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  2. Turndown ratio - Wikipedia

    en.wikipedia.org/wiki/Turndown_ratio

    A thermal mass flow meter has a turndown ratio of 1000:1. An orifice plate meter has a practical turndown ratio of 3:1. A turbine meter has a turndown ratio of 10:1. Rotary positive displacement meters have a turndown ratio of between 10:1 and 80:1, depending on the manufacturer and the application.

  3. NTU method - Wikipedia

    en.wikipedia.org/wiki/NTU_Method

    The number of transfer units (NTU) method is used to calculate the rate of heat transfer in heat exchangers (especially parallel flow, counter current, and cross-flow exchangers) when there is insufficient information to calculate the log mean temperature difference (LMTD). Alternatively, this method is useful for determining the expected heat ...

  4. Calmar ratio - Wikipedia

    en.wikipedia.org/wiki/Calmar_ratio

    Calmar ratio (or Drawdown ratio) is a performance measurement used to evaluate Commodity Trading Advisors and hedge funds. It was created by Terry W. Young and first published in 1991 in the trade journal Futures .

  5. 3 steps to calculate your debt-to-income ratio - AOL

    www.aol.com/finance/3-steps-calculate-debt...

    Your debt-to-income ratio (DTI) is your total monthly debt payments divided by your total gross monthly income. It helps lenders determine your approval odds and the likelihood of you being able ...

  6. Talk:Turndown ratio - Wikipedia

    en.wikipedia.org/wiki/Talk:Turndown_ratio

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  7. Duty cycle - Wikipedia

    en.wikipedia.org/wiki/Duty_cycle

    Mark-space ratio, or mark-to-space ratio, is another term for the same concept, to describe the temporal relationship between two alternating periods of a waveform. However, whereas the duty cycle relates the duration of one period to the duration of the entire cycle, the mark-space ratio relates the durations of the two individual periods: [ 13 ]

  8. Chiller - Wikipedia

    en.wikipedia.org/wiki/Chiller

    A liquid (glycol based) chiller with an air cooled condenser on the rooftop of a medium size commercial building. In air conditioning systems, chilled coolant, usually chilled water mixed with ethylene glycol, from a chiller in an air conditioning or cooling plant is typically distributed to heat exchangers, or coils, in air handlers or other types of terminal devices which cool the air in ...

  9. Mayo–Lewis equation - Wikipedia

    en.wikipedia.org/wiki/Mayo–Lewis_equation

    The reactivity ratio for each propagating chain end is defined as the ratio of the rate constant for addition of a monomer of the species already at the chain end to ...