Thermodynamics

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Ideal Steam Turbine

An ideal steam turbine uses 6000 kg/h [1] of steam. The steam is superheated to 720°C [2] and 4000 kPa [3] when supplied to the turbine. The exhaust temperature is 80°C [4], and the fluid leaving the condenser is assumed to be a saturated liquid. Determine the power generated by the cycle, the rate of heat rejected, the amount of coal consumed if the boiler unit is assumed to be 100% effective while the LHV of coal is 30,000 kJ/kg, and the steam rate.

[1] Instead of 5000 kg/h use 6000 kg/h

[2] Instead of 560°C use 720°C

[3] Instead of 2000 kPa use 4000 kPa

[4] Instead of 60°C use 80°C

Quiz 2.pdf

Thermodynamics-with-MatLab-Air-Conditioner/MECH_2430_Quiz_3.m at main · mcalixto223/Thermodynamics-with-MatLab-Air-ConditionerContribute to mcalixto223/Thermodynamics-with-MatLab-Air-Conditioner development by creating an account on GitHub.

Air Conditioner

An air conditioner operates in 40°C weather to keep a room at 20°C by withdrawing 12,000 kJ/h of heat. Compare the answers you obtained by using the appendix table with those you obtained by using EES.

(a) Assuming that the evaporator and condenser have perfect heat conduction, that the cycle is an ideal dry compression cycle, and that the working medium is

Refridgerant-12[1], determine the rate of heat rejected to the atmosphere, the power required, the COP, and the COR.

(b) If the air conditioner is redesigned so that it now uses R-123[2], determine the rate of heat rejected, the power required, the COP, and the COR.

[1] Use R-12 instead of R-22

[2] Use R-123 instead of R-134a

Quiz 3.pdf