Numerical and Experimental ......(21)

Numerical and Experimental Investigation of Building-Integrated Photovoltaic-Thermal Systems

 LITERATURE REVIEW

2.10 Inlet Effects绿色建筑博客 iGCwB]u!D

Many researchers provide models to simulate the heat transfer problem of the BIPV system, depending on the incident solar energy, ambient temperatures, and air flow velocity. In these models, the ambient temperature is often used as the inlet temperature. Therefore the heat transfer near the inlet region is often missed in the thermal modeling.绿色建筑博客1b
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Saelens and Roels (2004) studied the inlet effects for a double facade. This paper drew the attention to the importance of a correct modeling of the inlet temperature of naturally and mechanically ventilated multiple-skin facades. They took measurements on multiple-skin facades, and proved that the assumption of an inlet temperature equal to the interior or exterior air temperature was usually not valid. A sensitivity analysis was also made to illustrate the significance of the inlet temperature as a boundary condition for numerical multiple-skin facade models.绿色建筑博客Cevc:fVU:f3?
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The inlet modeling is thus of importance to the whole BIPV system energy analysis. However, there is not much worth on detailed fluid mechanics modeling of the inlet. The physical features of the inlet, large turbulence, inflow and backflow uncertainty, wind effects and local climate effects, make the inlet numerical modeling coupled with many other physics. In this thesis, some qualitative analysis of the inlet is presented and comparison with Particle Image Velocitry (PIV) measurement.