甲醇水溶液脉动热管启动特性研究  

Start-up characteristic of pulsating heat pipe with aqueous methanol as working fluid

作　　者：王迅[1] 李月月[1] 

机构地区：[1]天津大学机械工程学院中低温热能高效利用教育部重点实验室,天津300072

出　　处：《化学工程》2017年第6期17-21,共5页Chemical Engineering(China)

摘　　要：以体积分数为30%的甲醇水溶液、甲醇和水为工质,在不同加热功率、不同充液率和不同倾斜角工况下,对脉动热管的启动特性进行了实验研究。结果表明:混合工质脉动热管的启动方式和纯工质类似,甲醇水溶液平均温度处于水和甲醇二者稳定运行时的平均温度之间且更趋近于水;脉动热管的启动时间随着加热功率的增加而逐渐减小。在50%充液率工况下,甲醇水溶液的启动时间比甲醇长,比水短。而在大充液率(80%)和小充液率(20%),大加热功率下,甲醇水溶液的启动时间比甲醇短;脉动热管的启动时间随着倾斜角度的增加而减少,在相同倾斜角条件下,80%充液率的启动时间比20%充液率的启动时间长。With aqueous methanol of volume fraction 30%, methanol and water as working fluid, start-up characteristics of pulsating heat pipe were studied under the operating condition of different heat inputs, filling ratio and inclination angles. Experimental results show that the type of start-up for mixing working fluids is similar to pure working fluids ; the average temperature of aqueous methanol is between water and methanol in the condition of stable operation and is closer to water; the start-up time of pulsating heat pipe gradually decreases with the heat load inputs increasing. The start-up time of aqueous methanol is longer than that of methanol, but shorter than that of water with 50% filling ratio. However the start-up time of aqueous methanol is shorter than that of methanol with high filling ratio and low filling ratio at high heat load inputs; the start-up time of pulsating heat pipe gradually decreases with the inclination angles increasing. In the condition of identical inclination angle, the start-up time of working fluid with 80% filling ratio is longer than which with 20% filling ratio.

关 键 词：甲醇水溶液 脉动热管 启动特性 启动时间 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]