Two-Phase Ejector Engine

I cannot find any technical information on two phase ejectors with mixtures, like water and ammonia, nor its use in heat engines for electric power. I found some info about two phase ejectors used in refrigeration, like Denso, that improves the COP over 50 %. The refrigeration conditions are different from the fluid conditions of a heat engine, like organic Rankine or Stirling in which we can incorporate ejectors to increase efficiency. Compression ratios of 2.5 (CR -pressure out of diffuser/ suction out of evaporator) was observed with a mixture mass ratio of 0.5 (ф suction fluid from evaporator/motive fluid from condenser) and pressure differential ratio of 6 (PR- pressure of motive/pressure in evaporator).

I am proposing 3 bar at exit of turbine, motive pressure of 51 bar, (PR=17), 6kg/s motive mass, 1kg/s suction gas, (ф 1,66) and the ejector capable of pressuring the fluid at outlet of ejector to 10 bar with backpressure of 3 bar ( CR = 3.3).

If we can materialize these conditions, we can design a heat engine with surprising efficiencies.

The turbine extracts work in an adiabatic process, more efficient than the isothermal expansion of the Stirling engine. The wasted heat of condensation of the Rankine is avoided.

These two inefficiencies avoided added to the work of pressuring the gas being due to the kinetic energy of low enthalpy liquid pressurization can increase the overall efficiency over 60%.

The vapor pressure of ammonia over aqua ammonia at ambient 300ºK is 10 bars with a concentration of 95%. Any ammonia over the concentration will be gas (0.999) at 10 bar and 300ªK. (ammonia VP = 1.06bar).

Your comments, corrections and improvements are important.

With your comments and suggestions I can persuade my Government to grant an amount to pursue it with the construction of a prototype. I do not have much to offer, but I promise that if I get any money, the guys that participate have preference in contracting with me in the CAD and CFD analysis, if desire. Other guarantee is that if I end up manufacturing it for commercialization in Africa, I will pay a meeting, somewhere in a paradisiacal place, with all the active contributors.

Your expertise contributions are appreciated, the only way that I have to convince our Ministry to fund it.

I live in Angola, and the Engineering University does not have the conditions to pursue it, but money is available from Oil production.

The idea is to built an 15-20 KW engine, driven by a parabolic solar reflector (3m diameter) for Africa.

Thank you

David