SiO_2-水纳米流体热管式真空集热管的设计研究  

Design and Research on SiO_2-Water-Nanofluid-Heat-Pipe-Type Vacuum Heat Collecting Tube

作　　者：王万新 WANG Wan-xin(Mechatronic Engineering Department,Dezhou University,Dezhou 253023,China)

机构地区：[1]德州学院机电工程学院,山东德州253023

出　　处：《机械工程与自动化》2018年第2期9-11,共3页Mechanical Engineering & Automation

摘　　要：为提高热管式真空集热管的传热效率,改善太阳辐射热的转换效率,在分析现有热管传热介质的基础上,提出以SiO_2-水纳米流体为传热工质的思路,对原有铜-玻璃热管式真空集热管进行了改进研究。以长度为2 100mm、外径为8mm的热管为研究对象,分别充装纳米流体和去离子水作为传热介质,并将热管应用于真空集热管,利用某集热器的换热性能实验台测试瞬时集热效率。研究表明:SiO_2-水纳米流体较水介质导热系数明显提高,在强化传热方面有巨大的潜能。In order to improve the heat transfer efficiency of heat-pipe-type vacuum tube and increase the energy conversion efficiency of solar radiation,this paper proposed a method that regard SiO 2 water nanofluid as heat transfer medium to improve the copper-glass-heat-pipe-style vacuum heat collecting tube on the basis of the analysis on current heat pipe transfer medium.The paper regarded a heat pipe with the length of 2 100 mm and external diameter of 8 mm as the research object.Respectively filled up with nanofluid and deionized water as heat transfer medium,the object heat pipes were used as vacuum heat collecting tube.Meanwhile,a set of heat exchanger thermal performance test bench was used to test the instantaneous heat collecting efficiency.The research shows that SiO 2 water nanofluid medium provides higher thermal conductivity compared with water medium,which has great potential in the field of heat transfer enhancement.

关 键 词：重力热管 真空集热管 纳米流体 设计 

分 类 号：TK513[动力工程及工程热物理—热能工程]