Semi-closed type timing constant-volume thermodynamic circulation method and system of prime motor

Abstract

The invention provides a semi-closed type timing constant-volume thermodynamic circulation method and a semi-closed type timing constant-volume thermodynamic circulation system of a prime motor. The thermodynamic circulation method comprises six processes, namely multi-compression-stage intercooling, countercurrent heat exchanging, timing constant-volume burning, adiabatic expansion, aftercooling, and carbon dioxide and water removal. Heat-power conversion is achieved in the thermodynamic circulation. In the process of multi-compression-stage intercooling, compression power consumption is lowered; in the process of countercurrent heat exchanging, the enthalpy of an expanded working medium is recovered to participate in thermodynamic circulation; the process of timing constant-volume burning effectively inhibits the generation of harmful pollutants such as HC, CO, PM and NOx; in the process of adiabatic expansion, complete expansion for working is achieved; in the process of aftercooling, the working medium is further cooled to the environment temperature and the expansion ratio in the process of adiabatic expansion is enhanced; in the process of carbon dioxide and water removal, the carbon dioxide and the water generated in the process of timing constant-volume burning are removed; the remaining work mediums participate in the next thermodynamic circulation. By the method and the system, the direction is defined for designing a high-efficiency low-pollutant-emission and high-performance prime motor in the future.

Description

technical field [0001] The invention relates to a prime mover, in particular to a semi-closed timing and constant volume thermodynamic cycle method and system for 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 shown in figure 2 shown), Atkinson cycle (P-V diagram as image 3 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, while...

AI Technical Summary

Problems solved by technology

[0020] In order to solve the deficiencies in the thermodynamic cycle of common internal combustion engines, enable thermodynamic machinery to achieve clean and efficient constant volume combustion, improve thermal efficiency, and solve the problems of inconvenient work under water, etc., the invention provides a semi-closed timing constant The capacity thermodynamic cycle method and system, the cycle process includes six processes inherent in the process, respectively, multi-stage compression interstage cooling process, countercurrent heat exchange process, timing and constant volume combustion process, adiabatic expansion process, post-cooling process and carbon dioxide and Water removal process, some embodiments also include auxiliary processes, such as pressure regulation process and oxidant and fuel mixing process

Images