Q2. Why was a constant convective surface heat transfer coefficient chosen?
Due to the assumption of external forced convection provided by an approaching wind, a constant convective surface heat transfer coefficient was chosen.
Q3. What is the requirement for accuracy when modeling naturally convective flow?
The requirement for accuracy when modeling naturally convective flow is that the pressure variation should be insignificant when compared to temperature variation.
Q4. What are the main types of CSP plants that exist or are currently in development?
The main types of CSP plants that exist or are in various stages of development and research are: Parabolic Trough Collector (PTC), Parabolic Dish Reflector (PDR), Heliostat Field Collector (HFC), and Linear Fresnel Reflector (LFR).
Q5. What is the main heat loss contributor in the cavity?
radiation remains the dominant heat transfer mechanism in the whole cavity and therefore also the main heat loss contributor.
Q6. What is the boundary intensity for a non-gray opaque wall?
At the wall, the boundary intensity for all outgoing directions in a specific band λ∆ is given byλ∆π λ λ ,out0 q The author= 16It should be considered that for a non-gray diffuse semi-transparent wall, the heat flux on the two sides of a medium is calculated using equations 14 and 15 for each medium, while the incident intensity Iin is calculated from a complicated mathematical equation (omitted for brevity), which is related to the refractive indices for the media.
Q7. What was the spatial discretization of the equations for pressure, momentum, energy and discrete?
The spatial discretization of the equations for pressure, momentum, energy and discrete ordinates was chosen as PRESTO, second-order upwind, second-order upwind, and first-order upwind, respectively.
Q8. How is the aperture size held fixed?
In addition, the aperture size is held fixed at 1231.3mm to satisfy the condition of a given optical system having almost constant intercept factors and a fixed overall output in the optical domain.
Q9. How many iterations of the coupled mass, momentum and energy equation were used?
The RTE was solved every 10 iterations of the coupled mass, momentum and energy equation set in order to allow the adjusted radiation heat source to influence the flow in the domain.
Q10. What is the definition of a surface that acts as specular?
if the root mean square (RMS) surface roughness is less than incident radiation wavelength, then the surface acts as specular (Bennett and Porteus, 1961), else it acts as diffuse.
Q11. What is the effect of the external shape on the wind load?
The external shape directly influences the wind load (according to Bhaduri and Murphy (1985), the projected area (Figure 4) is directly proportional to the wind load on low-height structures with a height-dependent velocity coefficient also playing a role.
Q12. What is the net loss of radiative energy from a control volume?
As mentioned by Modest (2013), from a physical viewpoint, the net loss of radiative energy from a control volume is equal to emittance of energy from that volume minus the absorbed incident radiation to it.