A single-valve expander system and method for isothermal expansion

An isothermal expansion and expander technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as affecting the normal operation of the machine, increasing costs, and frosting on the exhaust holes, and achieves an increase in the output power per unit of working fluid. The effect of improving work efficiency and reducing the number of expansion stages
CN104358593BActive Publication Date: 2017-01-04华科超能(北京)能源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
华科超能(北京)能源科技有限公司
Publication Date
2017-01-04

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Abstract

The invention relates to a single-valve expander system and method for isothermal expansion, which can be applied to small / miniature compressed air energy storage systems or other power systems, and realize quasi-isothermal expansion by spraying mist or foam medium into the gas in the expansion process process, thereby increasing the output power per unit of working fluid and improving the overall efficiency of the system. The specific method is that the top of the cylinder is equipped with an intake valve and an annular injector, the intake valve communicates with an external high-pressure gas working medium source, and the annular injector communicates with an external heating medium source system, during the working process of the expander , the heated heating medium is atomized or foamed and injected into the cylinder at a certain mass flow rate. Compared with the traditional single-valve expander, the present invention can make the expansion process obviously deviate from the adiabatic process, obtain a "quasi-isothermal expansion" process close to isothermal, and improve the output power per unit of working fluid and the working efficiency of the expander.
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Description

Technical field

[0001] The invention relates to a single valve expander system and method applicable to isothermal expansion of small / micro compressed air energy storage systems or other power systems. The expander can spray mist or foamy liquid into the gas during expansion Realize the quasi-isothermal expansion process, so as to realize the isothermal energy release, increase the output of the unit expansion working fluid, and improve the overall efficiency of the system. Background technique

[0002] Expanders are widely used in various power output systems, such as steam power cycles, gas turbines, organic Rankine cycles, compressed air energy storage systems, etc. Isothermal expanders can obtain greater power output and higher system efficiency, and are increasingly attracting attention. The research field has initially involved isothermal diesel engines, isothermal compressed air energy storage systems, and piston compressor water injection evaporative internal cooling proc...

Claims

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