VAR

VAR

Primary and Secondary Steelmaking

Published in Vladimir B. Ginzburg, Metallurgical Design of Flat Rolled Steels, 2020

Vacuum-arc remelting (VAR) process - In this process, a steel electrode having a chemical composition about the same as that of the desired product is drip-melted into a water-cooled copper mold. Because of the high arc temperature and the small pool of liquid metal, it is possible to produce steel of dense crystal structure, low hydrogen and oxygen contents and with minimal chemical and nonmetallic segregation.

Optimisation of ecofriendly adsorption refrigeration system

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Journal Information

Published in International Journal of Ambient Energy, 2020

D. L. Belgin Paul, K. Mohan Babu, I. Irfan Ahmed, M. Karthick

Accadia and Rossi (1998) analysed the vapour compression refrigeration plant using exergetic cost theory. Misra et al. (2005) applied the theory of exergetic cost to the water-LiBr VAR system. It was understood from the literature that the minor variation in the working parameter brings drastic change capital investment and operating cost. Due to ozone layer depiction and global worming problem, the VAR systems are getting more and more popularity. But VAR systems are heat intensive and facing a problem of huge capital investment. Just like a power plant, the optimisation of VAR system by variation in working parameters can bring a major reduction in investment and operating cost. The major publications are available in the field of thermoeconomic analysis of water-LiBr and ammonia-water VAR systems but no literature is available in other working pairs of VAR system. As R134a-DMAC VAR system is one of the alternatives to ammonia-water and water-LiBr VAR systems, its thermoeconomic analysis is very much essential.

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Primary and Secondary Steelmaking

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