Anyone who has used a laptop atop a lap is intimately familiar with the heat that a modern CPU can generate. Every watt of that heat is wasted.
Talking with Dave earlier, he mentioned that he had converted one of his PCs to liquid cooling, silencing at least some of the fans that had made the thing sound like a damned airplane. He explained how the cooling system used an aquarium pump to circulate water; I hypothesized that the pump was probably redundant–the CPU itself probably put enough energy into the system for natural convection to circulate the water adequately, as long as there’s a one-way valve in the plumbing somewhere. He was skeptical.
Anyhow, if it hasn’t been done already, it would make a good project for a casemodder. But after thinking about it a bit, I realized this idea had a lot of potential. Take it a step further: rather than using energy to cool the system, actively scavenge the processor’s waste heat. I can imagine a couple ways to do this:
- Install a water turbine in the radiator. This could drive a generator to produce a little juice, or be mechanically coupled to a fan. This would be quite elegant: the computer would become a homeostatic system that cooled itself down as a natural consequence of heating up.
- Install a stirling engine in the case. Again, this could be coupled to a fan or a generator.
Imagine the steampunk/geek-cred you’d earn by having a functioning stirling engine installed in your case.