The results show that the steady-state mass flow rate changes with the heat transfer regularly both in the single-phase and flashing-induced two-phase flow under a certain inlet subcooling.
We also observed that at certain inlet conditions, high amplitude velocity and heat release fluctuations coexist even without pressure-heat release coupling, meaning that the Rayleigh criterion is not necessarily associated with the onset of the self-excited instability.
Detail analysis of the temperature and humidity ratio distributions and boundary conditions, characterizing the coupled heat and mass transfer process in each of these determined zones, revels the violation of the Lewis relation unity under a certain inlet and operation conditions.
The advantage of the Kalina cycle over the ORC is that the abovementioned mixture boils at variable temperatures, which in turn creates higher efficiency at a certain inlet temperature, unlike the pure chemicals that are used in ORC (Clauser 2006).
It can be seen that for a certain inlet temperature (T fi = 80°C or 20°C), the overall flow rate has some influence on the flow distribution, i.e., nonuniformity decreases with decreasing flow rate (as shown by Fan et al.[4] and Weitbrecht et al.[11]).[11]
The predictions show that the process will produce useful gases for certain air inlets.
At a certain fuel inlet velocity, the measurements indicate that the flame exhibits local extinction at 20 diameters from the fuel nozzle and subsequent downstream relighting.
The results show that the heat transfer coefficient per unit pressure drop of shell-and-tube heat exchangers with helical baffles increases firstly and then decreases with the increase of helical angle, and decreases with the increase of overlapped degree under certain shell-inlet velocity.
It was shown that for a certain range of inlet Reynolds numbers, inlet turbulent kinetic energies and channel wall temperatures, a simpler laminar model was sufficient to capture key CST characteristics such as catalytic fuel conversion and onset of homogeneous ignition, while standard LR turbulence models overpredicted substantially the former and could not reproduce the latter.
In certain regions of inlet concentration multiple temperature fronts have been observed.
