Chapter 8, Problem 8.6P

STEP 4 PLS

Water is the working fluid in an ideal Rankine cycle. Steam enters the turbine at 1400 Ib:/in? and 1000°F. The condenser pressure is 2 Ib:/in.? The net power output of the cycle is 250 MW. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser. Step 1 Your answer is correct. Determine the mass flow rate of steam, in Ib/h. 1536000 Ib/h

A simple Rankine cycle uses water as the working fluid. Water enters the pump as a saturated liquid at 10 kPa and exits at a pressure of 5 MPa. Water enters the condenser as a saturated mixture with a quality of 90%. Assume that the cycle is ideal. 1. What is the temperature of the turbine inlet, in °C? Report your result to one decimal place using rounding. 2. How much heat was added in the boiler, in kJ/kg. Round to the nearest whole number. 3. How much heat was removed in the condenser? Round your answer to the nearest whole number. 4. What is the net work produced, in kJ/kg. Round your answer to the nearest whole number.

Steam is the working fluid in an actual Rankine cycle. Steam enters the turbine at 8.0 MPa and 550 deg. C; and saturated liquid exits the condenser at a pressure of 0.008 MPa. The net power output of the cycle is 110 MW. The turbine and the pump each have an isentropic efficiency of 83% Illustrate and label the TS diagram and determine the cycle (a) the cycle thermal efficiency (b) the back work ratio (c)the mass flow rate of the steam, in kg/h, (d) the rate of heat transfer into the working fluid as it passes through the boiler, in MW, (e) the rate of heat transfer, from the condensing steam, as it passes through the condenser, in MW, (f) the mass flow rate of the condenser cooling water, in kg/hr., if cooling water enters the condenser at 15 deg. C and exits at 35 deg. C.

In a steam power plant operating according to the ideal Rankine cycle at 4MPa pressure and 400CIt enters and condenses in the condenser at a pressure of 100kPa. Determine the efficiency of the cycle.What would the efficiency be if the steam entered the turbine at 5MPa pressure and condensed at 90kPa pressure.

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.

Q 1) In a standard Rankine cycle steam enters the turbine at (20 *10^5 pa) and 400°C. The pressure in the condenser is (0.2 *1O^5 pa), and the liquid leaves the condenser saturated. Assuming the turbine and the pump to be adiabatic and reversible: a. Find all the end points of the cycle. b. Draw a T-s diagram for the cycle. e. Calculate the heat and work interactions. d. Calculate the effi ciency of the cycle. (10

1. In an ideal reheat-regenerative cycle, steam enters the turbine at 6 MPaa and 400°C. After expansion to 1.4 MPaa steam is withdrawn and reheated to 300°C. Extractions for regenerative heating occur at 0.15 MPaa and 1.4 MPaa and the condenser pressure is 0.01MPaa. Use mass flowrate of 1 kg/s. a. Sketch the schametic diagram showing the correct state points and its components b. Sketch the T-s diagram showing the states

2. In a reheat cycle steam enters the high pressure turbine at 40 bar and 400°C. It expands isentropic ally to 6 bar and is reheated at constant pressure to 400°C. This steam is expanded isentropic ally in the low pressure turbine to the condenser pressure of 0.1 bar. Calculate the thermal efficiency and steam consumption for 10 MW output.