ヒートパイプの使用温度範囲についての一考察
1982 年 61 巻 3 号 p. 179-187
詳細
1982 年 61 巻 3 号 p. 179-187
In this paper, a study of useful temperature range of heat pipes em-ploying ThermS 300, mercury, sulphur and sodium as the working fluid are presented.
A ThermS 300 heat pipe is made from a SUS 304 stainless steel tube with 25mm diameter and 1.5mm thickness and is wickless type. The total length of the heat pipe is 1000mm, the length of heating zone is 180mm, adiabatic zone is 320mm and the remaing part is the condenser.
Mercury heat pipe is manufactured from SUS 304 stainless steel tube with 12.7mm diameter and 1. 5mrn thickness. The capillary structure is two layers of 50 mesh stainless steel. The total length of heat pipe is 300mm, the length of heating zone is 60mm, adiabatic zone is 60mm and the remaining part is condenser. Sulphur heat pipe is made from STPA steel tube for boiler with 27.2mm diameter and 4. Omm thickness and is wickless type. The total length is 500mm. The length of heating zone is 100mm, adiabatic zone is 100mm and condenser zone is 300mm.
Sodium heat pipe is manufactured from SUS 316 L stainless steel tube with 25mm diameter and 1. 5mm thickness and the capillary structure is two layers of 50 mesh stainless steel. The total length is 1000mm, in which heating zone is 265mm, adiabatic zone is 235 mm and condenser zone is 500mm.
The experiment is carried out mainly by means of bottom heating, in which surface temperature fluctuation at evaporator and condenser zone and pressure fluctuation in heat pipe are measured at low pressures.
As a result of the tests, the useful temperature range of these heat pipes is discussed.
