西北地区太阳能采暖系统储热水箱热损失试验研究  

Experimental study of heat loss of heat storage tank in solar heating system of northwest region

作　　者：李金平[1,2,3] 刘润 崔维栋 黄娟娟[1,2,3] 王春龙[1,2,3] LI Jin-ping;LIU Run;CUI Wei-dong;HUANG Juan-juan;WANG Chuan-long(China Western Energy and Environment Research Center,Lanzhou Univ.of Tech.,Lanzhou 730050,China;China Northwestern Collaborative Innovation Center of Low-carbon Urbanization Technologies,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Key Laboratory of Complementary Energy System of Biomass and Solar Energy of Gansu Province,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学西部能源与环境研究中心,甘肃兰州730050 [2]兰州理工大学西北低碳城镇支撑技术协同创新中心,甘肃兰州730050 [3]兰州理工大学甘肃省生物质能与太阳能互补供能系统重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2020年第4期67-72,共6页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51676094);甘肃省国际科技合作专项(1604WKCA009);甘肃省自然科学基金(1508RJYA097);兰州市人才创新创业项目(2017-RC-34)。

摘　　要：以西北新农村117.07 m^2的单体建筑太阳能采暖系统为研究对象,以12月15日为例,得出储热水箱热损失主要发生在自然冷却阶段,当日储热水箱的总热损系数为5.68 W/℃,总热量损失为9.49 MJ.再选取其余11个典型日的试验数据对储热水箱总热损系数和总热损失各影响因素进行拟合,储热水箱总热损失由于受到环境温度和室外风速的影响,储热水箱的温度也随之变化.研究结果表明:平均环境温度每降低1℃,储热水箱总热损失增加0.067 MJ;室外风速每增加1 m/s,储热水箱总热损失增加0.042 MJ;储热水箱平均温度每降低1℃,储热水箱总热损失增加0.068 MJ;储热水箱温度变化幅度每增加1℃,储热水箱总热损失增加1.641 MJ.针对储热水箱热损失分析及室内热环境现状,提出将储热水箱置于室内以增强储热水箱储热能力和改善建筑室内舒适度.Taking the solar heating system in an 117.07 m^2 northwest China as investigation object and the day of December 15 th as an example,it is concluded that the heat loss of heat storage tank occurs mainly during the natural cooling period,the total heat loss of the heat storage tank is 9.49 MJ when its daily total heat loss coefficient is 5.68 W/℃.Then the test data of other 11 typical days is chosen to carry out the fitting of several factors of influence on total heatloss coefficient and total heat loss of the heat storage tank.It is shown that the total heat loss of the heat storage tank will be influenced by the ambient temperature and outdoor wind speed,leading to the change of the temperature of the heat storage tank.Decrease of every 1℃of average ambient temperature will increase the total heat loss of heat storage tank by 0.067 MJ and the increase of every 1 m/s of outdoor wind speed will increase the total heat loss of the heat storage tank by 0.042 MJ,The increase of temperature of 1℃of heat storage tank will increase the total heat loss of heat storage tank by 0.068 MJ.The increase of the temperature of 1℃of heat storage tank will increas the total heat loss of the heat storage tank by 1.641 MJ.Aimed at the analysis of heat loss of heat storage tank and the present situation of indoor thermal environment,it is presented that a suggestion on indoor location of heat storage tank can be taken into consideration to enhance the heat storage capacity of heat storage tank and improve the indoor comfortableness of the building.

关 键 词：单体建筑 太阳能采暖系统 储热水箱总热损系数 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]