Liquid transcritical carbon dioxide energy storage system and method
A liquid carbon dioxide and carbon dioxide technology, which is applied to combined engines, steam engine devices, machines/engines, etc., can solve the problems of low power generation efficiency and energy storage density, insufficient liquefaction of liquid carbon dioxide storage tanks, etc., to improve the power conversion. Efficiency, increased compactness and flexibility, high density effects
Active Publication Date: 2022-04-12
XI AN JIAOTONG UNIV
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Problems solved by technology
[0004] In the existing technology, the transcritical carbon dioxide energy storage technology still has the following problems, such as the low power generation efficiency and energy storage density, the problem of insufficient liquefaction in the liquid carbon dioxide storage tank in the transcritical carbon dioxide energy storage technology, etc.
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[0044] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0045] see figure 1 Schematic diagram of the liquid transcritical carbon dioxide energy storage system. The example adopts two-stage compression, inter-stage cooling, two-stage expansion, and inter-stage reheating.
[0046] Each part of the present invention, equipment connection relation are as follows:
[0047]The outlet of the liquid storage tank 1 is sequentially connected to the first valve 101 , the hot passage of the first heat exchanger 2 , the first compressor 4 , the hot passage of the intercooler 6 , the second compressor 7 , and the inlet of the high-pressure gas storage tank 9 . Among them, the cold channel of the first heat exchanger 2 is connected to the first circulating pump...
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The invention discloses a liquid transcritical carbon dioxide energy storage system and method. The system comprises a liquid storage tank, an evaporation assembly, an energy storage assembly, a high-pressure gas storage tank, an energy release assembly and a condensation assembly. Liquid carbon dioxide is stored in the liquid storage tank, an outlet of the liquid storage tank is connected to an inlet of the high-pressure gas storage tank sequentially through the first valve, the evaporation assembly and the energy storage assembly, and an outlet of the high-pressure gas storage tank is connected to the inlet of the gas storage tank sequentially through the second valve, the energy release assembly and the condensation assembly. The method comprises an energy storage stage and an energy release stage. The system is compact in structure and reasonable in design, heat energy and cold energy are fully utilized, the scale of the storage system can be reduced, the flexibility of the system is improved, and meanwhile various heat sources such as terrestrial heat, solar energy and industrial waste heat can be utilized to enhance the power generation performance of the system.
Description
technical field [0001] The invention belongs to the technical field of compressed carbon dioxide, in particular to a liquid transcritical carbon dioxide energy storage system and method. Background technique [0002] Compressed air energy storage system is a relatively mature energy storage technology that can effectively solve the problem of stable grid-connected operation of wind power generation and solar power generation. Compressed air energy storage technology has experienced traditional compressed air energy storage technology, adiabatic compressed air energy storage technology, liquefied compressed air energy storage technology and supercritical compressed air energy storage system. However, they all have the disadvantages of low efficiency, low energy storage density, and some system parameters are difficult to achieve. [0003] Compared with air, carbon dioxide has good physical properties, such as easy realization of supercritical state (31.1°C, 7.38MPa), low dyn...
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Patent Timeline
Login to View More IPC IPC(8): F01K7/32F01K13/00F01K13/02F01K17/02F01K21/00F01K25/10F01D15/10F01D13/02
Inventor 谢永慧唐勃孙磊张荻
Owner XI AN JIAOTONG UNIV