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Notes-unit-I - I unit Notes
Energy Technology (Anna University)
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OCH353–ENERGY TECHNOLOGY
UNIT WISE NOTES
FOR VII SEMESTER B.E. DEGREE COURSE [REGULATION - 2021]
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UNIT I INTRODUCTION
Any physical activity in this world, whether carried out by human beings or by nature, is cause due to flow
of energy in one form or the other. The word ‘energy’ itself is derived from the Greek word ‘en-ergon’,
which means ‘in-work’ or ‘work content’. The work output depends on the energy input.
Energy is one of the major inputs for the economic development of any country. In the case of the
developing countries, the energy sector assumes a critical importance in view of the ever increasing
energy needs requiring huge investments to meet them.
Energy can be classified into several types based on the following criteria:
• Primary and Secondary energy
• Commercial and Non-commercial energy
• Renewable and Non-Renewable energy
• Conventional and Non-conventional energy
1.1 Primary and Secondary Energy
Primary energy sources are those that are either found or stored in nature. Common primary energy
sources are coal, oil, natural gas, and biomass (such as wood). Other primary energy sources available
include nuclear energy from radioactive substances, thermal energy stored in earth's interior, and potential
energy due to earth's gravity.
Downloaded by Rajeswari.N 20AG029 ()
Notes-unit-I - I unit Notes
Energy Technology (Anna University)
Scan to open on Studocu
Studocu is not sponsored or endorsed by any college or university
Downloaded by Rajeswari.N 20AG029 ()
, lOMoARcPSD|50461511
OCH353–ENERGY TECHNOLOGY
UNIT WISE NOTES
FOR VII SEMESTER B.E. DEGREE COURSE [REGULATION - 2021]
Downloaded by Rajeswari.N 20AG029 ()
, lOMoARcPSD|50461511
UNIT I INTRODUCTION
Any physical activity in this world, whether carried out by human beings or by nature, is cause due to flow
of energy in one form or the other. The word ‘energy’ itself is derived from the Greek word ‘en-ergon’,
which means ‘in-work’ or ‘work content’. The work output depends on the energy input.
Energy is one of the major inputs for the economic development of any country. In the case of the
developing countries, the energy sector assumes a critical importance in view of the ever increasing
energy needs requiring huge investments to meet them.
Energy can be classified into several types based on the following criteria:
• Primary and Secondary energy
• Commercial and Non-commercial energy
• Renewable and Non-Renewable energy
• Conventional and Non-conventional energy
1.1 Primary and Secondary Energy
Primary energy sources are those that are either found or stored in nature. Common primary energy
sources are coal, oil, natural gas, and biomass (such as wood). Other primary energy sources available
include nuclear energy from radioactive substances, thermal energy stored in earth's interior, and potential
energy due to earth's gravity.
Downloaded by Rajeswari.N 20AG029 ()
