Instrumentation Design for HRR Measurements in a Large-Scale Fire Facility |
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Authors: | Yoon J Ko Richard Michels George V Hadjisophocleous |
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Affiliation: | (1) Department of Civil Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, ON, K1S 5B6, Canada |
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Abstract: | Carleton University’s experimental atrium and tunnel facilities share a fan chamber and three large exhaust fans. Using oxygen
consumption calorimetry, the Heat Release Rates (HRR) of fires in either of these facilities can be calculated. This paper
focuses on the design of the instrumentation in the fan chamber, which was carried out using the Fire Dynamics Simulator (FDS)
and manual velocity measurements. Due to a high amount of mixing and turbulence and a long travel distance, the temperature
and gas concentration profiles are relatively uniform. However, for the same reason, the velocity profile had to be looked
at very closely to find an optimum combination of bi-directional probes. The analysis indicated that acceptable HRR measurements
can be obtained using an array of six thermocouples, four bi-directional velocity probes and a gas sampling grid. Results
from the preliminary tests are presented. The system shows a reasonable estimate of the HRR as compared to the propane calibration
burner. |
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Keywords: | |
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