Search results

  1. I

    Is a refrigeration laser thermodynamically possible?

    Never forget that Overall head transfer = Overall heat transfer coefficient * Area * (Temperature of hot surface - Temperature of cool surface). That is, Qdot=UA(deltaT). So, with the sun radiating into space's 4 Kelvin heat sink it is working at max heat transfer rate for the surface area...
  2. I

    Is a refrigeration laser thermodynamically possible?

    Having written the preceding, there are two lasers at work in the scenario. The first is the refrigeration laser that cools the inward-facing shell. The second is the communication laser transmitting to space. Okay, so what is going on here is that we have outward thrust supplied by the...
  3. I

    Is a refrigeration laser thermodynamically possible?

    Taking the argument to extreme, we are talking about covering an area of the sun and dumping the heat flux across that area to a heat sink of nearly absolute zero temperature. That is what the sun is already doing and it retains its high 'surface' temperature anyway. If we take the...
Top