Primary energy refers to energy that is available in its natural form and has not yet been subjected to any conversion or transformation processes. This type of energy is found in nature and can be harnessed for use in various applications, such as electricity generation, heating, or transportation. Examples of primary energy sources include: - **Fossil Fuels**: Coal, oil, and natural gas, which are formed from the remains of ancient organisms.
Articles by others on the same topic
Energy measured at the resource or initial-input stage before downstream conversion to final useful energy. Comparisons with electrical output must state the accounting convention and avoid treating a primary-energy thermal input as the same service as delivered electricity.