The phrase "a two stage system" is correct and usable in written English.
It can be used to describe a system that operates in two distinct phases or levels.
Example: "The experiment was designed to evaluate the effectiveness of a two stage system for filtering contaminants from water."
Alternatives: "a dual stage system" or "a two-tier system".
In order to improve the single membrane stage performance, a two stage system has been analysed taking into account both compression and membrane surface requirements.
Process water from sludge dewatering with a mean ammonium nitrogen concentration of 1150 mg L−1 was treated in a two stage system which achieved a nitrogen removal of 75%.
This indicates that the development of a two stage system, combining an artificial co-culture composed of Clostridium spp. with a photosynthetic H2-producing bacterium, could additionally increase the final H2 yield over the theoretical maximum of 4 mol H2/ mol glucose that can be reached by clostridia.
Xypex is at least a two stage system, with the second applications using a thinner, cheaper coating of different composition.
At high sieving coefficient ratios, both yield and purity increase concurrently in a three stage system, whereas at a low ratio of the sieving coefficients, the yield and purity become inversely proportional on the retentate side.
When observing the yield vs. time plot (Fig. 10), it is clear that initially the reaction is not limited as a three stage system.
In a five stage systems, both yield and purity become inversely proportional at high and low sieving coefficient ratios.
A new two stage system has been developed to carry out the catalytic oxidation of hydrogen chloride to produce chlorine for recycle.
It uses a two stage search system which first identifies promising candidate photos and then uploads these to the cloud where a far more powerful search algorithm can do its job without using up smartphone juice.
Three classical relations for estimating inter-stage pressure in a two stage refrigeration system are selected and the performance is evaluated against optimized inter-stage pressure corresponding to the best COP.
