用于房屋取暖的太阳能热转换系统卵石层热特性的实验研究(英文)  

Experimental study on the thermal characteristics of gravel layer in a solar thermal energy conversion system for house heating

作　　者：张文基[1] 刘荣厚[2] 朴在林[3] 

机构地区：[1]沈阳农业大学工程学院,沈阳110161 [2]上海交通大学农业与生物学院生物质能工程研究中心,上海201101 [3]沈阳农业大学信息与电气工程学院,沈阳110161

出　　处：《农业工程学报》2005年第12期121-126,共6页Transactions of the Chinese Society of Agricultural Engineering

摘　　要：为了给房间提供热能而不消耗电力和常规能源，设计并制造了用于房屋取暖的太阳能热转换系统。该系统主要由太阳能集热器、卵石层和房间组成。太阳能集热器具有28根真空集热管，每根真空集热管的直径和长度分别为47mm和1500mm。在长4m宽2．7m的房间内铺设了150mm厚的卵石层。卵石大小为50～100mm。对由太阳能集热器热水自然循环加热的太阳能热转换系统卵石层的热特性进行了实验研究。测试了该系统不同单元的温度。结果表明，在考虑了每个测试单元热传递时间滞后的条件下，当系统的入口点和出口点的温度存在温差及卵石层和水泥地面存在温差时，该系统能够实现热能自然循环。证实了卵石层和地表面的水平温度分布均匀。卵石层储热周期为10h、放热周期为24h。以卵石层Et平均温度与户外平均温度之间的差值为依据，计算出卵石层一日内的储热量约为49MJ／d。In order to provide heat for a house without power and fossil energy consumption, a solar thermal energy conversion system for house heating was designed and manufactured. The system was mainly composed of a solar collector, gravel layer and a house. The solar collector had 28 vacuum tubes. The diameter and length of each tube were 47 mm and 1500 mm, respectively. The gravel layer with thickness of the 150 mm was put in the house whose length and width were 4 m and 2. 7 m, respectively. The particle size of the gravel was ranged within 50～100 mm. Thermal characteristics of the gravel layer in the system heated by hot water natural circulation with solar collector were studied. Temperature of each element was measured. Results showed that it was possible to realize heat natural circulation when temperature difference at inlet and outlet of the system, and that of the gravel layer and cement mortar surface were occurred when delay time of heat transfer in each element was considered. In addition, it was confirmed that horizontal temperature distribution of the gravel layer and cement mortar surface appeared evenly. Heat storage period of the gravel layer was 10 hours and its radia- tion period was 24 hours. The quantity of heat storage of the gravel was about 49 MJ/day when the difference of daily average temperature of gravel layer and daily average temperature of the outdoors was applied.

关 键 词：太阳能集热器 卵石层 储热 放热 热水自然循环 

分 类 号：S210.5[农业科学—农业机械化工程]