S.K. Tyagi, J. Chen, S.C. Kaushik, and C. Wu
Modified Brayton cycle, intercooling, isothermal heat addition, regeneration, irreversibility, optimum design
The irreversible cycle model of a regenerative intercooled modified Brayton cycle heat engine has been established for the finite heat capacities of external reservoirs. The power output has been optimized with respect to the cycle temperatures and the optimum performance parameters are calculated for a typical set of operating condition. It is found that there are optimal values of the intercooling and cycle pressure ratios as well as the turbine outlet temperature at which the cycle attains the maximum performance but the optimal values of these parameters are different for different cycle parameters such as the intercooling and cycle pressure ratios, turbine outlet temperature, etc. Moreover, the design problems of some important parameters are discussed in detail, and consequently, the optimum criteria for the intercooling and cycle pressure ratios and the turbine outlet temperature are obtained. The results obtained here are general and some important conclusions in the relevant references may be directly derived from this paper.
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