In a steam power plant, the condition of steam at inlet to turbine is 20 bar...

Transcribed Image Text:

In a steam power plant, the condition of steam at inlet to turbine is 20 bar and 300°C and the condenser pressure is 10 kPa. Two feed water heaters operate at 5 bar and 1 bar respectively. Mass of steam bled per kg of steam flow at second feed water heater (The feed water heater operating at 1 bar) is At P = 20 bar; T=300°C; h = 3025 kJ/kg Enthalpy of steam entering first feed water heater = 2725 kJ/kg Enthalpy of steam entering second feed = 2460 kJ/kg water heater Enthalpy of steam entering the condenser is = 2140 kJ/kg Enthalpy of steam entering leaving the condenser = = 191.83 kJ/kg At 1 bar; hf=417.5 kJ/kg At 5 bar; hf= 641.21 kJ/kg Neglect the pump work and assume isentropic expansion in turbine (a) 0.09 kg (c) 0.04 kg (b) 0.05 kg (d) 0.06 kg In a steam power plant, the condition of steam at inlet to turbine is 20 bar and 300°C and the condenser pressure is 10 kPa. Two feed water heaters operate at 5 bar and 1 bar respectively. Mass of steam bled per kg of steam flow at second feed water heater (The feed water heater operating at 1 bar) is At P = 20 bar; T=300°C; h = 3025 kJ/kg Enthalpy of steam entering first feed water heater = 2725 kJ/kg Enthalpy of steam entering second feed = 2460 kJ/kg water heater Enthalpy of steam entering the condenser is = 2140 kJ/kg Enthalpy of steam entering leaving the condenser = = 191.83 kJ/kg At 1 bar; hf=417.5 kJ/kg At 5 bar; hf= 641.21 kJ/kg Neglect the pump work and assume isentropic expansion in turbine (a) 0.09 kg (c) 0.04 kg (b) 0.05 kg (d) 0.06 kg

Answer rating: 100% (QA)

The detailed ... View the full answer