Analysis of entropy generation and exergy efficiency of the methane/dimethyl ether/air premixed combustion in a micro-channel

Analysis of the Effects of Structural Parameters on the Thermal Performance and System Stability of Ventilation Air Methane-Fueled Reverse-Flow Oxidation Reactors

“…A closer examination of this figure shows that the regenerator temperature finally oscillates in a limit cycle form, meaning that the system has achieved a new stable mode. This is desirable in terms of maximizing fuel utilization [41,42]. Nevertheless, as β is further elevated to 5/5, the regenerator temperature is shown to be decreasing, reaching as low as 700 K if the operation time reaches 6000 s. Furthermore, as far as the maximum and mean temperatures of the regenerator are concerned, increasing β is shown to first increase and then decrease them, with the highest value occurring at β = 4/6.…”

“…Processes 2024, 12, 1193 10 of 18 [41,42]. Nevertheless, as β is further elevated to 5/5, the regenerator temperature is shown to be decreasing, reaching as low as 700 K if the operation time reaches 6000 s. Furthermore, as far as the maximum and mean temperatures of the regenerator are concerned, increasing β is shown to first increase and then decrease them, with the highest value occurring at β = 4/6.…”

CH4/air combustion in a microscale recirculating heat exchanger: Sizing design using the heat transfer approach

“…An exergy and entropy analysis is also carried out by the team in a methane/ dimethyl ether/air premixed combustion in a microchannel. 27 From the list of chemical reactions, a single step is identified that contributes to maximum entropy generation. Higher exergy efficiency can be achieved at high velocities and blending ratio.…”

Numerical simulation of premixed n-heptane/air combustion in micro tube with internal channel optimization

“…In recent years, the urgent research point in micro-combustion is the resolution of two key issues: flame instability and conversion efficiency. The micro-combustor is primarily based on a tube and plate as the basic model, and various optimization measures have been employed to address these challenges [ [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] ]. Ziqiang He et al [ 28 ] conducted a comprehensive investigation into an integrated thermoelectric generation process based on the disc-combustor with plates.…”