Discussion on methodology of applying building thermal simulation in in conceptual design

In order to realize “design by simulation” in building design, this paper discusses the methodology of applying building thermal simulation in the building conceptual design stage. The conceptual design stage is divided into four sub-stages and the framework of design by simulation in the conceptual design stage has been built. Moreover, energy saving potential assessment by simulation in the preliminary conceptual design stage is discussed in detail, including input/output information, calculation method and procedure, requirements and information from architects for architectural design, etc.. Natural ventilation design is used as the first trial in this study, its difference between in the detail conceptual design and in the preliminary conceptual design is discussed and the new simulation methodology is described. Such a research is aimed at avoiding wrong decision made in the conceptual design stage, and providing a better base for energy efficient design in the next stage by means of building thermal simulation tool.