Synthesis and Heat Transfer Performance of Phase Change Microcapsule Enhanced Thermal FluidsSource: Journal of Heat Transfer:;2015:;volume( 137 ):;issue: 009::page 91018DOI: 10.1115/1.4030234Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Polyalphaolefins (PAOs) are widely implemented for electronics cooling, but suffer from a low thermal conductivity of about 0.14 W/mK. However, adding thermally conductive, phasechangematerial (PCM) particles to a PAO can significantly improve the fluid thermal properties. In this paper, PCM microcapsules and silvercoated PCM microcapsules were synthesized using the emulsion polymerization method and the thermal performance of PCM fluids was studied in a microchannel heat sink and compared with that of the pure PAO. A test loop was designed and fabricated to evaluate the synthesized PCM fluids and it was found that fluid with uncoated PCM microcapsules has a 36% higher heat transfer coefficient than that of the pure PAO. Additionally, the heat transfer coefficient of PCM fluids with silvercoated PCM microcapsules was also 27% higher than that of pure PAO, but lower than that of fluids with uncoated PCM microcapsules. The thermal resistance of the uncoated PCM fluid was about 20% lower than that of the pure PAO fluid at the same pumping power, despite the PCM fluid's higher viscosity. Pumping tests were run for several hours and showed no evidence of particle accumulation or settling within the heat transfer loop.
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| contributor author | Cao, Fangyu | |
| contributor author | Kalinowski, Paul | |
| contributor author | Lawler, John | |
| contributor author | Seung Lee, Hak | |
| contributor author | Yang, Bao | |
| date accessioned | 2017-05-09T01:19:55Z | |
| date available | 2017-05-09T01:19:55Z | |
| date issued | 2015 | |
| identifier issn | 0022-1481 | |
| identifier other | ht_137_09_091018.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/158557 | |
| description abstract | Polyalphaolefins (PAOs) are widely implemented for electronics cooling, but suffer from a low thermal conductivity of about 0.14 W/mK. However, adding thermally conductive, phasechangematerial (PCM) particles to a PAO can significantly improve the fluid thermal properties. In this paper, PCM microcapsules and silvercoated PCM microcapsules were synthesized using the emulsion polymerization method and the thermal performance of PCM fluids was studied in a microchannel heat sink and compared with that of the pure PAO. A test loop was designed and fabricated to evaluate the synthesized PCM fluids and it was found that fluid with uncoated PCM microcapsules has a 36% higher heat transfer coefficient than that of the pure PAO. Additionally, the heat transfer coefficient of PCM fluids with silvercoated PCM microcapsules was also 27% higher than that of pure PAO, but lower than that of fluids with uncoated PCM microcapsules. The thermal resistance of the uncoated PCM fluid was about 20% lower than that of the pure PAO fluid at the same pumping power, despite the PCM fluid's higher viscosity. Pumping tests were run for several hours and showed no evidence of particle accumulation or settling within the heat transfer loop. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Synthesis and Heat Transfer Performance of Phase Change Microcapsule Enhanced Thermal Fluids | |
| type | Journal Paper | |
| journal volume | 137 | |
| journal issue | 9 | |
| journal title | Journal of Heat Transfer | |
| identifier doi | 10.1115/1.4030234 | |
| journal fristpage | 91018 | |
| journal lastpage | 91018 | |
| identifier eissn | 1528-8943 | |
| tree | Journal of Heat Transfer:;2015:;volume( 137 ):;issue: 009 | |
| contenttype | Fulltext |