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  2. Solar water heating - Wikipedia

    en.wikipedia.org/wiki/Solar_water_heating

    When a solar water heating and hot-water central heating system are used together, solar heat will either be concentrated in a pre-heating tank that feeds into the tank heated by the central heating, or the solar heat exchanger will replace the lower heating element and the upper element will remain to provide for supplemental heat. However ...

  3. Circulator pump - Wikipedia

    en.wikipedia.org/wiki/Circulator_pump

    The traditional hot water recirculation system uses the existing cold water line as return line from the point of use located farthest from the hot water tank back to the hot water tank. The first of two system types has a pump mounted at the hot water heater while a "normally open" thermostatic control valve gets installed at the farthest ...

  4. Solar-powered pump - Wikipedia

    en.wikipedia.org/wiki/Solar-powered_pump

    A PV solar-powered pump system has three main parts - one or more solar panels, a controller, and a pump.The solar panels make up most (up to 80%) of the system's cost. [citation needed] The size of the PV system is directly dependent on the size of the pump, the amount of water that is required, and the solar irradiance available.

  5. Solar controller - Wikipedia

    en.wikipedia.org/wiki/Solar_controller

    A photovoltaic (PV) powered solar controller uses solar electricity produced on-site to run the pump that delivers the solar-heated transfer fluid to the hot water store. One claimed advantage of PV power is that it reduces the overall carbon emissions associated with operating the system since it avoids the need to supply this energy from ...

  6. Heat pump - Wikipedia

    en.wikipedia.org/wiki/Heat_pump

    A solar-assisted heat pump (SAHP) is a machine that combines a heat pump and thermal solar panels and/or PV solar panels in a single integrated system. [27] Typically these two technologies are used separately (or only placing them in parallel) to produce hot water . [ 28 ]

  7. Solar-assisted heat pump - Wikipedia

    en.wikipedia.org/wiki/Solar-assisted_heat_pump

    The operating conditions' optimization of this system is the main challenge, because there are two opposing trends of the performance of the two sub-systems: by way of example, decreasing the evaporation temperature of the working fluid increases the thermal efficiency of the solar panel but decreases the performance of the heat pump, and consequently the COP. [4]

  8. Tankless water heating - Wikipedia

    en.wikipedia.org/wiki/Tankless_water_heating

    On-demand recirculating pumps are activated by push-button or other sensor. A water contacting temperature probe installed at the hot water usage point signals the pump to stop. Single-cycle pumping events only occur when hot water is needed, thereby preventing the energy waste associated with constantly heating water within piping.

  9. Thermosiphon - Wikipedia

    en.wikipedia.org/wiki/Thermosiphon

    There the water is cooled and is ready to be recirculated. The most commonly used heat exchanger is a radiator, where fans actively blow air across an increased surface area to condense the vapour to a liquid. The denser liquid falls, thus recirculating through the system and repeating the process. No pump is required.

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