An air open Brayton cycle power system fueled by ammonia

By using liquid ammonia precooling and cascade waste heat recovery technology, the problems of low efficiency and poor ammonia combustion stability in traditional fossil fuel systems have been solved, achieving zero-carbon, high-efficiency open-loop Brayton cycle energy supply and improving the system's thermal efficiency and combustion stability.

CN122106702APending Publication Date: 2026-05-29HENGSHUI NEW CHEM ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENGSHUI NEW CHEM ENERGY TECH CO LTD
Filing Date
2026-04-07
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional fossil fuel Brayton cycle systems have low power generation efficiency, high carbon and pollutant emissions, and low waste heat utilization. When ammonia is directly applied to an open-air Brayton cycle system, combustion stability is poor.

Method used

Using liquid ammonia as both an air precooler and fuel, combined with the cascade waste heat recovery of a high-low temperature heat exchanger, the latent heat of liquid ammonia vaporization is used to precool the intake air and then the ammonia is ignited by the high temperature of the turbine exhaust, achieving stable combustion without the need for a catalytic converter.

Benefits of technology

It achieves zero-carbon, high-efficiency energy supply for the air-operated Brayton cycle system, significantly reduces compression power consumption, improves system thermal efficiency, and features both zero carbon emissions and a compact structure.

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Abstract

The application discloses an air open Brayton cycle energy supply system using ammonia as fuel, which comprises a precooler, a low-temperature heat exchanger, a combustion chamber, a high-temperature heat exchanger, a generator, a compressor and a turbine. Liquid ammonia is pre-cooled in the precooler to form a gas-liquid mixture, and then is gasified into ammonia gas through the low-temperature heat exchanger; compressed air is heated in the high-temperature heat exchanger, and then is expanded in the turbine to drive the compressor and the generator; the turbine exhaust gas is mixed with ammonia gas in the combustion chamber, and the high-temperature exhaust gas is recovered through cascade heat exchange to realize zero-carbon and high-efficiency energy supply. The application realizes zero-carbon and high-efficiency energy supply through the combination of the dual roles of liquid ammonia and cascade waste heat recovery, pre-cools air by using the latent heat of liquid ammonia vaporization to reduce the compression power consumption, and solves the difficulty of ammonia gas combustion at room temperature through double heat exchange; the high-temperature turbine exhaust gas ignites ammonia gas without catalysis, the heat efficiency is improved through cascade utilization of the high-temperature and low-temperature heat exchangers, and the application has the characteristics of zero-carbon emission, compact structure and significant improvement of energy efficiency.
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