Comprehensive performance analyses and optimization of the irreversible thermodynamic cycle engines (TCE) under maximum power (MP) and maximum power density (MPD) conditions

Comparative performance analyses of irreversible OMCE (Otto Miller cycle engine)-DiMCE (Diesel miller cycle engine)-DMCE (Dual Miller cycle engine)

“…Gonca et al [42] investigated the heat transfer influences on the performance of an irreversible DMC (Dual-Miller cycle) engine. Gonca et al [43] performed a comprehensive study on the gas cycle engines well known in the literature and analysed the performance of them under MP and MPD conditions. Gonca and Sahin [44] optimized and compared the performance characteristics of the gas cycle engines.…”

Finite-Time Thermodynamic Modeling and a Comparative Performance Analysis for Irreversible Otto, Miller and Atkinson Cycles

“…The optimal dependence on rotational speed of these operation parameters was achieved in order to maximize efficiency under any power output. Some studies specially conducted the comparative analyses and performance optimizations among different thermodynamic cycles such as Otto, Miller and Atkinson [ 14 , 28 , 29 , 30 ]. Hou [ 30 ] compared the performances of Atkinson and Otto cycles.…”

“…It is found that the Atkinson cycle can achieve the highest output work and cycle efficiency while those for the Otto cycle are the lowest at the same running condition. Gonca et al [ 29 ] conducted comprehensive performance analyses and comparisons for air-standard thermodynamic cycle engines considering internal irreversibility based on some criteria such as MP. The thermodynamic cycles include the Otto cycle, dual-Atkinson, Otto–Atkinson, dual-Miller, etc.…”

“…In [ 31 ], Zhao et al demonstrated that the engine design parameters and cycle conditions had significant effects on the heat-transfer coefficient, thus the heat losses through the cylinder wall; and the boundary friction primarily related to the cylinder pressure also had non-negligible influences on the engine cycle performances. In comparative analyses of different thermodynamic cycles as in [ 14 , 29 ], the comparative results and change characteristics for the energy losses and performances may have significant differences from real engine processes if the heat-transfer and friction are not considered or only handled with simple relations. As a result, it is not capable of precisely clarifying the respective advantages and disadvantages of each thermodynamic cycle studied; and the comparative analysis studies may lose real meaning and cannot give correct guidance for the cycle selection and performance optimization of real engines.…”

Progress in Finite Time Thermodynamic Studies for Internal Combustion Engine Cycles

“…Considering IIL and HTL and fixing the cycle maximum temperature, Zhao and Chen [235] derived the power output and efficiency performance characteristics of an irreversible Miller cycle, and investigated the influences of the two losses on cycle performance. Based on MP, ME and MPD performance criteria, Gonca et al [236] optimized the performance of an irreversible Miller cycle with IIL and investigated the influences of design parameters (including CR, pressure ratio, stoke ratio and temperature ratio) on cycle performance. Considering HTL, FL and IIL, Ge [84] used an AS cycle model to replace an open cycle model, established an irreversible Miller cycle model, computed the entropy generation rate generated by various losses, studied the cycle optimum EF performance, and investigated the influences of the three losses on cycle EF performance.…”