A reheat cycle with two stages of reheating is executed, with steam expanding initially from 2250 psia and 1060 0F. The two reheater pressures are 580 psia and 150 psia, and steam leaves each reheater at 1000 0F. Condensation occurs at 40 psia. Find a) the cycle efficiency, % b) the steam rate, in kg/kwhr c) if there is no reheater compute for the exhaust enthalpy if the efficiency of turbine and pump are both 82% and d) find its thermal efficiency.

5. A boiler produces 5000kPa steam which is 67% dry, from boiler feed water flow rate is 960 kg/min, a) Find the heat rate in kJ/hr. 100°C. If the mass b) What is the equivalent evaporation? c) What is the factor of evaporation? d) What is the boiler efficiency if the fuel has a calorific value of 35MJ/kg, and its consumption is 3.5tonnes/hr.?

The condensing pressure for a Rankine engine is 0.001325  MPavac. Calculate the following for steam flow rate  =  1 kg/sec of steam when the steam at the beginning of expansion is at 119.6 deg SH and 4.0 Mpaa.  Draw the TS and equipment diagrams for the ideal and actual case and find for the following for the ideal case: Ideal turbine work (KW). Ans.____________________________ Heat rejected at condenser (KJ/sec). Ans.____________________________ Mass of cooling water in kg/sec if cp H2O = 4.18 KJ/kg-K, and inlet temp of water to condenser = 20 deg C, outlet temp is 35 deg C. Ans.____________________________ Pump work in KW. Ans.___________________________

A Rankine cycle is used for a steam power plant. Liquid first enters the turbine at 2.25 MPa and 300C then exits at 0.025 MPa. The pump receives saturated liquid from the condenser before sending it to the boiler at the original pressure.a.) Draw the T-S diagram. b.) Find the dryness at turbine exit,c.) Wp, d.) Qa, e.) Qr, f.) Wt, g.) Wnet (kJ/kg), h.) Efficiency(%),and i.) Steam rate(kg/kWh)

d) The condenser of a thermal power plant is to be cooled by a nearby river at 14.5°C, allowing a temperature gradient of 11.5°C for effective heat transfer, stating your reasons, calculate the minimum condenser pressure in bar.

I need correct answer in 20 minutes please Find the cycle efficiency and specific steam consumption of a reheat cycle (Fig. 2.7a) operating between pressures of 3 MPa and 0.004 MPa, with superheat temp of 450 °C. Assume that the first expansion is carried out to the point where the steam is dry saturated and then the steam is reheated to the original superheat temp. The feed pump term may be neglected Boiler Reheater a High-P turbine. P = Ps= Preheal Pump Condenser Low-P turbine Figure (2.7 a) High-pressure turbine Reheating Low-pressure turbine

ig waer, 20 kg/s K 20°C V satureted ba. 20と overall H.T. coeFF. i) 200o Wnek H.T. rete in he HX 2300 kW :) heat transpfer area i) rate condensation OF steam ? OF

a steam 8.0 MPa and 485 degree Celsius enters the turbine and expand at condenser pressure of 0.006 mpa for cycle and 1kg of steam. determine A.) heat added, B.) Wnet, C.) Thermal Efficiency.  And for the engine, Determine the steam flow and the energy output of 40,000 Kw, E.) Wturbine, F.) Energy Chargable, G.) Ideal Heat rate

Q.2: A refrigeration system using refrigerant 22 is to have a refrigerating capacity of 80 kW. The cycle is a standard vapor-compression cycle in which the evaporating temperature 42°C. -8°C and the condensing temperature (a) Determine the volume flow of refrigerant measured in cubic is meters inlet at the to the compressor. second per (b) Calculate the power required by the compressor. (c) At the entrance to the evaporator what is the fraction of vapor in the mixture.

The figure below is the basic plot of pressure vs. volume for the Dual Standard Cycle. Constant pressure heat addition 3 4 PV = constant Нeat IN Adiabatic expansion Heat OUT (Constant volume heat rejection) Constant volume heat addition 1 Adiabatic compression Volume (V) Using the Dual Air Standard Cycle and the following data: • Assume constant properties of air. R= 287 J/kgK; Cp = 1005 J/kgK; Cv = 718 J/kgK; y = 1.4 Cycle compression ratio = 11 (v1/v2) Air conditions prior to compression: Pressure = 1.6 bar; Temperature = 298K Heat added at constant volume = 290000 J/kg %3D Heat added at constant pressure = 579000 J/kg Pressure (P) 2]