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Abstract: Carbon Crystal Panel (CCP) system, a new type of electric-heating system material based on the mechanism that nano carbon crystal sends out quantity of heat when it is electrified, enjoys lots of advantages, such as good controllability, cleanness during using, and high thermal response-speed. Compared with experimental data, the validity of mathematical physical model of the indoor CCP system is verified. According to the occupied feature of office rooms in southern cities of China, partial-heating program of CCP system is put forward and its indoor temperature field is simulated. The result shows, under the partial-heating condition, the temperature in localized working region comes up to the indoor designed temperature; the partial-heating program achieves the effect of energy-conservation. This paper provides technical support for the application of CCP system in public buildings. [Copyright &y& Elsevier]

Abstract: Techniques for modelling urban microclimates and urban block surfaces temperatures are desired by urban planners and architects for strategic urban designs at the early design stages. This paper introduces a simplified mathematical model for urban simulations (UMsim) including urban surfaces temperatures and microclimates. The nodal network model has been developed by integrating coupled thermal and airflow model. Direct solar radiation, diffuse radiation, reflected radiation, long-wave radiation, heat convection in air and heat transfer in the exterior walls and ground within the complex have been taken into account. The relevant equations have been solved using the finite difference method under the Matlab platform. Comparisons have been conducted between the data produced from the simulation and that from an urban experimental study carried out in a real architectural complex on the campus of Chongqing University, China in July 2005 and January 2006. The results show a satisfactory agreement between the two sets of data. The UMsim can be used to simulate the microclimates, in particular the surface temperatures of urban blocks, therefore it can be used to assess the impact of urban surfaces properties on urban microclimates. The UMsim will be able to produce robust data and images of urban environments for sustainable urban design. [ABSTRACT FROM AUTHOR]