Research on the Techno-Economic Analysis and Evaluation Method in Waste Heat Power Station
|School||Hebei Union University|
|Course||Thermal Power Engineering|
|Keywords||waste heat power station exergy analysis comprehensive evaluation method index weight all operating conditions model selection|
The waste heat resources are huge in the iorn and steel industry, waste heat power station is especially featured in the full utilization of waste heat and the implement of heat and power cogeneration, which is the best scientific convert project concerning industrial waste heat and the best way to conserve energy and cut emission. But the existing power station techno-economic evaluations are universally defect in their monotonous evaluation index and one-side evaluation method.Waste heat power station is taken the circular cooler of Wusteel as the research object, VB program is used and calculated the thermodynamic system. The rated power of 29.31 MW is worked out, which is fitting the design power of 29.14MW, the reasonableness of model selection in Wusteel is demonstrated. Then the influence of the main steam temperature and main steam pressure on net power output is analyzed, and the installed capacity is confirmed. All operating conditions in CDQ power station of Tangsteel are carried out the energy balance calculation and comparative analysis. The results show that exergy-balance analytical method has a more objective and comprehensive reflection of various losses. Meanwhile, the thermal circulation system is collaborative analysed in CDQ power station. Through establishing comprehensive evaluation index system and evaluation method, it conducted example analysis and evaluation on Wusteel and Tangsteel. By adopting yaahp software to calculate weights, the generated index in circular cooler waste heat power station is 19~23 kWh·t-1, and CDQ power station is 70~83 kWh·t-1.The results indicate that comprehensive evaluation index system and evaluation method have applicability for high-medium temperature waste heat power station. The results provide rational decision-making on optimized design and efficient operation of the power station, and provide the reference evidence for the technological management of power station and decision-making of early stage project.