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D. Mohan ¹, K. Sathiya Moorthy ¹, S. P. Sundar Singh Sivam ¹, S. Rajendrakumar ¹

Affiliations
1 Department of Mechanical Engineering, SRM University, Kattankulathur - 603203, Kancheepuram District, Tamil Nadu, IN

Abstract

Objectives: This study investigates the variation of heat transfer parameters using wavy fin located in the plate heat exchanger. Methods/Statistical Analysis: Velocity and temperature relations, fanning friction factor for iso-temperature and Colburn factor are evaluated for different flow rates of Reynolds Number from 200 to 2000 and its various fin pitches within 9 mm respectively. Similarities were found between this experimental data and semi empirical correlations of Plate Heat Exchanger. Findings: The various parameters are evaluated using this experimental setup and we obtained the optimum j/f for swirl flow regime with Reynolds Number of around 200 to 210. The general correlations for friction factor and Colburn factor were derived by multiple linear regression analysis. Application/Improvements: This studies show the periodic growth of parameters in the wall region of cross section of cross flow heat exchanger. Also we obtained the higher heat transfer co-efficient by using wavy fin with reasonable pressure fall.

Keywords

Correlations, Heat Transfer, Plate Heat Exchangers, Wavy Fins.

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K. Sathiya Moorthy ¹, S. P. Sundar Singh Sivam ¹, Prithvi Shivashankar ¹, S. Adithya ¹

Affiliations
1 Department of Mechanical Engineering, SRM University1-4, Kancheepuram District, Kattankulathur - 603203, Tamil Nadu, IN

Abstract

Objectives: To increase the efficiency and the power output of the Energy recovery system. Methods/Statistical Analysis: A nozzle of suitable material is installed above a cooling tower of a certain height. The nozzle is used to improve the speed of the exhaust air coming out of the cooling tower exhaust. A horizontal axis wind turbine is placed over the top of the nozzle such that it is parallel to the cooling tower. The wind turbine selected is of a size slightly less than the outlet of the nozzle. Findings: A five blade wind turbine is selected as it can minimize the air wastage. The nozzle outlet diameter is slightly less than the nozzle inlet diameter so as to increase the speed at which the exhaust air flows. The turbine rotates at a much higher speed when a nozzle is attached. The performance of the wind turbine with the help of a nozzle is improved. Application/Improvements: The performance of the system is tested in the laboratory with the help of a prototype design.

Keywords

Cooling Towers, Exhaust Fan, Nozzle, Power, Velocity, Wind Turbine.

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S. P. Sundar Singh Sivam ¹, V. G. Uma Sekar ¹, K. Saravanan ², S. RajendraKumar ¹, P. Karthikeyan ¹, K. Sathiya Moorthy ¹

Affiliations
1 Department of Mechanical Engineering, SRM University, Kattankulathur, Chennai - 603203, Tamil Nadu, IN
2 Department of Mechatronics Engineering, SRM University, Kattankulathur, Chennai - 603203, Tamil Nadu, IN

Abstract

Objectives: To study the yield behavior and plastic flow of an anisotropic sheet metal during forming operations, various mathematical formulations of the plastic state of the sheet metals have been proposed, known as yield functions. Different yield functions pertain to different criteria and have different characteristics. Methods/Statistical Analysis: There are several yield criteria proposed for the study of yield behaviors of sheet metals. This paper aims at reviewing the most frequently and commonly employed for the purpose yield criteria i.e. Hill 1948, Barlat 1989, Hill 1990 and BBC 2000. The study is focused on discussing the form of each criterion, their implementation details and comparing their predictive accuracies. Findings: The methods followed to obtain the yield surface diagram have been reviewed and discussed. Application/Improvement: Inference has been drawn based upon the agreement between theoretical and experimental value for a particular case.

Keywords

Accuracy Index, Anisotropic Coefficients, Yield Criteria.

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