A heat exchanger is a device that is used to transfer thermal energy between two or more fluids, between a solid surface and a fluid a fluid, or between solid particulates and a fluid at different temperatures and in thermal contact In this model, two separated fluids at different temperatures flow through the heat exchanger:one through the tubes (tube side) and the other through the shell around the tubes (shell
Figure 1. State-of-the-art heat exchangers. (a) shell-and-tube heat exchanger, (b) plate-and-frame heat exchanger, (c) plate-fin heat exchanger and (d) printed circuit heat exchanger [1, 2]. 1.2 Heat Exchanger Design Considerations In design of heat exchangers, following requirements need to be considered . x Operating pressure and temperature. Dryplus-3 shell & tube evaporators - Alfa Laval - PDF 4 Dryplus-3 shell & tube evaporators Dryplus-3 series of shell and tube evaporators represent the natural technological evolution of a generation of heat exchangers leader in the air conditioning and refrigeration applications. The models of the series ensure cooling capacities up to 1500 kW at nominal conditions, from 1 to 4 independent cooling circuits, 3 different baffle distances depending on the
Heat Exchanger Design Example..(a) Objective:Design a double pipe heat exchanger with bare inner multi-tubes that can be used to cool engine oil with cold sea water. The following are the design specification:Fluid Engine Oil Sea Water Inlet Temperature, C 65 20 Outlet Temperature, C 55 25 Heat PROBLEM 11 - MITPROBLEM 11.14 KNOWN:A shell and tube Hxer (two shells, four tube passes) heats 10,000 kg/h of pressurized water from 35°C to 120°C with 5,000 kg/h water entering at 300°C. FIND:Required heat transfer area, As. SCHEMATIC:ASSUMPTIONS:(1) Negligible heat loss to surroundings, (2) Negligible kinetic and potential energy changes, (3) Constant properties.
Example 5.2 Miniature Shell-and-Tube Heat Exchanger A miniature shell-and-tube heat exchanger is designed to cool engine oil in an engine with the engine coolant (50% ethylene glycol). The engine oil at a flow rate of 0.23 kg/s enters the exchanger at 120°C and leaves at 115°C. The 50% ethylene glycol at a rate of 0.47 kg/s enters at 90°C. Solved:11.3 A Shell-and-tube Heat Exchanger Is To Heat An Question:11.3 A Shell-and-tube Heat Exchanger Is To Heat An Acidic Liquid That Flows In Unfinned Tubes Of Inside And Outside Diameters Di = 10 Mm And Do = 11 Mm, Respectively. A Hot Gas Flows On The Shell Side. To Avoid Corrosion Of The Tube Material, The Engineer May Specify Either A Ni-Cr-Mo Corrosion-resistant Metal Alloy (?m = 8900 Kg/m3, Km = 8 W/ M·K)
a plate heat exchanger are: Takes up much less space than a traditional shell-and-tube heat exchanger. Alfa Laval heat exchangers 3 Thin material for the heat transfer surface this gives optimum heat transfer, since the heat only has to penetrate thin material. High turbulence in the medium this gives a higher convection, which West Virginia UniversityHT33 SHELL AND TUBE HEAT EXCHANGER in the shell which force the fluid to flow across the tube bundle to improve the heat exchange. Tat Procedure T3 t qcold (Refer to the Operational Procedures on page 3-1 if you need details of the instrumentation and how to operate it. The mains supply should be switched on before starting this experiment.)
Most shell-and-tube heat exchangers have multiple passes to enhance the heat transfer. Here is an example of a 1-2 (1 shell pass and 2 tube passes) heat exchanger. As you can see, in a 12 heat exchanger, the tube- -side fluid flows the entire length of the shell, turns around and flows all
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