Air, modeled as an ideal gas, is compressed at steady state from 1 bar, 300 K, to 5 bar, 500 K, with 170 kW of power input. Heat transfer occurs at a rate of 22.67 kW from the air to cooling water circulating in a water jacket enclosing the compressor. Neglecting kinetic and potential energy effects, determine the mass flow rate of the air, in kg/s.

Explanation:

The process made by the compressor at steady-state is modelled after the First Principle of Thermodynamics:

The mass flow rate is:

For ideal gases, specific enthalpies depends on temperature only. Properties at inlet and outlet are, respectively:

The mass flow rate of air is:

answer:

truck

explanation:

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