Jazz

8

Through A Glass

12.02.2022

Placing the solar panels inside a house or inside a car is a terrible idea from this point of view. Solar panels need to be placed towards the South US case in order to maximize energy yields.

If you are moving in a car there is nothing you can do about it because the orientation will change constantly, so you will simply obtain different power outputs across the day. If you are inside a building or house, you will need to find a window or normal glass that faces South in order to maximize the application of your power output.

Placing a solar panel behind a window or sheets of glass, that is facing North would be equal to not having a solar panel. Second, placing solar panels inside a building or behind a car tinted glass window also has a bad effect. The solar irradiance will be at its maximum value when the Sun is in its highest position, meaning midday. The only production at this moment will be from DHI. Solar irradiance is generally described as the combination of two types of irradiance.

On one hand, Direct Normal Irradiance DNIrelated to the incident sunlight that impacts in a perpendicular angle directly to the solar panel without reflection, refraction, or loss of any kind. On the other hand, there is the Diffuse Horizontal Irradiance DHIassociated with all of that solar radiation, that is reflected or refracted by the atmosphere, clouds, mountains, lakes, or the ground. This component is referred to as the solar irradiance that indirectly impacts the surface of the solar panel.

By placing a solar panel behind a glass window, or safety glass, you are eliminating the DNI component of solar radiation that would directly impact the solar panel. Meaning that, your solar panel would be working mostly with DHI components, related to the reflection of sunlight from other sources. Another disadvantage of placing solar panels behind a window is that shadings created by frames or bars of the window will also reduce the power output and its power conversion efficiency.

Moreover, you might think to park your car under the Sun and leave your solar panel technology inside to obtain maximum energy yields. However, as heat concentrates inside your car without air conditioning, the solar panel will get hotter due to the generation of electricity and the hot temperature conditions inside the car. This will induce thermal losses and could even damage the solar cells if the heat is too intense. Therefore, it is not the best idea.

Therefore, it is worth it to purchase solar panels but it is not recommended to place the solar panels behind glass. You can take a look at a solar fan video here to check the losses in the performance of a small solar panel located behind a window.

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ISSN : The C and O atoms in CO carbon monoxide are jiggling and do produce infrared light. Why the difference? For jiggling atoms to generate light that jiggling motion must set up an oscillating electric field in the molecule. Remember, light is an electromagnetic wave. Because, CO is a polar molecule has a positive end Through A Glass a negative endthe stretching of the CO bond produced an oscillating electric field that generates an electromagnetic wave. Not all the jiggling motions of atoms in CO2 produce infrared light.

They all transfer heat energy. As I said, infrared radiation is light, not heat. Can infrared toaster ovens cause any damage to the eye or skin if observed closely? I see articles about infrared and microwave cooking breaking down DNA in milk, etc.

How true is that as well? Keep in mind that infrared and microwave cooking devices are designed to cook things. If you get so close that you are within their sphere of cooking operation, you are going to cook your eyes or skin. My guess is that if you use these devices as directed by the manufacturer, they are safe.

When things cook, their DNA breaks down. The infrared and microwave radiation in itself is non-ionizing like X-raysbut the heat produced could be dangerous. Just use common sense when using them. Can we say that Glass, Water vapour and Carbon dioxide can pass heat emissions from illuminated sources but trap or absorb them if coming from non-illuminated sources?

Not sure I understand the question i. Glass passes electromagnetic radiation light over a range of specific wavelengths e. Water vapor and carbon dioxide do the same thing but to a more limited extent. The wavelengths of electromagnetic radiation emitted from sources particularly solids depends on the temperature of the source.

For example, the temperature of sun results in its emitting a great deal of radiation at wavelengths of visible light. Glass does not absorb visible light. The temperature of Through A Glass Earth results in its emitting mainly radiation at wavelengths of infrared radiation.

Glass generally absorbs infrared radiation not letting it pass through. Infrared light will only produce heat if it strikes matter and the matter absorbs it. Excuse me but I am getting confused. If near infrared can pass through glass but far infrared cannot, is this the greenhouse effect? Specifically, I am thinking about how reptiles keep warm. That is what a physicist told me but I cannot find a reference for it personally. Secondly, when an infrared camera or heat sensor in a snake detects infrared with the hot areas appearing red and the even hotter things appearing white; how do you explain how an infrared camera views these differences if in fact far infrared is blocked by glass?

Fourthly, how come Through A Glass materials block certain infrared wavelengths? Is it because they are arranged in such a way that mirrors and therefore blocks certain infrared wavelengths? I have been wondering about these questions for a while now, hope you can help! The difference between near-IR and far-IR is wavelength. The glass itself will get warm. Any gas in a glass bottle will warm, not because of absorbing the infrared light, but because gases move around and bump into the warm glass.

Other wavelengths of electromagnetic radiation x-rays, ultraviolet, visible, microwave, radio waves, and even some infrared can pass through the glass. As you pointed out in an earlier post, it is important to keep in mind that IR is not heat, it is electromagnetic radiation.

It only generates heat when it is absorbed by a solid or a gas that is opaque to IR. X-rays and Through A Glass UV rays heat the thin gasses in the upper thermosphere. Visible light, UV and IR heat the surface. All electromagnetic radiation can heat matter, not just IR. What you write is essentially correct, as illustrated with a microwave oven. When it comes to glass, the glass absorbs a wide band of IR wavelengths keeping the IR from passing through. This is why in an infrared Through A Glass, the cells holding samples have windows made of polished sodium chloride and not glass.

I wonder what this means for two famous experiments concerning heating of atmospheric gases inside two glass cylinders.

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