Slug Type Heat Flux Sensor M.Sc (Electronics) DOES-PC
Heat: In physics, “HEAT" is by definition atransfer of energy and is always associatedwith a process of some kind. "Heat" is usedinterchangeably with "heat flow" and "heattransfer". Heat transfer can occur in a variety ofways: by conduction, radiation, convection,net mass transfer, friction or viscosity and bychemical dissipation
Heat Flux: Heat flux or thermal flux is the rate of heat energytransfer through a given surface. The SI derived unit of heatrate is joule per second, or watt. Heat flux is the heat rate per unit area. In SI units,heat flux is measured in [W/m2]. Heat rate is a scalar quantity.
Heat Flux Sensor: A heat flux sensor is a transducer thatgenerates an electrical signal proportional to thetotal heat rate applied to the surface of the sensor.
Working: The majority of heat flux transducers are based as its beginningelement the thermocouple. A thermocouple consists of a bond betweento materials (typically copper and constantan) that behave differentlyto heat. This bond will form an impedance directly proportional to thetemperature. Numerous thermocouples connected in series create athermopile, with the increased number of joints improving the signal. The thermopile (A set of thermocouples arranged formeasuring small quantities of radiant heat)is then embedded in afilling material which should provide a uniform distribution and athermal impedance, at which point it may be considered a transducer.As heat flows from one side of the transducer to the, thermocouplejoints create a voltage differential representing heat flux.
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