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  2. Cooling load temperature difference calculation method

    en.wikipedia.org/wiki/Cooling_load_temperature...

    The CLF is the cooling load at a given time compared to the heat gain from earlier in the day. [1] [5] The SC, or shading coefficient, is used widely in the evaluation of heat gain through glass and windows. [1] [5] Finally, the SCL, or solar cooling load factor, accounts for the variables associated with solar heat load.

  3. Coefficient of performance - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_performance

    As the formula shows, the COP of a heat pump system can be improved by reducing the temperature gap (=) at which the system works. For a heating system this would mean two things: For a heating system this would mean two things:

  4. Cooling load - Wikipedia

    en.wikipedia.org/wiki/Cooling_load

    The cooling load [3] is calculated to select HVAC equipment that has the appropriate cooling capacity to remove heat from the zone. A zone is typically defined as an area with similar heat gains, similar temperature and humidity control requirements, or an enclosed space within a building with the purpose to monitor and control the zone's temperature and humidity with a single sensor e.g ...

  5. Specific fan power - Wikipedia

    en.wikipedia.org/wiki/Specific_fan_power

    In reality the fan system efficiency is often in the range 0 to 60% (i.e. <); it is lowest for small fans or inefficient operating points (e.g. throttled flow or free-flow). The efficiency is a function of the total losses in the fan system, including aerodynamic losses in the fan, friction losses in the drive (e.g. belt), losses in the ...

  6. Affinity laws - Wikipedia

    en.wikipedia.org/wiki/Affinity_laws

    The affinity laws (also known as the "Fan Laws" or "Pump Laws") for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power. They apply to pumps, fans, and hydraulic turbines. In these rotary implements ...

  7. Heat pump and refrigeration cycle - Wikipedia

    en.wikipedia.org/wiki/Heat_pump_and...

    Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. [1] A heat pump is a mechanical system that transmits heat from one location (the "source") at a certain temperature to another location (the "sink" or "heat sink") at a higher temperature. [2]

  8. Pinch analysis - Wikipedia

    en.wikipedia.org/wiki/Pinch_analysis

    HeatIT - Free (light) version of Pinch Analysis software that runs in Excel - developed by Pinchco, a consultancy company offering expert advice on energy related matters; Simulis Pinch - Tool from ProSim SA that can be used directly in Excel and that is dedicated to the diagnosis and the energy integration of the processes.

  9. ASHRAE 90.1 - Wikipedia

    en.wikipedia.org/wiki/ASHRAE_90.1

    ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings Except Low-Rise Residential Buildings is an American National Standards Institute (ANSI) standard published by ASHRAE and jointly sponsored by the Illuminating Engineering Society (IES) that provides minimum requirements for energy efficient designs for buildings except for low-rise residential buildings (i.e. single-family homes ...

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