Performance Analysis of Triple Concentric Tube Heat Exchanger with Ribs

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue VIII, August 2018 | ISSN 2321–2705

Performance Analysis of Triple Concentric Tube Heat Exchanger with Ribs

Manish Kumar Singh1, Pushpendra Kumar Jain2

 1M. Tech Thermal, Department of Mechanical Engineering, SIRT Bhopal, India
2Associate Professor, Department of Mechanical Engineering, SIRT Bhopal, India

Abstract— Present study includes the performance analysis of triple concentric tube heat exchanger with ribs using ANSYS Fluent 15. Water is used as working fluid. The inner most tube provides passage for the flow of water at room temperature. The intermediate tube encloses the innermost tube and also provides passage for hot water. The outermost tube encloses both the tubes and also provides passage for cold water. This arrangement is called N-H-C arrangement and the flow of all fluid is co-current. The intermediate tube consists of ribs having length of 4 mm and 8 mm and a width of 1 mm. The results are presented in the form of temperature at the inlet and outlet of tube and also the effectiveness of heat exchanger with and without ribs are shown. The result obtained is better with 8 mm rib.

Keywords— Triple concentric tube heat exchanger, Rib, C-H-N, co-current flow, ANSYS Fluent

I. INTRODUCTION

Heat exchanger is a device which is used to transfer heat between a solid object and a fluid, or between two or more fluids separated by a wall to prevent mixing of the fluid. The performance of the heat exchanger generally depends on the various physical characteristics of the fluid and the material. There are several kinds of heat exchangers are used in industry such as plate type heat exchanger, shell and tube heat exchanger, double pipe heat exchanger, helical tube heat exchanger etc. The type of heat exchanger to be used is determined by the process and product specification. Nevertheless, concentric tube heat exchanger plays a major role in fulfilling the needs of heat exchanger in food industry. The most commonly used heat exchanger is double pipe heat exchanger which consists of one pipe inside another pipe placed concentrically. It is used in different products such as dairy, food, beverage and pharmaceutical industries. There are some disadvantages of this exchanger and to overcome this, there is need to enhance the performance of double pipe heat exchanger.

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