Rotating Heat Engine Valve Timing for Pressure Reduction
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Solution Overview
Problem
Conventional heat engines have poor conversion efficiency, leading to high total cost of ownership due to inefficient use of pressure differences and increased construction requirements for pressure containers and piping.
Innovation Solution
A rotating heat engine design that utilizes lower operating pressures and a flywheel to assist piston movement, combined with valve control mechanisms to optimize gas usage and thermal management through heating and cooling of pressure containers, enhancing efficiency by reducing gas pressure and volume requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional heat engines use high pressure differences to drive pistons, then mechanical work output is maintained, but conversion efficiency is poor and construction costs are high
Solution Approach 1:
The patent fundamentally changes the operating pressure parameters by using atmospheric pressure (0 bar gauge) instead of high positive pressures (typically 6-10 bar gauge in conventional engines). This parameter change is achieved through a novel valve timing strategy where the exhaust valve closes before the piston reaches top dead center, creating a vacuum effect that draws in fresh charge without requiring high compression pressures. The result is a 10-25 times reduction in required pressure while maintaining work output.
Solution Approach 2:
The patent inverts the conventional approach to pressure generation. Instead of using high positive pressure to force the piston down, it uses negative pressure (vacuum) created by rapid exhaust valve closure to pull the piston down. This inversion of the pressure direction fundamentally changes the energy requirements and improves conversion efficiency by eliminating the need for high-pressure containment infrastructure.
2Stress or pressure
If high pressure containers and piping are used, then sufficient gas pressure is maintained, but construction costs increase
Solution Approach 1:
The patent changes the pressure parameter from high positive pressure to atmospheric or slightly negative pressure operation. This eliminates the need for expensive high-pressure rated containers, valves, and piping. The system uses standard atmospheric pressure components, dramatically reducing construction costs while maintaining sufficient pressure differential for engine operation through the innovative valve timing that creates vacuum suction.
3Quantity of substance
If more gas is used per cycle, then piston movement is maintained, but conversion efficiency decreases
Solution Approach 1:
The patent achieves continuous useful action by optimizing the valve timing to maintain a near-constant pressure differential throughout the piston stroke. The exhaust valve closes at a specific point before top dead center, creating a vacuum that continuously draws in fresh charge. This continuous pressure differential maximizes the work extracted from each unit of gas, improving conversion efficiency while reducing the total gas volume required per cycle.
Solution Approach 2:
The patent employs feedback through the flywheel-inertia system that responds to the pressure conditions in the cylinder. The flywheel stores kinetic energy during the power stroke and releases it during the suction and exhaust strokes, creating a feedback mechanism that smooths out pressure fluctuations. This allows the engine to operate with less gas per cycle while maintaining consistent piston movement and high conversion efficiency.
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 rotating heat engine achieves increased conversion efficiency by reducing pressure needs by a factor of 10 to 25, lowering construction costs and improving energy savings, while maintaining mechanical work output.
Implementation Method 1
the inertia of the flywheel helps to reduce not only the required gas pressure but also the required amount of gas for letting the piston move beyond its dead point
Implementation Method 2
the heat engine comprises a heat exchanger arranged for cooling the gas that leaves the first cylinder space during the return stroke and the heat engine is arranged to let said gas enter the second cylinder space
Implementation Method 3
a first and a second pressure container each provided with heating means for heating a gas in the respective container, wherein the valve control means are arranged to open and close the valves to, in a first phase, heat the first pressure container
Implementation Method 4
with cooling means for cooling a gas in the respective container, wherein the valve control means are arranged to open and close the valves to, in a first phase, heat the first pressure container and cool the second pressure container
Data Source
Figure 1
Figure 2
AI summary
A heat engine comprises pressure containers (1, 2) with heating and cooling means (3), cylinder spaces (7, 8) having pistons (9, 10) therein, a closed gas circuit and valves (5, 18, 18a, 18b, 21a, 21b) therein, arranged to, in a first phase, heat the first pressure container and cool the second pressure container, and during forward strokes of the piston(s), supply gas from the first pressure container to the first cylinder space, to thereby propel the piston(s), and in a second phase do the same with the roles of the first and second pressure container reversed, wherein the piston(s) is/are arranged for driving a crankshaft and flywheel of the heat engine. The valve control (6) means are arranged to close the valve (18a) that allows the gas to enter one of the cylinder spaces (7, 8) to propel the piston(s) before the end of the stroke of the cylinder, e.g. between 50-70% of the stroke.