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  2. Annual fuel utilization efficiency - Wikipedia

    en.wikipedia.org/wiki/Annual_fuel_utilization...

    The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

  3. Economizer - Wikipedia

    en.wikipedia.org/wiki/Economizer

    On average over the years, [clarification needed] boiler combustion efficiency has risen from 80% to more than 95%. The efficiency of heat produced is directly linked to boiler efficiency . The percentage of excess air and the temperature of the combustion products are two key variables in evaluating this efficiency.

  4. Circulating fluidized bed - Wikipedia

    en.wikipedia.org/wiki/Circulating_fluidized_bed

    (a) Fixed Bed: When the fluid is passed through the bottom of the bed at a low flow rate, the fluid merely percolates through the void spaces between stationary particles. (b) Minimum fluidization: When the gas velocity reaches (U mf) minimum fluidization velocity, and all the particles are just suspended by the upward flowing fluid.

  5. High-yield savings rates for March 3, 2025 - AOL

    www.aol.com/finance/savings-interest-rates-today...

    Get today's best rates on high-yield FDIC-insured savings accounts to more quickly grow your everyday cash, build an emergency reserve or save for a successful retirement.

  6. Corex Process - Wikipedia

    en.wikipedia.org/wiki/Corex_Process

    The Corex Process is a smelting reduction process created by Primetals Technologies as a more environmentally friendly alternative to the blast furnace. [1] Presently, the majority of steel production is through the blast furnace which has to rely on coking coal [2] and requires a sinter plant in order to prepare the iron ore for reduction. [3]

  7. Best CD rates for March 3, 2025 - AOL

    www.aol.com/finance/best-cd-rates-today-fortify...

    1.80%. 1.82%. Down 2 basis points. 24-month (2 year) CD ... projects a 95% chance that the Fed keeps rates ... The core difference between saving and investing lies in the accessibility of your ...

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