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The substantiation of your thermal resistance estimation is (as for any empirical formula) not obvious at first sight. My thermodynamics text book says in the summary of the heat transfer chapter that the usual achievable range for convection is 8 - 15 W/(m?K). So if you use 1 mW/(cm?K) as a linear coefficient, you should be in the ball park. Yo
I have seen lots of tutorials on the web about coolers with incandescent lamps in as a thermal heater.... how can i calculate the minimum power requirement in watts for x volume incubator to reach/maintaing a y there a formula ? solution ? a rule ?
Friends DS18S20 with my application would be a question? I share this code, the internal oscillator frequency of 1 MHz at 4 MHz, but I want to work out hard as a highly value = 32.765. I can not make that calculation formula. I've tried so hard to fix but could not find any solution .. Could you explain this to me if you have an idea? Thank you
MARWEN The effective value is also called the RMS value of waveform. This is what is needed to heat a linear ( and not reactive ) load. Note that Ueff -> ( U^2 ) is linearly proportional to Ueff/R -> ( (U/R)^2 ) wich is the formula of power consumption of resistive load. +++
Think of power dissipation as the power "consumed" by a load. A resistive load converts the power to heat over time. An ideal power supply delivers current at a certain voltage, but it does not dissipate any power
hai friends, i am in a experiment,my aim is find out steady state temperature without doing experiment, consider iam passing a current of 1A to a heater wire(5 ohms), temperature of the wire should be increasing with time as per the heat generation formula q= i2rt, but due to convective heat transfer(open space) q=kA (...)
No, the dissipated power will be the same. From the formula for power: P=U.I , where U=24-5=19V in both cases, current is the same in both cases => P(power) will be the same. If you want to eliminate heat, try using step-down(buck) converter, for example LM2576.
Or maybe a different casing .... bigger casings will help dissipate or conduct more heat to the outside I guess.
Dear Experts, My friend is looking for a formula to calculate heat Dissipation in Main Switchboard. Pls kindly share and explain the calculation if you know. He said he doesn't want to use IEC 890...!!! Thanks. BEst Regards,Edin