Chapter 7, Problem 7.38P

A thermal power plant operates such that the steam exits boiler at 4 MPa, 400C and the condenser pressure is 10 kPa. The efficiency of the turbine and pump is 85% and 90% respectively. a. Draw the plant PFD (Process Flow Disgram) and the process Ts diagram and calculate quality of steam discharge from the turbine as well as the plant's thermal efficiency. b. If the plant produces 300MW of net power, - What is the steam flowrates in kg/hr? - If the plant uses natural gas as a fuel, determine the flowrate of NG in MMSCMD. State the reference for your data. - If the plant uses coal as a fuel, determine the amount of coal required (tonne per annum). State the reference for your data and all your assumptions. c. How much power required by the pump in kW? Is this the real power required by the pump? Explain d. Find the heat rejected in the condenser and evaluate the thermal efficiency using this value. e. The heat rejected to surrounding is through a cooling water system from a nearby ocean.…

Draw the schematic diagram for regenerative vapour power cycle with 2 steam blades. Represent the complete process in T-S diagram

why does q surrounding not need to be delivered reversibly?

A turbine is supplied with steam at 25 BAR, 42C and exhaust into a condenser at 55 KPa. Find the thermal efficiency of the cycle. Draw the schematic and T-S diagrams with corresponding labels. (Clear handwritten and step by step solution)

The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line.Steam is supplied to the throttle valve at 1,700 kPa and 225°C. During a test run, the pressure atthe turbine inlet is 1000 kPa, the exhaust steam at 10 kPa has a quality of 0.95, the steam flowrate is 0.5 kg/s, and the power output of the turbine is 180kW. 1. What are the heat losses from the turbine? 2. What would be the power output if the steam supplied to the throttle valve were expandedisentropically to the final pressure?

Define the Reversible Adiabatic Compression

2.) An actual Rankine Engine is used to power a generator. The steam enters its turbine at 4 MPa and 300C then expands in an irreversible adiabatic process where it becomes saturated vapor. It enters the condenser with a pressure of 5 kPa. Find Ec, W(W₁, W₁, Wk) the remaining engine efficiencies(n,, na, nx), thermal efficiencies (e₁, 3, ek), SR(SR₁, SR₂, SR), HR(HR, HR, HR) obtained if the turbogenerator has 85% mechanical efficiency and 90% generator efficiency. 2822.88 kg W 27 e SR HR I 399.2 39.08% 14.14% 25456.73 B 339.32 33.22% 12.02% 29949.35 305.39 29.89% 10.82% 33276.96 k kg kj kg kg kWh kg kWh kg kWh 9.02- 10.61 11.79 kWh kj kWh

1. In a Regenerative cycle, the steam is extracted from the turbine at 2 Mpa and 250C for feedwater heating and it is mixed with condenser exit at 30 kpa after pumping. Find the fraction of vapor extracted from the turbine.

QUESTION 3 a boiler plant generates 5000kg/hr of steam at 3000kPa and enthalpy of 2995k/kg. The water entering the plant has a temperature of 12°C. At exit from the economizer the temperature of the water is 85°C. The enthalpy at exit from the evaporator is 2533kJ/kg and the fuel used has a calorific value of 32MJ/kg. Neglect the combustion losses and take the thermal efficiency of the plant to be 80%. Determine: 1.1the final temperature of the steam;the heat absorbed in each component of the plant in kJ/kg fuel. 1.2 The heat absorbed in each component  of the plant in KJ/kg