Abrégé

Provided is a thermodynamic cycle method and system for a prime motor based on a timing constant volume combustion mode. The cycle comprises a multi-stage compression interstage cooling process, a counter-flow heat exchange process, a timing constant volume combustion process and an adiabatic expansion process, and is a thermodynamic cycle where thermal energy is converted to mechanical energy. The compression power consumption is reduced through the multi-stage compression interstage cooling process; the enthalpy of a working medium originally to be discharged to the external environment is recovered through the counter-flow heat exchange process and participates in the thermodynamic cycle so as to improve the thermal energy utilization; a long time uniform constant volume combustion at a low temperature is achieved through the timing constant volume combustion process such that the production of harmful pollutants of HC, CO, PM, NOx etc. is effectively inhibited, and at the same time the combustion efficiency is improved; and the pressure after the expansion is close to environmental pressure through the adiabatic expansion process such that a sufficient expansion working is achieved.

Classes IPC  ?

• F02G 1/00 - Ensembles fonctionnels de moteurs à gaz chauds à déplacement positif

Abrégé

Provided is a thermodynamic cycle method and system for a semi-closed constant pressure internal combustion in a prime motor. The cycle process thereof comprises a multi-stage compression interstage cooling process, a counter-flow heat exchange process, a constant pressure combustion process, an adiabatic expansion process, a post cooling process and a process of removing carbon dioxide and water. The compression power consumption is reduced through the multi-stage compression interstage cooling process. The exhaust energy is recovered through the counter-flow heat exchange process, which improves the thermal energy utilization of the cycle. In the constant pressure combustion process, an independent oxygen supply is used to reduce the compression power consumption, moreover, the working medium does not contain nitrogen such that NOx is not produced, wherein an inert gas can be used as a working medium to allow the process to be clean and efficient. In the process of removing carbon dioxide and water, carbon dioxide and water produced in the combustion process are partly or totally removed according to the type of first type working medium. The fresh working medium is of a small demand and can be used in underwater, and oxygen deficit environments, etc.

Classes IPC  ?

• F02C 3/055 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de produits de combustion comme fluide de travail ayant une turbine entraînant un compresseur le compresseur étant du type à déplacement positif
• F02C 3/04 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de produits de combustion comme fluide de travail ayant une turbine entraînant un compresseur
• F02C 7/08 - Chauffage de l'air d'alimentation avant la combustion, p. ex. par les gaz d'échappement
• F02G 1/00 - Ensembles fonctionnels de moteurs à gaz chauds à déplacement positif

Abrégé

Provided is a method and system for a semi-closed timing constant volume thermodynamic cycle in a prime motor. The cycle thereof comprises 6 processes: a multi-stage compression interstage cooling process, a counter-flow heat exchange process, a timing constant volume combustion process, an adiabatic expansion process, a post-cooling process and a process of removing carbon dioxide and water, and is a thermodynamic cycle of heat-work conversion. The compression power consumption is reduced through the multi-stage compression interstage cooling process; the enthalpy of a working medium after the expansion is recovered through the counter-flow heat exchange process and participates in the thermodynamic cycle; the production of harmful pollutants of HC, CO, PM, NOx etc. is effectively inhibited through the timing constant volume combustion process; a sufficient expansion working is achieved through the adiabatic expansion process; the working medium is further cooled to environment temperature through the post-cooling process such that the expansion ratio of the adiabatic expansion process is improved; and carbon dioxide and water produced in the timing constant volume combustion process are removed through the process of removing carbon dioxide and water, wherein the remaining working medium continues to participate in the next thermodynamic cycle. A direction for designing a prime motor which is efficient and has a low pollutant discharge and a high performance for the future is provided.

Classes IPC  ?

• F02C 3/04 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de produits de combustion comme fluide de travail ayant une turbine entraînant un compresseur
• F02B 41/06 - Moteurs avec détente prolongée dans les cylindres compound
• F02C 7/08 - Chauffage de l'air d'alimentation avant la combustion, p. ex. par les gaz d'échappement
• F02C 5/02 - Ensembles fonctionnels de turbines à gaz caractérisés par un fluide énergétique produit par une combustion intermittente caractérisés par l'aménagement de la chambre de combustion dans l'ensemble