Abstract
The thermal performance of a stainless steel heat pipe was analyzed based on its operation limits. The heat pipe developed here shall be used in compacts heat exchangers which can be used for instance in cogeneration plants. First, a mathematical model based on the heat pipe operation limits (capillary, viscous, sonic, entrainment and boiling limits) are presented. This model is used as an useful tool for design of heat pipes. Next, a heat pipe was produced with a stainless steel tube with an outer diameter of 6 mm, length of 230 mm and capillary structure composed by one round stainless steel screen mesh (number 100). The working fluid used was deionized water. The heat pipe has an evaporator and a condenser length of 80 mm and 110 mm, respectively. The condenser was cooled by forced convection using a water heat sink set at 20 °C and the evaporator was heated using an electrical resistor. This heat pipe was tested for increasing heat loads varying from 5 to 20 W. The theoretical and experimental results are compared in order to validate the mathematical model.
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More From: International Review of Mechanical Engineering (IREME)
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