[a] Computer, software controller and air-flow controller, which determines the smoking parameters and key machine settings.
This automated system was mainly composed of a Li-Cor CO2 analyzer Li-70000), air-flowlow controller, soda-lime equipment to manipulate the initial CO2 concentration, and a data collector.
The air flow rate is controlled by an air Viton O-ring mass flow controller, (model M3030V; manufactured by Line Tech 400, Daejeon, Korea).
The desired concentration of VOCs in the indoor environment was achieved by adjusting the flow rate of the delivering air using a mass flow controller.
Gas flow rate was 200 ml min-1 of house air and controlled using a mass flow controller (Cole-Parmer Instrument Company, IL, USA).
The air flow to the reactors was controlled by mass flow controllers at a rate of 0.4 volume of air per volume of medium per minute, using a stainless diffuser.
Linearity of the CO2 detector was assessed by diluting the gas standard (1010 ppm CO2, balance nitrogen) with medical grade compressed air using mass flow controllers to produce final CO2 concentrations of 50.5, 101, 505 and 1010 ppm.
Compressed air was pumped through a mass flow controller (Bronkhorst Hi-Tec, The Netherlands) to adjust the gas flow rate and empty bed residence time (EBRT).
The acquired information is sent to a controller to adjust the air flow rate of the fluidised bed dryer.
Odor was injected at 50 ml/min (Sensirion mass flow controller) into a 200 ml/min constant air stream (Sable Systems intelligent mass flow control unit) and removed via vacuum.
The results demonstrated that the controller has generated substrate and air flow rates as an output acceptable in large scale.
