Particle size, specific gravity, number of units, depth, manning coefficient, volume of grit, detention time and air supply per unit length of tank in grit removal are 0.02 cm, 2.65, 2, 1.2 m, 0.035, 3 × 10−5 m3 grit/m3, 2.5 min and 0.28 N m3/min/m, respectively.
To construct the Oxylet neonatal prototype, the sampling pump of the Oxylet LE405 gas analyzer was replaced with a more sensitive and stable model and the flow regulators and flow meters of the Oxylet LE 400 air supply and switching unit were replaced with more sensitive components.
Air supply in each unit was assured by separated ventilation ducts.
An exhaust grille, a rectangular opening 0.3 m by 0.6 m, located in the false ceiling in the corridor outside each cubicle and outside the nurses' station, recirculates 70% of the air supply back into the fan-coil unit.
The ventilation system treated here used both external air supply (Cases 1 3) and fresh air which came across a heat recovery unit (Cases 2 4), having constant flow rate.
First, to ensure that the feed burner air supply is not oxygen deficient, we consider the addition of a small air separation membrane unit on this feed air supply.
The air supply to each building comprised 80% recycled air and 20% fresh air, processed in air handling units (AHU) to remove airborne dust and lower the temperature.
The existing gas clean-up units operate at high temperatures and pressures and often require on-board oxygen or air supply for CO oxidation.
We attempted to increase the outdoor air supply only during periods in which the economizer function of the heating, ventilation and air-conditioning (HVAC) units would generally decrease the amount of outdoor air, such as during the heating and cooling seasons of summer and winter.
