Читать книгу Fundamentals of Heat Engines - Jamil Ghojel - Страница 32

If there is energy addition, storage, or loss between sections 1 and 2 in Figure 1.6, the energy equation can be written as

(1.32)

where ∑ f_l is the algebraic sum of all losses and gains between points 1 and 2. These could include mechanical energy gained from a booster pump, mechanical energy lost by running a fluid motor or turbine, and energy lost due to friction in the control volume.