Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices
The closed-loop pulsating heat pipe (CLPHP) is a heat exchanger with a very high thermal conductivity. A single CLPHP is frequently used to release the heat between one heat dissipating device and one heat sink. However, some electrical applications have a number of heat dissipating devices. The CLP...
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th-cmuir.6653943832-16282014-08-29T09:29:32Z Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices Kammuang-Lue N. Sakulchangsatjatai P. Terdtoon P. The closed-loop pulsating heat pipe (CLPHP) is a heat exchanger with a very high thermal conductivity. A single CLPHP is frequently used to release the heat between one heat dissipating device and one heat sink. However, some electrical applications have a number of heat dissipating devices. The CLPHP is applied to transfer the heat from multiple devices. Since the CLPHP primarily transfers the heat by means of working fluid's phase change, the thermal characteristic of the CLPHP significantly depends on the working fluid type. In order to be the fundamental information for heat exchanger manufacturers, this study on effect of working fluids has been performed. Three electrical plate heaters were installed to the CLPHP as the heat dissipating devices. Experiments were conducted by varying the working fluid which was R123, ethanol and water. For each working fluid, the input heat fluxes of heat dissipating devices were also varied within 6 different patterns. It can be concluded that when the latent heat of evaporation increases - in a case of the vertical CLPHP, and when the dynamic viscosity of liquid increases - in a case of the horizontal CLPHP, the thermal resistance increases and the thermal performance consequently decreases. © 2012 IEEE. 2014-08-29T09:29:32Z 2014-08-29T09:29:32Z 2012 Conference Paper 9781467345514 10.1109/EPTC.2012.6507067 97610 http://www.scopus.com/inward/record.url?eid=2-s2.0-84879741178&partnerID=40&md5=34fb1d7b69b8c926d15442e423621110 http://cmuir.cmu.ac.th/handle/6653943832/1628 English |
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The closed-loop pulsating heat pipe (CLPHP) is a heat exchanger with a very high thermal conductivity. A single CLPHP is frequently used to release the heat between one heat dissipating device and one heat sink. However, some electrical applications have a number of heat dissipating devices. The CLPHP is applied to transfer the heat from multiple devices. Since the CLPHP primarily transfers the heat by means of working fluid's phase change, the thermal characteristic of the CLPHP significantly depends on the working fluid type. In order to be the fundamental information for heat exchanger manufacturers, this study on effect of working fluids has been performed. Three electrical plate heaters were installed to the CLPHP as the heat dissipating devices. Experiments were conducted by varying the working fluid which was R123, ethanol and water. For each working fluid, the input heat fluxes of heat dissipating devices were also varied within 6 different patterns. It can be concluded that when the latent heat of evaporation increases - in a case of the vertical CLPHP, and when the dynamic viscosity of liquid increases - in a case of the horizontal CLPHP, the thermal resistance increases and the thermal performance consequently decreases. © 2012 IEEE. |
format |
Conference or Workshop Item |
author |
Kammuang-Lue N. Sakulchangsatjatai P. Terdtoon P. |
spellingShingle |
Kammuang-Lue N. Sakulchangsatjatai P. Terdtoon P. Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices |
author_facet |
Kammuang-Lue N. Sakulchangsatjatai P. Terdtoon P. |
author_sort |
Kammuang-Lue N. |
title |
Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices |
title_short |
Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices |
title_full |
Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices |
title_fullStr |
Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices |
title_full_unstemmed |
Effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: A case of three heat dissipating devices |
title_sort |
effect of working fluids on thermal characteristic of a closed-loop pulsating heat pipe heat exchanger: a case of three heat dissipating devices |
publishDate |
2014 |
url |
http://www.scopus.com/inward/record.url?eid=2-s2.0-84879741178&partnerID=40&md5=34fb1d7b69b8c926d15442e423621110 http://cmuir.cmu.ac.th/handle/6653943832/1628 |
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