Structural Elements of Shell-and-Tube Heat Exchangers

Shell-and-tube heat exchangers are among the most widely used and versatile types of equipment in industrial heat engineering due to their high reliability, mechanical strength, and adaptability to a broad range of operating conditions. They are extensively applied in petrochemical, energy, metallurgical, chemical, and heavy industries, where processes often involve high pressures, elevated temperatures, corrosive media, and significant heat loads. This study presents the structural principles of shell-and-tube heat exchangers, examines their main components and functional interactions, and discusses the influence of design features on heat transfer efficiency, hydraulic resistance, and mechanical stability. Special attention is given to the classification of shell-and-tube heat exchangers according to TEMA standards, including fixed tube sheet, floating head, U-tube, and kettle-type reboiler designs. The advantages, limitations, and fields of application of each structural type are analysed. The paper emphasizes that the optimal selection of exchanger configuration, materials, and internal elements such as baffles is a critical engineering decision that directly affects operational safety, service life, and energy efficiency.