Heat rejection from horizontal tube through heat valve

Abstract EN

This study presents experimental work to construct a non- conventional thermosyphon where it is consists of three parts, which include the evaporator, adiabatic and condenser sections all of these parts are arranged radially in parallel to construct the heat valve (HV).

Heat valve used to evacuate heat from horizontal copper electrical heater tube by working fluid which is(distilled water, methanol, ethanol) with different filling ratio 66.6% and 83.3%.

Working fluid evacuate heat from copper evaporator towards condenser where a change in phase mechanism make insure to increase the heat performance of HV.

Thin stainless steel mesh grid coated evaporator to translate heat to the working fluid at the case of high evaporation of working fluid, while a very thin of aluminum fins are fixed to the condenser surface to extended it and construct the finned heat valve(FHV) with a high level thermal performance where heat reject in short time and make insure to condensate the working fluid’s vapor and that lead to low level of temperature in evaporator.

The results refer to the high thermal performance of FHV where a low temperature in evaporator with low heat storage because the short distance between condenser and evaporator with a high ratio between area of them .Result refer to the effect of working fluid type with simple effect in filling ratio.