【作者】 陈秋炀； 王秋旺； 曾敏； 黄彦平； 肖泽军；

【Author】 CHEN Qiuyang, WANG Qiuwang , ZENG Min, HUANG Yanping, XIAO Zejun (State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049 National Key Laboratory of Bubble Physics and Natural Circulation, Nuclear Power Institute of China, Chengdu 610041)

【机构】 西安交通大学动力工程多相流国家重点实验室； 中国核动力研究设计院空泡物理和自然循环国家级重点实验室；

【摘要】 对相同的换热器体积、相同折流板数、相同管程数的两壳程螺旋折流板换热器和两壳程弓形折流板换热器进行了对比性的数值模拟研究,结果表明:(1)在相同壳程Re下,两壳程螺旋折流板换热器的换热系数h比两壳程弓形折流板换热器略低,压降DP比两壳程弓形折流板换热器低40％。(2)在相同壳程流量G下,两壳程螺旋折流板换热器的换热能力比两壳程弓形折热器高60％,压降DP比两壳程弓形折热器高80％。(3)在相同壳程压降DP下,两壳程螺旋折流板换热器的换热系数h比两壳程弓形折流板换热器高30％。(4)在允许的压降范围内,当换热要求较高时,多壳程的螺旋折流板管壳式换热器可强化换热,带走更多的热量,保证生产的安全。更多还原

【Abstract】 In the present paper, the two shell pass shell-and-tube heat exchangers with helical baffles and segmental baffles were investigated with CFD method. Comparisons were made under the same volume, amount of baffles and tubes passes. The main conclusions are as follows: (1) Under the same Re number, the heat transfer coefficient (h) of heat exchangers with helical baffles is smaller than that of segmental baffles slightly. The pressure drop (DP) of two shell passes heat exchangers with segmental baffles is larger than that of helical baffles about 40%. (2) Under the same mass flow rate, the h of two shell passes heat exchangers with helical baffles is larger than that of segmental baffles about 60%. Meanwhile, the DP of two shell passes heat exchangers with helical baffles is larger than that of segmental baffles about 80%. (3) Under the same pressure drop, h of two shell passes heat exchangers with helical baffles is larger than that of segmental baffles about 30%. (4) Under the allowable pressure drop range, the multiple shell passes shell-and-tube heat exchangers with helical baffles can be adopted to remove more heat transfer rate and make productive process safe when heat-removing is severe, at the situation with high heat transfer require.更多还原