Study the Effect of Single Segmental Baffle cut on Overall Heat Transfer Coefficient in Shell and Tu

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GRD Journals- Global Research and Development Journal for Engineering | Volume 3 | Issue 6 | May 2018 ISSN: 2455-5703

Study the Effect of Single Segmental Baffle cut on Overall Heat Transfer Coefficient in Shell and Tube Heat Exchanger Er. Satvirpal Singh Grewal M.Tech Scholar Department of Mechanical Engineering North-West Institute of Engg. and Tech., Dhudike, Moga, Punjab, India

Er. Kulwinder Singh Brar Assistant Professor Department of Mechanical Engineering North-West Institute of Engg. and Tech., Dhudike, Moga, Punjab, India

Er. Didar Singh Assistant Professor Department of Mechanical Engineering North-West Institute of Engg. and Tech., Dhudike, Moga, Punjab, India

Er. Karanjeet Singh M.Tech Scholar Department of Mechanical Engineering North-West Institute of Engg. and Tech., Dhudike, Moga, Punjab, India

Abstract To figure out the best baffle cut to obtain the maximum overall heat transfer coefficient for the better performance of shell and tube heat exchanger. Methods: To identify the best relation between the baffle cut and overall heat transfer coefficient, six different baffle cut varies from 15% to 40% were taken at the same mass of fluid. To analyze thermal design and overall heat transfer coefficient HTRI was used. To find out the relation between the baffle cut to overall heat transfer coefficient, we generated 2d profile corresponding to length and 3d profile for local heat transfer coefficient. We compared all six design variations to analyze the variation in overall heat transfer coefficient. After comparison of all six variations we figured out optimum relationship between Baffle cut and Overall Heat Transfer Coefficient. Result shows that at a particular cut the rate of heat transfer is the maximum. We found that 25% baffle cut is the optimum cut for single segmental baffle, this provides best combination of shell side velocity and B stream and generate enough turbulence for better heat transfer coefficient. It is also demonstrating good distribution of heat transfer in all localities of heat exchanger. If we decrease the baffle cut, it may increase turbulence but leads to decrease the shell side velocity and B stream, this results the less heat transfer coefficient. Similarly, by increasing the baffle cut there is increase in shell side velocity and B stream, but due to less turbulence less heat transferred. So there is less heat transfer coefficient. Thus for beat the performance of heat exchanger and optimum heat transfer coefficient, there should be best combination of all effective variables. Keywords- Shell and Tube Heat Exchanger, Baffle, Segmental Baffle, Helical Baffle, Overall Performance

I. INTRODUCTION In this modern world, heat exchangers are indispensible part of oil refining, electric power generation, environmental protection, chemical industry and many others. Although, there is much type of types of heat exchangers, but shell and tube heat exchanger is the most suitable type, because of its suitability at high pressure, robust construction and easy maintenance. Heat exchangers can be classified in many different ways like: i). Recuperates and Regenerators. ii). Transfer process: Direct contact and Indirect contact. iii) Geometry of construction: tubes, plates and extended surfaces. iv) Heat transfer mechanisms: single phase and two phase. V) Flow arrangements: parallel, counter and cross flows. In this paper we will majorly focus on shell and tube heat exchanger and its performance. Although there are many factors on which the performance of shell and tube depends, but we will majorly discuss about the baffle cut and its effect on the overall heat transfer coefficient.

II. LITERATURE SURVEY H. Reza Tasouji Azar, Shahram Khalilarya, Samad (2016) calculated data pressure drop and overall average heat transfer coefficient of shell side in helix baffles and segmental baffles and concluded for the common rete of mass flow and code and EXPRESS was used to compare this data. Results show that to improve the performance of heat transfer in helix baffles over segmental baffles, helix bundle achieved up to three times longer operational time.

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