Heat exchanger for a vapor compression system
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Solution Overview
Problem
Vapor compression systems face challenges in designing components compatible with environmentally-friendly refrigerants, particularly in maximizing efficiency while maintaining a high coefficient of performance (COP) comparable to traditional refrigerants.
Innovation Solution
The vapor compression system incorporates a condenser with a diffusion area and a tube plate to enhance thermal energy transfer and reduce vibrations, allowing for increased efficiency and reduced pressure drop, and includes a passage lane to expose refrigerant to centrally located tubes for improved heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional condenser design is used with environmentally-friendly refrigerants, then system compatibility is achieved, but thermal energy transfer efficiency decreases
Solution Approach 1:
The condenser incorporates a diffusion area with specific geometric characteristics (cavity without tubes) that creates localized regions of enhanced refrigerant flow and heat transfer. This local modification improves thermal energy transfer efficiency in critical areas without changing the overall condenser design, maintaining compatibility with environmentally-friendly refrigerants while addressing efficiency losses.
Solution Approach 2:
The patent introduces a diffusion area defined by a cavity volume within the condenser shell, adding a three-dimensional spatial dimension to heat transfer enhancement. This volumetric approach, rather than relying solely on surface area, improves thermal energy transfer by creating complex flow patterns throughout the refrigerant path.
2Loss of energy
If more tubes are added to the condenser, then heat transfer area increases, but device complexity and manufacturing cost increase
Solution Approach 1:
Instead of uniformly increasing the number of tubes throughout the condenser, the invention creates localized diffusion areas with specific cavity geometries that concentrate heat transfer enhancement in regions where it is most needed. This approach achieves improved heat transfer efficiency without proportionally increasing the total number of tubes.
Solution Approach 2:
The condenser design combines traditional tube structures with diffusion area cavities to create a composite heat transfer system. This hybrid approach integrates conventional tube-based heat transfer with volume-based diffusion enhancement, achieving superior heat transfer efficiency without linearly increasing tube count.
3Loss of energy
If tube density is increased, then heat transfer efficiency improves, but vibration of tubes increases
Solution Approach 1:
The diffusion area design creates localized regions with specific geometric properties that enhance heat transfer while the tube plate provides targeted structural support. This localized approach to both heat transfer enhancement and vibration control allows high tube density in critical areas without excessive vibration throughout the entire condenser.
Solution Approach 2:
The tube plate serves as an intermediary structural element between the refrigerant flow and the tubes. It provides mechanical support and vibration damping while allowing the diffusion area to maintain its heat transfer enhancement function, effectively decoupling the heat transfer efficiency from vibration problems.
4Loss of energy
If condenser efficiency is increased, then operating costs decrease, but initial manufacturing cost increases
Solution Approach 1:
The diffusion area with its specific cavity geometry provides targeted heat transfer enhancement in critical regions, achieving significant efficiency improvements with relatively simple structural modifications. This localized approach reduces manufacturing complexity compared to comprehensive redesign, lowering initial costs while maintaining operating cost benefits.
Solution Approach 2:
The tube plate serves multiple functions: it provides structural support for vibration reduction, acts as a mounting surface for tubes, and defines the diffusion area geometry. This multi-functionality reduces the need for additional separate components, simplifying manufacturing and reducing initial costs while maintaining enhanced heat transfer efficiency.
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 increases the efficiency of the condenser, reduces the number of tubes required, lowers operating costs, and minimizes vibrations, thereby enhancing the overall performance and longevity of the system.
Implementation Method 1
a diffusion area configured to enhance thermal energy transfer within the condenser
Implementation Method 2
a diffusion area configured to enhance thermal energy transfer within the condenser
Implementation Method 3
the tube plate is configured to reduce vibrations of the at least one tube of the plurality of tubes
Implementation Method 4
a condenser disposed downstream of the compressor along the refrigerant loop
Implementation Method 5
a passage lane configured to enhance thermal energy transfer within the condenser
Data Source
AI summary
Embodiments of the present disclosure relate to a vapor compression system that includes a refrigerant loop, a compressor disposed along the refrigerant loop and configured to circulate refrigerant through the refrigerant loop, a condenser disposed downstream of the compressor along the refrigerant loop, where the condenser includes a plurality of tubes disposed in a shell and a diffusion area configured to enhance thermal energy transfer within the condenser, where the diffusion area is defined by a cavity of the condenser without a tube of the plurality of tubes, and an evaporator disposed downstream of the condenser along the refrigerant loop.