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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

INVESTIGATION OF FLOW AND HEAT TRANSFER CHARACTERISTICS FOR A SHELL-AND-TUBE HEAT EXCHANGER WITH NEW BAFFLES

Get access (open in a dialog) DOI: 10.1615/IHTC16.her.022562
pages 4745-4751

Sinopsis

Improving the performance of heat exchangers is essential to reduce energy consumption and increase energy efficiency for air-conditioning, refrigeration, power generation, chemical industries and so on. There are large dead zone in shell side of traditional shell-and-tube heat exchangers with segmental baffles that lead to the decrease of heat transfer area and the large resistance loss. In order to improve and optimize heat transfer efficiency of the heat exchanger with segmental baffles, the structure of a new shell-and-tube heat exchanger with "3-2" louver baffles is presented. In the shell side of the new heat exchanger with "3-2" louver baffles, one period of louver baffles include two baffle groups. Three inclined plates fixed on one baffle ring for the first baffle group and two inclined plates fixed on another baffle ring for the second baffle group. Three dimensional numerical simulation was conducted to study the flow and heat transfer performance for the shell-and-tube heat exchanger with new baffles. The flow field structure and overall performance was analyzed. It was found that the pressure drop in the shell side of the heat exchanger with new baffles at different baffle angles are lower than that of the shell-and-tube heat exchanger with conventional segmental baffles and the pressure drop decrease with the decreasing baffle angle. The results show that the overall performance of the shell-and-tube heat exchanger with new baffles are superior to the shell-and-tube heat exchanger with conventional segmental baffles.