Study of Cycle Output Improvement by Work-Fluid Including Phase Change Material

摘要

This paper deals with the output improvement of heating and cooling cycle by using the work-fluid including phase change material.The experimental study is carried out by heat exchange between work-fluid and heat transfer surface.The work-fluid flows into a high temperature or a low temperature heat transfer surface from the narrow path.In order to increase the amount of the heat transmission, a trace of Diethylether (boiling point 34.8 °C), as a phase change material (PCM), is added to the work-fluid.The parameters of the experiment are additive amount of PCM, rotational speed of the displacer piston and temperature of heat transfer surface.It is clarified that the addition of PCM to work-fluid brings to increase of engine cycle output.The effect of PCM addition is evaluated by output ratio which is defined from the experimental cycle output data.The requirements for acquiring the increasing effect of output by adding PCM are clarified.