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  2. Mechanical efficiency - Wikipedia

    en.wikipedia.org/wiki/Mechanical_efficiency

    In mechanical engineering, mechanical efficiency is a dimensionless ratio that measures the efficiency of a mechanism or machine in transforming the power input to the device to power output. A machine is a mechanical linkage in which force is applied at one point, and the force does work moving a load at another point.

  3. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    Mechanical efficiency, where one form of mechanical energy (e.g. potential energy of water) is converted to mechanical energy ; Thermal efficiency or Fuel efficiency, useful heat and/or work output per input energy such as the fuel consumed; 'Total efficiency', e.g., for cogeneration, useful electric power and heat output per fuel energy ...

  4. Mechanical advantage - Wikipedia

    en.wikipedia.org/wiki/Mechanical_advantage

    The actual mechanical advantage (AMA) is the mechanical advantage determined by physical measurement of the input and output forces. Actual mechanical advantage takes into account energy loss due to deflection, friction, and wear. The AMA of a machine is calculated as the ratio of the measured force output to the measured force input,

  5. Engine efficiency - Wikipedia

    en.wikipedia.org/wiki/Engine_efficiency

    The efficiency of internal combustion engines depends on several factors, the most important of which is the expansion ratio. For any heat engine the work which can be extracted from it is proportional to the difference between the starting pressure and the ending pressure during the expansion phase.

  6. Thermal efficiency - Wikipedia

    en.wikipedia.org/wiki/Thermal_efficiency

    Output (mechanical) energy is always lower than input energy. In general, energy conversion efficiency is the ratio between the useful output of a device and the input, in energy terms.

  7. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    Seasonal energy efficiency ratio (SEER) is mostly used for air conditioning. SCOP is a new methodology that gives a better indication of expected real-life performance, using COP can be considered using the "old" scale. Seasonal efficiency gives an indication on how efficiently a heat pump operates over an entire cooling or heating season. [14]

  8. 10 best Walmart Advent calendars that haven't sold out yet

    www.aol.com/lifestyle/best-advent-calendars-that...

    It's Advent calendar season, and if you haven't picked up your treat for the year, you may have missed your window. Many of the year's best Advent calendars have sold out already, like the Bonne ...

  9. Thermodynamic pump testing - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_pump_testing

    The thermodynamic method takes advantage of this fact, and precisely measures the temperature difference across a pump to calculate the pump's efficiency. Pressure measurements are used to calculate the head of the pump, and a power meter is used to measure input power to the pump.