New combined plate heat exchangers and four kinds of new distribution regions of plate heat exchanger have been established by SOLIDWORKS software, and simulated by FLUENT software based on Computational Fluid Dynamics method. Heat transfer coefficient and pressure drop of new combined plate heat exchangers have been analyzed, according to which the optimal parameters have been chosen. The normal distribution area has been analyzed according to its flow pattern, pressure drop and distribution performance. Four kinds of new distribution area have been proposed based on the analysis. The results show that new combined plate heat exchanger J plate could maintain the performance in terms of heat exchange and the pressure drop decrease compared with normal M plate. While the corrugation angle of big corrugation angle plate (plate ②) of combined plate is 60 degrees and the corrugation intercept is 18mm or 16mm or 14mm, the convection heat transfer coefficient and the pressure drop increase with the increasing of the corrugation angle of small corrugation angle plate (plate ①) whether for hot or cold fluid. While the corrugation angle of plate ① is 30 or 40 degrees, the corrugation intercept of plate ② has little influence on combination performance. While the corrugation angle of plate ① is 50 degrees, the corrugation intercept of plate ② has great influence on combination performance. Distribution region strongly influences the distribution of working fluid in plate heat exchangers. Normal distribution region has poor distribution performance along with large pressure drop. The distribution region of M series has better distribution performance and smaller pressure drop. New-designed distribution regions present better distribution performance and smaller pressure drop, as well. Among them, distribution region Ⅲ shows the best distribution performance and less pressure drop.
WEN Jue
,
ZHANG Jing
,
ZHAO Li
,
LI Deyu
. Numerical Simulation of New Combined Plate Heat Exchangers and Distribution Region[J]. Journal of Mechanical Engineering, 2016
, 52(2)
: 150
-156
.
DOI: 10.3901/JME.2016.02.150
[1] 刘杨. 运用FLUENT软件对板式换热器性能的数值分析[J]. 广州化工, 2013, 41(13)：221-223. LIU Yang. Numerical analysis of plate heat exchanger using fluent software[J]. Guangzhou Chemical Industry, 2013, 41(13)：221-223.
[2] FERNANDES C S, DIAS R P, NÓBREGA J M, et al. Laminar flow in chevron-type plate heat exchangers：CFD analysis of tortuosity, shape factor and friction factor[J]. Chemical Engineering and Processing, 2007, 46(9)：825-833.
[3] LI Wei, LI Hongxia, LI Guanqiu, et al. Numerical and experimental analysis of composite fouling in corrugated plate heat exchangers[J]. International Journal of Heat and Mass Transfer, 2013, 63：351-360.
[4] 崔立祺. 基于FLUENT的板式换热器三维数值模拟[D]. 杭州：浙江大学，2008. CUI Liqi. Three dimensional numerical modeling of PHE based on FLUENT[D]. Hangzhou：Zhejiang University, 2008.
[5] 张仲彬, 董鹏飞, 王月明, 等. 板式换热器结构优化三维数值分析[J]. 化工机械, 2013(2)：206-210. ZHANG Zhongbin, DONG Pengfei, WANG Yueming, et al. 3D numerical analysis of structure optimization of plate heat exchangers[J]. Chemical Engineering and Machinery, 2013(2)：206-210.
[6] 蔡毅, 贾志刚, 周文学, 等. 人字形波纹板式换热器性能数值模拟的研究[J]. 计算机与应用化学, 2009, 26(1)：105-108. CAI Yi, JIA Zhigang, ZHOU Wenxue, et al. Hydrodynamics and thermal characteristics of chevron-type plate heat exchangers[J]. Computers and Applied Chemistry, 2009, 26(1)：105-108.
[7] 董俐言, 王宝龙, 石文星, 等. 板式蒸发式冷凝器传热传质的数值模拟[J]. 制冷学报, 2013, 32(1)：11-17. DONG Liyan, WANG Baolong, SHI Wenxing, et al. Numerical simulation on heat and mass transfer of plate evaporative condenser[J]. Journal of Mechanical Engineering, 2013, 32(1)：11-17.
[8] 黄少君, 卢玫, 李凌, 等. 混合板式换热器通道的数值模拟研究[J]. 工程热物理学报, 2011, 32(11)：1925- 1928. HUANG Shaojun, LU Mei, LI Ling, et al. Numerical simulation of hybrid plate heat exchanger’s plate channel[J]. Journal of Engineering Thermophysics, 2011, 32(11)：1925-1928.
[9] 郭春生, 杜文静, 王飞, 等. 不同倾斜角新型板式换热器特性及场协同原理分析[J]. 中国石油大学学报, 2011, 35(6)：144-146. GUO Chunsheng, DU Wenjing, WANG Fei, et al. Characteristics and field synergy principle analysis of new-type plate heat exchangers with different inclined angles[J]. Journal of China University of Petroleum, 2011, 35(6)：144-146.
[10] 徐志明, 王月明, 张仲斌, 等. 板式换热器性能的数值模拟[J]. 动力工程学报, 2011, 31(3)：198-202. XU Zhiming, WANG Yueming, ZHANG Zhongbin, et al. Numerical simulation on performance of plate heat exchanger[J]. Journal of Chinese Society of Power Engineering, 2011, 31(3)：198-202.
[11] 仇嘉, 魏文建, 张绍志, 等. 基于CFD数值模拟的板式换热器分配器性能研究[J]. 机械工程学报, 2010, 46(14)：130-136. QIU Jia, WEI Wenjian, ZHANG Shaozhi, et al. Research on performance of distributors used in plate heat exchanger based on CFD numerical simulation[J]. Journal of Mechanical Engineering, 2010, 46(14)：130-136.
