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The closed-loop pulsating heat pipe is a type of small heat transfer device with a very high thermal conductivity. It was invented to meet the requirement for smaller heat transfer devices. It can transfer sufficient heat for heat dissipation applications in modern electronic devices. The objective of this work is to study thermal performance of closed loop pulsating heat pipe with acetone and methanol as working fluid.. Copper has been selected as material for heat pipe due to compatibility of copper with acetone and methanol as working fluid. Filling ratio of the working fluid significantly influence on the performance closed loop pulsating heat pipe. From the past studies it was observed that filling ratio of 30-75 % provides the best result hence 60 % filling ratio has been selected for this filing ratio the thermal performance of closed loop pulsating heat pipe with acetone and methanol as working fluid is investigate.

The closed-loop pulsating heat pipe is a type of small heat transfer device with a very high thermal conductivity. It was invented to meet the requirement for smaller heat transfer devices.The objective of this work is to study thermal performance of closed loop pulsating heat pipe with acetone as working fluid. Copper has been selected as material for heat pipe due to compatibility of copper with acetone as working fluid. Filling ratio of the working fluid significantly influence on the performance closed loop pulsating heat pipe. From the past studies it was observed that filling ratio of 30-75 % provides the best result hence 60 % filling ratio has been selected for this filing ratio the thermal performance of closed loop pulsating heat pipe with acetone as working fluid is investigated.

An experimental investigation of closed loop pulsating heat pipes (CLPHPs) with a hydrocarbon as working fluid determine the effect of heat transfer and overall system performance at a given constrained dimensional heat source. The experimental investigation included start-up time and temperature, the average, minimum, and maximum evaporator temperature during its operation, the overall heat transfer capability, and the overall thermal resistance of the system, also the behaviour of CLPHP under different heat inputs and with the different working fluids. To achieve the goal the experimental setup is fabricated and tested with two different working fluids Acetone and Methanol with the filling ratio of 60 %. This work provides the detailed discussion on the thermal performance of CLPHP with Acetone and Methanol as working fluid and behaviour of CLPHP at different heat inputs.