Dynamic similarity in solar chimney modeling

Performance Analysis of an Updraft Tower System for Dry Cooling in Large-Scale Power Plants

“…Note that T a is the air temperature outside the tower, not necessarily the temperature of the tower outlet (state point 10), which should be higher. For T 10 , as reported by previous research [21,22], the temperature change across the chimney can assumed to be small, and thus:…”

“…Padki and Sherif developed a simple analytical model for a constant-diameter tower by using a momentum balance and assuming the Boussinesq approximation was valid to calculate the air velocity and kinetic energy at the outlet; the power output was assumed equivalent to the kinetic energy. Bernardes et al studied the power output using a model that balanced the pressure potential and theoretical maximum volume flow rate at the tower inlet under a no-load condition to obtain the pressure drop and the volume flow rate at the updraft tower inlet; the same method was adopted by Koonsrisuk and Chitsomboon and Zhou et al [20][21][22]. Pastohr et al calculated the temperature and flow field in the solar updraft tower numerically [23].…”

Solar Chimney Power Plants – Developments and Advancements

“…Boussinesq approximation and Discrete Ordinate radiation model (DO) were introduced in the model and simulations were carried out. (Koonsrisuk & Chitsomboon, 2007) proposed the use of dimensionless variables to conduct the experimental study of flow in a small-scale SCPP for generating electricity. The similarity of the proposed dimensionless variables was confirmed by computational fluid dynamics.…”

“…Notwithstanding the difference between the heat transfer coefficients, both approaches returned similar air temperature rises in the collector and therefore, comparable produced power. (Koonsrisuk & Chitsomboon, 2009) went on with their previous study, namely (Koonsrisuk & Chitsomboon, 2007), trying to maintain dynamic similarity between the prototype and its theoretical model keeping the same solar heat flux. They showed that, for the same heat flux condition, all dimensional parameter, except the roof radius, must remain similar.…”

Multi-Objective Optimization of a Solar Chimney Power Plant with Inclined Collector Roof Using Genetic Algorithm

“…A two-dimensional (2D) steady-state CFD simulation of the SCPP system was carried out by Pastohr et al [17]. Koonsrisuk and Chitsomboon [18] solved the conservation equations of mass, momentum, and energy in an SCPP using the FVM. Chergui et al [19] solved steady-state Navier-Stokes equations, as well as continuity and energy equations for a natural laminar convection in an axisymmetric system.…”