Chapter 8, Problem 8.11P

What is the pressure in bar at state 6

Reference Book: Introduction to Chemical Engineering Thermodynamics by Smith, Van Ness, etc. 7th or 8th Ed.

Q1) Steam is supplied to a turbine at 30 bar and 350°C, The turbine exhaust pressure is 0.08 bar. The main condensate is heated regene ratively in two stages by steam bled from the turbine at 5 bar and 1.0 bar respectively. Calculate masses of steam bled off at cach pressure per kg of steam entering the turbine and the theoretical thermal efficiency of the cycle. 1 kg Turbine m- me 1-m,-m: Condenser O 1- m, m. h, m he 1 kg fwwww www 1 kg Heater-1 (H.P.) Drain cooler m,+ m m, Heater-2 (LP.)

Steam Plant A steam power plant operates according to the Rankine cycle between a boiler pressure of 4 MPa and condenser pressure of 6.5 kPa. The steam has a temperature of 380 °C at inlet to the first turbine. It is just dry saturated on leaving this turbine for reheating to its original inlet temperature, before passing through a second turbine to the condenser. Draw a T-s diagram to illustrate the reheat cycle, neglect feed-pump terms and calculate the Rankine efficiency and specific steam consumption.

Steam is supplied to a two-stage turbine at 48 bar and 400 °C. It expands in the first turbine until it is just dry saturated, then it is re-heated to 400 °C and expanded through the second-stage turbine. The condenser pressure is 0.04 bar. Low-P High-P turbine turbine Reheater Boiler P4 = P3 = Prcheat Condenser find thespecific heat inputof the systemin kJ/kg to 2.d.p. ?

Superheated steam at a pressure of 10 bar and 400°C is supplied to a steam engine. Adiabatic expansion takes place to release point at 0.9 bar and it exhausts into a condenser at 0.3 bar. Neglecting clearance, for a steam flow rate of 1.5 kg/s determine the quality of steam at the end of expansion and the end of constant volume operation, power developed, specific steam consumption and modified Rankine cycle efficiency.

In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below.   Determine the enthalpy of steam entering the reheater.

Rankine Cycle (Thermodynamics) Show the illustration diagram and complete and step by step solution.

Determine: a)Work of the compressor(kW) b)COP of the cycle