Questions tagged [thermal-radiation]

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What are the design trade-offs between Parabolic Dish (Scheffler) and Parabolic Trough (Euro Trough) Solar Concentrators?

Two types of prevalent medium-to-large-scale concentrated solar thermal fields use: Parabolic trough or Parabolic dish Since 1986, hundreds of sites around the world have built arrays of Scheffler ...
Michael Altfield's user avatar
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Thermal cameras - what is the practical significance of NEDT in relation to accuracy?

(Hi, I put this question on the elec eng. stack exchange and someone suggested I move it here. This question has also been edited to make the actual question clearer and fix an error). Using accuracy ...
Shara's user avatar
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Thermography - objects appear hotter than they are

recently I started working with IR thermal camera (Hikvision DS-2TD1217-3/V1) and I have a slight problem. The camera works fine when there are only people in the image, however if I place a hot ...
user29106's user avatar
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Flow of hot gasses around the pipe

I have the following problem: there is a copper pipe getting through a wooden wall. On one side of the wall (hot side), I have elevated temperature which is defined by radiation and convection. On the ...
blackarrow's user avatar
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Blower door DIY test

Since in my area there is no way to do a blower door test for a house, I was thinking to do a DIY blower door test. Here is my test scenario: Preheat the house before testing to have 10 degree ...
Milos Radojevic's user avatar
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Analytical or approximate formula for temperature distribution in a greenhouse

Here is my problem: Imagine an hemicylindrical greenhouse, with length $L >> R$, its radius. So we consider it as a 2D problem. According to the schematic we have the flux of the sun at the $\...
Fefetltl's user avatar
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How much Energy is Radiated by a gray body?

How much energy is radiated by a gray body at an ambient temperature of T Degrees Kelvin, between the wavelengths of w1 and w2 micrometers , if the emissivity of this gray body is 0.6 ? (Note: ...
Derek's user avatar
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Heat Resistance of Melamine Particle Board

I want to make a cheap thermoforming fixture out of melamine particle board so I can form some PETG plastic sheets. The forming temperature ( hence oven temp) for thermoforming PETG is around 300 deg. ...
Janet Fernie's user avatar