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  2. Otto cycle - Wikipedia

    en.wikipedia.org/wiki/Otto_cycle

    The cycle is closed by the exhaust (4-0 and colored blue) stroke, characterized by isochoric cooling and isobaric compression processes. Temperature-Entropy diagram An Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine .

  3. Thermal expansion valve - Wikipedia

    en.wikipedia.org/wiki/Thermal_expansion_valve

    A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible.A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator.

  4. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    = cross-sectional area of opening, ft² (assumes equal area for inlet and outlet) C d = Discharge coefficient for opening (typical value is 0.65) g = gravitational acceleration, around 32.2 ft/s² on Earth H d = Height from midpoint of lower opening to midpoint of upper opening, ft T I = Average indoor temperature between the inlet and outlet ...

  5. Internal combustion engine - Wikipedia

    en.wikipedia.org/wiki/Internal_combustion_engine

    The exhaust port is connected directly to the cylinder wall. The transfer and exhaust port are opened and closed by the piston. The reed valve opens when the crankcase pressure is slightly below intake pressure, to let it be filled with a new charge; this happens when the piston is moving upwards.

  6. Ventilation (architecture) - Wikipedia

    en.wikipedia.org/wiki/Ventilation_(architecture)

    The house opens onto a central atrium with an impluvium (open to the sky); the evaporative cooling of the water causes a cross-draft from atrium to garden. Primitive ventilation systems were found at the Pločnik archeological site (belonging to the Vinča culture ) in Serbia and were built into early copper smelting furnaces.

  7. Stack effect - Wikipedia

    en.wikipedia.org/wiki/Stack_effect

    The rising warm air reduces the pressure in the base of the building, drawing cold air in through either open doors, windows, or other openings and leakage. During the cooling season, the stack effect is reversed, but is typically weaker due to lower temperature differences. [1]

  8. Fume hood - Wikipedia

    en.wikipedia.org/wiki/Fume_hood

    The bypass is located so that as the user closes the sash, the bypass opening gets larger; when the sash is fully closed, air flows only through the airfoil underneath the bottom of the sash window. [ 38 ] : 12 The air going through the hood maintains a constant volume no matter where the sash is positioned and without changing fan speeds.

  9. Passive cooling - Wikipedia

    en.wikipedia.org/wiki/Passive_cooling

    Windows can be left open around the clock. Night flushing (also known as night ventilation, night cooling, night purging, or nocturnal convective cooling) is a passive or semi-passive cooling strategy that requires increased air movement at night to cool the structural elements of a building.

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