In every energy transactions, some of the energy is also lost as heat.
That is correct! In almost every energy transaction or transformation, a portion of the energy involved is lost as heat. This loss of energy as heat is referred to as energy dissipation or waste heat.
The concept of energy being lost as heat can be explained by the principle of the conservation of energy, also known as the First Law of Thermodynamics. According to this principle, energy cannot be created or destroyed, but it can be converted from one form to another.
For example, let's consider the energy transfer that occurs when you convert chemical energy stored in fossil fuels into electrical energy. When we burn fossil fuels in power plants to produce electricity, only a fraction of the chemical energy stored in the fuel is converted into useful electrical energy. The rest is given off as waste heat. This heat is typically released into the atmosphere or dissipated through cooling systems.
Similarly, in many other energy transformations, such as mechanical energy to electrical energy or electrical energy to light energy, some portion of the energy is also lost as heat. This is due to inefficiencies in the systems or devices used to convert and transfer energy.
Minimizing energy losses as heat is a key aspect of improving energy efficiency. By reducing energy dissipation, we can make energy systems more sustainable and reduce environmental impacts.