Figure 8shows a simple model of an Airnet. The inlet of the Airnetis the sum of the inlets of compressors C1 and C2. The outlet of the Airnet is the Customer Distribution Point. All CASPartsthat are inside the red box are connected to the red Airnetand treated as such. The Main Control Systemis not a part of the Airnet.

image014.png

Figure 8– Simple Airnet

Figure 9shows a Compressed Air Systemwith two separate Airnets. The inlet of the red (upper) Airnetis the sum of the inlets of compressors C1 and C2. The outlet of the red Airnet is the upperCustomer Distribution Point. All CASPartsthat are inside the red box are connected to the red Airnetand treated as such. The inlet of the blue (lower) Airnetis the sum of the inlets of compressors C3 and C4. The outlet of the blue Airnet is the lower Customer Distribution Point. All CASPartsthat are inside the blue box are connected to the blue Airnetand treated as such. The Main Control Systemis not a part of any Airnet.

image015.png

Figure 9– Two Simple Airnets

Figure 10shows an arbitrary example on how two Airnetsof the same Compressed Air System can be connected. The inlet of the red (bigger) Airnetis the sum of compressors C1, C2, C3, and C4. The two outlets of the red Airnetare the inlet of the dryer D3 and the lower Customer Distribution Point. All CASPartsthat are inside the red box are connected to the red Airnetand treated as such. The inlet of the blue (smaller) Airnetis the inlet of the dryer D3. The outlet of the blue Airnet is the upper Customer Distribution Point. All CASPartsthat are inside the blue box are connected to the blue Airnetand treated as such. The Main Control Systemis not a part of any Airnet.

image016.png

Figure 10– Connected Airnets

Figure 11shows two overlapping Airnetsof the same Compressed Air System. The inlet of the red (upper) Airnetis the sum of compressors C1 and C2. The two outlets of the red Airnetare the upper and the lower Customer Distribution Points. All CASPartsthat are inside the red box are connected to the red Airnetand treated as such. The inlet of the blue (lower) Airnetis the sum of compressors C3 and C4. The outlet of the blue Airnet is the lower Customer Distribution Point. All CASPartsthat are inside the blue box are connected to the blue Airnetand treated as such. The sensor M2 is connected to both Airnets. If Valve CV3 is open, the red Airnet is the active Airnet for M2. If Valve CV3 is closed, the blue Airnetis the active Airnet for M2. Valve CV3 is connected to the red Airnetand not to the blue Airnet, because its purpose is to divert the air from the Airnetwith the higher pressure (red, 11 bar) to the lower distribution point and not from the Airnetwith the lower pressure (blue, 8 bar) to the upper distribution point. The Main Control Systemis not a part of any Airnet.

image017.png

Figure 11– Overlapping Airnets