Abstract
The Building Energy Management Systems (BEMS) that are installed in commercial and institutional buildings contain a gold mine of data, which could be exploited for the purpose of ongoing commissioning of heating, ventilation and air-conditioning systems. Two applications are presented in this paper. First the paper discusses the feasibility of a virtual air flow meter to estimate the outdoor air flow rate brought in the air-handling units. Second the paper presents the development of benchmarking models of electric demand of chillers in terms of measurements of the following variables: the chilled water flow rate, the supply air flow rate at the air-handling unit, and the return chilled water temperature.
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