The estimate is that we use more than a hundred-billion Planck units of energy every year. In the Physics literature, natural units are used for energy, namely the Planck energy unit (E p) which is equal to 1.956 x 10^9 J (about 2 Billion Joules). Units: Energy is commonly measured in Joules (J). What happens to energy when it is employed for an objective? Energy degrades when energy is used for an objective. However the amount of energy is unchanges.
Objective: A change in the volume (or shape), chemistry, temperature or density of an object of interest is a possible objective. The task is always to cause a change i.e. The concept of Energy (or more appropriately the concept of the exchange of Energy) is related to the latent ability to perform a task called work, transfer mass or transfer heat. Often encounter power and energy in our daily lives. (The Boiler-BHP power unit is a bit confusing becasue BHP could be confused with brake-horsepower (b hp) which is an auto-industry terminology) One BHP (Boiler Power)= 33,500 BTU/hr = 9.803 kilowatts Power rating of steam-boliers is in units of BHP (boiler -horsepower) Power-Units Conversion 1kW (KiloWatt) = 3414 BTU/hr Power is sometimes expressed in alternate units like BTU/hr or Horsepower (hp) the energy used (or supplied) per unit time. Energy units employed by electric companies are the kWhr (Kilo-Watt-Hour for electric) or Therm (for gas).ġ000J = 1kJ (KiloJoule) = 0.9485 BTU=0.0002778 kWhrġPJ (PetaJoule)= 1,000,000,000,000,000 i.e. The JOULE (J) is a commonly used unit of energy. MHI 101: Energy, Power and Thermodynamics Tutorial
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