Paper Conference

Proceedings of eSim 2016: 9th Conference of IBPSA-Canada


A new algorithm for sensors verification and correction in air handling units

Nunzio Cotrufo, Radu Zmeureanu

Abstract: The use of trend data from Building Automation Systems (BAS) is a cost-effective strategy for ongoing commissioning in HVAC systems. Quality of measurements, thus, is essential for the effectiveness of commissioning process. This paper presents an approach to verify, and correct if necessary, the outdoor air temperature and relative humidity measurements in an AHU economizer. The proposed iterative algorithm solves an optimization problem that maximizes the goodness of fit, in terms of coefficient of variation, CVRMSE, between a directly measured variable, and its value derived from an air energy balance. This approach has been verified with data from an institutional building in Montréal, proving its capability to highlight errors in the measurements of outdoor air relative humidity and temperature. Corrected values have been finally validated through comparison against spot measurements with calibrated sensors.
Pages: 56 - 64