Characteristics on condensation heat transfer and pressure drop for a low GWP refrigerant in brazed plate heat exchanger

2018 ◽  
Vol 122 ◽  
pp. 1272-1282 ◽  
Author(s):  
Byung Hoon Shon ◽  
Chung Woo Jung ◽  
Oh Jin Kwon ◽  
Chang Kyoung Choi ◽  
Yong Tae Kang
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Plate Heat Exchanger ◽  
Condensation Heat Transfer ◽  
Plate Heat ◽  
Brazed Plate Heat Exchanger

Performance of a Plate Heat Exchanger Operated with Water-Al2O3 Nanofluid

2016 ◽  
Vol 831 ◽  
pp. 188-197 ◽  
Author(s):  
Janusz T. Cieśliński ◽  
Artur Fiuk ◽  
Wojciech Miciak ◽  
Bartłomiej Siemieńczuk
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Plate Heat Exchanger ◽  
Transfer Coefficients ◽  
Plate Heat ◽  
Heat Transfer Coefficients ◽  
Overall Heat Transfer Coefficient ◽  
Weight Impact ◽  
Brazed Plate Heat Exchanger

This study is focused on experimental investigation of a selected type of brazed plate heat exchanger (PHEx). The main aim of the paper was to experimentally check the ability of nanofluids to enhance the performance of PHEx. A typical water-Al2O3 nanofluid was tested and compared to that of the base fluid, i.e. water. Nanoparticles were tested at the concentration of 0.1% and 1% by weight. Impact of the 1 day and 3 days break of operation of the tested PHEx on its performance was of particular interest. Pressure drop in all runs was measured as well. The Wilson approach was applied in order to estimate heat transfer coefficients for the PHEx passages. It was observed, that addition of nanoparticles resulted in deterioration of an overall heat transfer coefficient for the selected PHEx and tested conditions, i.e. temperature range and Reynolds number. Moreover, substantial increase of pressure drop was recorded after each break of operation of the tested PHEx.

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