International Journal of Engineering Research

R. Madhu Kumar ¹, V. Nageswar Reddy ¹, B. Dinesh Babu ¹

Affiliations
1 Mechanical Engineering Department, R.G.M. College of Engineering & Technology, Nandyal, Kurnool, A.P., IN

Abstract

Refrigeration plays an important role in developing countries, primarily for the preservation of food, medicine, and for air conditioning. Conventional refrigeration systems are using Freon as refrigerant. As they are the main cause for depleting ozone layer, extensive research work is going on alternate refrigeration systems. Vortex tube is a non-conventional cooling device, having no moving parts which will produce cold air and hot air from the source of compressed air without affecting the environment. When a high pressure air is tangentially injected into vortex chamber a strong vortex flow will be created which will be split into two air streams. It can be used for any type of spot cooling or heating application. In this paper, vortex tube with cylindrical and conical hot tubes performance is compared. It was found that the vortex tube with a conical angle of about 2.5° surpassed the cylinder tube by 25%∼30% in COP. The conical vortex tube reaches the same or more performance than the normal tube but with a smaller length.

Keywords

Ranque-Hilsch Vortex Tube, Temperature Separation, Flow Visualization, Geometrical Parameters.

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V. Nageswara Reddy ¹, R. Madhu Kumar ¹, R. Vidya Sagar Raju ¹

Affiliations
1 School of Mechanical Engineering, RGMCET, Nandyal, IN

Abstract

At present, about 80% of the world's demand for transportation fuels- road, rail, air and sea- are met by derivatives from the fossil fuels such as petroleum and diesel. This project aims at finding an alternative for these fossil fuels. The various parameters that have been considered for the selection of the oil are kinematic viscosity, viscosity index, calorific value, flash point, fire point, sulphur content, carbon content, pour point, and density etc. The various properties of the oil was tested at M/s Industrial testing and analysis laboratories, Chennai. The oil was then converted to biodiesel using trans-esterification process. This transesterification process was carried out at the Central Leather Research Institute, Chennai. The first step consisted of testing and analysis of the performance and combustion characteristics of diesel, the rice bran oil, ethyl ester of rice bran oil and various blends of both these oils with diesel. This step also consisted of measuring and observing the emission characteristics with the help of a Bosch smoke meter. The final step consisted of evaluating and comparing the performance, combustion, and emission characteristics of the fuels with one another with the help of graphs.

Keywords

Helical Coil Tube Heat Exchangers, Parallel Flow, Counter Flow, Flow Rate of Cold Water, and Number of Turns in Helical Coil.

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