https://orcid.org/0000-0001-8229-5946
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ABSTRACT
A comprehensive study for testing of cylindrical heat pipe has been carried out with a number of experiments. Characteristics and performance of heat pipe were evaluated individually with water, methanol, and acetone at different inclination angles (θ). Results obtained show that heat pipe charged with acetone has the smallest thermal resistance and highest heat transfer coefficient compared to other working fluids, hence identified as the best working fluid for the prepared heat pipes. Also, the best angle of inclination for the working heat pipe is 45° as the thermal performance of the heat pipe is optimal at this angle.
Nomenclature
| A | = | Area of the heat pipe, m2 |
| D | = | Diameter, m |
| h | = | Heat transfer coefficient, W/m2ºC |
| L | = | Length, m |
| L | = | Distance along the length of the heat pipe, m |
| Q | = | Heat, W |
| R | = | Resistance, ºC/W |
| T | = | Thickness, m |
| T | = | Temperature, ºC |
| ∆T | = | Temperature difference, ºC |
| Τ | = | Time duration, min |
Greek Symbols
| θ | = | Inclination angle |
Subscripts
| aC | = | Average quantity of condenser section |
| aE | = | Average quantity of evaporator section |
| C | = | Condenser |
| E | = | Evaporator |
| in | = | Input |
| p | = | Heat pipe |
| th | = | Thermal |
| x | = | Position |
Acknowledgments
The authors would like to acknowledge the financial assistance provided by IIT (ISM) Dhanbad as Faculty Research Seed Grant (Project no: FRS (94)/2015-2016/Mechanical Engg.) for Project titled as “Effect of Nanofluids on Performance of Heat Pipe”.