流体机械

2020, v.48;No.576(06) 25-30

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集中供热用非对称板式换热器流动换热的研究
Study on Flow and Heat Transfer of Asymmetric Plate Heat Exchanger for Central Heating

刘治廷;宋翀芳;张建伟;雷勇刚;景胜蓝;王飞;
Liu Zhiting;Song Chongfang;Zhang Jianwei;Lei Yonggang;Jing Shenglan;Wang Fei;College of Environmental Science and Engineering,Taiyuan University of Technology;Taiyuan Thermal Group Co.,Ltd.;

摘要(Abstract):

非对称板式换热器流道截面相异的特性为集中供热一二次网流量差异下换热性能的优化提供了可能。通过数值模拟,研究了不同工况下人字形非对称板式换热器的波纹倾角β、节高比■/H对其传热系数和流动阻力的影响;以经济学费用现值PC为标识,对其综合性能进行评价。结果表明:波纹倾角β对不同节高比板片的影响并不相同,其对小节高比(■/H≤5)板片换热系数和阻力影响均较大,而大节高比(■/H≥6)对波纹倾角β敏感性较弱;当β≤60°时,大节高比板片具有较好的换热性能和较低的流动阻力,其经济性优势显著,可节省33%~61%的总投资费用;综合考虑设备性能和经济性,β=50°、■/H=6、7为合理的结构参数。
Asymmetric plate heat exchangers have the characteristics of different cross-section.This provides the possibility of optimizing the heat transfer performance under the difference of the flow rate of the central heating.Using the numerical simulation method,two important parameters of the herringbone asymmetric plate heat exchangers under different working conditions were studied—the ripple angleβ and intercept to height ratio ■/H;The overall performance was evaluated by the present value of economic cost—PC value.The results show that the β has different effects on the plate with different intercept to height ratio/H,and it has a greater influence on the heat transfer coefficient and resistance of plates with intercept to height ratio ■/H≤5,while the plates with intercept to height ratio ■/H≥6 is less sensitive to the β;when β≤60°,the large intercept to height ratio/H has better heat transfer performance and extremely low flow resistance,which has obvious economic advantage and can save 33%~61% of the total investment cost;By comprehensive consideration of equipment performance and economy,β=50°,intercept to height ratio ■/H=6,7 are the reasonable structural parameters.

关键词(KeyWords): 集中供热;非对称板式换热器;数值模拟;结构优化
central heating;asymmetric plate heat exchangers;numerical simulation;structural optimization

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基金项目(Foundation): 国家自然科学基金项目(U1510136);; 山西省回国留学人员科研资助项目(2016-031)

作者(Author): 刘治廷;宋翀芳;张建伟;雷勇刚;景胜蓝;王飞;
Liu Zhiting;Song Chongfang;Zhang Jianwei;Lei Yonggang;Jing Shenglan;Wang Fei;College of Environmental Science and Engineering,Taiyuan University of Technology;Taiyuan Thermal Group Co.,Ltd.;

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