Title of article :
Simulation and exergy evaluation of a MED unit based on waste heat recovery from a gas turbine unit
Author/Authors :
Khanmohammadi, Shoaib Department of Mechanical Engineering - Kermanshah University of Technology, Kermanshah, Iran , Kizilkan, Onder Department of Mechanical Engineering - Faculty of Technology - Isparta University of Applied Sciences, Isparta, Turkey , Duc Nguyenc, Dinh Department of Environmental Energy Engineering - Kyonggi University, Gwanggyosan-ro, Yeongtong- gu, Suwon-si, Gyeonggi-do, South Korea
Abstract :
Integrating MED-TVC unit with gas turbine cycle (GTC) and
organic Rankine cycle (ORC) can be an effective way to take
advantage of the hot exhaust gas of gas turbines. In this study,
a multi-product system consisting of GTC, MED-TVC, and ORC
is investigated. The energy and exergy analysis is carried out
and influences some design variables such as inlet air
temperature of air compressor, air compressor pressure ratio,
high pressure in ORC, pinch point temperature difference, the
pressure of motive steam, and TVC compression ratio on the
developed system are examined. Calculation shows that the
developed unit can produce 39.6 MW of power and 137.3 kg/s
of fresh water with a gain output ratio of 4.41 and energy
efficiency of 21.5%. According to the result, precooling the air
at the entrance of the air compressor and decreasing the pinch
point temperature can lead to enhancement exergy and
energy efficiency of GTC and the gain output ratio of MED unit,
respectively. In addition, the highest exergy destruction takes
place in the combustion chamber and desalination unit.
Keywords :
Exergy , Desalination , Multi-Effect , Freshwater , Heat Recovery
Journal title :
Energy Equipment and Systems
