3. Water is the working fluid in a Rankine cycle. Superheated vapor enters the turbine at 10 MPa, 480 C, and the condenser pressure is 6 kPa. The turbine and pump have isentropic efficiencies of 80% and 70% respectively. Determine for the cycle (a) the heat transfer to the working fluid passing through the steam generator in kJ/kg, (b) the thermal efficiency, and (c) The heat transfer from the working fluid passing through the condenser to the cooling water in kJ/kg

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

On a average work day more than work place firs are reorted