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Mixed mode ventilation is an effective way to reduce energy consumption as well as improve thermal comfort. Presented here is an easy to implement method which uses both energy simulation in EnergyPlus and airflow simulation in CFD to estimate cooling energy savings potential from using mixed mode ventilation. The intention is to improve the accuracy of natural ventilation simulation by taking advantage of both algorithms. This paper focuses on one type of natural ventilation used in mixed mode; wind driven natural ventilation.
This paper first describes the workflow of this method. Then a case study is presented suing a 3-floor office building in an urban context. The result is compared with that of airlfow network model in EnergyPlus. The accuracy level and advantages of this method are discussed.