Interlocking Modular PCM Packs for Cargo Container Temperature Control
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Solution Overview
Problem
Current cargo containers for aircraft lack effective temperature control systems that can maintain desired temperature ranges for cargo, especially when the containers are full and access is restricted.
Innovation Solution
A modular, interlocking temperature control system using phase change materials (PCMs) that can be easily inserted and removed from the container via a rail system, allowing for cooling or heating within the container, even when it is full of cargo, by utilizing interlocking packs with PCM that can absorb or release energy at various temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cargo containers are filled to maximum capacity, then transportation efficiency is improved, but access for temperature control system maintenance becomes difficult
Solution Approach 1:
The temperature control system is divided into modular packs that can be independently accessed and replaced. Each pack contains PCM containers that can be individually removed and replaced through the cargo door, allowing maintenance without emptying the container. This segmentation enables full cargo loading while maintaining easy access to temperature control components.
2Ease of repair
If temperature control systems are made removable and replaceable, then ease of maintenance is improved, but system complexity increases
Solution Approach 1:
The system employs dynamic, interchangeable components rather than fixed installations. The PCM containers are designed with engagement features that allow quick attachment and detachment from the temperature control packs. This dynamic design simplifies maintenance operations while the standardized engagement mechanisms keep overall system complexity manageable.
Solution Approach 2:
The temperature control packs are designed as universal, multi-functional units that can be positioned in various locations within the cargo container. The standardized interface allows the same pack design to serve multiple purposes and locations, reducing the need for custom components and thereby managing system complexity while enhancing ease of maintenance.
3Ease of operation
If PCM packs are designed as modular units, then ease of replacement is improved, but manufacturing complexity increases
Solution Approach 1:
The modular pack design segments the temperature control system into standardized units with uniform dimensions and engagement features. This segmentation, while enabling easy replacement, actually simplifies manufacturing through standardization. The repeated use of identical components across multiple packs reduces tooling costs and assembly complexity compared to custom-designed units.
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
Enables efficient temperature control within the cargo container by allowing for the replacement of PCM packs without removing the cargo, maintaining a prescribed temperature range and facilitating cooling or heating as needed.
Implementation Method 1
The PCM can include water and/or a wide variety of organic or inorganic material (solid, liquid, or gaseous materials) that can absorb or release energy at selected temperatures, that change phase at various temperatures in a range of −100° C. to 100° C.
Implementation Method 2
the interlocking packs also can include interlocking features or mechanisms that facilitate interlocking or other suitable connection of adjacent interlocking packs along the rails
Data Source
AI summary
A cargo container includes a plurality of panels, a first set of rales, a first pack, and a second pack. The plurality of panels defines a chamber that has an opening configured for loading and unloading of cargo in the chamber. The plurality of panels includes a first panel with the first set of rails connected to the first panel and disposed within the chamber. The first pack and the second pack are slidably received on the first set of rails and each include a phase-change material (PCM) disposed therein. The first pack and the second pack are interlocked with one another such that the first pack and the second pack slide in concert with one another.