An air-standard regenerative Brayton cycle operates at steady state and produces 10 MW of power. Given the pressures and temperatures at the various states in Table 1 below, determine: (a) the specific enthalpies (kJ/kg) at all states for which the values are not given, (b) the mass flow rate of air through the cycle in kg/s, (c) the rate of heat transfer (in kW) to the working fluid passing through the combustor, and (d) the thermal efficiency (%) of the cycle. (e) Sketch the cycle on a T-s diagram, showing all states and processes. Assume the compressor and turbine isentropic efficiencies are both 80% and that the regenerator effectiveness is 70%.
2. An air-standard regenerative Brayton cycle operates at steady state and produces 10 MW of power. Given the pressures and temperatures at the various states in Table 1 below, determine: (a) the specific enthalpies (kJ/kg) at all states for which the values are not given, (b) the mass flow rate of air through the cycle in kg/s, (c) the rate of heat transfer (in kW) to the working fluid passing through the combustor, and (d) the thermal efficiency (%) of the cycle. (e) Sketch the cycle on a T-s diagram, showing all states and processes. Assume the compressor and turbine isentropic efficiencies are both 80% and that the regenerator effectiveness is 70%.
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d) the thermal efficiency (%) of the cycle.
e) Sketch the cycle on a T-s diagram, showing all states and processes. Assume the compressor and turbine isentropic efficiencies are both 80% and that the regenerator effectiveness is 70%.
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