Carbon dioxide liquid energy storage system
By designing a liquid carbon dioxide energy storage system with multi-stage heat exchange and solar heating, the problems of low efficiency and high cost caused by temperature changes in the air energy storage system are solved, and efficient energy storage and release are achieved.
CN119712269APending Publication Date: 2025-03-28HUANENG SONGYUAN THERMAL POWER CO LTD +1
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Patent Information
- Application Number
- CN202411812660.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
In existing air energy storage systems, the specific heat capacity of the air is low, resulting in large temperature changes during compression and expansion, low efficiency and high cost.
Method used
A liquid carbon dioxide energy storage system is designed, including multi-stage heat exchangers, solar heating devices and LNG storage tanks. Through the compression, expansion and heat exchange process of liquid carbon dioxide, energy is efficiently stored and released.
Benefits of technology
It effectively reduces the energy conversion loss of the system, improves the energy conversion efficiency, reduces operating costs, and improves the energy storage density and energy utilization efficiency of the system.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a carbon dioxide liquid energy storage system. An inlet of a refrigeration house is communicated with an outlet of a first storage tank; an inlet of the first compressor communicates with an outlet of the refrigeration house. An inlet of the first heat exchanger communicates with an outlet of the first compressor. An inlet of the first expansion machine communicates with an outlet of the first heat exchanger. An inlet of the gas-liquid separator is communicated with an outlet of the first expansion machine; an inlet of the second storage tank is communicated with a liquid outlet path of the gas-liquid separator; an inlet of the second heat exchanger communicates with an outlet of the second storage tank; an inlet of the second expansion machine communicates with an outlet of the second heat exchanger; an inlet of the third heat exchanger communicates with an outlet of the second expansion machine. The LNG storage tank is communicated with a heat exchange inlet of the fourth heat exchanger; the first solar heat supply device is arranged between the heat exchange inlet of the second heat exchanger and the heat exchange outlet of the second heat exchanger. According to the technical scheme, the problem that in the related technology, the cost of liquid carbon dioxide energy storage is high is effectively solved.
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