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A wax motor is a linear actuator device that converts thermal energy into mechanical energy by exploiting the phase-change behaviour of waxes. [1] During melting, wax typically expands in volume by 5–20% ( Freund et al. 1982 ).
Torque motor; Tubular linear motor; V. Valve actuator; W. Wax motor; Wig wag (washing machines) This page was last edited on 17 December 2021, at 13:05 ...
The wax thermostatic element was invented in 1934 by Sergius Vernet (1899–1968). [1] Its principal application is in automotive thermostats used in the engine cooling system. The first applications in the plumbing and heating industries were in Sweden (1970) and in Switzerland (1971).
Paraffin wax (or petroleum wax) is a soft colorless solid derived from petroleum, coal, or oil shale that consists of a mixture of hydrocarbon molecules containing between 20 and 40 carbon atoms. It is solid at room temperature and begins to melt above approximately 37 °C (99 °F), [ 2 ] and its boiling point is above 370 °C (698 °F). [ 2 ]
In an electrically actuated wax motor to provide the heat necessary to expand the wax. Many electric motors and dry type power transformers incorporate PTC thermistors in their windings. When used in conjunction with a monitoring relay they provide overtemperature protection to prevent insulation damage.
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The replacement of a manual heating control with a conventional wax motor TRV has been estimated to save at least 280 kilograms (620 lb) of CO 2 per year (in 2011 for a British semi-detached house with 3 bedrooms and gas heating [1]). They are also considerably cost-efficient, using heat only when needed, and can reduce heating bills by up to ...