scholarly journals Numerical Simulation of Plain Fin-and-Round Tube Heat Exchanger under Frost Condition

2010 ◽  
Author(s):  
Amar Ali Hussein ◽  
A. R Abu Talib ◽  
N. M Adam ◽  
M. A. Wahid ◽  
S. Samion ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Heat Exchanger ◽  
Round Tube ◽  
Tube Heat Exchanger

scholarly journals Numerical Simulation of Shell and Tube Heat Exchanger by using CFD

IARJSET ◽  
2017 ◽  
Vol 4 (1) ◽  
pp. 105-110
Author(s):  
Yadav G A ◽  
Janugade S V ◽  
Patil M R
Keyword(s):  
Numerical Simulation ◽  
Heat Exchanger ◽  
Tube Heat Exchanger ◽  
Shell And Tube

scholarly journals Numerical Simulation of the Shell-and-Tube Heat Exchanger: Influence of the Lower Flows and the Baffles on a Fluid Dynamics

2017 ◽  
Vol 07 (04) ◽  
pp. 349-361 ◽  
Author(s):  
Sebastião José dos Santos Filho ◽  
Josedite Saraiva de Souza ◽  
Antonio Gilson Barbosa de Lima
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Heat Exchanger ◽  
Tube Heat Exchanger ◽  
Shell And Tube

Experimental Research on Microchannel Heat Exchanger Performance for Residential Air Conditioner Applications

2009 ◽  
Author(s):  
Jianghong Wu ◽  
Shuangfeng Wang ◽  
Yunting Ge
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Air Conditioning ◽  
The Other ◽  
Air Conditioner ◽  
Round Tube ◽  
Tube Heat Exchanger ◽  
Face Area ◽  
Residential Air Conditioning ◽  
Air Conditioning Systems

Two type condensers of R22 residential air conditioning systems were investigated in this study. Two R22 residential air-conditioning systems, one with a microchannel condenser and the other with a round-tube condenser, were examined experimentally, while the other components of the two systems were identical except the condensers. Based on the principle of the microchannel condensation, the analysis of heat transfer along parallel heat exchanger was conducted. The non-uniform air velocity distribution at the face of the microchannel condenser and refrigerant distribution in headers were taken into account in this research. The mechanism and possibility of the superior thermal performance as compared with conventional fin-tube heat exchangers were discussed. In addition, the maximum of thermal performance influenced by the running parameter was experimentally measured. The experimental results show that with one third face area of round tube heat exchanger, microchannel condenser’s pressure drop increase around 12–23% and refrigeration output increase 2–5%, refrigerant charge decreases around 50%, it is found to be a promising candidate for residential air conditioning condenser.

Numerical Simulation of Heat Losses between a Partition Plate and the Wall of the Head of a Plastic Heat Exchanger

2010 ◽  
Vol 297-301 ◽  
pp. 650-655
Author(s):  
Rita Aguilar Osorio ◽  
Keith Cliffe
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Polyvinylidene Fluoride ◽  
Plastic Shell ◽  
Tube Heat Exchanger ◽  
Heat Exchanger Design ◽  
The Heat Transfer Coefficient

For this research it was considered that the heat exchanger was affected by leakage in the head across the partition plate and the wall between the tube passes. Leakage was a problem in the plastic shell and tube heat exchanger, because it was difficult to seal the partition plate to the head of the exchanger. The material used for manufacturing the heat exchanger was polyvinylidene fluoride, PVDF. In order to predict the amount of flow leaking through the clearances of the tube passes, a numerical simulation was carried out using the computational Fluid Dynamics CFD Fluent Software. To obtain the percentage of the heat loss across the 4 tube passes, different clearance sizes between the partition plate and the wall of the head of the exchanger were analysed. For the smaller clearance size of 0.2 mm the heat transfer coefficient was reduced up to 15%. These results suggest that the flow mass bypassing the head between tube passes affect the results of the heat transfer coefficient and confirm the experimental observation, that its performance was affected by leakage between tube passes. This research served as an extension of the preliminary plastic heat exchanger design.

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