Measurement of air circulation rate in integral refrigerated shipping containers
Abstract The total rate of air circulation determines, in part, the degree of uniformity in temperature it is possible to obtain in produce transported in a container. An apparatus has been designed, constructed and calibrated to measure the air circulation rate under variable pressure loads in both bottom and top delivery containers to an accuracy of ±2%. It has been found that compared to this apparatus, measurements with vane anenometers overestimated the flow rate by 10 to 55% and a hot-wire anemometer by 5 to 40%.