Paper Conference

Proceedings of eSim 2014: 8th Conference of IBPSA-Canada


Comparing Design and As-Built Simulations with Actual Measurements for a Large Multi-Use University Building

Belgin Terim Cavka, M. Mahdi Salehi, Andrea Frisque, Kendal Bushe

Abstract: The Centre for Interactive Research on Sustainability (CIRS) at the University of British Columbia was designed with the intention of being a “Living Lab”. The building is equipped with an Energy Monitoring System (EMS) and a Building Automation System (BAS). Data collection from over 3000 monitoring points (lighting, CO2, VOC, temperature, energy meters, many details of HVAC operations, window status sensors, solar PVs and transmitters, etc.) has been available since the building was fully occupied in 2012. The considerable volume of available data can be (and is being) directly used to optimize performance of the building's systems, and it is also used for validation and improvement of building simulations. In this paper, we will describe some of the challenges we have had in processing the sheer volume of data, as well as challenges we have had with un-calibrated – or even incorrectly installed – sensors, some of which have come to light in part through our combined use of simulation and measurement in this project. After verification of the measured data, it is compared to data from whole building energy simulations from the design stage. A “performance gap” between simulation predictions and measured performance, which is frequently described in literature recently, is found the case of in CIRS as well. The reasons for this “performance gap” are investigated in this paper in some details.
Pages: 192 - 204