Organic rankine cycle system
AssigneeCyclect Electrical Engineering Pte Ltd
InventorHideharu Yanagi
Life of this patent
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Abstract
The application discloses an organic Rankine Cycle system with a generating unit, a condenser for condensing an organic work fluid, a feeder pump for circulating the organic work fluid and an evaporator (14) for evaporating the organic work fluid. The generating unit comprises a high-pressure screw expander and a low-pressure screw expander, which are connected in series, wherein the high-pressure screw expander and the low-pressure screw expander are mechanically connectable to a generator, which is provided between the high-pressure screw expander and the low-pressure screw expander. The ORC system comprises a by-pass line for bypassing the high-pressure screw expander. The bypass line comprises a control valve for opening and closing the by-pass line.
Claims16
An Organic Rankine Cycle system with
- a generating unit,
- a condenser for condensing an organic work fluid,
- a feeder pump for circulating the organic work fluid,
- an evaporator for evaporating the organic work fluid,
- wherein the generating unit comprises
- a high-pressure screw expander and a low-pressure screw expander which are connected in series, wherein the high-pressure screw expander and the low-pressure screw expander are mechanically connectable to a generator which is provided between the high-pressure screw expander and the low-pressure screw expander, and wherein
- the Organic Rankine Cycle system further comprises a by-pass line for bypassing the high-pressure screw expander, wherein the bypass line comprises a control valve for opening and closing the by-pass line.
A method for operating an ORC system with a high-pressure expander and a low-pressure expander, the ORC system comprising a bypass line, wherein the bypass line extends from a branching point before the high-pressure expander to the low-pressure expander, and the ORC system comprises an input control valve before the high-pressure expander,
- the method comprising in a high temperature operating mode:
- closing the bypass line and opening the input control valve, and, in a low temperature operating mode,
- opening the bypass line and closing the input control valve.
Dependencies are inferred from the claim text.