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Design and Construction of Nitrogen Liquefier
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 Title & Authors
Design and Construction of Nitrogen Liquefier
Choudhury, B.K.; Sahoo, R.K.; Sarangi, S.K.;
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The design and construction of nitrogen liquefier begins with the process design of the cycle. The simulation of the cycles has been done using the software Aspen HYSYS. The compressor unit is available in the laboratory. Two number of high effectiveness, vacuum brazed aluminum plate fin heat exchangers are designed and fabricated. Turboexpander is designed and all of its components are fabricated. A suitable modification has been done with a precession needle valve to operate as a long stem JT valve. For separating the liquid, a phase separator is designed and fabricated. All the components are assembled inside a double walled cold box with pipes as per the process need. The necessary pressure, temperatureand other measuring instruments, valves and safety devices are mounted on the liquefier. After successful running of the liquefier, for the mass flow rate of 296 kg/hr for gaseous nitrogen, it is expected to deliver 17.44 lit/hr of liquid nitrogen.
Cryogenic liquefaction;Turboexpander;Nitrogen liqurfier;
 Cited by
Alur, S. A., Choudhury, B. K., Sahoo, R. K., and Sarangi, S. K., 2010, Simulation of Turboexpander Based Nitrogen Liquefier., Proceedings of the 20th National and 9th International ISHMT-ASME Heat and Mass Transfer Conference, January 4-6, Mumbai, India.

Venkatarathnam, G., 2008, Cryogenic Mixed Refrigerant Processes. Springer-Verlag New York Inc.

Choudhury, B. K., Alur, S. A., Sahoo, R. K., and Sarangi, S. K., 2012 Optimization Analysis of Liquefaction Cycles for Nitrogen, Indian Journal of Cryogenics, volume 37No(1-4), pp 34.

Maiti, D. K., 2002, Heat Transfer and Flow Friction Characteristics of Plate Fin Heat Exchanger Surfaces - A Numerical Study, Ph.D. thesis.

Manglik, R. M., and Bergles, A. E, 1995, Heat Transfer and Pressure Drop Correlations for the Rectangular Offset Strip Fin Compact Heat Exchanger Experimental Thermal Fluid Science 10, 171-180. crossref(new window)

Joshi, H. M., and Webb, R. L., 1987, Heat Transfer and Friction of the Offset Strip-fin Heat Exchanger. Int. J. Heat Mass Transfer, 30 (1), 69-84. crossref(new window)

Aspen Muse Reference guide. Aspen Technology, Inc. Cambridge, Massachusetts, Vol. V2006,

Choudhury, B. K., Sahoo, R. K., and Sarangi, S. K., 2014, Design of Backward Swept Turbine Wheel for Cryogenic Turboexpander, Journal of Engineering Science and Technology, V9(4).

Choudhury, B. K., Alur, S. A., Sahoo, R. K., and Sarangi, S. K., 2010, Design of High Expansion Ratio Turboexpander for Nitrogen Liquefier. Proceedings of the 3rd International Conference on Advances in Mechanical Engineering, January 4-6, S.V. National Institute of Technology, Surat, India.