Waste-heat recovery potential in Turkish textile industry: Case study for city of Bursa E. Pulat, A.B. Etemoglu, M. Can * Uludag University, Faculty of Engineering & Architecture, Mechanical Engineering Department, Gorukle, TR-16059, Bursa, Turkey Received 18 June 2007; accepted 9 October 2007 Abstract Textile sector of Turkey has a large production capacity and it is one of the important sectors. Many industrial heating processes generate waste energy in textile industry. Therefore, there is a tremendous waste-heat potential to utilize in textile applications. This study assesses the potential of waste-heat obtained from particularly dyeing process at textile industry in Bursa where textile center of Turkey. Energy consumptions could be decreased by using of waste-heat recovery systems (WHRSs). A thermodynamic analysis is performed in this study. An exergy-based approach is performed for optimizing the effective working conditions for WHRSs with water-to-water shell and tube heat exchanger. The payback period is found to be less than 6 months. The variations of the parameters which affect the system performance such as waste-water inlet temperature, mass flow rate, cooling water inlet pressure and dead state conditions are examined respectively. The results of the analysis show that the exergy destruction rate and economical profit increase with increasing of mass flow rate of the waste water. Similarly, exergy destruction rate, effectiveness and economical profit increase while the second law efficiency decreases as the waste-water inlet temperature increases. # 2007 Elsevier Ltd. All rights reserved. Keywords: Waste-heat recovery; Energy analysis; Exergy analysis; Economical analysis Contents 1. Introduction ................................................................................. 663 2. Analysis .................................................................................... 667 3. Case study .................................................................................. 668 4. Parametric study and discussion ................................................................... 669 5. Conclusions.................................................................................. 671 Acknowledgement ............................................................................. 671 References .................................................................................. 671 1. Introduction Turkey is an energy importing country which over half of energy requirements met by imported fuels (natural-gas, oil, coal, etc.). For this reason, utilization of WHRSs seems to be a key concept for clean and sustainable future for the country. The investigations have been directed to technology develop- ment in the usage of waste-heat sources as a result of ever increasing in the Turkish energy demand associated with environmental factors. Bursa is an industrialized city where is located in the north- west of Turkey in the Marmara Region, 40.188N, 29.078E, 150 m altitude. Bursa is one of the fourth biggest city in Turkey and has an important share of energy consumption. There are many factors that have made city of Bursa into an important center succeeding Istanbul, factors such as the passage through Bursa of all routes connecting the Marmara Region to Aegean Region, the city being particularly the center of the country’s textile and automotive industry, the connection of agricultural production subsequently the development of the transport www.elsevier.com/locate/rser Available online at www.sciencedirect.com Renewable and Sustainable Energy Reviews 13 (2009) 663–672 * Corresponding author. Tel.: +90 224 442 88 16; fax: +90 224 294 19 03. E-mail address: can@uludag.edu.tr (M. Can). 1364-0321/$ – see front matter # 2007 Elsevier Ltd. All rights reserved. doi:10.1016/j.rser.2007.10.002