Madshrimps Forum Madness

Madshrimps Forum Madness (https://www.madshrimps.be/vbulletin/)
-   Hardware Overclocking and Case Modding (https://www.madshrimps.be/vbulletin/f10/)
-   -   Wanted: Constant heat source (https://www.madshrimps.be/vbulletin/f10/wanted-constant-heat-source-379/)

beki 16th June 2002 23:56

Wanted: Constant heat source
 
I'm looking for a constant heat source 'cause I want to test some memory heatsinks (alpha, thermaltake and some Brico stuff). Or do u guys know another way of testing these things?

(I have a copper colplate with a thermal sensor in it and I want to put he HS on one side and the heatsource on the other and the lowest T° should show which HS is the best.)

I just want an idea of what to use I don't want to buy it here so don't move this to mad bargains

jmke 17th June 2002 03:21

mini-heat cookplate? ones you can take on a holiday trip.. should do fine no?

beki 17th June 2002 07:44

that's to big, and I think it gives of to much heat for those little HS's

RichBa5tard 17th June 2002 08:25

a small thealight perhaps?

beki 17th June 2002 10:09

could try that but I'm looking for something electrical so you really have a constant source. (T-light changes when there's more wind & stuff)

jmke 17th June 2002 10:41

cookplate has different settings, I'm sure lowest setting comes very close to processor heat output :) (check XP egg baking :) )

fredperry 17th June 2002 11:24

I saw on GoT that someone made a heatsource especially for this purpose, with adjustable watts i think.
Didn't look to hard to make and not expensive
Unfortunately I don't remember the topicname, search would help in this case ;)

Anthroplast 17th June 2002 13:06

hehe funny :)

it's plain simple.

1st how many watts of heat do you want to stun the heatsink with?

lets say 10 watt wich is much for some mem.

what we need: a 10 watt resistor, a psu or 12v source

lets calculate the resistance we need.

P=U*I
(power = voltage * Current )

now we put in the numbers

10=12*I

=> I = 10/12 or 0,833333 Amp

now that we have found I we can use Ohm's law

R= U/I

R = 12/0,83 => 14,5 Ohm

now head over to your local electronics shop and ask for a 10 watt resistor with nearest value to 14,5 ohm apply some thermal grease and you can start measuring.



===

another how-to: calculating thermal resistance of a heatsink
example: 5k/w wich means temps rise 5 Kelvin per watt heat applied.

a temp rise is called : Delta T
a rise of 1 Kelvin = a rise of 1 °c to keep it simple

now with above 10 watt heater, you can measure temps

lets say ambient temp = 20°c
heatsink temp with 10watts heat applied = 40°c

so delta T = 40-20 = 20°C

now we can calculate

delta T / wattage = thermal resistance

=> 20/10
=> 2°C/watt

the lower this number the better

hope you can understand it :D
Will make website soon with pics'n stuff to brighten things up :P

beki 17th June 2002 13:20

That's what I needed thx

jmke 17th June 2002 14:22

Quote:

Originally posted by Anthroplast

Will make website soon with pics'n stuff to brighten things up :P

feel free to submit any content to /me mail address and I'll make it into a howto on the madshrimps site! :ws: :super:


All times are GMT +1. The time now is 11:06.

Powered by vBulletin® - Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO