State Changes of Humid Air

Now we will consider a balance borderline of the system presented in Fig. 4.14. The system can be any part of the air surrounding the process device. If an air-handling application is considered, the balance can be calculated over the. inner air of a room, an office, or an industrial hall, for example. 

T he energy balance of the system, consisting of the area inside the balance borderline, is in a stationary situation  

In many cases the incoming and outgoing air flows can consist of various air flows in different states (temperature, humidity), which must be treated separately. This means that the air enthalpy flow must be divided into corresponding parts. 

Mixing of two air flows. As illustrated in Fig 4.15i3, the energy balance is 

2 STATE VALUES OF HUMID AIR MOLLIER DIAGRAMS AND THEIR APPLICATIONS 

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