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  2. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    Investment costs to purchase, install and replace meters, Recurring costs to read meters and issue bills based on consumption instead of bills based on monthly flat fees. While the cost of purchasing residential meters is low, the total life cycle costs of metering are high. For example, retrofitting flats in large buildings with meters for ...

  3. Utility submeter - Wikipedia

    en.wikipedia.org/wiki/Utility_submeter

    In some cases, the landlord might add the usage cost to the regular rent or lease bill. In other cases, a third party might read, bill, and possibly even collect for the service. Some of these companies also install and maintain meters and reading systems. [citation needed]

  4. Net metering - Wikipedia

    en.wikipedia.org/wiki/Net_metering

    The report also showed the net cost will amount to US$1.1 billion by 2020. [16] Notably, the same report found that solar customers do pay more on their power bills than what it costs the utility to serve them (Table 5, page 10: average 103% of their cost of service across the three major utilities in 2011). [16]

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  6. Smart meter - Wikipedia

    en.wikipedia.org/wiki/Smart_meter

    The term smart meter often refers to an electricity meter, but it also may mean a device measuring natural gas, water or district heating consumption. [1] [2] More generally, a smart meter is an electronic device that records information such as consumption of electric energy, voltage levels, current, and power factor.

  7. Design-to-cost - Wikipedia

    en.wikipedia.org/wiki/Design-to-cost

    In DTC, cost considerations also become part of extended requirements specifications. [ 1 ] In contrast to the closely related target costing , DTC does not mean a product will exactly reach a defined cost, rather, it is about "considering cost as a design parameter in your product development activities". [ 2 ]

  8. Simulation - Wikipedia

    en.wikipedia.org/wiki/Simulation

    Human-in-the-loop simulation of outer space Visualization of a direct numerical simulation model. Historically, simulations used in different fields developed largely independently, but 20th-century studies of systems theory and cybernetics combined with spreading use of computers across all those fields have led to some unification and a more systematic view of the concept.

  9. Darcy–Weisbach equation - Wikipedia

    en.wikipedia.org/wiki/Darcy–Weisbach_equation

    In fluid dynamics, the Darcy–Weisbach equation is an empirical equation that relates the head loss, or pressure loss, due to friction along a given length of pipe to the average velocity of the fluid flow for an incompressible fluid.