29 Dec '13, 10pm

Here's the flow/heat meter using just temperature sensors

Here's the flow/heat meter using just temperature sensors

Heating bills often present unpleasant surprises. Despite your best efforts to economise on heating, they list tidy sums for electricity or gas consumption. In this article we describe a relatively easy way to check these values and monitor your consumption almost continuously. All you need in order to determine how much heat your system delivers is four temperature sensors, a bit of wiring, and a microcontroller. There’s no need to delve into the electrical or hydraulic components of your system or modify any of them. A bit of theory As many readers probably remember from their physics lessons, it’s easy to calculate the amount of heat transferred to a medium such as water. It is given by the product of the temperature change ΔT , the volume V of the medium, and the specific heat capacity C V of the medium. The power P , which is amount of energy transferred per unit time...

Full article: http://circuitcellar.com/editorsblog/microcontroller-base...

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