Experiment on Novel Design of Tapered Shape Heat Pipe

International Conference on Mechanical Engineering Research and Application

Suparman, Sudjito^1 ; Sarip^1^2 ; Yuliati, Lilis^1 ; Choiron, Moch. Agus^1

Mechanical Engineering Department, Brawijaya University, Malang, Indonesia^1

Mechanical Engineering Department, Ronggolawe School of Technology, Central Java, Indonesia^2

关键词: Boiling temperature;    Driving forces;    Evaporation and condensation;    Evaporator section;    Low heat inputs;    Novel design;    Sensible heat;    Vapor flows;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/494/1/012097/pdf
DOI  :  10.1088/1757-899X/494/1/012097

来源: IOP

【 摘 要 】

Most design of heat pipes did not consider the sudden volume increase of vapor when water evaporates. This experiment investigates the performances improvement of new design of tapered shape heat pipe, where the diameter of condenser section (D) is larger than evaporator section (d) to facilitate the increase of vapor volume. In this experiment the variation of D/d are 1, 2, 3, and 4. Heat inputs were also varied to 20 Watt, and 50 Watt. The experiment results show that the higher the heat input, the higher the boiling temperature and the higher D/d the boiling temperatures remain constant for the same heat input. The dominant driving force of vapor flow is resistance for D/d=1, while for D/d higher the dominant driving force are evaporation and condensation. The driving force is also influenced by heat input, where for low heat input the effect of D/don the driving force is insignificant. The results of heat transfer coefficient with D/d and heat input is similar to the results of the driving force with D/d and heat input. Heat transfer coefficient of heat pipe which utilizes latent heat is higher than conventional heat exchanger which utilizes sensible heat.