Experimental investigation on thermal performance of a closed loop pulsating heat pipe (CLPHP) using methanol and distilled water at different filling ratios

2016 ◽  
Author(s):  
Md. Lutfor Rahman ◽  
Anindita Dhar Swarna ◽  
Syed Nasif Uddin Ahmed ◽  
Sanjida Perven ◽  
Mohammad Ali
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Closed Loop ◽  
Distilled Water ◽  
Pulsating Heat Pipe

Effect of Inclination Angle on the Closed Loop Pulsating Heat Pipe Thermal Performance

2013 ◽  
Author(s):  
Pramod R. Pachghare ◽  
Ashish M. Mahalle
Keyword(s):  
Thermal Resistance ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Inclination Angle ◽  
Heat Input ◽  
Closed Loop ◽  
Pulsating Heat Pipe ◽  
Working Fluids ◽  
Inclination Angles ◽  
R 134A

The closed loop pulsating heat pipe (CLPHP) is a passive two-phase heat transfer device, patented by Akachi (1990). Due to its excellent features, PHP has been considered as one of the promising technologies for electronic cooling, heat exchanger, etc. This paper presents an experimental study shows the effect of inclination angle on the thermal performance of CLPHP, which consist of 10 turns of copper tubes having inner and outer diameter 2 mm and 3.6 mm respectively. The equal lengths of evaporator, condenser and adiabatic sections are 50 mm each. Different working fluids are used as R-134a, Methanol and Water. For all experimentations, an optimum filling ratio was maintained 50% by volume. The thermal performance have been investigated with different inclination angles (viz. 0°, 20°, 40°, 60° and 90°) at various heat input from 5 to 50W in the steps of 5W. The thermal resistance (which is inversely proportional to thermal performance) of CLPHP at various heat input are plotted for different working fluids. The result shows that, the thermal resistance decreases as heat input increases. But at low heat input i.e. upto 25W, the thermal resistance decreases rapidly and the PHP performance is more sensitive to the inclination angle whereas high heat input i.e. above 25W, the thermal resistance decreases smoothly and less independent to the inclination angle. In all inclination angles, vertical bottom heat position (at 90°) of CLPHP gives best thermal performance due to presence of gravity force. At all inclination angles, the working fluid R-134a show best thermal performance followed by methanol and water.

Experimental Investigation of Triton X-100 Solution on Pulsating Heat Pipe Thermal Performance

2018 ◽  
Vol 32 (3) ◽  
pp. 806-812 ◽  
Author(s):  
Mohammad Alhuyi Nazari ◽  
Roghayeh Ghasempour ◽  
Mohammad Behshad Shafii ◽  
Mohammad H. Ahmadi
Keyword(s):  
Experimental Investigation ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Pulsating Heat Pipe ◽  
Triton X
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