In general, for the calculation and design of the different components of heat exchangers, in this document the criteria set by tema code is. Design of heat exchangers3 user needs of heat exchanger include types of fluids, quality of fluids fouled fluids, clean fluids,etc. General constfuction features of tema standard heat exchangers. Unit performance successful performance of heat transfer equipment, length of service and freedom from operating difficulties are largely dependent upon. In fact, fouling has been recognised for a long time, and research on heat exchanger fouling was conducted as early as 1910 and the first practical application of this research was implemented in the 1920s. In a heat exchanger there is no direct contact between the two fluids. Although the majority of heat exchangers used on chemical plant are shell and tube units, there are many other types available. The ninth edition of the tema standards was prepared by the technical committee of. Because of the number of variations in mechanical designs for front and rear heads and shells, and for commercial reasons, tema has designated a system of notations that correspond to each major type of front head, shell type and rear head. Selection of heat exchanger tema layout and number of passes.
Rev 01 a l ling rev 03 viska mulyandasari checked by. Due to the custom nature of all xchanger heat exchangers, this manual discusses the characteristics and procedures that are common to all exchangers. Tema is a trade association of leading manufacturers of shell and tube heat exchangers, who have pioneered the research and development of heat exchangers for over sixty years. Up to eight design conditions can be investigated for fixed, utube, kettle and floating tubesheet style exchangers. If you need asme uhx and tema mechanical design calculations, drawings and reports then the compress heat exchanger option is for you. Good practice for heat exchanger selection and design page 4 of 12 use one tube pass per shell pure counter current. Heat exchangers find widespread use in power generation, chemical processing. Heat transfer by shell and tube heat exchangers tema.
The exchange can take place between a process stream and a utility stream cold water, pressurized steam, etc, a process stream and a power source electric heat, or between two. Pdf industrial heat exchangers tema type heat exchangers. Arrangement, tube thk, tema tubesheet and flat covers. The heat exchangers of the longtherm series can be adapted to almost any requirement profile.
Shell and tube heat exchangers basic calculations instructor. Design, operation, maintenance and enhancement ali a. Tema india decided to conduct an extensive research. Warranty and service contact information is also included. In this system, each exchanger is designated by a threeletter. We use pv elite or compress to design heat exchangers. Heat exchanger selection and sizing engineering design guideline author. Tema has established and maintains a set of construction standards for heat exchangers, known as the tema standard tema also produces software for evaluation of flowinduced vibration and of flexible shell elements expansion joints. General construction features of tema standard heat exchangers. Tema stands for tubular exchanger manufacturers association. Tema is trade association of leading manufacturers of shell and tube heat exchangers, who have pioneered the research and development of heat exchangers for over sixty years. The tubular exchanger manufacturers association, inc. Specifying shellandtube heat exchangers understand what heat exchanger design specialists need to know and remember, you know your process best asif raza shellandtube heat exchangers are one of the most important and commonly used process equipment items in the chemical process industries cpi. How to understand tema tolerances and how they impact your.
Heat exchangers jordan university of science and technology. Reproduced with permission of the tubular exchanger manufacturers association, inc. Specification of tube parameters size, layout, pitch and material. These asme code calculations with the uhx tubesheet calculations were run in intergraph pv elite software. Although heat exchangers come in every shape and size imaginable, the construction of most heat.
Tema stands for tubular exchangers manufacturers association and is a set of standards that were developed by leading shell and tube manufacturers. When we talk of tolerances of flow nozzles and support locations, those manufacturers that belong to tema tubular exchanger manufacturers association are expected to build each heat exchangers to within those accepted tolerance called out in tema. Heat exchangers are devices that regulate efficient heat transfer from one fluid to another. Tema is trade association of leading manufacturers of shell and tube heat exchangers, who have. When you deal with a tema manufacturer, you enter into a partnership with an organization dedicated to furnishing a product of the highest technical standards.
Heat exchangers are typically designed according to asme section viii division 1 requirements and include an asme ustamp. Heat exchangers are used to transfer heat between two sources. This is a us code and is used together with asme section viiifor the design of unfired pressure vessels. Tema sheets are used by many process engineers to identify their exchangers and to communicate with heat exchanger manufacturers. R sekulib university of kentucky introduction a heat exchanger is a device that is used for transfer of thermal energy enthalpy between two or more fluids, between a solid surface and a fluid, or between solid particulates and a. Tema is a set of standards developed by leading heat exchanger manufacturers that defines the design and manufacturing parameters of shell and tube type heat exchangers.
The tubular exchanger manufacturers association also known as tema is an association of fabricators of shell and tube type heat exchangers. Standard shell sizes from 8 inches through 42 inches in diameter. Aa, bg, c, d, hp, hr, lc, and tv series heat exchangers. Form key a information required to thermally rate and quote a heat exchanger. Good practice for heat exchanger selection and design. Introduction to heat exchangers bengt sunden lund institute of technology. Tema has established a set of construction standards for shell and tube heat exchangers. Combining each of these resistances in series gives. Tema heat exchanger tubular exchanger manufactures association tema is the most widely used standard or stipulated heat exchanger design code. Breech lock heat exchanger pdf high pressure screw plug also called breech lock exchangers are of the most reliable heat exchangers in the plant, it is very clear to me that. They are available in a wide range of sizes, embossments and connection types, offering the best compromise between low flow resistance and highly efficient heat exchange. Some examples of the tema designation for heat exchangers. This is a very popular version as the heads can be removed to clean the inside of the tubes. A heat exchanger is a device that is used to transfer thermal energy enthalpy between two or more fluids, between a solid surface and a fluid.
Bonnet intergral cover, one pass shell, fixed tubesheet bonnet. Changes in required tubesheet thickness often thicker vs tema have been noted by designers. A heat exchanger is a heat transfer device that exchanges heat between two or more process fluids. Tema has developed a notation system to designate major types of shelland tube exchangers. The engineer may have little knowledge of the attributes of these other types so is not able to make a reasonable. Industrial heat exchangers tema type heat exchangers. Heat exchangers 73 individual thermal resistances of the system. Heat transfer equipment company hughesanderson heat exchangers, inc. Shell and tube heat exchangers page 4 of 30 mnl 032a issued 29 august 08, prepared by j. These standards define the style of heat exchanger and the machining and assembly tolerances. Do not hesitate to contact one of our engineers by email or at 2122697840. The role of engineering designers is to convert the user needs into the heat exchanger outputs. E1mnl032a design and rating of shell and tube heat. A information required to thermally rate and quote a heat exchanger b thermal properties required if fluid is not in our data bank.
Pdf selection of heat exchanger types gerard hawkins. Heat exchangers are devices used to transfer heat between two or more fluid streams at different temperatures. Tubular exchanger manufacturers association wikipedia. Chapter 52 heat exchangers, vaporizers, condensers joseph w. The heat is transferred from the hot fluid to the metal isolating the two fluids and then to the cooler fluid. Single or multipass tube arrangements for maximum efficiency over a wide variety of tube side flow volumes. The tema code specifies the mechanical design procedure, tolerances allowed and. Heat exchangers have widespread industrial and domestic applications. The tubular exchanger manufacturers association tema is an association of manufacturers of shell and tube heat exchangers. For quality assurance, one need only look for the tema plate attached to the heat exchanger.