Gas accumulation with heat exchange

We will assume that the inflow contains a mixture of gases, and so we will choose to work with kmol units. 

The mass balance equations derived in Section 11.4 will apply as before, namely  

The pressure, needed in equations (11.47) and (11.10) will obey equation (11.13) as before 

It will almost always be possible on a process plant to neglect kinetic and potential enei gies in the enei gy balance, so that we may apply equation (3.43) from Chapter 3, Section 3.5  

The mass in this equation is expressed in kg, the flows in kg/s and the specific internal energy, the specific enthalpy in J/(kg K) and the specific volume in m /kg. We may convert to a kmol basis by dividing mass and mass flows by the average molecular weight, w, and by multiplying by w the specific internal energy, specific enthalpy and specific volume. Note that the energy input and power output (J) are unaffected  

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