Performance of an R410a Filled C-Shape Heat Pipe

Heat pipe heat exchangers (HPHEs) can be used to enhance dehumidification and increase the cooling capabilities of heating, ventilation and air conditioning (HVAC) systems.A C-shape thermosyphon (CST) is a thermosyphon bent into the shape of a "C".The slope of the CST is defined as the angle of the plane containing the CST to the horizontal.This paper reports on the experimental thermal performance of a R410A-filled CST operating with various power inputs and at various angles of slope.The results show that there is a decrease in performance at 30˚.Comparison with results predicted and based on heat transfer coefficients obtained from tests carried out on the vertical thermosyphon showed good agreement.