Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea


Investigation of Link between Air Exchange Rate and Operational Frequency of Cooling Systems to Create a Design Target for Natural Ventilation during the Early Stages of Building Design

Kyosuke Hiyama, Leon Glicksman

Abstract: The development of information technologies such as BEMS and BIM has allowed access to an enormous amount of data related to building environment performance. It is worth considering the active usage of these data to provide information to architects during the design of naturally ventilated buildings. Architects want to create clear design targets for air exchange rates through the use of natural ventilation. However, the air exchange rate, in and of itself, does not explain the effects of energy savings and environmental improvements due to natural ventilation. Data indicating the extent to which an improvement in the air exchange rate improves the building performance, therefore, can help architects craft a rational design target for natural ventilation. The link between the air exchange rate and the operational frequency of the cooling system is useful for this purpose. In this study, we developed a method for determining links among natural air ventilation databases. A link can be defined by the approximation formula using a Weibull distribution. In addition, it is expected that naturally ventilated buildings can be categorized according to the parameters of the Weibull distribution into four types with different levels of adequate air exchange rate. This categorization helps architects craft a rational design strategy early in the design stage.
Keywords: Data Mining, Natural Ventilation, Air Exchange Rate, Adaptive Comfort Model
Pages: 107 - 114