Heat pump with multiple vapor generators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heat pump systems for vehicles lack efficient multi-vapor generator configurations, which can lead to suboptimal performance in various operating modes such as cabin cooling, battery cooling, and heating, due to the lack of a structured refrigerant loop design that effectively manages pressure and thermal exchange across multiple vapor generators.
Innovation Solution
A heat pump system with a refrigerant loop that includes multiple vapor generators, heat exchangers, expansion valves, and shutoff valves, where each vapor generator is positioned downstream of the compressor outlet and upstream of the mid-pressure inlet, allowing for efficient thermal phase separation and fluid management through a network of conduits and valves, enabling flexible operation across different modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single vapor generator is used in the heat pump system, then the device complexity is reduced, but the adaptability and performance across different operating modes (cabin cooling, battery cooling, heating) deteriorate
Solution Approach 1:
The heat pump system is divided into multiple independent vapor generators (first vapor generator for cabin cooling, second vapor generator for battery cooling, third vapor generator for heating) instead of using a single vapor generator. Each vapor generator can operate independently or in combination with others, allowing the system to adapt to different operating modes without requiring a completely different system configuration.
2Productivity
If multiple vapor generators are positioned in series downstream of the compressor, then the thermal energy exchange efficiency is improved, but the pressure management and system control complexity increases
Solution Approach 1:
The refrigerant loop is segmented into multiple parallel paths, each leading to a separate vapor generator. This segmentation allows independent pressure and flow control for each vapor generator through dedicated expansion valves and flow control mechanisms, simplifying the overall pressure management while maintaining high thermal exchange efficiency in each path.
Solution Approach 2:
Flow control valves and expansion devices are introduced as intermediary components between the compressor and each vapor generator. These intermediaries regulate the refrigerant flow and pressure to each vapor generator independently, enabling efficient thermal exchange without requiring complex direct pressure management across multiple series-connected vapor generators.
3Productivity
If a structured refrigerant loop with multiple heat exchangers and valves is implemented, then the thermal phase separation and fluid management efficiency is improved, but the device complexity and manufacturing cost increases
Solution Approach 1:
The refrigerant loop is segmented into distinct functional sections: compression section, expansion section (with individual expansion valves for each vapor generator), heat exchange section (with multiple heat exchangers for different thermal processes), and return section. This modular segmentation allows each section to be optimized independently for its specific function while simplifying the overall manufacturing process through standardized component interfaces.
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 configuration enhances the heat pump's ability to efficiently manage thermal energy exchange across multiple modes, improving cooling and heating performance by optimizing vapor generation and pressure management, thus enhancing overall system efficiency and flexibility.
Implementation Method 1
The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet
Implementation Method 2
a first vapor generator, a second vapor generator, and a third vapor generator... allowing for efficient thermal phase separation
Implementation Method 3
The first heat exchanger is positioned downstream of the first vapor generator. The second heat exchanger is positioned downstream of the second vapor generator. The third heat exchanger is positioned downstream of the third vapor generator
Implementation Method 4
a first expansion valve positioned immediately upstream of the first vapor generator, a second expansion valve positioned immediately upstream of the second vapor generator, and a third expansion valve positioned immediately upstream of the third vapor generator
Data Source
AI summary
A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first vapor generator, a second vapor generator, and a third vapor generator. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The first vapor generator, the second vapor generator, and the third vapor generator are each positioned downstream of the outlet of the compressor. The first vapor generator, the second vapor generator, and the third vapor generator are each positioned upstream of the mid-pressure inlet of the compressor.