Steam enters the steam-generating unit (SGU) of a power plant at a pressure of 20 bar and dryness of 0.9 and leaves at the same pressure at a temperature of 350°C. Determine the heat transfer during the process in kJ/s if the mass flow rate of the steam is 3.075 kg/s. At 20 bar: hf = 908.79 kJ/kg, hfg = 1890.7 kJ/kg. At 20 bar and 350°C: h = 3137.0 kJ/kg.

A gas with specific volume v₁ = 1 m³/Kg and pressure p₁=1bar in a closed system undergoes a thermodynamic cycle which consists of the following three separate processes: 1->2: Isobaric compression to v₂-0.25 m³/Kg 2->3: Isometric heating. 3->1: Isothermal expansion (pV = constant) to the initial volume. Calculate the specific work produced by the gas per cycle. Present your answer in kJ/kg.

q2,cd

Steam enters the superheaters of a boiler at a pressure of 25 bar and dryness of 0.98 and leaves at the same pressure at a temperature of 370 degrees C. Calculate the heat energy supplied per kg of steam supplied in the superheaters. Steam properties are: At 25 bar and 370 °C h=3171.8 kJ/kg At 25 bar and 0.98 dryness; hf = 962.11 kJ/kg hfg = 1841.0 kJ/kg|