Chapter 8, Problem 8.41P

Superheated steam at 20 MPa, 560 deg C enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.5 bar, and liquid leaves the condenser at 0.4 bar at 75 deg C. The pressure is increased to 20.1 MPa across the pump. The turbine and pump have isentropic efficiencies of 81% and 85%, respectively. Cooling water enters the condenser at 20 deg C with a mass flow rate of 70.7 kg/s and exits the condenser at 38 deg C. For the cycle, determine (a) the mass flow rate of steam, in kg/s. (b) the thermal efficiency.

in an ideal reheat cycle, the steam enters the turbine at 30 bar and 500°C after expansion to 5 bar, the steam is reheated to 500°Cand then expanded to the condenser pressure of 0.1 bar. Determine the cycle thermal efficiency, mass flow rate of steam. Take power output as 100 MW.

Question # 1 The networkoutput and the thermal efficiency for the Carnot and the simple ideal Rankine cycles with steam as the working fluid are to be calculated and compared. Steam enters the turbine in both cases at 5 MPa as a saturated vapor, and the condenser pressure is 50 kPa. In the Rankine cycle, the condenser exit state is saturated liquid and in the Carnot cycle, the boiler inlet state is saturated liquid. Draw the T-s diagrams for both cycles.

4. Superheated steam at 18 MPa, 560°C, enters the turbine of a vapor power plant. The pressure at the exit of the turbine is 0.06 bar, and saturated liquid leaves the condenser at 0.06 bar. The pressure is then increased by a pump to the boiler pressure at 18 MPa. The turbine and pump efficiencies are 82 and 77%, respectively. For the cycle, determine (a) The net-work per unit mass of steam flow, in kJ/kg (b) Heat transfer to steam passing through the boiler, in kJ/kg (c) The thermal efficiency of the cycle (d) Heat transfer to cooling water passing through the condenser, in kJ/kg. (e) Draw complete T-s diagram

Thermodynamics Instructions: Draw the T-s and Schematic diagram for this problem

A binary-vapor cycle operates on mercury and steam. Saturated mercury vapor at 6 bar is supplied to the mercury turbine, from which it exhaust at 0.08 bar. The mercury condenser generates saturated steam at 20 bar which is expanded in a steam turbine to 0.04 bar. (i) Find the overall efficiency of the cycle. (ii) If 50000 kg/h of steam flows through the steam turbine, what is the flow through the mercury turbine? (iii) Assuming that all processes are reversible, what is the useful work done in the binary vapor cycle for the specified steam flow? (iv) If the steam leaving the mercury condenser is superheated to a temperature of 300°C in a superheater located in the mercury boiler, and if the internal efficiencies of the mercury and steam turbines are 0.85 and 0.87 respectively, calculate the overall efficiency of the cycle. The properties of mercury are given below. P bar t°C hf (kJ/kg) hg (kl/kg) Sf (kJ/kg K) Sg (kJ/kg vf (m3/kg) K) vg (m3/kg) 6 480 68.75 359.65 0.1384 0.5327 79.9x10-6…

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On my online homework, it says the answer for part b, 993.2 kW and part c, 360.06 are incorrect. I also need help with part d.   The figure below provides steady-state operating data for a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 1.5 MPa, 280°C, enters a two-stage turbine with a mass flow rate of m1 = 2 kg/s. A fraction of the total flow, y = 0.15, is extracted between the two stages at 0.2 MPa to provide for building heating, and the remainder expands through the second stage to the condenser pressure of 0.1 bar. Condensate returns from the campus buildings at 0.1 MPa, 60°C and passes through a trap into the condenser, where it is reunited with the main feedwater flow. Saturated liquid leaves the condenser at 0.1 bar.