Heat, Mechanical and Hydraulic Style of Heat Exchanger

 Thermal, Physical and Hydraulic Design of High temperature Exchanger Essay

Professional Summary

The following is a energy, mechanical and hydraulic style response report to a heat exchanger issue where ethylene glycol and a poor quality feed of water will be put through a shell and tube exchanger with the objective of cooling the ethylene glycol feed. A shell and tube exchanger was chosen over a number of other exchangers due to its high successful performance and its particular relative ease of maintenance in digesting these fluids. From the data given and specific warmth capacity explored for ethylene glycol, a MatLab script was built to determine values coming from a range of formulae for any variety of parameters including the preliminary duty, which was calculated to become 1486. one particular KW. It was chosen, that as water is a even more corrosive substance and has a higher working pressure, the water should move through tubes manufactured from stainless steel, which can be easier to clean, and the ethylene glycol throughout the shell aspect. From here the Log Imply Temperature Difference (LMTD), High temperature Transfer Coefficient (U = 714) and Total Interfacial Heat Copy Area (A = forty. 16m2) and a Reynolds number had been all calculated using MatLab. A number of 336 tubes intended for the exchanger were established and it was concluded that a 1-4 Layer Tube design was best suited with pipes of inner diameter 12-15. 05mm and an exterior diameter of 19. 05mm with a triangulado pitch of 23. 81mm giving a water pipe thickness of 4mm. Applying Kern's approach (Coulson & Richardson, 2005). Chemical Engineering Design, a baffle cut of 25% was required leading to a tube area pressure drop of zero. 45 tavern and a shell part pressure drop of zero. 44 tavern. The survey investigates additional design specifications and other essential data along with calculations showing how these technical specs were attained. Introduction

The objective of this problem was to design a heat exchanger for the transfer of heat between a relatively warmer Ethylene Glycol smooth stream and a chillier water stream using a covering and conduit heat exchanger. Shell and Tube high temperature exchangers will be the most common temperature exchangers present in processing and are also popular because of a variety of causes. A large surface area interface percentage to quantity and mass of allowable heat exchange within the framework is a very crucial design thought for efficient and affordable heat exchange between the liquids. In terms of development and materials, there is generally quite a bit of flexibility when it comes to assortment. Many different elements can be used to stop corrosion and dismantling the exchanger pertaining to maintenance (such as replacing tubes) and or cleaning is relatively straightforward. Because of the fouling of fluids with this problem, excessive resistance to corrosion was a significant requirement for a competent design. The style of shell and tube exchangers makes use of turbulence from elevated fluid velocity so high temperature exchange involving the fluids can be maximized by the use of baffles, which will also support the framework. Without exhaust baffles, fluids may possibly stagnate particularly parts of the shell causing increased corrosion and obstruction of fluid flow. Plate heat exchangers were also regarded as a style possibility for their large surface area of heat exchange possibility between fluids created by the large interfacial area of the china, which make in the structure. This in turn maximizes success of these unit's as well as perhaps allowing for an actual size reduction of the high temperature exchanger by itself. Shell and tube exchangers may not necessarily offer these types of physically small structures, yet, on the other hand compact designs of dish heat exchangers can be a wonderful expense because of their intricate and elaborate set ups with a possibility of being quite fragile. Components of high expense such as ti plates are often used simply contributing to this challenge and not enabling a great deal of material flexibility just like shell and tube buildings. The temperature changes of both liquids are pretty low thus thermal and expansionary stresses are not...