Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Questions Work at a rate of 25 kW is done by a paddle wheel on a slurry contained within a closed, rigid tank. Heat transfer from the tank occurs at a temperature of 250°C to the surroundings that, away from the immediate vicinity of the tank, are at 27°C. Determine the rate of entropy production, in kW/K, (a) for the tank and its contents as the system, and (b) for an enlarged system including the tank and enough of the nearby surroundings for the heat transfer to occur at 27°C. Assume steady state operation in both cases. Air enters an insulated turbine operating at steady state at 6.5 bar, 687°C and exits at 1 bar, 327°C. Neglecting kinetic and potential energy changes and assuming the ideal gas model, determine (a) the work developed, in kJ per kg of air flowing through the turbine, (b) the entropy production per kg of air, in kJ/kg K, and (c) whether the expansion is internally reversible, irreversible, or impossible. A power system operating at steady state consists of an air compressor having an isentropic compressor efficiency of 80%, a heat exchanger, and a turbine having an isentropic turbine efficiency of 90%. Air enters the compressor at 1 bar, 300K with a mass flow rate of 5.8 kg/s and exits at a pressure of 10 bar. Air enters the turbine at 10 bar, 1400 K and exits at a pressure of 1 bar. Air can be modeled as an ideal gas. Stray heat transfer and kinetic and potential energy effects are negligible. Determine, in kW, (a) the power required by the compressor, (b) the power developed by the turbine, and (c) the net power output of the overall power system.
pin a which is attached to link ab is constrained to move in the circular slot cd. knowing that at t0 the pin starts
ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 248c and
a periodic torque with a maximum value of 1.0 n-m at a frequency of 5.0 rads is applied to a flywheel suspended from a
At the end of the isothermalexpansion, the pressure is 600 kPa and the volume is 0.4 m3. Assuming the ideal gas model for air, determine the thermal efficiency.
what is the deflection wt of a simply supported beam of varying load pt w.r.t time applied at center. consider maxwell
air is adiabatically compressed in a non flow process from a pressure of 14.7 psia and a temp of 70 deg to 200 psia and
a bottle containing 10 kg of water at an initial temperature of 35 degrees celsius is stored in a refrigerator whose
Your rich godfather has offered you a choice of one of the three following alternatives: $10,000 now; $2,000 a year for eight yeaers; or $24,000 at the end of eight years
a heat pump with a coefficient of performance of 3.5 provides energy at an average rate of 70000 kjh to maintain a
a combined gas-vapor power plant operates as shown in fig.9.94. pressure and temperature data are given at principal
consider a single crystal cylindrical specimen of iron oriented such that a tensile load is applied along a 010
refrigerant-134a is gaining heat at a rate of 4 kws as it passes trough the diffuser. it enters the diffuser as
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd