The fact is, for CPU, the biggest problem in space is not cold

but how to dissipate the heat. Most novice people heard about space is that the temperature is 3K. That is true, the microwave background radiation is about 3K. However, most people don't understand vacuum is perhaps the best insulator. That's what keeps your coffee warm. There is almost no air, even there is air inside the satellite, there is 0-g meaning that there is no convection. Radiation at CPU working temperature doesn't cool down the CPU effectively. It takes a lot of effort to get ride of the heat from any electronic components. As for Sun light, again, since there is no air, the shield of the satellite gets hot, but the shield doesn't usually directly connect to electronic components, heat won't conduct easily.

(I hate the char limit on title)

所有跟帖： 

• 热量管理并非星载单板机的难点,因其功耗较低(~10瓦),依靠热传导方式即可有效参与卫星整体的系统.热量管理. -大鱼翅- ♂ (0 bytes) () 02/11/2015 postreply 12:04:47

• that's why PowerPC was used instead of i7... -bi-elliptic- ♂ (465 bytes) () 02/11/2015 postreply 13:04:57