EVALUATION OF A HIGH RESOLUTION ATMOSPHERIC URBAN-SCALE (CANOPY) MODEL FOR ENERGY APPLICATIONS IN STRUCTURED AREAS

摘要

A reliable estimation of the energy consumption of buildings including the short term prediction (1-4 days) of air conditioning loads, requires the use of trustworthy predictions of meteorological parameters such as temperature, solar radiation and vector rate at a very high spatial resolution i.e. hundreds of meters over the built-up areas. The use of atmospheric mesoscale models (computational cells in the order of kilometres) provides very sparse information since the extent of urban areas is practically covered by less than ten computational cells in most applications. On the other hand, the implementation of these standards in high resolution requires an understanding of the physical configurations of the pattern when the distance between the computing nodes approaches the main scale of the phenomena one wishes to forecast.The current work is part of a project the aim of which is the development and evaluation of a high resolution atmospheric urban-scale model to simulate the aerodynamic and thermal effects of urban surface characteristics on the atmosphere and provide detailed meteorological parameters required for energy studies in structured areas. The model is based on a microscale Computational Fluid Dynamics (CFD) type numerical model. It will be applied to a large area of Kozani city instead of the typical application in isolated streets or buildings, which is frequently met in the literature. This model will be coupled with a mesoscale atmospheric model which will provide the boundary conditions to the CFD model. For this purpose the Atmospheric Pollution Model (TAPM) will be used within the research effort. In the present paper, the evaluation of TAPM at very high spatial resolution is presented. Control runs of the model developed were carried out over the wider area of Kozani, and the results were evaluated according to observed measurements of surface meteorological parameters.