My friend is here and we are absolutely bored out of our brainswe need fun things to do but there is absolutely no optionswe do not want to stay on the computer all day and were already swimming all morningwe need fun ideas that are not dumbwhat should we do?
What you propose violates all 3 laws of thermodynamics, and is akin to building a perpetual motion machineThe heater works because the sun is a powerful radiator, and you can concentrate that energy to raise temperatureWithout a heat engine (referigerator), you can't move heat from cold ambient to hot ambient Nowyou could make a self-contained solar powered solid-state referigerator, using solar cells, and Peltier heat exchangers, but this is an active device - portable, but activeI've seen plans for these on the internetGoogle: Peltier solar powerThere's alot of hits and some DIY on page 1
