Full Description

Laboratory measurements have been made to determinethe accuracy of several handheld instruments when used tomeasure the exhaust airflow rates during commercial kitchenairflow balancing. The instruments included 4 in. (0.1 m) and2.75 in. (0.07 m) rotating vane anemometers, a hot filmanemometer, a velocity grid, and flow hoods with 2 Ã 2 ft(0.61 Ã 0.61 m) and 2 Ã 4 ft (0.61 Ã 1.22 m) hoods. Grease filterconfigurations included conventional baffle filters, cyclonefilters, and slot filters mounted in an 8 ft (2.4 m) canopy exhausthood. Exhaust airflow rate measurements were made atapproximately 2000, 3000, and 4000 scfm (0.94, 1.4, and1.9 m/s) for each instrument and each filter type. Measurementswere made with a gas fryer, half-size electric oven, anda gas underfired broiler idling (hot tests) and turned off (coldtests) to determine the influence of hot appliances. Flow ratesdetermined using calibrated flow nozzles in the supply airsystem agreed to within a few percentage points of thosemeasured using the flow hoods. The other instruments generallydid not provide accurate results unless an appropriatecorrection factor, or K-factor, was used.

Citation: ASHRAE Transactions, Volume 117, Part 1, Las Vegas, NV

Product Details

Published: 2011 Number of Pages: 12File Size: 1 file , 3.3 MB Product Code(s): D-LV-11-004