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  2. Slip ratio (gas–liquid flow) - Wikipedia

    en.wikipedia.org/wiki/Slip_ratio_(gas–liquid_flow)

    Slip ratio (or velocity ratio) in gas–liquid (two-phase) flow, is defined as the ratio of the velocity of the gas phase to the velocity of the liquid phase. [1] In the homogeneous model of two-phase flow, the slip ratio is by definition assumed to be unity (no slip).

  3. Acceptable quality limit - Wikipedia

    en.wikipedia.org/wiki/Acceptable_quality_limit

    Closely related terms are the rejectable quality limit and rejectable quality level (RQL). [ 1 ] [ 2 ] In a quality control procedure, a process is said to be at an acceptable quality level if the appropriate statistic used to construct a control chart does not fall outside the bounds of the acceptable quality limits.

  4. Own a pool in Southern California? New air-quality rule ...

    www.aol.com/news/own-pool-southern-california...

    The rule will lead to the replacement over three decades of more than 1 million gas-burning appliances — including an estimated 700,000 pool heaters and 300,000 tankless water heaters — with ...

  5. 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]

  6. Environmental quality - Wikipedia

    en.wikipedia.org/wiki/Environmental_quality

    It is a measure of the condition of an environment relative to the requirements of one or more species, any human need or purpose. [ 1 ] Environmental quality includes the natural environment as well as the built environment , such as air , water purity or pollution , noise and the potential effects which such characteristics may have on ...

  7. Here's How Often You Should Drain Your Water Heater ... - AOL

    www.aol.com/heres-often-drain-water-heater...

    Step 3: Attach a water hose to the drain valve at the bottom of your water heater and run the hose outside or into a nearby drain. You can use any generic hose for this step, and a garden hose ...

  8. Is it dangerous to run your AC when air quality is bad? - AOL

    www.aol.com/news/dangerous-run-ac-air-quality...

    Yes, you can run your AC when air quality is bad, as it is currently in much of the United States due to the wildfire smoke from Canada — but only do so if it's recirculating inside air, which ...

  9. Slip factor - Wikipedia

    en.wikipedia.org/wiki/Slip_factor

    Mathematically, the Slip factor denoted by 'σ' is defined as the ratio of the actual & ideal values of the whirl velocity components at the exit of the impeller. The ideal values can be calculated using an analytical approach while the actual values should be observed experimentally.

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