What are the key calculations for a power plant's efficiency and energy loss?

In summary, the conversation is about a power plant with a heat source temperature of 900C and a heat sink temperature of 25C. The conversation includes calculations for the maximum efficiency of the power cycle, power input, energy loss, and fuel consumption. It also mentions drawing an energy flow diagram and discussing the thermally efficient cycle.
  • #1
Grigoris_Da
1
0
Hello can somebody please help me on that problem?

If heat source and heat sink temperature of a power plant is 900C and 25C respectively, then
i) Calculate the maximum efficiency of the power cycle
ii) Calculate the power input if the output is 210MW
iii) Calculate energy loss from cycle
iv) Draw the energy flow diagram (sankey diagram) of the plant
v) Calculate the fuel consumption flow rate if the plant operates on natural gas with Gross calorific value of 39MJ/m3
vi) If the actual efficiency of the power plant is 35%, then explain where the energy is lost.
 
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  • #2
Hint: What is the most thermally efficient cycle?
 

What is thermodynamics?

Thermodynamics is the branch of physics that deals with the relationship between heat, energy, and work. It studies the behavior of systems, such as gases and liquids, and how they respond to changes in temperature, pressure, and volume.

What are the laws of thermodynamics?

The first law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another. The second law states that the total entropy of a closed system will either remain constant or increase over time. The third law states that absolute zero cannot be reached through a finite number of processes.

What is heat?

Heat is a form of energy that is transferred from one body or system to another due to a difference in temperature. It can be measured in units of joules (J) or calories (cal), and is commonly associated with the sensation of warmth.

What is the difference between heat and temperature?

Temperature is a measure of the average kinetic energy of particles in a substance, while heat is the transfer of thermal energy from one body to another. In other words, temperature refers to the amount of heat present, rather than the heat itself.

How is thermodynamics applied in real life?

Thermodynamics has many practical applications, such as in the design of engines, refrigeration systems, and power plants. It also plays a role in understanding weather patterns, chemical reactions, and the behavior of materials. Additionally, thermodynamics is used in fields such as biology, geology, and environmental science to study natural processes and systems.

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