Automotive Engine Generators for Fast-Start Long-Duration Power
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Solution Overview
Problem
Current renewable energy grids face reliability issues due to variable solar and wind power, and existing battery technologies are costly for long-duration electricity supply, necessitating a supplemental power source that is cost-effective, flexible, and environmentally friendly.
Innovation Solution
Modestly modified automotive engine powered generator systems utilizing high RPM and stoichiometric air-fuel ratios for low-carbon fuel flexibility, including hydrogen, methanol, and ammonia, with three-way catalyst and SCR exhaust treatment for low NOx emissions, providing high power density and rapid start capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If present battery technology is used for long-duration electricity supply, then energy storage capability is improved, but cost increases linearly with duration becoming extremely expensive for 12 hours or more
Solution Approach 1:
The system divides the power supply function into two segments: batteries handle short-duration (up to 4 hours) power needs, while multifuel automotive engines handle long-duration (12+ hours) power needs. This segmentation allows each technology to operate in its optimal cost and performance range, avoiding the prohibitive costs of using batteries for extended periods.
Solution Approach 2:
The system uses existing automotive engines (designed for mobile applications) and adapts them for stationary power generation. By copying proven automotive engine technology and modifying it for stationary use, the system avoids the need to develop entirely new expensive long-duration storage solutions, leveraging existing reliable and cost-effective engine technology.
2Power
If open cycle gas turbines and large reciprocating engines are used for supplemental power, then power output is improved, but cost per kW and complexity increase
Solution Approach 1:
The system uses multifuel automotive engines that can operate on multiple fuel types (natural gas, propane, ethanol, gasoline, and emerging low-carbon fuels). This multi-functionality allows a single engine design to serve various supplemental power needs without requiring different specialized engines for each fuel type, reducing overall system complexity while maintaining high power output capability.
Solution Approach 2:
The system employs modified automotive engines that are inherently more cost-effective per kW compared to traditional stationary power plants. These engines represent a more economical, simpler alternative to expensive gas turbines and large reciprocating engines, providing adequate power output at lower capital cost and reduced complexity.
3Reliability
If high power density operation is used to reduce cost per kW, then cost effectiveness is improved, but emission control requirements increase
Solution Approach 1:
The system maintains high power density operation (50-200 kW per liter) to achieve low cost per kW, while using stoichiometric air-fuel ratios and high RPM operation to optimize combustion efficiency. These parameter changes allow the engines to deliver high power output while minimizing emissions, reconciling cost effectiveness with environmental performance.
Solution Approach 2:
The system converts what would normally be harmful emissions into benefits by using three-way catalysts and SCR exhaust treatment. These technologies capture and convert harmful exhaust components into less harmful substances, allowing the high power density engines to maintain low emissions despite their intense combustion operation.
4Adaptability or versatility
If renewable energy utilization is increased for meeting present uses and future sectors, then sustainability is improved, but grid reliability deteriorates due to variable solar and wind power
Solution Approach 1:
The system acts as an intermediary between variable renewable energy sources and the electricity grid. When solar and wind power are insufficient or unavailable, the multifuel automotive engines provide supplemental power to maintain grid reliability. This intermediary role allows high levels of renewable utilization while ensuring continuous reliable power supply.
Solution Approach 2:
The system performs preliminary action by having supplemental power capacity pre-positioned and ready to deploy when renewable energy falls short. The engines can be rapidly started and brought online to fill gaps in solar and wind generation, preventing reliability issues before they occur rather than reacting after problems arise.
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
The solution offers significantly reduced costs per kW, lower NOx emissions, and rapid start times, enabling reliable and flexible supplementary power generation for grid stability and fast electric vehicle charging, while minimizing environmental impact.
Implementation Method 1
three-way catalyst and SCR exhaust treatment for low NOx emissions
Data Source
AI summary
Modestly modified automotive engine powered generator systems to substantially improve capability for providing renewable electricity powered grid reliability and energy storage are disclosed. The use of these engines to improve capability for non-grid electricity generation, including affordable and clean fast charging of electric vehicles, is also disclosed. In one embodiment, these automotive engines use high RPM and stoichiometric air fuel ratio operation so as to provide the advantages of substantially reduced cost and NOx emissions. These engines also have multifuel capability that provides highly flexible use of low carbon fuels (such as hydrogen, methanol and ammonia) as well as the use of present fuels that are widely available. When these low-carbon fuels are produced with excess electricity from the grid and supplied to the grid when there is an electricity-supply shortfalls, they can serve as a means of energy storage.