Question: Explain the need of co-generation plants helps for energy conservation.
Ans:
Need of Co-generation:
1) In conventional power plant efficiency is only 35% and remaining 65% of energy is lost.
2) The conventional system uses energy of fuel to produce electrical energy or thermal energy whereas co-generation system produces both electrical and thermal energy from both fuels.
3) The overall efficiency of energy use in co-generation can be up to 85% or above.
4) Lower volume of CO2 compared to the conventional system where separate production of electricity and heat.
5) In Co-generation system, heat generated is byproduct in electricity generation process.
6) Limited need of cooling water in co-generation system, therefore reduces thermal pollution.
Question : State any four merits of co-generation system.
Ans:
Merits of co-generation:
1) Co-generation can meet both power & heat needs.
2) A much more efficient use of primary energy can be achieved as compared to
separate production of electricity and heat.
3) Many times it is implemented in a very cost effective manner.
4) Increases overall efficiency of system
5) Reduction in emission of pollutants due to reduced fuel consumption.
6) Helps to maintain grid stability.
7) In co-generation heat is byproduct of electricity generation process.
8) Due to decentralization of electricity, it avoids transmission losses and makes
system more flexible.
Question : Draw layout of steam turbine cogeneration system and label it.
Ans:
Steam turbine cogeneration system:
Ans:
Need of Co-generation:
1) In conventional power plant efficiency is only 35% and remaining 65% of energy is lost.
2) The conventional system uses energy of fuel to produce electrical energy or thermal energy whereas co-generation system produces both electrical and thermal energy from both fuels.
3) The overall efficiency of energy use in co-generation can be up to 85% or above.
4) Lower volume of CO2 compared to the conventional system where separate production of electricity and heat.
5) In Co-generation system, heat generated is byproduct in electricity generation process.
6) Limited need of cooling water in co-generation system, therefore reduces thermal pollution.
Question : State any four merits of co-generation system.
Ans:
Merits of co-generation:
1) Co-generation can meet both power & heat needs.
2) A much more efficient use of primary energy can be achieved as compared to
separate production of electricity and heat.
3) Many times it is implemented in a very cost effective manner.
4) Increases overall efficiency of system
5) Reduction in emission of pollutants due to reduced fuel consumption.
6) Helps to maintain grid stability.
7) In co-generation heat is byproduct of electricity generation process.
8) Due to decentralization of electricity, it avoids transmission losses and makes
system more flexible.
Question : Draw layout of steam turbine cogeneration system and label it.
Ans:
Steam turbine cogeneration system:
