The spacecraft is for Jamaica Sugar daddy experience. Why is he always wearing a “yellow robe”?
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If students are interested in the aerospace field, they will find such an interesting thing: no matter which country launches the spacecraft, Such as natural satellites, detectors or space stations, etc., are all covered with a layer of yellow cover, just like a coat made of gold.
Why do these spacecrafts wear “yellow robes”? Could it be that everyone wants to show the noble elements of the returning spacecraft by “wearing a yellow robe”?
Tianwen-1 Mars Probe (Source: Zhihu)
Little common sense: In the Later Zhou Dynasty, Song Taizu Zhao Kuangyin initiated Chen Qiao’s rebellion, and was dressed in yellow by his subordinates. From then on, he began to call himself emperor and conquer the world. This is the allusion of “yellow robe and body”.
Due to the high cost of launch, the weight of every piece of equipment installed on the spacecraft is specially calculated by scientists. Therefore, this yellow robe is certainly not a decoration.! They are mainly used to control the temperature and prevent spacecraft instruments from malfunctioning due to the temperature being too high or too low Jamaica Sugar Daddy. It is one of the important protective equipment to ensure that the spacecraft can operate normally.
So, what is the working principle of these gold jackets to control temperature? Let’s keep reading!
Jamaica Sugar Why is it necessary to control the body temperature of the spacecraft?
To understand this problem, we need to first understand the three important ways of heat transfer: heat conduction, heat convection and heat radiation.
When two solids with different temperatures come into contact with each other, they can exchange heat with each other through the movement of internal molecules, atoms or electrons, that is, thermal conduction; and for those with different temperatures Jamaica Sugar temperature liquid or gas, when they contact each other, can complete the transfer of heat through the changing position of the fluid, that is, heat convection; in addition, any Objects with a temperature higher than absolute zero emit electromagnetic waves carrying a certain amount of heat to their surroundings all the time, that is, thermal radiation.
Three methods of heat transfer (Source: Sina)
To understand this problem, we need to first understand the three important ways of heat transfer: HeatJamaica Sugar Daddyconduction, heat convectionJamaica Sugarflow, and heat radiation.
When two solids with different temperatures come into contact with each other, they can exchange heat with each other through the movement of internal molecules, atoms or electrons, that is, heat conduction; and for liquids or gases with different temperatures Jamaicans EscortBody, when they are in contact with each other, they can complete the transfer of heat through the changing position of the fluid, that is, thermal convection.
In addition, any object with a temperature higher than absolute zero is emitting electromagnetic waves carrying a certain amount of heat to the surroundings all the time., that is, thermal radiation.
One of the spacecraft body temperature control methods: automatic control
Active temperature control, as the name implies, is a defensive temperature control method. Just like a tank is equipped with thick bulletproof armor, a spacecraft also needs to be equipped with a layer of “heat-proof armor” that can effectively resist thermal radiation. The yellow robe worn by the spacecraft is a type of thermal protective armor, whose scientific name is “multi-layer thermal insulation material”.
Multi-layer insulation material is like a thick blanket, mainly composed of two parts Jamaicans Sugardaddy: Reflective screen (surface layer ) and distance object (inner layer).
The surface reflective screen can effectively reflect cosmic radiation, mainly solar radiation, back, just like a rebound cloak; while the inner reflective screen can prevent heat from outside the spacecraft JM EscortsThe amount of water is easily released into the vacuum, thus playing the role of heat preservation.
A commonly used heat insulation material for reflective screens is polyester film or polyimide film coated with metal foil (such as gold foil, copper foil, etc.), which is the golden coat we see ( Sometimes it’s also silver)! The distance objects are generally loose and porous materials, such as glass fiber, Jamaicans Sugardaddy quartz fiber, etc., which can further hinder the spacecraft and The conditions surrounding the vacuum create excessive heat exchange.
In addition to multi-layer insulation materials, heat pipes installed inside the spacecraft are also a very common method of active temperature control. The working fluid (such as ammonia) stored inside the heat pipe can quickly absorb the heat emitted by the heat source at one end, and then dissipate heat at the other end through heat conduction.Jamaica Sugar Daddy To achieve temperature control inside the spacecraft, the entire process consumes no energy.
Because during the process of heat absorption and heat dissipation, the working fluid inside the heat pipe will change its physical state: first it evaporates from a liquid to a gas, and then condenses from the gas into a liquid, so it is also called a “phase change.” medium”.
In fact, the heat pipe is a very versatile device. It can not only be used for temperature control of spacecraft, but is also indispensable in other engineering fields JM Escortsserver”!
For example, the permafrost layer on the Qinghai-Tibet Plateau increases every yearJM Escortsall experienced the cycle of thawing in winter and melting in summer. This seasonal thawing-melting phenomenon has brought serious foundation subsidence, which is a problem in the construction of Qinghai-Tibet Railway in my country. That’s right. Engineers installed a large number of heat pipes along the railway line to dissipate the heat from the soil to the interior in a timely and efficient manner, thus ensuring that the permafrost layer remains unchanged over the years.
In addition to multiple layers of Jamaica Sugar insulation materials and heat pipes, the spacecraft will also use heat insulators and heat-insulating coatings , automatic heat radiators and many other different automatic temperature control devices.
Jamaica Sugar Daddy Spacecraft body temperature control method two: automatic control
The advantage of automatic temperature control is that it is simple and convenient , does not consume energy; but it also has a more obvious shortcoming, that is, poor accuracy. In order to achieve precise control of the temperature in various areas inside the spacecraft, it is generally necessary to install an automatic temperature control system.
The working principle of this automatic temperature control system is very similar to that of our home air conditioners. Take a commonly used temperature control system called “working fluid circulation loop thermal control system” as an example. It uses a circulation pump as a power source to drive the working fluid to circulate, collect heat at a designated cooling end, and release it at another End releases heat. This system seems to be just an advanced version of a heat pipe, but it can achieve precise temperature control and is an essential part of the spacecraft!
The automatic thermal control system inside the International Space Station (Source: Reference)
My classmates, starting from the discussion of the “yellow robe” worn by the spacecraft, we learned here the knowledge related to the temperature control of the spacecraft. Next time, if you see relevant news on TV, be sure to educate your parents about it!
Editor-in-Chief AJX
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