Water-air flow visualization in the plate heat exchanger
碩士 === 國立中央大學 === 能源工程研究所 === 99 === When the plate heat exchanger as the evaporator, entrance two phases refrigerant because of the action of gravity that causes refrigerant flow mal-distribution in a channel. In order to reduce this phenomenon, at present is more than install inlet port distributo...
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ndltd-TW-099NCU053990102017-07-09T04:29:51Z http://ndltd.ncl.edu.tw/handle/23586118526778113998 Water-air flow visualization in the plate heat exchanger 水-空氣在板式熱交換器內的流動觀察 Fan-yu Meng 孟繁宇 碩士 國立中央大學 能源工程研究所 99 When the plate heat exchanger as the evaporator, entrance two phases refrigerant because of the action of gravity that causes refrigerant flow mal-distribution in a channel. In order to reduce this phenomenon, at present is more than install inlet port distributor in the entrance, but distributor''s opening direction will affect refrigerant flow distribution in a channel. In this research an experimental study to visualize water with dye (single phase flow) and water-air flow (two phases flow)distribution in the plate heat exchanger that in order to find the optimum distributor''s opening direction. From dye visualization results, the flow rate nears entrance and export ports are higher than that of in the middle of place. In the middle of plate, the flow is uniformly distributed in different Reynolds number. From water-air flow visualization results, the flow distribution will be more uniform when void fraction and Reynolds number increase. And know that the optimum distributor''s opening direction should be 3, 4, 5or 6 in void fraction is 0.77. Chien-Yuh Yang 楊建裕 2011 學位論文 ; thesis 113 zh-TW |
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碩士 === 國立中央大學 === 能源工程研究所 === 99 === When the plate heat exchanger as the evaporator, entrance two phases refrigerant because of the action of gravity that causes refrigerant flow mal-distribution in a channel. In order to reduce this phenomenon, at present is more than install inlet port distributor in the entrance, but distributor''s opening direction will affect refrigerant flow distribution in a channel.
In this research an experimental study to visualize water with dye (single phase flow) and water-air flow (two phases flow)distribution in the plate heat exchanger that in order to find the optimum distributor''s opening direction.
From dye visualization results, the flow rate nears entrance and export ports are higher than that of in the middle of place. In the middle of plate, the flow is uniformly distributed in different Reynolds number.
From water-air flow visualization results, the flow distribution will be more uniform when void fraction and Reynolds number increase. And know that the optimum distributor''s opening direction should be 3, 4, 5or 6 in void fraction is 0.77.
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author2 |
Chien-Yuh Yang |
author_facet |
Chien-Yuh Yang Fan-yu Meng 孟繁宇 |
author |
Fan-yu Meng 孟繁宇 |
spellingShingle |
Fan-yu Meng 孟繁宇 Water-air flow visualization in the plate heat exchanger |
author_sort |
Fan-yu Meng |
title |
Water-air flow visualization in the plate heat exchanger |
title_short |
Water-air flow visualization in the plate heat exchanger |
title_full |
Water-air flow visualization in the plate heat exchanger |
title_fullStr |
Water-air flow visualization in the plate heat exchanger |
title_full_unstemmed |
Water-air flow visualization in the plate heat exchanger |
title_sort |
water-air flow visualization in the plate heat exchanger |
publishDate |
2011 |
url |
http://ndltd.ncl.edu.tw/handle/23586118526778113998 |
work_keys_str_mv |
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