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Heat Exchangers
Published in Greg F. Naterer, Advanced Heat Transfer, 2018
A shell-and-tube heat exchanger consists of an outer shell pipe where fluid enters through one end, passes across internal tubes carrying a fluid at a different temperature, and exits through the other end. A shell-and-tube heat exchanger with one shell and one tube pass is illustrated in Figure 9.2 and a configuration with one shell and two tube passes is shown in Figure 9.3. Baffles are usually placed perpendicular to the inner tubes to enhance mixing and turbulence of the outer fluid stream. Baffles are perforated plates that obstruct some region of the outer flow while directing the inner flow around the remaining uncovered sections. A common example of a shell-and-tube heat exchanger is a condenser. The outer flow is steam that condenses and leaves as water while transferring heat to the inner tubes carrying cold water.
Applications
Published in Raj P. Chhabra, CRC Handbook of Thermal Engineering Second Edition, 2017
Joshua D. Ramsey, Ken Bell, Ramesh K. Shah, Bengt Sundén, Zan Wu, Clement Kleinstreuer, Zelin Xu, D. Ian Wilson, Graham T. Polley, John A. Pearce, Kenneth R. Diller, Jonathan W. Valvano, David W. Yarbrough, Moncef Krarti, John Zhai, Jan Kośny, Christian K. Bach, Ian H. Bell, Craig R. Bradshaw, Eckhard A. Groll, Abhinav Krishna, Orkan Kurtulus, Margaret M. Mathison, Bryce Shaffer, Bin Yang, Xinye Zhang, Davide Ziviani, Robert F. Boehm, Anthony F. Mills, Santanu Bandyopadhyay, Shankar Narasimhan, Donald L. Fenton, Raj M. Manglik, Sameer Khandekar, Mario F. Trujillo, Rolf D. Reitz, Milind A. Jog, Prabhat Kumar, K.P. Sandeep, Sanjiv Sinha, Krishna Valavala, Jun Ma, Pradeep Lall, Harold R. Jacobs, Mangesh Chaudhari, Amit Agrawal, Robert J. Moffat, Tadhg O’Donovan, Jungho Kim, S.A. Sherif, Alan T. McDonald, Arturo Pacheco-Vega, Gerardo Diaz, Mihir Sen, K.T. Yang, Martine Rueff, Evelyne Mauret, Pawel Wawrzyniak, Ireneusz Zbicinski, Mariia Sobulska, P.S. Ghoshdastidar, Naveen Tiwari, Rajappa Tadepalli, Raj Ganesh S. Pala, Desh Bandhu Singh, G. N. Tiwari
A shell-and-tube heat exchanger is essentially a bundle of tubes enclosed in a shell and so arranged that one fluid flows through the tubes and another fluid flows across the outside of the tubes, heat being transferred from one fluid to the other through the tube wall. A number of other mechanical components are required to guide the fluids into, through, and out of the exchanger, to prevent the fluids from mixing, and to ensure the mechanical integrity of the heat exchanger. A typical shell-and-tube heat exchanger is shown in Figure 4.1.5 (TEMA 2007), but the basic design allows many modifications and special features, some of which are described later.
Building Operations and Maintenance
Published in Steve Doty, Commercial Energy Auditing, 2020
The shell and tube heat exchanger in general has a fundamental limitation such that the two leaving fluid temperatures can only approach each other. For most of these types of heat exchangers, the two temperatures can only be economically brought to within 5 or 10 degrees of each other, and 10 degrees F is typical. For special applications of the shell and tube heat exchanger, such as the refrigerant condenser, special baffles can put the liquid refrigerant intimately in contact with the entering fluid for sub-cooling of the liquid after the bulk of the heat transfer has occurred in the main body of the shell.
CFD study on heat transfer and pressure drop of nanofluids (SiO2/H2O, Al2O3/H2O, CNTs/H2O) in a concentric tube heat exchanger
Published in International Journal of Ambient Energy, 2022
Ankit Kumar Gupta, Bhupendra Gupta, Jyoti Bhalavi, Prashant Baredar, Hemant Parmar, Ramalingam Senthil
Day by day, the energy consumption increases, so the fulfilment of the energy demand of everyone around the world has become one of the biggest challenges. Researchers, scientist and engineers try their best to develop methods and devices which decrease the energy wastages and give optimum utilisation of available energy. Many devices are used in industries, power plants, refrigeration, air conditioning, automobiles, transportation and machining operation, with tremendous potential for energy conservation. One of those devices is the heat exchanger, so the importance of heat exchanger from the viewpoint of energy conservation increases immensely. A heat exchanger is a device that is used for heat transfer between hot fluids and cold fluids. There are several types of heat exchanger such as shell and tube heat exchanger, plate heat exchanger, helical coiled heat exchanger, radiator, double-pipe heat exchanger, micro heat exchanger, cooling tower and compact heat exchanger are presently used in various applications. Most of the heat exchangers are of the indirect contact type heat exchanger in which cold and hot fluid are separated from a wall and heat from hot fluids to cold fluids is transferred from the wall.