Experimental investigation of the loop thermosyphon with different adiabatic lengths charged with different working fluids

Abstract

This paper reports an experimental investigation of a closed‐loop thermosyphon system charged with water and other low saturation fluids, such as ethanol, acetone, and methanol, for different adiabatic lengths, filling ratios, and heat loads. The closed‐loop thermosyphon with two inline vertical heaters in the evaporator section and forced air‐cooled plate‐type heat exchanger in the condenser section, connected by a changeable adiabatic length, is investigated at different working conditions. Out of five filling ratios used in the analysis, at 0.6 filling ratio, the loop thermosyphon is seen to be operated at its best. The acetone‐charged loop thermosyphon shows the lowest values (up to 72% reduction) of overall thermal resistance than that of other fluids and significantly higher effectiveness, due to the plate‐type forced air‐cooled condenser. For the acetone‐filled thermosyphon, an almost 15% increase in the effectiveness is observed by changing the adiabatic length from 800 to 200 mm. This study suggests that the limitation of the loop thermosyphon with a water‐cooled condenser to cool electronic components, computational clusters, and data centers is well fulfilled by the loop thermosyphon with plate‐type forced air‐cooled condenser. The nucleate pool boiling correlation is developed and validated for the loop thermosyphon system to determine the evaporator heat transfer coefficient.

Predicting the Performance of Solar Water Heater using Thermal Performance Enhancers

“…The heat transmission coefficient of 2456 W/m2.°C is greater than that of the preceding two types.. When compared to other fluids, the efficiency and low values (up to 72% reduction in total thermal resistance) of an acetone-charged loop thermosyphon were striking [26]. The plate-type forced air-cooled condenser had the maximum heating and cooling efficiency.. Because of this, the loop thermosyphon with a plate-type forced air-cooled condenser was seen as an adequate solution to the problem of overheating in electronic components, computer clusters, and data centers when using a water-cooled condenser.…”

Machine learning approach to predict the thermal performance of closed‐loop thermosyphon

“…2 score of the DT model was 98.504; whereas, the R 2 score of the RF model and linear regression model were about 94.76 and 92.17, respectively.…”

“…For the performance, reliability, and lifespan of the components, thermal management of the cooling devices is very important so that these devices should work within the safe temperature range. 1,2 The study of CLT and its performance has been carried out by different researchers theoretically, experimentally, and numerically. But, the machine learning (ML) approach is not yet used in the CLT system.…”

“…Thermal management of these systems is one of the important trends of the current technology. For the performance, reliability, and lifespan of the components, thermal management of the cooling devices is very important so that these devices should work within the safe temperature range 1,2 …”

Theoretical and experimental investigation of a heat pipe heat exchanger for energy recovery of exhaust air

“…They showed that with the increase in m e / m c , the HPHE's effectiveness and heat transfer rate increased. At different adiabatic lengths, filling ratios, and heat fluxes, a two‐phase thermosyphon loop was investigated by Birajdar and Sewatkar 20 using methanol, ethanol, water, and acetone as working fluids. Results demonstrated that the filling ratio of 0.6 showed higher performance.…”