Abstract
This chapter develops a framework for a general integrated local microclimate model, which includes both the pavement structure and the near-surface air, and considers coupled processes of radiation, convection, conduction, shading, and evaporation. A simplified numerical model based on heat transfer is developed to simulate the thermal behavior of pavements, focusing on the pavement surface. The model is used to simulate the temporal and spatial distribution and variation in pavement temperature during the summer in a hot region (Sacramento, California). Preliminary validation of the model is accomplished using field measurements from experimental test sections on both asphalt and concrete pavements (with different materials and structures) and under different weather conditions during summer. The simulated results agree well with the measurements recorded on the test pavements. The model could be used for simulation-based sensitivity analysis of key factors when identifying potential effective strategies for cool pavements, for evaluating the thermal behavior of those cool pavement strategies, and for examining their impacts on the near-surface heat island effect (such as human thermal comfort and air quality issues associated with ground-level ozone) over various time frames and in various climates.
Published Version
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