Phisics KS3
2006-11-12 01:52:25 · 6 answers · asked by babey 1 in Science & Mathematics ➔ Engineering
The thermostat is a feedback controller. It takes feedback (temperature) and uses that information to decide to turn on the furnace. You call it a negative feedback controller, because if it gets too cold, it turns the furnace on to make it warmer. (A positive feedback controller would turn the furnace on when it got too hot).
2006-11-12 02:02:26 · answer #1 · answered by WildOtter 5 · 0⤊ 0⤋
A thermostat is a device for regulating the temperature of a system so that the system's temperature is maintained near a desired setpoint temperature. The thermostat does this by controlling the flow of heat energy into or out of the system. That is, the thermostat switches heating or cooling devices on or off as needed to maintain the correct temperature.
Thermostats can be constructed in many ways and may use a variety of sensors to measure the temperature. The output of the sensor then controls the heating or cooling apparatus.
The thermostat should be located away from the room's cooling or heating vents or device, yet exposed to general airflow from the room(s) to be regulated. An open hallway may be most appropriate for a single zone system, where living rooms and bedrooms are operated as a single zone. If the hallway may be closed by doors from the regulated spaces then these should be left open when the system is in use. If the thermostat is too close to the source controlled then the system will tend to "short cycle", and numerous starts and stops can be annoying and in some cases shorten equipment life. A multiply zoned system can save considerable energy by regulating individual spaces, allowing unused rooms to vary in temperature by turning off the heating and cooling.
2006-11-12 02:00:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
That's not a physics question. You should ask your heating and cooling repair person. But here's the answers anyway.
Electronics ones have heat or temperarure sensor that turns on/off your heating/cooling system. The older ones used some special metal that expands and contrack and they formed this meal into a coil that has mercury switch on them. Don' believe me? Try and open one up and you'll see what I mean. God enough, no?
2006-11-12 01:59:39 · answer #3 · answered by FILO 6 · 0⤊ 0⤋
the thermostat has a connection point which gets disconnected when the temerature is altered to a greater extent,and when the temperature becomes normal the connection is created b/w the points and the same process takes place again.
that's all i have to say,rest i will tell u after looking into my physics book.
2006-11-12 02:00:42 · answer #4 · answered by juno 2 · 0⤊ 0⤋
There is a mercury tube and/or coiled spring which moves according to temperature. This opens/closes contact points to turn on/off the equipment.
2006-11-12 01:55:13 · answer #5 · answered by Ralph 5 · 0⤊ 0⤋
A thermostat is a switch that turns the furnace on or off.
2006-11-12 01:57:10 · answer #6 · answered by Ralfcoder 7 · 0⤊ 0⤋