDD.During an 8 h running period of the MDCHP,the indoor temperature field distribution was uniform,the maximum horizontal temperature difference at 1.5 m was 0.56℃,and the maximum vertical temperature difference was 0.37℃.During the process of oil return,the temperature drop was less than 1℃,the relative humidity was maintained at 60%-65%,and the thermal comfort index of PMV and PDD were maintained at-0.5-0.0 and 0%-10%,respectively.These results demonstrated that the MDCHP can achieve a First Class standard of thermal comfort and every comfort index was superior to that of ducted air conditioning unit.
作者
马小丹
王梦飞
蒲宇航
宋陈涛
庄丁丁
洪诗颖
周馨瑜
涂虬
Ma Xiaodan;Wang Mengfei;Pu Yuhang;Song Chentao;Zhuang Dingding;Hong Shiying;Zhou Xinyu;Tu Qiu(College of Architecture and Transportation Engineering,Ningbo University of Technology,Ningbo, 315211, China)
出处
《制冷学报》
CAS
CSCD
北大核心
2020年第3期102-110,共9页
Journal of Refrigeration
基金
浙江省基础公益研究计划项目(LGG19E060002)
宁波市重点公益项目(2019C10031)资助。
关键词
多联干式毛细管辐射热泵
风管机
室内热环境
预计平均热感觉指数(PMV)
预测不满意百分数(PPD)
multi-connected dry capillary radiation heat pump
air duct indoor unit
indoor thermal environment
predicted average thermal sensory index(PMV)
prediction of unsatisfactory percentage(PPD)
