Ammonia Heat-Exchange Unit with Adjustable Louvers for Engine Cooling
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Solution Overview
Problem
Existing internal combustion engines face challenges in using ammonia as a fuel due to slow combustion rates and the need for secondary combustion promoters, and hydrogen storage is problematic due to low density and safety issues, while conventional catalytic converters lack sufficient surface area and hermetic sealing for efficient ammonia dissociation and vehicle cooling systems impact aerodynamics and efficiency.
Innovation Solution
A system incorporating an ammonia tank, heat-exchange unit, radiator, and adjustable louvers, with an electronic control unit to manage airflow and heat transfer, enabling efficient ammonia cracking and hydrogen production without fossil fuels, and using ammonia as a heat-exchange medium for cooling, thereby optimizing engine temperature and reducing ambient airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If ammonia is used as fuel in internal combustion engines, then zero CO2 emissions are achieved, but combustion rate is too slow to complete combustion during power stroke
Solution Approach 1:
The patent combines ammonia with a secondary combustion promoter fuel (gasoline, liquefied petroleum, or diesel) to create a dual-fuel system. The ammonia provides zero CO2 emissions while the secondary fuel accelerates combustion rate, resolving the contradiction between emission reduction and combustion speed.
Solution Approach 2:
The patent changes the combustion parameters by introducing a secondary fuel that alters the flame propagation characteristics. This allows the system to maintain the environmental benefits of ammonia while achieving combustion rates suitable for four-stroke engines operating at thousands of RPM.
2Temperature
If conventional radiator cooling systems are used, then engine cooling is achieved, but vehicle aerodynamics are degraded and efficiency is reduced
Solution Approach 1:
The patent employs adjustable air intake louvers that can dynamically open or close based on operating conditions. This allows the system to optimize aerodynamics during normal operation by closing the louvers, while still providing adequate cooling when needed, thus reducing the constant energy loss associated with open radiators.
Solution Approach 2:
The patent changes the physical state or configuration of the cooling system by using adjustable louvers that modify airflow parameters. This allows the system to transition between different operational states (cooling vs. aerodynamic optimization) without permanently compromising either function.
3Use of energy by moving object
If hydrogen is stored for fuel use, then clean energy availability is improved, but storage is problematic due to low density and safety issues
Solution Approach 1:
The patent uses ammonia as an intermediary carrier for hydrogen energy. Instead of storing hydrogen directly (which has safety and density problems), the system stores ammonia and uses catalytic converters to convert it to hydrogen on-demand. This intermediary approach maintains clean energy availability while eliminating direct hydrogen storage safety issues.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system allows for zero-carbon emissions by using ammonia-derived hydrogen as fuel, enhances engine cooling efficiency, and improves vehicle aerodynamics by minimizing radiator size, while ensuring safe and efficient ammonia dissociation and hydrogen production.
Implementation Method 1
heat-exchange unit receiving ammonia from the ammonia tank... heat is transferred from the hot engine coolant to the ammonia within the heat-exchange unit, resulting in heated ammonia and cooled engine coolant
Implementation Method 2
radiator receiving hot engine coolant from the internal combustion engine... supplying the hot engine coolant to the heat-exchange unit
Implementation Method 3
radiator... facilitating cooling of the hot engine coolant
Implementation Method 4
at least one louver... maximizing ambient airflow to the radiator to facilitate cooling of the hot engine coolant
Data Source
AI summary
The present invention relates, in general, to systems and methods for generating hydrogen from ammonia on-board vehicles, where the produced hydrogen is used as fuel source for an internal combustion engine along with ammonia. The present invention utilizes ammonia not only as a co-fuel for the engine, but also as a heat-exchange medium used by a cooling system that supplements radiator cooling along with air intake louvers that are adjusted based on the temperature of the internal combustion engine.