EXERGY AND ENERGY ANALYSIS OF SUGAR INDUSTRY

Abstract

Now a days, the energy crisis is increasing day by day. Increasing oil and gas prizes make the Indian economy vulnerable to various unwanted phenomenon. Thus it becomes important to use energy resources efficiently and effectively. In a country like India which imports a major portion of its energy resources from other countries, this is the need of the hour to use resources more effectively and efficiently. Energy is a fundamental concept of thermodynamics and one of the most significant aspects of engineering analysis. The basic method to estimate the energy system performance is based on the First law of thermodynamics. It simply involves the heat-balance method of analysis and simply called energy analysis. However, exergy is the maximum amount of work, which can be extracted by a system or a matter or energy as it comes to equilibrium with a reference environment. Exergy is consumed or destroyed due to irreversibility in any real process. The "exergy analysis" approach is based on second law of thermodynamics and it involves the reversibility and irreversibility of the processes. By this approach it is possible the find out the points where potential exergy loss occurs. For better utilization of energy during the sugar production processes, it is important to take into account the quantity and quality of energy. There is a wide scope for the energy conservation in the sugar industries. In the sugar industries the biomass residue i.e. bagasse is an important source of energy. To generate power from the bagasse, cogeneration plant is employed in the sugar industries. In present work, first and second law analysis of raw juice production and juice clarification unit have been carried out along with the analysis of cogeneration boiler system. For this work "MIs Triveni Engineering and Industries", Deoband (Dist: Saharanpur), Uttar Pradesh, India, has selected for the analysis. The objective of this work is to find the points where significant energy loss occurs, to make recommendation to minimize them and to carry out the cost analysis of the mitigation measures. First law efficiency of raw juice production unit, raw juice clarification unit and boiler of cogeneration system is 83.06%, 80.66% & 66.37% respectively and second law efficiency of these units is 59.29%, 71.22% & 45.72% respectively. Cost analysis of mitigation measures have been done and payback period for the investment is 20 days.