Half-closed constant-pressure internal combustion thermodynamic cycle method and half-closed constant-pressure internal combustion thermodynamic cycle system for prime mover

Abstract

The invention provides a half-closing constant pressure internal combustion thermodynamic cycle method and a half-closed constant-pressure internal combustion thermodynamic cycle system for a prime mover. A cycle process comprises a multi-level compression stage intercooling process, a countercurrent flow process, a constant-pressure combustion process, an adiabatic expansion process, a post-cooling process and a carbon dioxide and water removal process, wherein the compression power consumption in the multi-level compression stage intercooling process is reduced; exhaust energy in the countercurrent flow process is recovered, and the cycle thermal energy use ratio is improved; the constant-pressure combustion process adopts independent oxygen supply, the compression power consumption is reduced, meanwhile, a working medium does not contain nitrogen, NOx is not generated, an inert gas is adopted as the working medium, and the process is clean and efficient; carbon dioxide and water generated by the combustion process are partially or completely removed according to the type of a first working medium, the fresh working medium quantity demand is small, and the half-closed constant-pressure internal combustion thermodynamic cycle method is applied in environments such as underwater and oxygen deficit.

Description

technical field [0001] The invention relates to a prime mover, in particular to a semi-closed constant-pressure internal combustion thermodynamic cycle method and system of the prime mover. Background technique [0002] Improving the efficiency of internal combustion engines and reducing emissions have an important positive effect on saving resources and protecting the environment. Through the improved cycle process and combustion organization, the efficiency of the prime mover can be improved and the emission of harmful pollutants can be reduced. At present, the thermodynamic cycles used in internal combustion engines mainly include the Diesel cycle (p-v diagram as shown in figure 1 shown), Otto cycle (p-v diagram as figure 1 shown), Atkinson cycle (p-v as shown in figure 1 shown), Miller cycle, Brayton cycle, etc. Among them, Diesel cycle, Otto cycle, Atkinson cycle, Miller cycle should be mainly used in traditional reciprocating piston internal combustion engines, whil...

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Problems solved by technology

[0021] In order to solve the deficiencies in the thermodynamic cycle of common internal combustion engines, improve the conversion efficiency of thermal power, realize cleanliness and high efficiency, and solve the problems of being inconvenient to work underwater, the technical solution of the present invention is to provide a semi-closed constant pressure internal combustion engine for prime movers. thermodynamic cycle method

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