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  2. Call logging - Wikipedia

    en.wikipedia.org/wiki/Call_logging

    The goal of the call logging software is to interpret the raw CDR data and produce graphical and summarizing reports. Call logging software packages differ in the sizes of PBX systems that they can support, from hundreds of extensions to hundreds of thousands of extensions. They also differ in the capability of logging specific types of events ...

  3. Trace heating - Wikipedia

    en.wikipedia.org/wiki/Trace_heating

    Electric heat tracing, heat tape or surface heating, is a system used to maintain or raise the temperature of pipes and vessels using heat tracing cables. Trace heating takes the form of an electrical heating element run in physical contact along the length of a pipe.

  4. NTU method - Wikipedia

    en.wikipedia.org/wiki/NTU_Method

    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 ...

  5. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    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 blower).

  6. Logarithmic mean temperature difference - Wikipedia

    en.wikipedia.org/wiki/Logarithmic_mean...

    Logarithmic mean temperature difference. In thermal engineering, the logarithmic mean temperature difference (LMTD) is used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is a logarithmic average of the temperature difference between the hot and cold feeds at each end of ...

  7. Charles S. L. Baker - Wikipedia

    en.wikipedia.org/wiki/Charles_S._L._Baker

    The Friction Heat & Boiler Company was established in 1904, in St. Joseph, with Baker on the board of directors. [2] The company worked up to $136,000 in capital, equal to nearly $4 million in 2018. [3][4]

  8. Kang bed-stove - Wikipedia

    en.wikipedia.org/wiki/Kang_bed-stove

    Kang. bed-stove. The kang (Chinese: 炕; pinyin: kàng; Manchu: nahan, Kazakh: кән) is a traditional heated platform, 2 metres or more long, used for general living, working, entertaining and sleeping in the northern part of China, where the winter climate is cold. It is made of bricks or other forms of fired clay and more recently of ...

  9. Heat number - Wikipedia

    en.wikipedia.org/wiki/Heat_number

    Heat number. An example of a heat number on a plate. A heat number is an identification coupon number that is stamped on a material plate after it is removed from the ladle and rolled at a steel mill. Industry quality standards require materials to be tested at the manufacturer and the results of these tests be submitted through a report, also ...

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