WASTE HEAT FROM SUGAR INDUSRTY TO DRIVE VAPOUR ABSORPTION ACS

Abstract

The demand for Air conditioning keeps rising, especially in developing countries where the standard of living has improved. This Results in an increased consumption of electricity and put further pressure on the power grid. Agro industry plays a crucial role in the industrialization process of developing countries. Sugar industry is second largest agro industry in the world. In sugar manufacturing plants there are various processes for production of sugar i.e. extraction of juice, clarification, evaporation, concentration of juice, forming and separating crystals etc. These processes consume energies in the form of mechanical energy, electrical energy and heat energy. So there are various sources of waste heat in sugar factory i.e. waste heat from hot flue gasses, hot water from evaporative body and boiler blow down. The large amount of waste heat passes from various devices of sugar factory causes decrease in the efficiency of sugar plants, and also increase the Global Warming which is very dangerous for our environment. Most of the energies are utilized by the industries due to depletion of fossil fuels and increasing the fuel price to exploit the maximum presented energy from the waste heat source. The sugar industry exhausts excess water carry a considerable amount of thermal energy. This energy can be set in to positive use as a heat source for vapour absorption system to serves as cooling system. The Identified excess water has a mass flow 10 kg/s and a temperature range of 70-95 C which is enough to provide cooling to factory office area. .The Result of the investigation also showed that the industry could invest in thermally driven cooling system with a payback time of between three to six years depending on the cost of the selected equipment. The Energy savings per crushing season would be nearly 64314kWh which equals to financial savings of above Rs.529304.22 per season.