Thermoelectric Generator in Vehicle HVAC Systems
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Solution Overview
Problem
HVAC systems for vehicles face challenges with increased weight and high electrical energy consumption, particularly when stationary, which reduces battery range and efficiency.
Innovation Solution
The integration of a thermoelectric generator within the HVAC system, utilizing temperature differences across various components to generate electrical energy, thereby reducing energy demand and weight by eliminating the need for a condenser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional HVAC system is used with all standard components including condenser, then the system can provide complete cooling and heating functions, but the weight of the system increases and electrical energy consumption increases
Solution Approach 1:
The patent extracts and removes the condenser component from the conventional HVAC system. The thermoelectric generator is positioned to utilize the temperature difference that would otherwise be wasted between the compressor discharge and evaporator suction lines, eliminating the need for a separate condenser while maintaining system functionality.
Solution Approach 2:
The thermoelectric generator serves multiple functions: it generates electrical energy from the temperature difference, and simultaneously acts as a heat transfer component connecting the high-temperature and low-temperature lines. This multi-functionality reduces the number of separate components needed.
2Weight of moving object
If a conventional HVAC system with all standard components is used, then the system provides complete temperature regulation, but the weight of the vehicle increases
Solution Approach 1:
The condenser component is extracted and removed from the system. The thermoelectric generator is strategically positioned between the compressor and evaporator to utilize the temperature gradient, eliminating the need for a separate condenser while maintaining temperature regulation capability.
Solution Approach 2:
The thermoelectric generator merges the functions of energy generation and heat transfer into a single component. It simultaneously generates electrical energy and facilitates heat transfer between the high-temperature and low-temperature lines, replacing what would traditionally require separate condenser and generator components.
3Ease of operation
If the HVAC system operates while the vehicle is stationary, then cooling can be provided, but electrical energy consumption increases which reduces battery range
Solution Approach 1:
The thermoelectric generator enables the HVAC system to partially power itself by converting the temperature difference between the compressor discharge and evaporator suction lines into electrical energy. This self-service capability reduces the electrical load on the vehicle battery during stationary operation.
Solution Approach 2:
The temperature difference that represents wasted energy in a conventional system is converted into a beneficial source of electrical energy. The thermal gradient between the hot and cold lines, which would otherwise be dissipated, is now harnessed to generate power that offsets the HVAC system's energy consumption.
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 solution reduces the overall weight and energy consumption of HVAC systems, generating electrical energy that can offset the system's power requirements and improve vehicle range and efficiency.
Implementation Method 1
the first thermoelectric generator is configured to generate electrical energy based on a temperature difference between the first end and the second end
Data Source
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AI summary
A heating, ventilation, and air conditioning system includes an evaporator configured to provide a working fluid in a gaseous state at a first temperature range and a first pressure, and a compressor downstream from the evaporator. The compressor is configured to provide the working fluid in the gaseous state at a second temperature range and a second pressure, and the second temperature range is greater than the first temperature range and the second pressure greater than the first pressure. The system includes a first thermoelectric generator arranged between the evaporator and the compressor. A first end of the first thermoelectric generator is configured to receive the working fluid from the evaporator, and a second end is configured to receive the working fluid from the compressor. The first thermoelectric generator is configured to generate electrical energy based on a temperature difference between the first end and the second end.