F - Mech Eng,Light,Heat,Weapons – 24 – H
Patent
F - Mech Eng,Light,Heat,Weapons
24
H
F24H 9/00 (2006.01) F24H 9/20 (2006.01) G05D 23/19 (2006.01)
Patent
CA 2651443
A system for changing the temperature (T1) of a fluid such as an on-demand water heater is disclosed. The system comprises an input for receiving the fluid at a first temperature (T1) and an output for delivering the fluid at a second temperature (T2). A conduit connects the input to the output, and comprising means such as a heating element for altering the temperature. The system has one or more virtual sensors for estimating the fluid temperature within the conduit. The system comprises a processor having a temperature estimating program for estimating temperature based on an estimate of the heat transfer between the fluid and the conduit. The processor provides a controller with the estimated temperature. The controller subsequently generates a control signal for the temperature altering means. The system thus provides accurate fluid temperature control without suffering from the slow responsiveness that usually mars sensor-based systems.
Palmer Tim
Winter Paul
Borden Ladner Gervais Llp
Nestec S.a.
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