تحليل انرژي و اگزرژي و مطالعه ي پارامتريك چرخه ي تركيبي ماتيانت و رانكين آلي (بدون آلايندگي)

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

چرخه‌ي اوكسي‌ فيول MATIANT از جمله ي معروف‌ترين سيستم‌هاي توليد توان بدون آلايندگي مي باشد كه قابليت جداسازي و ذخيره‌ي تمام دي‌اكسيدكربن توليد شده در محفظه احتراق را دارد. در راستاي ارايه‌ي سيستم‌هاي توليد توان با راندمان بالا، در اين مطالعه تركب چرخه‌ي MATIANT و رانكين آلي از ديدگاه انرژي و اگزرژي بررسي شده است كه ضمن حفظ ماهيت بي‌آلايندگي چرخه، كارآيي آن را افزايش داده است. راندمان انرژي و اگزرژي چرخه‌ي پيشنهادي به ترتيب 51/55 و 45/72 درصد مي‌باشد كه در مقايسه با چرخه‌ي MATIANT افزايش قابل قبولي دارد.

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.