Island operation of a turbo expander
JP2025517955A5Pending Publication Date: 2026-05-29SAPPHIRE TECHNOLOGIES INC
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- SAPPHIRE TECHNOLOGIES INC
- Filing Date
- 2023-05-25
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
Existing gas transportation systems, particularly those using high-pressure pipelines, face inefficiencies in energy recovery from pressure drops, leading to wasted energy and increased CO2 emissions.
Method used
The integration of a turboexpander generator system within the gas transportation infrastructure, which captures the energy from pressure drops to generate electricity, and utilizes power electronics to convert and manage the electrical output for grid integration or local use.
Benefits of technology
This solution effectively recovers waste energy from pressure drops, reducing energy losses and CO2 emissions, while generating additional electricity that can be used to power compressors or fed back into the grid.
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Smart Images
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Abstract
The turbo expander can operate as a microgrid generator for islanding operation. The turbo expander can recover the energy lost during the pressure drop sequence to generate electricity. The pressurized process gas can rotate the turbine, thereby rotating the rotor within the stator of the turbo expander. The power electronics can include an islanding mode inverter for outputting an alternating current having a frequency and amplitude suitable for feeding power to the load. The power electronics can include a battery that is charged by the turbo expander and can supply power to start the turbo expander. The power electric can include a bidirectional inverter that sends surplus power from the turbo expander to the power grid and receives power from the power grid for starting.
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