I believe this is how the "electrolux cycle" works in those heat-powered refrigerators (like many bar friges and fuel powered friges for mobile homes). The problem with usig it in a turbine would be the extreemly abrasive nature of water droplets in the vapour (ammonia). If you could "scrub" dry the ammonia vapour good enough, maybe: otherwise you could use a modified hydrolic ram or use a piston like the old steam engines to extract the energy released when condencing the boiling ammonia in the water.