CN-121977848-A - Integrated verification platform and verification method

CN121977848ACN 121977848 ACN121977848 ACN 121977848ACN-121977848-A

Abstract

The application relates to an integrated verification platform and a verification method, wherein the integrated verification platform comprises an ammonia fuel supply system, an ammonia fuel medium-speed engine system, a decision system and a test verification system, wherein the ammonia fuel supply system and the ammonia fuel medium-speed engine system are respectively and independently provided with corresponding security control units and execute corresponding security strategies, the decision system is used for collecting state data of all systems in real time and triggering an alarm based on alarm signals, and feeding back security decision levels determined according to security interlock logic to the corresponding security control units to execute the corresponding security strategies, and the test verification system is used for analyzing cooperative response states of all systems based on injection of simulated fault signals so as to verify response performance of the security control units. A set of special safety subsystems aiming at high-risk characteristics of ammonia fuel is provided, and the whole set of the system can reliably and cooperatively execute safety instructions.

Inventors

LI HONGMEI
ZHANG WENZHENG
LIANG GANG
ZHENG LIANG
LI XIAO
ZHU QING

Assignees

中国船舶集团有限公司第七一一研究所

Dates

Publication Date: 20260505
Application Date: 20260327

Claims (15)

1. The integrated verification platform is characterized by comprising an ammonia fuel supply system, an ammonia fuel medium-speed engine system, a security control unit, a decision system and a test verification system; the security control unit comprises a first security control unit and a second security control unit; the ammonia fuel supply system is internally provided with the first security control unit and is used for monitoring and adjusting fuel parameters and processing fault information and executing a first security strategy based on the received trigger signal; The ammonia fuel medium speed engine system is internally provided with the second security control unit which is used for monitoring risk parameters of ammonia fuel operation and executing a second security policy when abnormality occurs; the decision system is used for collecting state data of all systems in real time, triggering alarm based on alarm signals, and feeding back a security decision level determined according to the security interlock logic to the security control unit so as to execute a corresponding security policy; the test verification system is used for analyzing the cooperative response state of each system based on the injection of the simulated fault signals so as to verify the response performance of the security control unit.
2. The integrated verification platform of claim 1, wherein the test verification system is further configured to perform fuel mode switching security verification under different load conditions, and to simulate engine security verification in a switching failure scenario.
3. The integrated verification platform of claim 1, wherein the integrated verification platform comprises an ammonia fuel purge and waste recovery system integrating a purge manifold with a waste recovery unit; The purging branch pipes are paved to the appointed area to form independent partition purging loops, and the independent partition purging loops are used for purging the partition purging loops based on partition nitrogen purging procedures when the machine is stopped or ammonia leaks, and residual ammonia is purged to the waste liquid recovery unit for treatment.
4. The integrated verification platform of claim 1, comprising monitoring sensors distributed across a target risk area for monitoring ammonia gas present in the target risk area, wherein the target risk area comprises the ammonia fuel supply system, an ammonia fuel injector, and a pipe interface.
5. The integrated verification platform of claim 4, wherein the decision system comprises a security meter skin for receiving alarm signals fed back by the monitoring sensor, the first security control unit, and the second security control unit, prioritizing the received alarm signals, and performing an audible and visual alarm based on the prioritized priority and a predefined alarm pattern.
6. The integrated verification platform of claim 4, wherein the integrated verification platform comprises a ventilation system for ventilating a leakage area where ammonia gas detected by the monitoring sensor is located.
7. The integrated verification platform of claim 1, wherein the decision system comprises a safety logic solver and an interactive interface; the safety logic solver is used for receiving safety related information, determining a safety decision level based on the safety related information and safety interlocking logic, and feeding back the safety decision level to the first safety control unit and the second safety control unit to execute a corresponding safety strategy; the interactive interface is used for visually displaying the system state, the real-time alarm list, the safety interlocking logic and the verification data.
8. The integrated verification platform of claim 1, wherein the systems in the integrated verification platform are linked by a three-layer coupling mode, wherein the three-layer coupling mode comprises pipeline mechanical connection, electrical connection and control communication network connection; The pipeline is mechanically connected with the ammonia fuel supply system, the ammonia fuel medium-speed engine system and the test verification system; The electrical connection is used for transmitting an emergency stop instruction with the highest priority; The control communication network is connected to synchronize the status of each system and the verification data.
9. The integrated verification platform of claim 1, wherein the first security policy comprises an emergency shutdown operation and the second security policy comprises a fuel mode forced switch or an engine safe shutdown.
10. A verification method using an integrated verification platform as claimed in any one of claims 1 to 9, the method comprising: Starting each system in the integrated verification platform, performing safety self-checking, and determining a safety ready state; starting an engine to run in a pure diesel mode and establishing a performance baseline based on the safe ready state; Switching the pure diesel mode to an ammonia diesel dual-fuel mode at different ammonia substitution rates, determining a safety parameter operated in the ammonia diesel dual-fuel mode at each ammonia substitution rate, and obtaining a comparison standard according to the performance baseline and the safety parameter; When the engine runs under the working condition of the target ammonia substitution rate, injecting a simulated fault signal through a safety logic solver, and analyzing the cooperative response state of each system in the integrated verification platform; and evaluating the security policy according to the cooperative response state of each system, and comparing the evaluation result with the comparison standard to verify the response performance of the security control unit, wherein the security control unit comprises a first security control unit and a second security control unit.
11. The method of claim 10, wherein the injecting simulated fault signals through the safety logic solver analyzes the collaborative response state of each system in the integrated verification platform comprises: Injecting a simulation fault signal into a second security control unit arranged in the ammonia fuel medium speed engine system through a test interface of the safety logic solver, wherein the simulation fault signal comprises a simulation signal of an ammonia injection valve driving fault; When the second security control unit recognizes the simulated fault signal, an alarm signal is sent to a decision system, and forced switching of a fuel mode is automatically executed; and recording the whole process time sequence after the analog signals are injected to analyze the cooperative response state of each system in the integrated verification platform.
12. The method according to claim 10, characterized in that the method comprises: executing the bidirectional switching operation of the fuel mode under a plurality of load working conditions, and collecting dynamic parameters in the ammonia fuel combustion process to detect abnormal fluctuation in real time; and simulating a switching failure scene of the fuel mode, and verifying whether the engine can successfully fall back to the pure diesel mode without ammonia leakage risk.
13. The method of claim 12, wherein the dynamic parameters include in-cylinder combustion pressure, unburned ammonia concentration in the exhaust gas, and ammonia fuel pressure fluctuations at a switching instant.
14. The method according to claim 10, wherein the method further comprises: And detecting or simulating the leakage event of the engine compartment in real time through a global monitoring sensor, and executing a grading emergency treatment process.
15. The method of claim 14, wherein the hierarchical emergency treatment process comprises: When ppm ammonia leakage is detected and the concentration continuously rises, a sensor signal triggers an audible and visual alarm on the surface layer of the safety instrument, and a leakage area and the leakage concentration are displayed on an interactive interface; interlocking and starting a ventilation system through a safety logic solver to ventilate the leakage area; If the leakage concentration exceeds a preset threshold, the safety logic solver sends a scram instruction with the highest priority to a first security control unit and a second security control unit in an ammonia fuel supply system; and synchronously starting a regional nitrogen purging program of the leakage region, and purging the residual ammonia to a waste liquid recovery unit for recovery treatment.

Description

Integrated verification platform and verification method Technical Field The application mainly relates to the technical field of engine testing, in particular to an integrated verification platform and a verification method. Background Annual emissions in the shipping industry are about 3% of global artificial greenhouse gas (GHG) emissions, and the shipping industry is facing more stringent "decarbonization" challenges. The ammonia fuel is a carbon-free fuel, CO 2 is not generated in the combustion process, the problem of carbon emission can be fundamentally solved in the using link, and meanwhile, the ammonia fuel has the characteristics of easy storage and transportation, high energy utilization efficiency in the manufacturing process, low manufacturing cost and the like, and the ammonia fuel is regarded as a future internal combustion engine implementation solution to be highly valued internationally, and related organizations take ammonia as one of main solutions for realizing zero carbon emission in future shipping. However, its inherent high toxicity, strong corrosiveness, high ignition energy, and narrow flammability limits present unprecedented challenges to the fuel supply, combustion organization, material compatibility, and operational safety of engines. The existing general engine verification platform mainly solves the problems of multi-fuel adaptability and general component multiplexing, and the design center of gravity is in universality and cost control. However, such platforms lack dedicated safety subsystems (such as global leak monitoring, emergency purge, waste ammonia recovery, etc.) for high-risk characteristics of ammonia fuel, nor do they construct a set of system-level safety verification flows for static and dynamic conditions through various modules of a supply system, an ammonia medium speed engine, a laboratory, waste ammonia recovery, etc. The key safety risk of the ammonia fuel engine cannot be fully exposed and verified in the stage of a rack in the research and development process, and huge hidden hazards are buried for subsequent real-ship applications. Disclosure of Invention The application aims to provide an integrated verification platform and a verification method, which solve the problem that a special safety subsystem and a safety verification flow aiming at high-risk characteristics of ammonia fuel are lacked in the prior art. According to one aspect of the application, an integrated verification platform is provided, which comprises an ammonia fuel supply system, an ammonia fuel medium-speed engine system, a security control unit, a decision system and a test verification system; the security control unit comprises a first security control unit and a second security control unit; the ammonia fuel supply system is internally provided with the first security control unit and is used for monitoring and adjusting fuel parameters and processing fault information and executing a first security strategy based on the received trigger signal; The ammonia fuel medium speed engine system is internally provided with the second security control unit which is used for monitoring risk parameters of ammonia fuel operation and executing a second security policy when abnormality occurs; the decision system is used for collecting state data of all systems in real time, triggering alarm based on alarm signals, and feeding back a security decision level determined according to the security interlock logic to the security control unit so as to execute a corresponding security policy; the test verification system is used for analyzing the cooperative response state of each system based on the injection of the simulated fault signals so as to verify the response performance of the security control unit. Optionally, the test verification system is further used for fuel mode switching safety verification under different load working conditions and engine safety verification conducted by simulating a switching failure scene. Optionally, the integrated verification platform comprises an ammonia fuel purging and waste liquid recovery system integrating a purging branch pipe and a waste liquid recovery unit; The purging branch pipes are paved to the appointed area to form independent partition purging loops, and the independent partition purging loops are used for purging the partition purging loops based on partition nitrogen purging procedures when the machine is stopped or ammonia leaks, and residual ammonia is purged to the waste liquid recovery unit for treatment. Optionally, the integrated verification platform comprises monitoring sensors, wherein the monitoring sensors are distributed in a target risk area and are used for monitoring ammonia existing in the target risk area, and the target risk area comprises the ammonia fuel supply system, an ammonia fuel injector and a pipeline interface. Optionally, the decision system includes a safety instrument surface layer, configured to rece