Paper Conference

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


Measured and Simulated Economizer Performance with Demand-controlled Ventilation in an Institutional Building

Annie-Claude Lachapelle, James Andrew Love

Abstract: The ASHRAE 62.1 ventilation standard stipulates minimum outdoor air (OA) requirements for commercial buildings. The standard includes provisions for lower OA supply with demand-controlled ventilation (DCV). Air-side economizers (ASE) increase the OA flow beyond minimum requirements to reduce use of mechanical refrigeration when weather conditions permit. Economizer performance data were collected over a two-year period to evaluate EE4-DOE2 simulation of hybrid DCV-ASE in two systems in a 12,000 m² building in Calgary.. The results show the DCV hours predicted in the model were three times greater than the actual operation. The results were consistent with those from a calibration study carried out with the same EE4DOE2. The analysis showed that the OA damper position relative to the OA temperature can be used to estimate DCV use and is a helpful first indication of the validity of a model both as a reality check and a calibration aid.
Pages: 487 - 500