COMPREHENSIVE THERMODYNAMIC INVESTIGATION OF ALL 3-PROCESS, WORK-PRODUCING CYCLES FOR NON-REACTING PERFECT GASES.

ABDEL-RAHIM, Y. M.; NASSIB, A. M.

doi:10.21608/asat.1985.26517

COMPREHENSIVE THERMODYNAMIC INVESTIGATION OF ALL 3-PROCESS, WORK-PRODUCING CYCLES FOR NON-REACTING PERFECT GASES.

Document Type : Original Article

Authors

Lecturer, Dept. of Mechanical Engineering, Assiut University, Assiut, Egypt.

10.21608/asat.1985.26517

Abstract

This paper investigates the thermodynamic performance of all 3--process, work-producing cycles for non-reacting perfect gases. Out of. the 18 possible combinations of cycles composed of 3 processes, there are only 8 cycles which can produce work. The analysis studies the effect of cycle parameters on cycle performance. The performance is reflected by the first and second law efficiencies n/ and :III and dimensionless heat and available energy input gin(=Qin/cv Tmin) and ain(=Ain/cv Tmin) respectively. The parameters in dimensionless form are: compression ratio r(=maximum to minimum volume ratio), specific heat ratio k, minimum to ambient temperature ratio Tmin/To, maximum to minimum temperature and pressure ratios Tmax/Tmin and Pmax/Pmin respectively. The study shows that in the suggested practical range of application (r < 30, Tmax/Tmin 10,Pmax/P min < 100 and Tmin/T0=1.0) ni and n11 vary between 20 to 72% and 25 to 100% respectively. The analysis methodology presented here could be a main tool in the performance investigation and design of more complicated cycles.