Statistical Methods Application for Estimation of Unit Costs in a Cogeneration Plant Sugar Industry
Vindhya1, Sunil Kumar2, Madhuraj3

1Vindhya, Professor. M.Tech. Scholar Department of Electrical Egg. IEC College of Engg. and Tech., Greater Noida, India.
2Sunil Kumar, Professor and Head, Department of Electrical Engg.IEC College of Engg., and Tech., Greater Noida, India.
3Madhuraj, Assistant Professor, Department of Electrical Engg., KVN Naik IEER, Nashik, India.
Manuscript received on September 15, 2014. | Revised Manuscript received on September 22, 2014. | Manuscript published on September 25, 2014. | PP:14-18 | Volume-2 Issue-11, September 2014. | Retrieval Number: K08080921114

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Abstract: India is currently largest producer of Cane-Sugar in the world accounting for 10% of the world production. Most Cane –Sugar factories have been designed to be energy selfsufficient with sugar as the Primary product. With the recent trend toward diversification in the Cane-Sugar Industry, a growing no. of factories are manufacturing one or more byproducts (such as alcohol or cogenerated electricity for export to the utility grid) in addition to Sugar and Mollases. Cogeneration is the concept of producing two forms of energy from one fuel. One of the forms of energy must always be the heat and the other may be electricity or mechanical energy. A method for establishing unit costs of delivered steam and electrical energy is presented. This method employs the use of least squares, based on a linear model of electrical energy generation and delivered steam as functions of generated boiler steam. A discussion of the accuracy of the method is presented as well as an example of the use of the method using four months of actual plant production. An excel program is discussed for solving the solution of simultaneous equation generated after least squares approximations. Accordingly comparision among all the adopted methods are carried out. This helps in betterapproximation for evaluation of per unit cost for a cogeneration system , which is further used for determining the correct pay-back period of the plant.
Keywords: Cogeneration, costs, least squares methods, steam generation, steam turbines, surface fitting.