Cryogenic energy storage system for a combined heat and power plant

By optimizing the equipment connections of the liquid air energy storage system, the cogeneration unit can start and stop peak shaving without shutting down, solving the problem of high equipment modification costs in existing technologies and realizing flexible start-stop peak shaving and heating functions.

CN224479711UActive Publication Date: 2026-07-10HEBEI CONSTR INVESTMENT ENERGY STORAGE TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HEBEI CONSTR INVESTMENT ENERGY STORAGE TECH CO LTD
Filing Date
2025-08-20
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing technologies, when combined heat and power units are equipped with liquid air energy storage, it is difficult to achieve start-stop and peak-shaving functions without shutting down the unit, and the initial investment is relatively large.

Method used

Design a start-up and peak-shaving system for a combined heat and power (CHP) unit based on liquid air energy storage, including a coal-fired power generation unit, a liquid air energy storage unit, and a residential heating unit. By optimizing the equipment connection and configuration, the system utilizes the heating steam extraction provided by the coal-fired power generation unit and the equipment connection of the energy storage unit. The high-voltage equipment of the liquid energy storage unit is connected to the power generation end of the coal-fired power unit. The residential heating unit is connected to both the liquid air energy storage unit and the coal-fired power generation unit, thereby realizing the conversion of electrical energy into heat storage and heating.

Benefits of technology

It enables external start-stop and peak-shaving functions without shutting down the system, reducing initial investment, taking into account the heating needs of the people, and ensuring the safety and flexibility of the system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of based on liquid air energy storage's cogeneration unit start-stop peak shaving system, including the coal-fired generating unit for producing electric energy, the electric energy of the coal-fired generating unit for consumption is changed into heat and liquid air storage unit and the civil heating unit for carrying out external heating using the heating extraction steam provided by the coal-fired generating unit and the surplus compressed heat provided by liquid air energy storage unit, the high-pressure equipment of liquid air energy storage unit is connected at the power generation end of the coal-fired generating unit, and the civil heating unit is connected with liquid air energy storage unit and the coal-fired generating unit respectively.The utility model is based on guaranteeing the maximum heating load of external network of cogeneration unit, to configure minimum capacity liquid air energy storage system to realize start-stop peak shaving, both can guarantee heating, and can realize start-stop peak shaving function, simultaneously with minimum capacity configuration, reduce system redundancy, reduce initial investment.
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