Chapter 5, Problem 5.11P

It is proposed to design and develop a Rankine cycle Steam Power Plant in which steam at 80 barand 500 oCis supplied to the turbine which exhausts at a pressure of 0.11 bar into a condenser. Condensate from the condenser is returned to Steam Generator (Boiler) by a Feedwater Pump. The processes in the turbine and pump can be assumed to be reversible adiabatic. In addition, pressure and temperature drops can be neglected throughout the cycle. Sketch the T-s diagram for this cycle and calculate the following performance parameters:i) Cycle Thermal Efficiency ii) Work Ratioiii) Specific Steam Consumptioniv) Condenser Heat Loadv) Mass flow rate of steam to generate a net power output of 40 Megawatts (MW).vi) Mass flow rate of cooling water required for the condenser if the cooling water inlettemperature is 26 oC and its outlet temperature is limited to 40 oC. The specific heat capacityof the cooling water is 4.18 kJ/kg K.viii) The total amount of sensible heat in kW supplied to the…

Example 4.5: Stem expands in a turbine from 25 bar and 300°C to a condenser pressare of 20 KPa. Evaluate the Rankine cycle efficiency. What is the efficiency if the initial tempprature of steam is 500°C instead of 300°C ? Now if the boiler pressure is increased to 60 bar maintaining the steam temperature at turbine inlet at 500°C, calculate the efficiency. Assume the condenser pressure to rmain constant in all the cases. n-25 bar

Determine the compressor work, W,comp. And the condenser heat transfer, Qc.

Rankine cycle for initially dry saturated steam at 150 psi, condenser pressure of 2 psi. Find the work of cycle in Btu and ft-lb. Also compute the cycle efficiency.Note of the following data from the steam table:At 150 psia: Tsat=358.4 deg. FVf=0.0180 ft3/lb, vg=3.016 ft3/lb; uf=330.2 Btu/lb; ug=1111.2 Btu/lb; hf=330.5 Btu/lb; hfg=863.6 Btu/lb; hg=1194.1 Btu/lb; sf=0.5138 Btu/lbR; sfg=1.0556 Btu/lbR; sg=1.5694 Btu/lbRAt 2 psia: Tsat=126.04 deg. FVf=0.016 ft3/lb, vg=173.75 ft3/lb; uf=94.02 Btu/lb; ug=1051.8 Btu/lb; hf=94.0 Btu/lb; hfg=1022.2 Btu/lb; hg=1116.2 Btu/lb; sf=0.1749 Btu/lbR; sfg=1.7451 Btu/lbR; sg=1.9200 Btu/lbR

2. Draw and Explain Schematic diagram of Geo Thermal power plant. Discuss its advantages.

5.18 : Taking the data of the preceding problem except the final temperature of the cooling water is to be taken to apply to a jet condenser, calculate the weight of injection (cooling) water required per kg of steam.

(a) Based on the analysis of steam power plant having condenser, why thermal efficiency of power plant is high in cold region and less in warm region. Explain with the help of T-s diagram (b) Outline why value of TTD is negative in scenario where we have high pressure heater. Explain with the help of T-L diagram (c) In cogeneration having back pressure turbine process heater replaces condenser, outline the difference between process heater and condenser

A steam power plant operates between a boiler pressure of 68 bar and a condenser pressure of 0.06 bar. Calculate for these limits the cycle the work ratio for a Carnot cycle using wet steam.

Example 7.8. An engine mounted on a ship has a thermal efficiency 80% of that of the corresponding Carnot cycle. The engine receives heat from the sea at 300 K and rejects heat to the atmosphere at 280 K. The work output from the engine is dissipated through an agitator to heat 500 kg of sea water to 355 K. What quantity of heat must be extracted from the sea water to provide the required heating effect ? Take specific heat of sear water C,= 4.186 kJ /kg K.