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This causes material and thermodynamic problems because, with the rise in the mean difference in temperature of the heat-exchanging agents, the exergy losses rise too which leads to a reduction in the process effectiveness and to an increase in the heating steam consumption. In: IFAC control of power plants and power systems. Figure 6. Riso R EN , Denmark; In a four cylinder four stroke diesel engine, the crankshaft angular velocity fluctuation during the steady state operation is the result of the cylinder pressure variation, the engine friction and the dynamics of the crankshaft.

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