Chapter 9, Problem 9.82P

A Steam power plant uses a Rankine cycle to produce electrical power. The boiler pressure is 2 MPa and the temperature at the turbine inlet is 300C. The pump inlet pressure is 0.025 MPa and the entropy is 0.8931 kJ/kg-k. The turbine gives 1MW of work to the generator. Find the dryness of the steam at turbine exit, Wp, Qa, Qr, Wt, Wnet, efficiency, SR, and mass flow rate of steam. (84.65%, 2.0143 kJ/kg, 2749.56 kJ/kg, 1986.15 kJ/kg, 765.42 kJ/kg, 763.41 kJ/kg, 27.76%, 4.7157 kg/kWh, 1.3064 kg/s) -Draw the T-S diagram with properly labelled points and solve the problems. Show your COMPLETE solution - Use the Steam Table provided if necessary.

Derive an expression for thermal efficiency of Brayton cycle.

Cogeneration is often used where a steam supply is needed for industrial process energy. Assume a supply of 5 kg/s steam at 0.5 MPa is needed. Rather than generating this from a pump and boiler, the setup in below. is used so the supply is extracted from the high-pressure turbine. Find the power the turbine now cogenerates in this process. 2 3 HP LP

find the specific enthalphy at each point of the cycle, the amount of heat added, heat rejected, turbine work, pump work, net work and thermal efficiency in a carnot cycle between pressure limits of 3MPa and 10KPa

A geothermal power plant has the thermal energy at well head of 1,289 KJ, mass of the liquid of 82 kg, and specific enthalpy at final stage of 4.12 KJ/KG, what is the value of work at the heat utilization system of the plant?

The efficiency of Carnot cycle operating at a maximum temperature of 460 oF is 50 %. Find the minimum temperature of the cycle.

Carnot cycle operates between 30°C and 350°C. Find the cycle efficiency.

The cycle comes with a net power cycle of 25.40 kW. The heat that goes out is 42.30 kW. Find the efficiency of the cycle?

A geothermal power plant uses earth steam at 400 K and cooling water at 300 K.a. What is the value of maximum efficiency? b. Suppose the actual efficiency is 18% and the plant generates electricity at the rate of 200MW. How much work is lost each day? c. How much entropy is created each day?