Galley refrigeration system
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Solution Overview
Problem
Conventional aircraft galley refrigeration systems require significant space for airflow supply and return components, leading to higher heat gain and lower efficiency, and are custom-designed for each aircraft, resulting in increased design, installation, and operational costs due to lack of standardization.
Innovation Solution
A galley refrigeration system with a compact heat exchanger positioned within the galley compartment, featuring detachable air supply and return ducts with electronically actuated valves for variable airflow control, allowing for efficient cooling of galley carts and reducing system complexity and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional galley refrigeration systems use large ducts and valves for airflow supply and return, then cooling coverage is improved, but system size and heat gain increase
Solution Approach 1:
The system divides the galley compartment into multiple zones with individual cooling units, each serving a specific cart or cart group. This segmentation allows targeted cooling with smaller ducts and valves for each zone, reducing overall system size while maintaining adequate cooling coverage across the entire galley compartment.
Solution Approach 2:
The patent transitions from traditional horizontal duct routing along the rear wall to a vertical arrangement where the heat exchanger is positioned above the galley compartment and ducts extend downward. This dimensional change reduces the horizontal space required for ductwork and allows more compact system configuration.
2Object-affected harmful factors
If heat exchangers are installed outside the galley, then noise and size issues are addressed, but installation complexity and costs increase
Solution Approach 1:
The heat exchanger is nested within the galley compartment structure, specifically positioned above the compartment and integrated with the aircraft's existing environmental control system ducting. This nesting approach allows the heat exchanger to be housed within the galley's structural space, reducing noise transmission to the cabin while avoiding the need for separate external installations.
Solution Approach 2:
The system is designed to interface with the aircraft's existing environmental control system ducting, allowing the galley refrigeration system to utilize the aircraft's already-installed air supply and return pathways. This multi-functionality reduces installation complexity by leveraging existing infrastructure rather than requiring completely separate ductwork.
3Adaptability or versatility
If conventional systems are custom-designed for each aircraft, then specific technical requirements are met, but design and operational costs increase
Solution Approach 1:
The patent employs standardized heat exchanger units and duct components that can be universally applied across different aircraft types. The modular design allows the same basic components to be configured for various galley sizes and aircraft models, reducing design costs through standardization while maintaining adaptability to specific technical requirements through flexible installation arrangements.
Solution Approach 2:
The system incorporates adjustable and configurable elements that allow adaptation to different aircraft configurations without requiring custom-designed components. The modular architecture enables dynamic reconfiguration of the system to match various galley compartment dimensions and cooling requirements, reducing the need for expensive custom manufacturing.
4Power
If large ducts and components are used for airflow, then cooling capacity is improved, but energy efficiency decreases
Solution Approach 1:
By dividing the cooling system into multiple smaller zones with individual cooling units, each zone requires less airflow capacity, allowing the use of smaller, more energy-efficient ducts and fans. The segmented approach maintains adequate cooling capacity for each zone while reducing the total energy consumption compared to a single large-system approach.
Solution Approach 2:
The vertical positioning of the heat exchanger above the galley compartment and the downward extension of ducts reduces the length and surface area of ductwork required. This dimensional reconfiguration minimizes heat gain through duct walls and reduces the energy required to move air through the system, improving overall energy efficiency while maintaining cooling capacity.
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 energy consumption, minimizes heat gain, and allows for standardized installation across different aircraft, decreasing costs and improving thermal efficiency while maintaining effective cooling performance.
Implementation Method 1
a heat exchanger configured to generate cooling air
Implementation Method 2
an air supply duct provided at the cart-facing opening in the vertically intermediate region of the back wall, configured to guide the cooling air from the heat exchanger into the galley cart
Implementation Method 3
the docking interface comprising an electronically actuated valve for controlling a variable flow rate of the cooling air from the air supply duct into the galley cart
Data Source
AI summary
A galley refrigeration system is provided in which a galley cart is positioned in the cavity of a galley compartment comprising at least a cart-facing opening positioned in a vertically intermediate region of the back wall, the galley cart or the galley compartment having a duct-facing opening positioned adjacent to the cart-facing opening. A heat exchanger configured to generate cooling air is provided within the galley compartment, adjacent the vertically intermediate region of the back wall of the galley compartment defining the cavity. An air supply duct, provided at the cart-facing opening, is configured to guide the cooling air from the heat exchanger into the galley cart, and configured to be detachably coupled to the duct-facing opening of the cart or the galley compartment. An electronically actuated valve controls a variable flow rate of the cooling air from the air supply duct into the galley cart.