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9 Threads found on edaboard.com: **Heat Formula**

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

Power Electronics :: 01-19-2017 07:41 :: FvM :: Replies: **20** :: Views: **1064**

I have seen lots of tutorials on the web about coolers with incandescent lamps in as a thermal **heat**er.... 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 ?

Hobby Circuits and Small Projects Problems :: 06-30-2014 00:15 :: yamato96 :: Replies: **2** :: Views: **591**

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

Microcontrollers :: 05-27-2011 22:04 :: vasili35 :: Replies: **1** :: Views: **839**

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.
+++

Microcontrollers :: 05-14-2011 23:48 :: andre_teprom :: Replies: **4** :: Views: **957**

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

Elementary Electronic Questions :: 04-11-2011 16:00 :: Kral :: Replies: **2** :: Views: **9423**

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 **heat**er 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 (...)

Mechanical Engineering and Design :: 11-10-2010 07:36 :: anishnairx10 :: Replies: **1** :: Views: **1874**

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.

Power Electronics :: 06-01-2010 18:44 :: teodor :: Replies: **3** :: Views: **1932**

Or maybe a different casing .... bigger casings will help dissipate or conduct more **heat** to the outside I guess.

Analog Circuit Design :: 05-01-2009 15:16 :: R00KIE :: Replies: **6** :: Views: **2552**

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

Professional Hardware and Electronics Design :: 11-21-2007 17:07 :: edinburgh :: Replies: **2** :: Views: **5979**

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