Small Systems - HVAC-Talk
... the first cooling stage (compressor #1) when the return air temperature increases to 50% of the band and the second cooling stage (compressor #2) at 100% of the band. The compressors are staged on with hot gas bypass. The controller deactivates the second stage of cooling (compressor #2) when the re ...
... the first cooling stage (compressor #1) when the return air temperature increases to 50% of the band and the second cooling stage (compressor #2) at 100% of the band. The compressors are staged on with hot gas bypass. The controller deactivates the second stage of cooling (compressor #2) when the re ...
Design Document - Curtis Mayberry
... Boost Converter (hardware) - used to step up a voltage to a particular level given an input voltage by switching a transistor and using circuit elements to store energy. Buck Converter (hardware) – A device used to step down a voltage to a particular level given an input voltage by switching a trans ...
... Boost Converter (hardware) - used to step up a voltage to a particular level given an input voltage by switching a transistor and using circuit elements to store energy. Buck Converter (hardware) – A device used to step down a voltage to a particular level given an input voltage by switching a trans ...
ge 400 engineering design project
... new technology, say “I am a grower, not a manager” [3]. Therefore, the user interface must be very simplified and easy to use. Professional growers want some manual operations in addition to automatic manipulations. Moreover, greenhouse production offers a wide variety of plant choices, including th ...
... new technology, say “I am a grower, not a manager” [3]. Therefore, the user interface must be very simplified and easy to use. Professional growers want some manual operations in addition to automatic manipulations. Moreover, greenhouse production offers a wide variety of plant choices, including th ...
Thermostat
A thermostat is a component of a HVAC control system which senses the temperature of a system so that the system's temperature is maintained near a desired setpoint. The thermostat does this by switching heating or cooling devices on or off, or regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature.A thermostat may be a control unit for a heating or cooling system or a component part of or air conditioner. 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. A thermostat may switch on and off at temperatures either side of the setpoint. This prevents equipment damage from frequent switching. Thermostats are also used in many household appliances. A thermostat is an instance of a ""bang-bang controller"" as the heating or cooling system output is not proportional to the difference between actual temperature and the set temperature; the equipment runs at full capacity until the set temperature is reached, then shuts off. Increasing the difference between the thermostat setting and the desired temperature therefore does not shorten the time to achieve the desired temperature.The term is derived from the Greek words θερμός thermos, ""comfortable"" and στατός statos, ""climate controlled"".