I've had this idea in my head for a refrigeration cycle which is powered by heat, uses only one fluid, and whose only moving part is the fluid.
I would like to know if my idea is new, or if it's something which was tried and abandoned.
I'll describe my idea in terms of water and steam, but other fluids would likly work just as well.
The system starts with the boiler, where external heat is added, to turn the water passing through into steam.
Some of the steam from the boiler is used to power an old fashioned "steam injector" which is to pump water into the boiler.
The rest of the steam from the boiler is used as the motive fluid for an aspirator (one of two).
The condenser receives steam from the steam powered aspirator, rejects waste heat into the envionment, and turns steam into water.
Some of the water from the condenser is injected into the boiler, the remainder is used as the motive fluid for our second aspirator.
The water powered aspirator sucks in cold steam from the evaporator, and spits it into a gas/liquid separator.
Water from the separator passes through an orifice tube into the evaporator; steam from the separator is sucked out by the steam powered aspirator and discharged into the condenser.
If my idea is in fact new... I would love to know if any thinks it would work, and how it's efficiency might compare with a typical absorption system.
I'm not mechanically inclined, and have no means of testing this myself.