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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. Energy factor - Wikipedia

   en.wikipedia.org/wiki/Energy_factor

   The energy factor metric only applies to residential water heaters, which are currently defined by fuel, type, and input capacity. [5] Generally, the EF number represents the thermal efficiency of the water heater as a percentage, since it is an average of the ratio of the theoretical heat required to raise the temperature of water drawn to the amount of energy actually consumed by the water ...

4. 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.

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

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

   Step 2: Next, disconnect the power to the water heater or shut off the gas supply. The water inside the tank will be hot, so you’ll want to wait for the tank to cool completely, typically just a ...

6. Water heating - Wikipedia

   en.wikipedia.org/wiki/Water_heating

   Under the pre-2015 standard, a 75 US gal (280 L; 62 imp gal) gas storage water heater with a nominal input of 22 kW (75,000 BTU/h) or less was able to have an energy factor as low as 53%, while under the 2015 standard, the minimum energy factor for a 75-US-gallon gas storage tank water heater is now 74%, which can only be achieved by using ...

7. Diesel fuel - Wikipedia

   en.wikipedia.org/wiki/Diesel_fuel

   Diesel fuel is commonly used in oil and gas extracting equipment, although some locales use electric or natural gas powered equipment. Tractors and heavy equipment were often multifuel in the 1920s through 1940s, running either spark-ignition and low-compression engines, akryod engines, or diesel engines.