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...

Full description

Bibliographic Details
Main Authors: Fan-yu Meng, 孟繁宇
Other Authors: Chien-Yuh Yang
Format: Others
Language:zh-TW
Published: 2011
Online Access:http://ndltd.ncl.edu.tw/handle/23586118526778113998
id ndltd-TW-099NCU05399010
record_format oai_dc
spelling 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
collection NDLTD
language zh-TW
format Others
sources NDLTD
description 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.
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 AT fanyumeng waterairflowvisualizationintheplateheatexchanger
AT mèngfányǔ waterairflowvisualizationintheplateheatexchanger
AT fanyumeng shuǐkōngqìzàibǎnshìrèjiāohuànqìnèideliúdòngguānchá
AT mèngfányǔ shuǐkōngqìzàibǎnshìrèjiāohuànqìnèideliúdòngguānchá
_version_ 1718494020541349888