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  2. Orders of magnitude (power) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(power)

    units: approximately 1000 BTU/hour 3 × 10 2: tech: PC GPU Nvidia GeForce RTX 4080 peak power consumption [20] 4 × 10 2: tech: legal limit of power output of an amateur radio station in the United Kingdom 5 × 10 2: biomed: power output (useful work plus heat) of a person working hard physically 7.457 × 10 2: units: 1 horsepower [21] 7.5 × 10 2

  3. Orders of magnitude (energy) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(energy)

    Inflight 100-ton Boeing 757-200 at 300 knots (154 m/s) 1.4×10 9 J: Theoretical minimum amount of energy required to melt a tonne of steel (380 kWh) [132] [133] 2×10 9 J: Energy of an ordinary 61 liter gasoline tank of a car. [106] [134] [135] 2×10 9 J: Unit of energy in Planck units, [136] roughly the diesel tank energy of a mid-sized truck ...

  4. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    A COP of 4 means the heat pump produces 4 units of heat energy for every 1 unit of electricity it consumes. Within temperature ranges of −3 °C (27 °F) to 10 °C (50 °F), the COP for many machines is fairly stable. Approximately TheoreticalMaxCOP = (desiredIndoorTempC + 273) ÷ (desiredIndoorTempC - outsideTempC).

  5. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    An ideal electrolysis unit operating at a temperature of 25 °C having liquid water as the input and gaseous hydrogen and gaseous oxygen as products would require a theoretical minimum input of electrical energy of 237.129 kJ (0.06587 kWh) per gram mol (18.0154 gram) of water consumed and would require 48.701 kJ (0.01353 kWh) per gram mol of ...

  6. Energy intensity - Wikipedia

    en.wikipedia.org/wiki/Energy_intensity

    An inverse way of looking at the issue would be an 'economic energy efficiency,' or economic rate of return on its consumption of energy: how many economic units of GDP are produced by the consumption of units of energy. Referring to the above examples, 1 million Btus consumed with an energy intensity of 8,553 produced $116.92 of GDP for the US ...

  7. Kilowatt-hour - Wikipedia

    en.wikipedia.org/wiki/Kilowatt-hour

    A kilowatt is a unit of power (rate of flow of energy per unit of time). A kilowatt-hour is a unit of energy. Kilowatt per hour would be a rate of change of power flow with time. Work is the amount of energy transferred to a system; power is the rate of delivery of energy. Energy is measured in joules, or watt-seconds.