Energy and exergy assessment and parametric study of combination of MATIANT cycle with an organic Rankine cycle (non-emission)

Increasing energy demand is the main reason of designing the most efficient energy systems. Using fossil fuels to produce power in world with finite energy sources brings some problems in greenhouse gas control domain in addition to energy crisis. Since 1/3 emitted CO2 associated to human activities releases from power producing sections, oxy-fuel cycles are promising technology.Matiant cycle is one of the most well-known and developed oxy-fuel cycles where it is able to separate and capture the produced CO2 in combustion chamber. In order to propose efficient energy systems, combination of Matiant cycle with an Organic Rankine Cycle (ORC) studied from view of energy and exergy and also a parametric study carried out to show the most effective components in exergy destruction. Proposed combined cycle keeps the CO2 capturing quality of Matiant cycle besides increasing of its efficiency due to waste heat recovery. Energy and exergy efficiency of proposed cycle is 51.45 and 45.63% respectively. In exergy analysis domain, in addition to parametric study results of exergy efficiency and exergy destruction of each component has been outlined.