Energy and exergy analyses of a waste heat recovery spray dryer at ceramic sector

Ceramic sector of turkey, which developing industry has significant role. Especially, it is greater added value in terms of export and employment for economics. Most important cost factor is energy cost because of ceramic sector has energy-intensive process. Approximately, the energy has a proportion of %30 for overall cost of ceramic sector , electric and natural gas have this ratio %10 and %20 respectively. Especially, it is disadvantage for ceramic sector due to used naturalgas at firing and dryer are received to be import. Because of all these, high energy efficient use of ceramic produc tion will not only cause our companies to compete effectively in the global market but also help to cope with the current account deficit. Gases at high temperature are throwed out at process of ceramic sector.kilns have a biggest potential for all process at ceramic production. During the proses, it is supported preheating utilizing waste heat at other phase of production.with waste heat recocery, it could be save energy and have decreasing emission (CO2). The aim of this study to research effect of efficient and consumption naturalgas, it is made thermodynamical and economical analyses of result with waste heat recovery system. At this study, the waste heat recovery project was applied at sprey dryer of ceramic plant, located in Usak Industrial Park. With result, both energy and exergy analysis before waste heat and after waste heat were presented. The economical analysis was presented by net present value method and the payback time of he investment was calculated. As a consequences, after waste heat recovery system, energy efficient increased from %52,97 to %53,4 and exergy efficient increased from %39,46 to %41,24. Findings showed that approximately %29 of the total input natural gas could be recovered. The payback time of the system was calculated by net value method was 11 months.