Comparative Evaluation and Performance Analysis of Heat Exchangers Featured with Peened Surface  

作　　者：DINESHBABU Chinnadurai SHIVA SANKARAN Nallasamy VENKATESH RAJAKrishnan VENKATESH Rathinavelu 

机构地区：[1]Department of Mechanical Engineering,Kongunadu College of Engineering and Technology,Tamil Nadu-621215,India [2]Department of Mechanical Engineering,Selvam College of Technology,Namakkal,Tamil Nadu-637003,India [3]Department of Mechanical Engineering,Sona College of Technology,Salem,Tamil Nadu-636005,India [4]Department of Mechanical Engineering,Saveetha School of Engineering,Saveetha Institute of Medical and Technical Sciences(SIMATS),Saveetha University,Chennai 602105,Tamilnadu,India

出　　处：《Journal of Thermal Science》2025年第1期50-61,共12页热科学学报(英文版)

摘　　要：Heat exchangers have the potential for various engineering applications,and their performance is enriched by surface modification.The proposed system enriches the heat exchanger's performance by adapting a peened stainless steel(SS)surface blasted with copper,grinding,sand,and iron.The influences peened SS surface modified with a copper blast,grinding,sandblast,and iron blast on the surface morphology of shell and tube heat exchanger surface(STHE)is analyzed via tungsten heated cathode electron gun featured scanning electron microscope and observed coarse grain surface.The SS surface featured STHE performance is experimentally evaluated by different flow rates(30,60,90,and 120 L/min)underwater fluid medium functioned by the temperature ranges of 25-75℃ and its results are compared with computational fluid dynamic(CFD)/heat transfer research(HTRI)analyzed results.The 60 L/min flow rate was spotted as an optimum value for both shell and tube side reasons.The STHE is operated with a 60 L/min flow rate under the different peened surfaces and evaluated its Stanton number,Nusselt number,logarithmic mean temperature difference(LMTD),overall heat transfer coefficient,number of transfer units(NTU),effectiveness,and exergy efficiency.The iron blasted SS peened surface was observed to have better SHTE performance like Stanton number(0.0012),Nusselt number(2180),reduced LMTD of 31℃,improved overall heat transfer co-efficient of 2400 W/(m^(2)·K),better NTU of 0.5532,good effectiveness value of 0.45162,and hiked exergy efficiency of 10% respectively.

关 键 词：penned surface performance analysis stainless steel shell and tube heat exchanger 

分 类 号：TK172[动力工程及工程热物理—热能工程]