Chapter 8, Problem 8.113EP

2)Water vapor enters with a turbine, 2kg / s mass flow, 6 MPa pressure, 500 ° C temperature and 40 m / s velocity and exits with 300 kPa pressure, 200 ° C and 100 m / s velocity. 200 W heat transfer is made to the environment from the turbine with a surface temperature of 150 ° C. Note: Take T (K) = 273.15 + ◦C and ambient temperature 25◦C. a) Find the power of the turbine, kW. b) We can find the entropy produced in the turbine, kW / K. c) Find the exergy in kW of the turbine in the compassion section. d) Find the second-law efficiency (exergy efficiency) of the turbine. e) Find the exergy (kW) destroyed in the turbine.

There are required 1902.3 kW of compressor power to handle air adiabatically from 1 atm, 26.7 C to 304.06 kPaa. The initial velocity air velocity is 21 m/s and the final velocity is 85 m/s. a). If the process is isentropic, find the volume of air handled, m3/min measured at inlet conditions. b). If the compression is an irreversible adiabatic to a temperature of 157.2 C, with the capacity found in (a), find the power input, kW

Air is heated at constant pressure from 2 7 degrees C to 57 degrees C at 3 bar in a heater from an infinite heat source at temperature 227 degrees C Find the gain in availability of air and the effectiveness of the heater. Assume To = 280K and Cp =1.0 kj/kgK.

Thermodynamics: Please show step by step solution for the following Practice problem

1.A rotary compressor receives 6m3/min of gas (R=410 J/kg-K, k=1.67) at 105 kPaa, 26.85°C and delivers it at 630 kPaa; changes of potential and kinetic energies are negligible. Find the work in kJ/min if the process is a) isentropic, b) isothermal c)polytropic with n=1.4

A single stage reciprocating air compressor is required to compress air at the rate of 1 kg/s from 0.95 bar and 298 K to 10 bar. Find work done by the compressor, if the compression is a) isentropic and b) polytropic with index as 1.35.

A Factory uses a vapor absorption refrigerator to cool its products, the heat is supplied to generator by steam at 150 C (hfg=2500kJ/kg) and 90% dry. The temperature of the evaporator is to be maintained at -5 C. the refrigeration capacity is 20 Tonnes and actual COP is 70% of the maximum, atmospheric Pressure is 1 bar and ambient temperature 30 C. find the maximum COP. mass of steam per hour

I can't Figure out this? 1.83 Wrong.

.The thermal efficiency of a heat engine is 30%, the heat rejected from the engine is 30kJ, evaluate the heat input to the engine.