All Questions
Tagged with electrical-engineering heat-transfer
24
questions
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Battery thermal loss
A copper bus bar is subject to a short circuit current of 500 A for 10 s. The section of the bus bar, through which the current flows, has a length L = 50 mm and a cross section of A = 20 mm^2. ...
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Advice needed on how to cool 50 ml liquid from 60 °C to 30 °C
In Short: I'm working on a project where we need to cool 50 ml of liquid from 60 °C to 30 °C or 20 °C. The liquid will be in a 150 ml copper container with an open top.
Due to the lack of skills in ...
- 3
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1
answer
111
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Cooling capacity of sealed aluminum electronics enclosure
I need to design a sealed electronics enclosure that also functions as a heat sink. The main component I need to cool generates max 15W. This component will directly contact the walls. The remaining ...
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Does wiring heat elements in parallel vs series at the same power affects the results?
I am designing an electric kiln just for fun and I found myself not knowing how to answer this scenarios.
The main constant is power. The final power must be the same in each case. My question is ...
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2
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273
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Heat transfer: does the heat generated in a cable get transferred to the electrical components?
I have a 1000 V, 50 sq mm, double insulated (XLPE) copper conductor cable. This cable is being connected to a power electronic component.
The current flowing through it is 230 Amps DC. The cable ...
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110
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Equivalent Resistance Between Two Points in a Wye Network
I am interested in learning how to calculate the equivalent resistance between two points in a wye circuit for application to thermal networks (i.e. I'd like to calculate the equivalent thermal ...
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3
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2
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Do all thermoelectric generators (TEG) require two distinct metals?
Most thermocouples that I've seen being sold online consist of two separate metal wires connected at junctions. Many smaller thermoelectric generators consist of a combination of iron and copper or ...
- 105
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How much water do steam turbines consume per kWh of electricity generated?
I know this depends on some factors, and I can only think of these: the inlet steam's temperature and pressure. If there are more factors then please do tell me.
What is the maximum figure in liters ...
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61
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Can't tesla turbine work on air heated by solar concentration? [closed]
If we heat air along a pipe that's tilted at 30° to the horizontal using parabolic troughs, the air should rise upwards (I'm not sure how fast or powerfully) and then connect the outlet at the top ...
- 98
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1
answer
43
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Melt plastic powder bed with radiant heat?
I want to melt a bed of plastic powder so that the powder bed once melted and then cooled forms a solid sheet of plastic.
In order to melt the powder I'm thinking of passing a nichrome (Ni80/Cr20) ...
- 159
4
votes
2
answers
133
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What are these outdoors "mystery boxes" for in the USA?
While watching random videos shot in the USA (in the present time), I've noticed these little weird outdoors boxes:
What is the purpose of these? They look like they might be related to ventilation ...
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answer
184
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How do I determine the temperature inside a transformer vault?
I am trying to determine the temperature of an underground concrete vault buried 10m underground. The vault has the following dimensions: 2640mm x 5995mm x 2640mm with a wall thickness of 250mm. The ...
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3
votes
2
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235
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The concept of flux
I find it difficult to understand the concept of flux and field.I have searched the internet and refered a few books.From what I understand, generally flux can be defined as "some quantity per unit of ...
user17332
1
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2
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158
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Governing emissivity
I am trying to design a heat source for use with testing the functionality of an infrared thermometer. I am happy with my circuit, I have a surface heated to a nice, constant 50°C (as constantly ...
- 111
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Peltier effect Asymmetrical perforance
When current is injected into a Peltier device/thermo-electric cooler, it heats up, when the current is reversed, it cools down. Why does it takes less time to heat up than to cool down?
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