Abstract
So far we have considered only closed systems, which do not exchange mass. We shall now extend the discussion to systems which exchange mass with their surroundings. Figure 9.1 shows a generic open system with two inflows and two outflows. In the following, and in the figure, the amount of mass exchanged per unit time, the mass transfer rate or mass flow, is denoted by ṁ. The system also exchanges propeller and piston work, Ẇ = Ẇ propeller + Ẇ piston , and heat, Q̇ = Q̇ 1+ Q̇ 2, with its surroundings, just as a closed system does. Below, we shall add the appropriate terms to the thermodynamic laws to account for mass transport over the system boundary.
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© 2014 Springer-Verlag Berlin Heidelberg
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Struchtrup, H. (2014). Open Systems. In: Thermodynamics and Energy Conversion. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-43715-5_9
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DOI: https://doi.org/10.1007/978-3-662-43715-5_9
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-43714-8
Online ISBN: 978-3-662-43715-5
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