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  2. Air cycle machine - Wikipedia

    en.wikipedia.org/wiki/Air_cycle_machine

    An air cycle machine ( ACM) is the refrigeration unit of the environmental control system (ECS) used in pressurized gas turbine -powered aircraft. Normally an aircraft has two or three of these ACM. Each ACM and its components are often referred as an air conditioning pack. The air cycle cooling process uses air instead of a phase changing ...

  3. Passive cooling - Wikipedia

    en.wikipedia.org/wiki/Passive_cooling

    Passive cooling. A traditional Iranian solar cooling design using a wind tower. Passive cooling is a building design approach that focuses on heat gain control and heat dissipation in a building in order to improve the indoor thermal comfort with low or no energy consumption. [1] [2] This approach works either by preventing heat from entering ...

  4. Free cooling - Wikipedia

    en.wikipedia.org/wiki/Free_cooling

    Free cooling is an economical method of using low external air temperatures to assist in chilling water, which can then be used for industrial processes, or air conditioning systems. The chilled water can either be used immediately or be stored for the short- or long-term. When outdoor temperatures are lower relative to indoor temperatures ...

  5. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    Air conditioning can be achieved using a mechanical 'air conditioner' or by other methods, including passive cooling and ventilative cooling. [2] [3] Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). [4] Heat pumps are similar in many ways to air conditioners, but ...

  6. Extreme heat cuts into US small business, worker hours in ...

    www.aol.com/news/extreme-heat-cuts-us-small...

    Record-breaking heat waves across the U.S. forced small businesses to close early in July, according to a report released on Tuesday, and reduced paid working hours for employees as dangerous ...

  7. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC control system. HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken ...

  8. Nashville heat wave: How vulnerable residents can keep cool ...

    www.aol.com/nashville-heat-wave-vulnerable...

    The Metro Action Commission is hoping to help. Through the Summer Cooling Program, eligible residents can receive a free fan or air conditioning unit and, in some circumstances, both, between now ...

  9. Air source heat pump - Wikipedia

    en.wikipedia.org/wiki/Air_source_heat_pump

    An air source heat pump ( ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction. ASHPs are the most common type of heat pump and, usually being smaller, tend to be used ...

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