Amir Farhang Sotoodeh - Faculty of Energy and Environment, Niroo Research Institute (NRI)
Mehrangiz Ghazi - Department of Mechanical Engineering, Takestan Branch, Islamic Azad University, Takestan, Iran
Majid Amidpour - Department of Energy System Engineering, Faculty of Mechanical Engineering, K.N.Toosi University of Technology
Mehdi Nazarisarem - Department of Petroleum Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

In this paper, the constructal multi scale design and optimization of an offset-strip plate fin heat exchanger (PFHE) ispresented. In contrast with typical heat exchangers the constructal plate fin heat exchangers (CPFHE) consists of morethan one core and obeys constructal multi scale design. This paper deals with evaluation of performance of an offstripplate fin heat exchanger which consists of up to three construct. The continuous parameters of off-strip finsfacilitate the flexibility of the design. For better comparison all the heat exchangers will be simulated and optimizedat constant volume, heat transfer area and pressure drop and the objective function is to maximize energy recoverybetween streams. This will be carried out by geometric, hydraulic and thermal modeling of CPFHE. A recuperator ofa typical gas turbine cycle is chosen as case study to maximize the energy recovered from outlet flow gas to inlet airto the combustion chamber and optimization demonstrates considerable improvement in CPFHE rather than typicalPFHE.

plate-fin heat exchanger, constructal design, off-strip fins, optimization, energy recovery