Slow Actuation Liquid Piston Heat Pump for Carnot Efficiency
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Solution Overview
Problem
Current heat pumps rely on refrigerant fluids that are polluting, toxic, or combustible, and they have efficiency limitations compared to the ideal Carnot efficiency, especially in high-temperature applications.
Innovation Solution
A slow-actuation mechanical liquid piston heat pump that uses a gas remaining entirely in the gaseous state without state change, employing a compressor and expander with adiabatic and isothermal processes to approach the Carnot cycle efficiency, and operates with atmospheric air or nitrogen to avoid regulatory and safety issues related to refrigerant fluids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If refrigerant fluid heat pumps use state change cycles, then calorie power density is improved, but performance coefficient remains below ideal Carnot efficiency
Solution Approach 1:
The patent changes the thermodynamic parameters by using a single-phase gas working fluid instead of refrigerant fluid with state changes. The gas undergoes isothermal compression and expansion processes, changing pressure and temperature parameters while remaining in the gaseous state, thereby approaching Carnot efficiency without phase transitions
Solution Approach 2:
The patent replaces the conventional refrigerant compression-expansion mechanism with a mechanical liquid piston system that directly compresses and expands a gas working fluid through isothermal processes, substituting the traditional vapor-compression cycle mechanics with a liquid-piston-driven gas cycle
2Ease of operation
If conventional heat pumps use refrigerant fluids, then heating and cooling functionality is achieved, but safety and environmental issues arise
Solution Approach 1:
The patent uses an inert gas working fluid (such as nitrogen or air) that does not pose toxicity or environmental hazards. The inert atmosphere replaces conventional refrigerant fluids, maintaining heating and cooling functionality while eliminating harmful factors associated with traditional refrigerants
3Productivity
If fast-acting compressors are used, then productivity is improved, but mechanical efficiency and energy loss worsen
Solution Approach 1:
The patent employs periodic reciprocating motion of the liquid piston through crankshaft mechanisms, creating controlled compression and expansion cycles. The periodic action allows optimization of both speed and mechanical efficiency by coordinating the timing of intake, compression, expansion, and exhaust phases
Solution Approach 2:
The patent uses dynamic elements including a rotating crankshaft and reciprocating liquid piston to convert rotational motion to linear compression/expansion motion. The dynamic system allows variable speed operation while maintaining mechanical efficiency through proper timing and coordination of moving parts
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 achieves a performance coefficient significantly greater than conventional refrigerant fluid heat pumps, reducing energy consumption for heating and cooling, and operates efficiently with a wide temperature range without the need for toxic or polluting refrigerants.
Implementation Method 1
compressor heat exchange and accumulation means which are housed in the compressor gas and liquid reservoir, said means being able mainly to take heat from the working gas contained in said reservoir and temporarily store said heat, before yielding the latter to the working liquid also contained in said reservoir
Implementation Method 2
expander heat exchange and accumulation means which are housed in the expander gas and liquid reservoir, said means being able mainly to take heat from the working liquid contained in said reservoir and temporarily store said heat, before yielding the latter to the working gas also contained in said reservoir
Data Source
AI summary
The slow-actuation mechanical liquid piston heat pump (1) with a blind liquid cylinder (8) in which a double-acting hydraulic piston (10) translates which is secured to a connecting rod (11) connected to connecting rod actuating means (144), a piston (10) forming with a cylinder (8) a compressor hydraulic variable volume (12) which communicates with a compressor gas and liquid reservoir (14) in which are housed heat exchange and accumulation means (16) to form a compressor (3), and a expander hydraulic variable volume (134) which communicates with a expander gas and liquid reservoir (137) in which are housed expander heat exchange and accumulation means (139) to form an expander (4).