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A circulator pump is a specific type of pump used to circulate gases, liquids, or slurries in a closed circuit. They are commonly found circulating water in a hydronic heating or cooling system. Because they only circulate liquid within a closed circuit, they only need to overcome the friction of a piping system (as opposed to lifting a fluid from a point of lower potential energy to a point of higher potential energy). An electrically driven pump (electropump) for waterworks near the Hengsteysee, Germany. ...
A gas is one of the four major phases of matter (after solid and liquid, and followed by plasma, that subsequently appear as a solid material is subjected to increasingly higher temperatures. ...
A liquid will usually assume the shape of its container. ...
A slurry may be: Look up slurry in Wiktionary, the free dictionary. ...
Impact of a drop of water. ...
Name for heating and cooling systems using water as the circulated heat exchange medium. ...
Circulator pumps as used in hydronic systems are usually electrically powered centrifugal pumps. As used in homes, they are often small, sealed, and rated at a fraction of a horsepower, but in commercial applications they range in size up to many horsepower and the electric motor is usually separated from the pump body by some form of mechanical coupling. The sealed units used in home applications often have the motor rotor, pump impeller, and support bearings combined and sealed within the water circuit. This avoids one of the principal challenges faced by the larger, two-part pumps: maintaining a water-tight seal at the point where the pump drive shaft enters the pump body. An electrically driven pump (electropump) for waterworks near the Hengsteysee, Germany. ...
The horsepower (hp) is the name of several non-metric units of power. ...
Rotating magnetic field as a sum of magnetic vectors from 3 phase coils An electric motor converts electrical energy into mechanical energy. ...
A bearing is a device to permit constrained relative motion between two parts, typically rotation or linear movement. ...
Small- to medium-sized circulator pumps are usually supported entirely by the pipe flanges that join them to the rest of the hydronic plumbing. Large pumps are usually pad-mounted. A plumber wrench for working on pipes and fittings Plumbing, from the Latin for lead (plumbum), is the skilled trade of working with pipes, tubing and plumbing fixtures for potable water systems and the drainage of waste. ...
Pumps that are used solely for closed hydronic systems can be made with cast iron components as the water in the loop will either become de-oxygenated or be treated with chemicals to inhibit corrosion. But pumps that have a steady stream of oxygenated, potable water flowing through them must be made of more expensive materials such as bronze. Cast iron usually refers to grey cast iron, but can mean any of a group of iron-based alloys containing more than 2% carbon (alloys with less carbon are carbon steel by definition). ...
General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless (gas) very pale blue (liquid) Atomic mass 15. ...
Corrosion is deterioration of essential properties in a material due to reactions with its surroundings. ...
Drinking water This article focuses on water as we experience it every day. ...
Assorted ancient Bronze castings found as part of a cache, probably intended for recycling. ...
Use with domestic hot water
Bronze pumps are often used to circulate domestic hot water so that a faucet will provide hot water instantly upon demand. In regions where water conservation issues are rising in importance with a rapidly expanding population, and a record economic expansion that has consumers looking for comfort, so-called Energy-saving Hot Water Recirculation (HWR) pumps can aid in water conservation at a relatively small expense in added energy use. In typical one-way plumbing without a circulation pump, water is simply piped from the water heater through the pipes to the tap. Once the tap is shut off, the water remaining in the pipes cools producing the familiar wait for hot water the next time the tap is opened. By adding a circulator pump and constantly circulating a small amount of hot water through the pipes from the heater to the furthest fixture and back to the heater, the water in the pipes is always hot, and no water is wasted during the wait. The tradeoff is the energy wasted in operating the pump and the heat lost from the constantly-hot pipes. Thermal insulation applied to the pipes helps mitigate this second loss and minimize the amount of water that must be pumped to keep hot water constantly available. A trio of propane water heaters. ...
Thermal insulation on the Huygens probe The term thermal insulation can refer to materials used to reduce the rate of heat transfer, or the methods and processes used to reduce heat transfer. ...
The traditional hot water recirculation system uses a dedicated return line from the point of use located farthest from the hot water tank back to the hot water tank. In homes where this return line was not installed the cold water line is used as a return line with a temperature control device closing the connection between the hot and cold lines at a set temperature. Compared to a dedicated return line, using the cold water line as a return has the disadvantage of heating the cold water pipe (and the contained water). Technological advancements within the industry allowed for incorporating timers to limit the operations during specific hours of the day to reduce energy waste by only operating when occupants where likely to use hot water. Additional advancements in technology include pumps which cycle on and off to maintain hot water temperature versus a continuously operating pump which consumes more electrical energy. Utilizing "normally closed" crossover valves have been shown to further reduce energy consumption by preventing undesired siphoning of water from a hot water line during cold water usage which lowers the cold water lines water pressure allowing the higher pressured water in the hot water lines to pass through a "normally open" crossover valve increasing the energy demand on the water heater.
See also A zone valve is a specific type of valve used to control the flow of water or steam in a hydronic heating or cooling system. ...
External links Typical manufacturers of circulator pumps: |
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