Question

why can t we cool room by opening fridge

Answer 1

I understand that cold is the absence of heat energy, and is to heat as a vacuum is to matter. But we can create a vacuum in a chamber. And I can quickly drain the energy out of a battery by shorting it. And I’m not saying I want a machine that destroys the heat energy, just one that transfers it into some other receptacle object, or that converts it to another form, like light or radio waves, that could safely be sent into a room. My “invention” is an object approximately the size of a microwave oven that only has to be turned on as needed (unlike a refrigerator) and in a minute or so can turn a glass of water into ice by quickly draining its heat energy. As a green bonus, I would add a converter to the back end that would take the removed heat and convert it into something useful, like electricity or light. (I know some energy would be lost in the process, that it can’t be 100% efficient.) Is this science fiction or just something we don’t know how to do yet?