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Question:

Is it possible to run a heat pump (in reverse) from a source of refrigerant 'steam'?

A bit of detail: I am planning to connect a refrigerant (say R 134-a to a source of Hot water (60+ C) with a heat exchanger so that heat can be transferred. Once the refrigerant is heated (i.e. in its high temperature, high pressure state) I am planning to connect it to a set of gear pumps (or any pump) in 'reverse' (to do the same effect as a turbine) and then that gear pump is to be connected to a stepper motor (such as Fisher Paykel motors) to be 'self-grid' adjusted and successfully generate electricity. I am NOT SURE IF THIS SOUNDS ACTUALLY POSSIBLE OR FEASIBLE AT LEAST. please help (with your expertise) thank you.

Answer:

Congratulations, you just invented the steam engine. Works well with water too, which is safer and cheaper.
But why use the heat pump? There are much more efficient and practical sources of steam. You need to work on stating your ideas more clearly, concisely, and using better sentence structure. Your question is difficult to follow. Connecting this to a gear pump, vane pump, etc, so the steam turns the pump isn't a good idea. The configuration you're trying to come up with is a modified hydroelectric plant, that runs on hot water. This type of system requires high water volume and water pressure, not temperature, to work.

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