The ideal is 100%, meaning no change in entropy, but a typical value is 0.8–0.9. We have already seen that the change in specific enthalpy of a perfect gas is δh=cp.δT and that, from the SFEE, the power developed in, say, a turbine is P=m˙(h1−h2) • Therefore the ...
In this case, the flash vessel is often called an ‘open intercooler’. Compression performance is also dependent on the refrigerant. Higher suction temperatures tend to decrease the refrigerant density and decrease the volumetric heating capacity meaning the same compressor has a lower mass flow ...
It is impossible for the pressure ratio in the exit section to fall below that given by Eq. (4.45), and solutions of Eq. (4.44) have no physical meaning for values of ppo<(2γ+1)γ/(γ−1) Equally, it is necessary for the convergent-divergent tube of Fig. 4.1 to be ...
where Δ12 is the interaction term and other symbols have their usual meaning. The equation proposed by Tamura and Kurata [35] (17)η=x1Φ1η1+x2Φ2η2+2x1x2Φ1Φ21/2T12 where Φ1 and Φ2 are the volume fractions of components 1 and 2, respectively and T12 is the Tamura and ...
Next, we solve two example problems using the existing conventional approach as found in most thermodynamics books and the new approach proposed in this paper based on the new entropy term s+. The first example deals with the calculation of the entropy change of air and the second example deal...
Next, we solve two example problems using the existing conventional approach as found in most thermodynamics books and the new approach proposed in this paper based on the new entropy term s+. The first example deals with the calculation of the entropy change of air and the second example deal...