金溶胶对太阳能光热转化效率的影响  

Effect of gold colloid on solar thermal conversion efficiency

作　　者：王霄[1] 张鸿雁[1] WANG Xiao ZHANG Hong-yan(School of Environmental and Municipal Engineering, Xi＇an University of Architecture and Technolog)

机构地区：[1]西安建筑科技大学环境与市政工程学院

出　　处：《建筑热能通风空调》2017年第4期18-21,34,共5页Building Energy & Environment

摘　　要：在集热工质中添加纳米粒子是现阶段一种常见的提高太阳能光热转化效率的方法。本文首先利用化学还原法制备了平均粒径约为50 nm的纳米金颗粒溶胶,并经过透射电子显微镜和紫外分光光度计表征验证;之后在设计定做的集热装置中对超纯水溶液、超纯水-金溶胶混合液进行太阳光照射,并对光照过程中的溶液温度和瞬时太阳辐射值进行记录,研究集热工质中加入纳米金颗粒对太阳能光热转化效率的影响。Adding nano particles into the thermal mass is a common method to increase the efficiency of solar energyand heat transfer. In this paper, gold colloid was prepared by chemical reduction method and was characterized andvertificated by transmission electron microscope and UV-Vis spectroscopy; then ultra pure water solution and ultra purewater-gold colloid mixture were irradiated in customized heat collection device and the solution temperature andinstantaneous solar radiation values were recorded during irradiation to research the effect of gold colloid on solarthermal conversion efficiency.

关 键 词：太阳能 光热利用 光热转化效率 金溶胶 

分 类 号：TK51[动力工程及工程热物理—热能工程] TU18[建筑科学—建筑理论]