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GATE 2019: Thermodynamics Quiz 11

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Question 1

A thermal electric power plant produces 5000 MW of power. If the coal releases 70 x 10⁵ kJ/sec of energy, then what is the rate at which heat is rejected from the power plant?

Question 2

The efficiency of cogeneration power plant and the power generation in india approximately?

Question 3

In a single heater regenerative cycle, steam enters the turbine at 30 bar 300 °C and condenser pressure is 0.1 bar. The feed water heater is direct contact type which operates at 5 bar. Calculate the steam extracted from turbine to heater (in kg/kg of steam flow) in the cycle. The enthalpies of steam at different locations of the cycle are given in the table below. Pump work may be neglected.

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Question 4

The values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle are 2800 kJ/kg and 1800 kJ/kg respectively. Neglecting pump work, the specific steam consumption in kg/kW-hour is

Question 5

In a Rankine cycle, the enthalpies at turbine entry and outlet are 3159 kJ/kg and 2187 kJ/kg respectively. If the specific pump work is 2 kJ/ kg. The specific steam consumption (in kg/kW-h) of the cycle based on net output is _________

Question 6

Steam with specific enthalpy (h) 3214 kJ/kg enters an adiabatic turbine operating at steady state with a flow rate 10 kg/s. As it expands, at a point where h is 2920 kJ/kg, 1.5 kg/s is extracted for heating purposes. The remaining 8.5 kg/s further expands to the turbine exit, where h = 2374 kJ/kg. Neglecting changes in kinetic and potential energies, the net power output (in kW) of the turbine is _____

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ESE & GATE ME Thermodynamics

Apr 16ESE & GATE ME