Özet:

In this study, integration of appropriate renewable methods are going to be applied on conventional coal fired steam power plant which has 660 MW full load capacity and including 4 Turbines (1 HP,1 IP and 2 LP), one Benson type boiler and having multi pre heater stages for each unit. Steam parameters are 177 Bar and 541 o C super-heater section and 50 bar 539 o C for re-heater section. Primary fuel is coal except for startup and shut down operations. It is aimed by retrofitting some renewable energy methods on existing power plant, thus eliminating conventional type power plants adverse effects on thermodynamically, environmental and economic issues.  One of the most important issue of conventional steam power plant operation is waste heat recovery management. A widespread techniques has been developed on this topic. It's possible to handle low grade heat by considering thermodynamic and environmental facts and also dealing with restrictions and opportunities after fulfilled feasibility study. In this study, it is being proposed waste heat recovery by combining Organic-Rankine Cycle (ORC) with steam-Rankine cycle at available section. Brief summary of operation is ORC takes place after regenerative air preheater section and the target is to utilize waste heat of flue gas either via district heating or power generation up to few MW values. Depending upon the calculation and results additional modifications can further be needed as well.

Anahtar Kelimeler: