| 摘要 |
An intermediate pressure port (4) in the helical rotor expander (1) is connected via a branch pipe (18) to a branch point (21) in the feed pipe (11) connecting the boiler (10) to the inlet port (2) for the expander. The branch pipe includes a valve (19) and the flow through this valve to the intermediate pressure port is controlled as a function of a heating system parameter. The expander has an outlet port (4) connected to a condenser (13), which in turn is connected to a boiler via a pump (16). The expander is used to drive an energy-generating device such as an electrical generator.
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