6 OPC UA for Compressed Air Systems Information Model ToC Previous Next

6.3 Airnet Examples ToC Previous Next

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

readme_files/image013.png Figure 8 – Simple Airnet

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

readme_files/image014.png Figure 9 – Two Simple Airnets

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

readme_files/image015.png Figure 10 – Connected Airnets

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

readme_files/image016.png Figure 11 – Overlapping Airnets

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