An experimental study of temperatures in cloud from release of flashing liquid CO2 in 3m long channel.

Abstract

Flashing of the liquid CO2 is an accidental hazards that may occurs in many industrial sector such as, process industries, carbon capture and storage projects, crude oil extraction process etc. Sometimes the accidental release of liquid CO2 that causes the health hazards which may costs loss of lives and properties. In order to alleviate the aforementioned probable hazards, the experiment will be highly beneficial. This research activity is conducted through the temperature measurement in the cloud of flashing liquid CO2 confirming the formation of dry ice and measuring frontal velocity of the cloud as well as its height formed from the vapour CO2 dispersion. The liquid CO2 was released in the 3m long channel from the cylinder through two nozzles of diameter 0.5mm and 1.0mm. This leads the formation of dry ice measuring -73oC and -71oC from the nozzle sized 0.5mm and 1.0mm respectively. 0.5mm nozzle and 1.0mm nozzle having mass flow rate of liquid CO2 as 0.0089 kg/s and 0.029 kg/s, overall frontal velocity of 0.52 m/s and 1.51 m/s thus formed cloud height measuring 0.05m and 0.1m respectively. Frontal velocity of the cloud was found to be highest at distance of 0.5m from nozzle with 1.49 m/s and 5.5 m/s for both nozzles 0.5mm and 1.0mm diameter respectively. Upon the increasing distance from the nozzle, the temperature of the formed cloud was seen to be in increasing order.