Informatics Publishing Limited

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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B. Dinesh Babu ¹, R. Vidya Sagar Raju ¹, K. Thirupathi Reddy ¹

Affiliations
1 School of Mechanical Engineering, R.G.M.C.E.T., Nandyal, Andhra Pradesh, IN
2 School of Mechanical engineering, R.G.M.C.E.T., Nandyal, Andhra Pradesh, IN

Abstract

The depleting fossil fuel resources, increases the price of fuel continuously. At one point of time the whole resources may come to end. Keeping this in view many researchers identified various alternative fuels and tested successfully. In the present investigation the performance and emission characteristics of single cylinder four stroke direct injection diesel engine using rubber seed oil(RSO) as an alternate fuel is evaluated. Here rubber seed oil is used in the form of blends at various proportions with diesel. High viscosity is one important difference between rubber seed oil and commercial diesel fuel. Bio-diesel is prepared from rubber seed oil using double Transesterification process. A single cylinder, four stroke, constant speed, water cooled, direct injection diesel engine is used for the experiment. The performance of the engine is measured using rope brake dynamometer and the emissions such as CO ,CO2, HC&Nox is measured using exhaust gas analyzer. The experimental data for various parameters such as thermal efficiency, brake specific fuel consumptions (BSFC) are analyzed. Acceptable thermal efficiencies of the engine were obtained with blends containing upto B30 of rubber seed oil biodiesel blend.

Keywords

Alternative Fuel, Biodiesel, Rubber Seed Oil, Engine Performance.

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