equation to work out temperature rise please?
I would like to create a transparent chilled micro studio space: this is to photograph insects (which won't move if the temperature is cold so I can take a photo without harming them).
My *basic* idea is 2 cube tanks from plexiglass, one approx 30*30*30cm (the smaller, in which the insect sits) and the larger 50*50*50, 2 tubes between them in a one way system to let air cycle between them, the larger with lots of freezerblocks and an aquarium pump to circulate the cold air through the system.
I'm after a sustainable temperature (for approx 1 hr) of 1-3 degrees C. The sides have to be clear to let light from the flashes through, and there's a special slot in area into which a lens will poke through into the smaller cube.
It's all perfectly doable and would in all honesty be a godsend if I could get it working.
The thing is... I don't have the foggiest idea if it'll be cold enough, ie stay at the 1-3 deg C for an hr with a bunch of freezer blocks and a pump. And before making it it'd be good to know that theoretically it should work.
Before I embark, would anyone knowledgable about such things be able to do a 'back of an envelope' rough guesstimate of whether it's likely to work or to be a miserable failure?