The adjacent figure provides steady-state operating data for a vapor power plant using water as the working fluid. The mass flow rate of water is 12 kg/s. The turbine and pump operate adiabatically but not reversibly. Determine a) the thermal efficiency. b) the rates of heat transfer QQ and QQ000000, each in kW. State 1 2 3 4 5 6 P 6 MPa 10 kPa 10 kPa 7.5 MPa 7 MPa 6 MPa T(C) 500 ... Sat. *** 40 550 h (kJ/kg) 3422.2 1633.3 191.83 1994 167.57 3545.3

The adjacent figure provides steady-state operating data for a vapor power plant using water as the working fluid. The mass flow rate of water is 12 kg/s. The turbine and pump operate adiabatically but not reversibly. Determine a) the thermal efficiency. b) the rates of heat transfer QQ and QQ000000, each in kW. State 1 2 3 4 5 6 P 6 MPa 10 kPa 10 kPa 7.5 MPa 7 MPa 6 MPa T(C) 500 ... Sat. *** 40 550 h (kJ/kg) 3422.2 1633.3 191.83 1994 167.57 3545.3

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

The turbine section of a Brayton cycle gas turbine receives the hot compressed air at 150 psia and 2100 °R, expand it to 15 psia and develops a gross output of 15,000 hp. Air enters the compressor at 500 R. Determine a) mass of air required, lb/s, b) compressor power required, c) net power output, and d) cycle efficiency. Show pV and Ts diagram. (THERMODYNAMICS 2)
3. A simple steam power plant illustrated below uses 20 kg/s of steam. Find: a) the boiler heat transfer rate; b) the turbine power output; c) the condenser duty; d) the pump power required. What is the ratio of net power out to heat in (the thermal efficiency)? The turbine and the pump are adiabatic 2 Boiler Pump 2 3 |3|4 Stream T(°C) P(MPa) 40 40 Turbine 600 x = 1 Condenser 0.01 10 10 0.01 A
The displacement volume of an internal combustion engine is 3 liters. The processes within each cylinder of the engine are modeled as an air-standard Diesel cycle with a cutoff ratio of 2.5. The state of the air at the beginning of compression is fixed by p1 = 95 kPa, T1 = 228 degree C, and V1 = 3.17 liters. Determine:a.) the net work per cycle, in kJb.) the power developed by the engine, in kWc.)the thermal efficiency, if the cycle is executed 1000 times per min
Write legibly, provide manual step by step solution, and diagram for below given problem. A superheat steam Rankine cycle has turbine inlet conditions of 17.5 Mpa and 530 C expands in a turbine to 0.007Mpa. The turbine and pumps polytropic efficiencies are 0.9 and 0.7 respectively, pressure losses between pump and turbine are 1.5MPa. What should be the pump work in KJ/kg? A. 17.3 C. 37.3 B. 27.3 D. 43.4
Ts diagrams for two reversible thermodynamic power cycles are shown in the following fig- ure. Both cycles operate between a high temperature reservoir at 500 K and a low temperature reservoir at 300 K. The process on the left is the Carnot cycle described in Section 2.9. The process on the right is a Brayton cycle, which is similar to a Carnot cycle, except that the two steps (state 1 to state 2) and (state 3 to state 4) are at constant pressure. Which cycle, if either, has a greater efficiency? Explain.
Q1. Heat engines convert internal energy to mechanical energy. Describe the operation of this reversible engine on a PV diagram and show how to determine the efficiency of the cycle.
Q.1 Calculate Efficiency of the system, the net Work transfer & Heat rejected to sink for a Carnot cycle operates between sources and sink temperatures of 285 °C and – 11 °C. If the system receives 100 kJ from the source. A 53.04%; 53.04 kJ; 46.95 kJ В 55.52%; 55.52 kJ; 47.68 kJ C 45.88%; 45.88 kJ; 44.44 kJ D 63.05%; 63.05 kJ; 50.35 kJ
Q1: A heat engine used a steam as working fluid has 3 kg/s and initial the steam undergoes to expansion process is 8 bar, dryness fraction (32) percent, and the expansion follows the law (PVL-C), down to a pressure of 0.3 bar. Calculate the change of entropy of steam during the process. . ,.¢
Q.2 A Carnot engine operates with ideal gas, using the Carnot cycle shown in the following Figure. Using the first law of thermodynamics and assume no change of internal energy, determine the thermal efficiency, the specific heat impute (q), and the work output (w) for each cycle of operation. (K=1.4 & R=0.287 KJ/Kg. K) T = 220 C 77 kPa T = 20 C 12 m'/kg
4 STEAM P₁ = 40 BAR (AV), P₂ 3 P4 = Ask: = 70m3 min 20 Bar T₁ = 500°C T2= P3= 20 Bar SATURATED VAPOR 400°C T3 = 500°C KINETIC AND POTENTIAL ENERGY = STEADY STATE = 0,6 Bar TURBINE 1 TOTAL POWER iN kW RATE OF HEAT TRANSFER Ø GENERATED By а (data) TURBINE 2 REHEATER dQ/dt BOTH IN ки TURBINES IN THE RE HEATER
010. Sketch a P-V diagram Carnot cycle for a heat pump. What does the area enclosed by the graph represent?
Steam power plant shown in figure isoperating at steady state with water as the workingfluid. The mass flow rate of the water circulatingthrough the components is 50 kg/s. Determine:a) thermal efficiency of the actual cycleb) Carnot cycle efficiency (justify anyassumptions you make in calculating ηCarnot)c) isentropic turbine efficiencyd) isentropic pump efficiencye) mass flow rate of the cooling water, in kg/s.f) rates of entropy production, each in kW/K, forthe turbine and steam generator