塔式太阳能吸热器炉墙背板温度计算方法  

Calculation of Solar Power Tower Receiver Furnace Wall Backboard Temperature

作　　者：李琪[1] 马宇佳 张明宝[1] 张义堃 LI Qi;MA Yu-jia;ZHANG Ming-bao(Harbin Boiler Co.,Ltd.;Harbin Institute of Technology)

机构地区：[1]哈尔滨锅炉厂有限责任公司,黑龙江哈尔滨150046 [2]哈尔滨工业大学

出　　处：《电站系统工程》2021年第4期79-80,82,共3页Power System Engineering

摘　　要：外漏管式吸热器作为熔盐塔式太阳能光热电站的核心设备之一,运行时会受到较高的能流辐射。而吸热器的吸热管并非紧密相连,会存在一定间隙,吸热管之间的间隙漏光会使炉墙保温背板达到较高温度。对于使用硬质保温或铺设防雨盖板的炉墙,可能使背板发生变形甚至出现烧坏的现象。然而,传统锅炉光管水冷壁计算方法只能计算照射到炉墙背板的辐射总量,并不能给出炉墙背板的受辐射分布及温度分布。为此,提出一种炉墙背板温度计算方法,并按此方法计算了炉墙背板温度分布情况。按照提出的计算方法,在实际工程中,可以根据温度估计结果合理设计吸热器及炉墙背板的结构参数,或采取在炉墙背板涂刷高反射率涂层等手段,提升运行安全。External drain tube type receiver is core equipment of molten salt tower solar thermal power station. During operation, the receiver is liable to suffer from large radiation flux. As there is clearance between receiver tubes, the temperature of furnace wall insulation backboard would be high because of the effect of clearance light-leaking. If the furnace wall is made of hard insulating material or equipped with rain cover, the backboard would probably be distorted or even be burnt out. However, traditional calculation methods of boiler light tube water wall only count total radiation on furnace wall backboard. Radiation distribution and temperature distribution of furnace wall backboard are not well considered. Therefore, in this paper, a furnace wall backboard temperature calculation method is raised, with which temperature distribution on the backboard is calculated. According to the method proposed in this paper, the operation safety in field can be improved by deciding receiver and furnace wall backboard structural parameters with backboard temperature evaluation results, or by means of painting a high reflectivity coating.

关 键 词：吸热器 炉墙背板 角系数 温度 

分 类 号：TK51[动力工程及工程热物理—热能工程]