22nd October 2010 - 02:10 PM
im doing a project and thermodynamics is a major step that i have no experience with it ..say i have a tank that contains about 15K gallon ..so doing a cooling cycle with freon will cost much during time ,, i need a solution with less cost as possible ....
the 2nd problem ..say that i have freezed the water and i have another water tank with same size ..how to apply a heat transfer and is that a good idea
the 3rd problem ..the isolation ..what is the best way .. to prevent heat loss or the surrounding heat
18th January 2011 - 04:03 PM
Freezing much water mean much heat, unavoidably. To go faster, you need much (really much) power, just as unavoidably. Freon is an efficient way of cooling, except that CFC are forbidden now and FC shall be in a near future, so you may have to go to ammonia or hydrocarbons.
A heat transfer needs close proximity (millimetres). One exception are heat pipes, but the external fluids themselves must still be brought close to the ends of the heat pipe.
Freezing a big tank from the outside needs much time because of the radius, and you can't circulate ice.
Could you instead produce snow? The many droplets have a good thermal contact with the freezing gas. Snow cannon. Their efficiency may be poor, to be checked. Compress snow into ice later?
Insulating a big tank is easy. Polystyrene foam, polyurethane foam... If necessary a Dewar, less easy.
24th January 2011 - 09:22 PM
Unavoidably means more heat than cold water. Go faster, you much power, just as unavoidably. Freon cooling is an effective way, except that the CFCs are now refusing to FC would be in a near future, you hydrocarbons.A ammonia or heat transfer may be to close proximity mm needs. Heat pipes are an exception, but still locked himself out of the outer fluid pipe.Freezing heat a large tank should be brought to the ends of the radius because more time is needed, and you can spread ice