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  2. Vapor-compression refrigeration - Wikipedia

    en.wikipedia.org/wiki/Vapor-compression...

    A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.

  3. 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]

  4. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/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. [1] 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 (e.g. start the ...

  5. Alternating current - Wikipedia

    en.wikipedia.org/wiki/Alternating_current

    A schematic representation of long distance electric power transmission. From left to right: G=generator, U=step-up transformer, V=voltage at beginning of transmission line, Pt=power entering transmission line, I=current in wires, R=total resistance in wires, Pw=power lost in transmission line, Pe=power reaching the end of the transmission line, D=step-down transformer, C=consumers.

  6. 6 things you should do to make sure your air conditioner is ...

    www.aol.com/news/6-things-sure-air-conditioner...

    Changing out your air conditioning filter is a great way to keep you a/c clean and free from any blockage, according to Hamilton. “Keeping your filter clean is one of the most important things ...

  7. Refrigeration - Wikipedia

    en.wikipedia.org/wiki/Refrigeration

    Refrigeration has many applications, including household refrigerators, industrial freezers, cryogenics, and air conditioning. [5] [6] [7] Heat pumps may use the heat output of the refrigeration process, and also may be designed to be reversible, but are otherwise similar to air conditioning units. [5]

  8. 10 Old Tech Gadgets Worth a Pretty Penny Today

    www.aol.com/finance/10-old-tech-gadgets-worth...

    While well-preserved vintage consoles can sell for anywhere from $100 to $500, rare editions that include games like “Air Raid,” “Frogger,” and “Donkey Kong” can command much higher ...

  9. Khloé Kardashian Shares Why She and Her 2 Kids Are Missing ...

    www.aol.com/lifestyle/khlo-kardashian-shares-why...

    Khloé Kardashian's Christmas Eve plans are being put on hold. The Good American co-founder, 40, shared a photo on her Instagram Stories, writing that she and her two kids — Tatum, 2, and True ...

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