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IDL - International Digital Library Of Technology & Research Volume 1, Issue 5, May 2017

Available at: www.dbpublications.org

International e-Journal For Technology And Research-2017

An approach to reduce cooling water consumption in thermal power plant by vapor absorption refrigeration plant using Taguchi L9 orthogonal analysis AsimMahapatra1,Bishal Dey2 1

Asst. Professor, Department of Mechanical Engineering, Jalpaiguri Govt. Engineering College Post Graduate Scholar, Department of Mechanical Engineering, Jalpaiguri Govt. Engineering College Jalpaiguri, India 1 bishaldey92@gmail.com

2

Abstract:

Low water levels in feeder canals of thermal power plants causes shut down of power generations for a few days in the last few years. Apart from that the „Central Electricity Authority‟ produced a report on minimizing the overall water requirement of coal based thermal power stations, and as the report tells that a major proportion of the total water requirement of the power stations is the cooling water used.In this paper we made an attempt to perform a thermodynamic study and analysis of a 250 MW thermal power plant, to reduce the mass flow of cooling water by decreasing its temperature with the help of solar powered refrigeration system. So, here we are going to study an analytical mathematical model of a vapor absorption refrigeration system, and we will try to optimize it‟s control parameters using Taguchi L9 orthogonal array. where the cooling water coming from the cooling tower enters into a solar refrigeration system before entering to the condenser of the power plant. , and we will try to optimize it‟s control parameters using Taguchi L9 orthogonal array. As the temperature of the cooling water drops down because of the refrigeration system, the overall requirement of cooling water reduces. A mathematical model of amount of cooling water flow per second is made in this paper using Taguchi analysis.

IDL - International Digital Library

1|P a g e

Keywords: Cooling Water, Thermal Power plant, Solar refrigeration, Vapor absorption refrigeration, power generation, Taguchi L9 analysis.

1. INTRODUCTION A thermal power station is a power plant in which heat energy is converted to electric power. In most of the places in the world, as well as in India the turbine is steam-driven. Water is heated, turns into steam and spins a steam turbine which drives an electrical generator. After it passes through the turbine, the steam is condensed in a condenser and recycled to where it was heated; this is known as a Rankine cycle. Now this is a big deal to condense the steam (working fluid), because this needs a large amount of cooling water to take away that large amount of heat from steam. But the cooling water is recycled through Cooling Tower. Cooling towers are a very important part of many chemical plants. The primary task of a cooling tower is to reject heat into the atmosphere. They represent a relatively inexpensive and dependable means of removing lowgrade heat from cooling water. The make-up water source is used to replenish water lost to evaporation. Hot water from condenser is sent to the cooling tower. The water exits the cooling tower and is sent back to the condenser for further cooling. Now, the amount of Copyright@IDL-2017


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