Compressor Energy Recovery Unit Using Oil Heat
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Solution Overview
Problem
Current systems dissipate thermal energy generated during compressor operation, primarily through radiators cooled by air or another fluid, failing to effectively recover and convert this energy into mechanical or electrical power.
Innovation Solution
A compressor and energy-recovery unit incorporating a bladed expander with a thermostatting mechanism that captures thermal energy from lubricating/cooling oil and converts it into mechanical or electrical power, utilizing an Organic Rankine Cycle (ORC) or Hirn cycle to optimize energy recovery through a bladed expander with a heat exchanger system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thermal energy is dissipated through radiators cooled by air or fluid, then the compressor can maintain operating temperature, but energy is lost without being converted into mechanical or electrical power
Solution Approach 1:
The patent converts the previously harmful waste thermal energy into beneficial mechanical or electrical power by integrating an expander device. The expander utilizes the temperature difference between hot lubricating oil and cold cooling fluid to generate useful work, transforming the waste heat problem into an energy recovery opportunity that reduces overall energy loss while maintaining thermal management.
Solution Approach 2:
The lubricating oil performs multiple functions: it lubricates moving parts, cools the compressor components, and now serves as the heat source for the expander. The cooling fluid simultaneously cools the compressor and acts as the cold reservoir for the expander. This multi-functionality reduces the need for separate systems and minimizes energy waste.
2Productivity
If an expander is integrated with the compressor to convert thermal energy into mechanical power, then energy recovery efficiency improves, but the device complexity increases
Solution Approach 1:
The patent merges the compressor and expander into a single integrated unit, sharing common components such as the lubricating oil circuit, cooling fluid circuit, and structural housing. This combination allows the expander to utilize the thermal energy already present in the system without requiring entirely separate systems, thereby improving energy recovery efficiency while limiting the increase in overall system complexity through component sharing.
Solution Approach 2:
The lubricating oil and cooling fluid serve as intermediary substances that transfer thermal energy from the compressor to the expander. These fluids mediate the energy transfer process, allowing the expander to convert thermal energy into mechanical work without direct thermal contact between the compressor and expander, thus enabling efficient energy recovery while maintaining system modularity.
3Device complexity
If the lubricating oil is used as the heat source for the expander, then the need for separate cooling systems is reduced, but the oil temperature must be maintained within specific ranges
Solution Approach 1:
The system incorporates temperature monitoring and control mechanisms that provide feedback to regulate the thermal energy extraction from the lubricating oil. By monitoring the oil temperature and adjusting the heat extraction rate accordingly, the system maintains the oil temperature within optimal ranges for both lubrication performance and expander efficiency, preventing overheating or insufficient thermal energy availability.
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 system achieves a significant energy saving by converting thermal power into mechanical or electrical power, with an efficiency of approximately 15%, reducing the electric power absorption by over 10% and enabling the reuse of recovered energy.
Implementation Method 1
utilizing an Organic Rankine Cycle (ORC) or Hirn cycle to optimize energy recovery
Implementation Method 2
recuperator for recovery of thermal energy from the lubricating/cooling oil of a compressor and for conversion of said energy into mechanical energy
Implementation Method 3
a bladed expander with a thermostatting mechanism that captures thermal energy from lubricating/cooling oil
Data Source
Figure 1~2
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AI summary
A compression and energy-recovery unit, comprising a compressor (42) driven by an electric motor (43) and provided with a lubricating/cooling oil system and a Rankine-cycle or Hirn-cycle recuperator (41), which is provided with a bladed expander (1) and uses a working fluid in at least indirect heat exchange with the lubricating/cooling oil of the compressor (42).