Balanced-Pressure Multi-Compartment Vessel for Flexible Thermodynamic Cycles
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Solution Overview
Problem
Existing thermodynamic energy converters are limited by rigid movement patterns dictated by crankshaft drives, constraining the scope of operation and efficiency due to fixed cycles, which restrict the implementation of various thermodynamic changes of state and sequences.
Innovation Solution
A thermodynamic energy converter with a balanced-pressure multi-compartment vessel design, featuring interconnected heat exchanger compartments and a working compartment, allows for controlled flow through rotary valves, enabling flexible implementation of different thermodynamic cycles by varying the state parameters of the working medium, such as isothermal, isobaric, and adiabatic changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a crankshaft drive is used to convert expansion work into mechanical energy, then mechanical energy conversion is achieved, but the movement patterns become rigid and the scope of operation is limited
Solution Approach 1:
The patent replaces the traditional crankshaft mechanical drive system with a pneumatic-hydraulic system. Two pressure vessels are hydraulically coupled via a pipeline network, and a force-transforming unit (hydraulic motor or linear drive) converts the pneumatic-hydraulic forces into mechanical energy. This substitution eliminates the rigid movement patterns of the crankshaft while maintaining mechanical energy conversion capability.
Solution Approach 2:
The patent employs two pressure vessels hydraulically connected through a pipeline network filled with displacement fluid. The expansion work of the working medium in one vessel moves the displacement fluid to the other vessel, creating a force-transforming system. This pneumatic-hydraulic approach enables flexible operation without the mechanical constraints of traditional crankshaft drives.
2Reliability
If a fixed thermodynamic cycle is implemented, then the energy converter operates reliably, but the efficiency is constrained and various thermodynamic changes of state cannot be implemented
Solution Approach 1:
The patent enables dynamic adjustment of the thermodynamic cycle by allowing selective connection of heat exchanger compartments to the working compartment through controllable valve arrangements. This dynamic configuration allows the system to implement various thermodynamic changes of state (isochoric, isothermal, isobaric, adiabatic, or polytropic) and adapt to different operating conditions, thereby improving efficiency while maintaining reliability through controlled operation.
Solution Approach 2:
The patent divides the volume element into multiple heat exchanger compartments (first and second heat exchanger compartments) and a working compartment, with each compartment serving specific thermodynamic functions. This segmentation allows independent control and optimization of different thermodynamic processes within the same system, enabling flexible cycle implementation and improved efficiency.
3Device complexity
If a single volume element with fixed configuration is used, then the device structure is simple, but the ability to implement various thermodynamic cycles is restricted
Solution Approach 1:
The volume element is segmented into distinct functional compartments: a working compartment for the working medium and multiple heat exchanger compartments (first and second) for thermal energy exchange. This segmentation maintains structural simplicity while enabling various thermodynamic cycles through selective activation of different compartment combinations.
Solution Approach 2:
The volume element is designed as a multi-functional unit where the same physical structure can implement different thermodynamic cycles (Stirling, Ericsson, Otto, Diesel, or custom cycles) by selectively connecting different heat exchanger compartments to the working compartment via controllable valves. This universality achieves cycle flexibility without increasing fundamental device complexity.
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 design enhances the energy converter's performance by allowing flexible cycle implementation and improved efficiency through controlled thermodynamic changes, overcoming the limitations of rigid movement patterns and fixed cycles, thereby increasing the range of operational conditions.
Implementation Method 1
enabling flexible implementation of different thermodynamic cycles by varying the state parameters of the working medium, such as isothermal, isobaric, and adiabatic changes
Implementation Method 2
enabling flexible implementation of different thermodynamic cycles by varying the state parameters of the working medium, such as isothermal, isobaric, and adiabatic changes
Implementation Method 3
enabling flexible implementation of different thermodynamic cycles by varying the state parameters of the working medium, such as isothermal, isobaric, and adiabatic changes
Implementation Method 4
interconnected heat exchanger compartments and a working compartment, allows for controlled flow through rotary valves, enabling flexible implementation of different thermodynamic cycles
Data Source
AI summary
The invention relates to a thermodynamic energy converter (1) with at least one first and one second volume element (10a, 10b) for enclosing a working medium (102) inside a variable inner volume, including a wall that divides the inner volume into heat exchanger compartments (110, 120) and a working compartment (200), wherein a partition (230) is formed inside the working compartment (200) which divides the working compartment (200) into a working chamber (210) supplied with the working medium (201) and a force transmission chamber (212) supplied with a displacement fluid (202), the heat exchanger compartments (110, 120) and the working chamber (210) are interconnected such that the working medium (102) inside the volume element (10a, 10b) has the same pressure, and each heat exchanger compartment (110, 120) is connected to the working chamber (210) via an inlet and an outlet that is formed separately from the inlet. According to the invention, a respective inlet or outlet is designed, as a connection between the heat exchanger compartments (110, 120) and the working chamber (210), with at least one rotary valve (220) so as to prevent a flow through at least one of the heat exchanger compartments (110, 120) and to support a flow through at least one other heat exchanger compartment (110, 120).