APPLICATION OF A NOVEL THERMO-ECOLOGICAL PERFORMANCE CRITERION: EFFECTIVE ECOLOGICAL POWER DENSITY (EFECPOD) TO A JOULE-BRAYTON CYCLE (JBC) TURBINE

Abstract

This study presents anapplication of a new performance analysis criterion named as EffectiveEcological Power Density (EFECPOD) to a Joule-Brayton cycle (JBC) turbine. Theturbine performance is expressed a single value by the proposed criterion usingeffective efficiency, effective power, cycle temperature ratio and volume. NOxformation and turbine dimensions are considered by the cycle temperature ratioand turbine volume, respectively. The turbine volume is also related toproduction cost of the heat engine. Therefore, the proposed criterion isessential for multi purpose optimization. Furthermore, this criterion can bedeveloped and applied to the other gas cycle and heat engines. Also, theinfluences of engine design parameters such as cycle temperature ratio,pressure ratio, turbine speed, and equivalence ratio on the EFECPOD have beenexamined based on Finite-Time Thermodynamics Modelling (FTTM). In order toobtain realistic results, temperature-dependent specific heats for workingfluid have been used and heat transfer and exhaust output losses have beentaken into consideration. The results presented could be an essential tool forJBC turbine designers.