Exergy Analysis of Thermal Systems in a Paper Production Factory

Abstract

Combined cycle power plants have an important effect in the energy production sector today. In this study, the natural gas cycle power plant that meets the electrical and thermal energy needs of Hayat Paper Factory established in Çorum is discussed from a thermodynamic perspective. The facility consists of a gas turbine, a heat recovery steam generator (HRSG) directly connected to the gas turbine exhaust, and units used in paper production.
In the study, energy and exergy analyzes of gas turbine, HRSG and pulp cylinders were examined. As a result of these energy analyses, waste energy was determined. This is calculated to reuse waste energy and increase the energy efficiency of industrial production facilities. Outdoor air temperatures, pressure ratio of the gas turbine compressor and electrical energy efficiency were determined as 9.1 °C, 14.7% and 30%, respectively. In the production facility, the saturated steam need of the process is met by HRSG and the overall efficiency of the system is approximately 42.6%. The resulting steam is used in paper production systems. The 3094.85 kW exergy coming out of the HRSG is lost in total in the pipes and connection valves until it reaches the paper drying cylinders. Preventing these energy losses will increase the energy efficiency of the facility.