Production Process And Performance Testing Of Thermosyphon

In recent years, the application of heat pipes is more and more widely. Therefore, the research of heat pipes becomes more and more important. Shandong University joined the banner of AMS-02 project in 2005. In former research, Aluminum-Ammonia axial groovy heat pipe have been manufactured. This paper brings forth the design, manufacture and performance testing of three types of thermosyphon, including Copper-Water pipe, Copper-Methanol pipe and Copper-Acetone pipe.Firstly, this paper introduces the basic principles and theories of heat pipe, and the process of heat transfer of routine heat pipe. The heat transfer limits and factors that influence the limits are analysed, especially for the thermosyphon. The temperature distribution of thermosyphon is brought forward.Secondly, this text introduces the design and manufacture process of the heat pipes in detail. The contents mainly include compatibility judgment of the pipe material and the work fluid, the design of the shape and size of the pipe, the quantity of work fluid filled into the pipe.Then the paper talks about the testing process of the heat pipes, mainly about the experiment platform set up for the test and the experiment approach. The heat segment of the pipe is tied around with resistance coil for heating, while the cooling segment cold with flow water. 14 thermal couples are placed onto the surface of heat pipes orderly to obtain the temperature signals. The signals are collected and storaged by the NET-DAQ which is a kind of production of FLUKE company.Finally, according to the analyse of the experiment data, this paper gets some conclusions as follows: the pipe has different start temperature and start time in different conditions, also the different kind of heat pipes have their own start temperature and start time in the same conditions. In different conditions, the paper also points out the variety regulations of axial temperature difference and the equivalent thermal conductivity. The conclusions indicate that the Copper-Water heat pipe has more excellent performance at a higher heat power compare to the other two. The cooling conditions influence the distribution of the temperature and thermal resistance and the equivalent thermal conductivity.