Railcar Chassis Power Unit for Refrigerated Cargo Containers
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Solution Overview
Problem
Current cargo container refrigeration systems face challenges such as reduced cargo volume, increased fuel consumption, environmental emissions, and time-consuming unit installation and removal when transporting perishable items, particularly when transitioning between maritime and drayage transport modes.
Innovation Solution
A railcar chassis with a storage portion for cargo containers, equipped with at least one power unit that includes a hydrogen fuel storage cylinder and a detachable power generator or a battery, providing electrical power to the refrigeration unit, allowing for efficient and autonomous cooling without the need for additional power sources on the cargo container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling unit is installed on the cargo container to maintain low temperature, then the refrigeration function is improved, but the volume of the cargo container is reduced
Solution Approach 1:
The power generator is extracted from the cargo container and relocated to the prime mover of the transport means. This separation allows the cargo container to be freed from the burden of carrying its own power generation equipment, thereby maximizing cargo volume while maintaining refrigeration capability through external power supply.
2Temperature
If power is drawn from the prime mover of the transport means to power the refrigeration unit, then the refrigeration function is maintained, but the fuel consumption of the prime mover increases
Solution Approach 1:
The power generator on the prime mover serves multiple functions: it powers both the transport means and the refrigeration unit simultaneously. This multi-functionality allows the system to share the power generation capacity, reducing the need for separate dedicated power sources and thereby lowering overall fuel consumption compared to using independent generators on each cargo container.
3Reliability
If the cargo container is designed to cool perishable items independently when not connected to maritime or rail power, then the autonomy is improved, but the weight and volume of the cargo container increase
Solution Approach 1:
Instead of designing cargo containers with full independent power generation capacity, the system uses a partial approach by relying on external power from the prime mover during transport. The container only carries minimal refrigeration equipment without a dedicated generator, achieving sufficient cooling reliability through the shared power system while avoiding the excessive weight of self-contained power generation equipment.
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 enhances cargo volume, reduces environmental impact, and streamlines the transition between transport modes by providing continuous refrigeration power, minimizing fuel consumption and emissions, and reducing installation time for refrigeration units.
Implementation Method 1
a first power unit having a storage cylinder configured to store hydrogen fuel
Implementation Method 2
a power generator detachably installed on the cargo container and coupled to the storage cylinder to receive the hydrogen fuel for generating a first predefined amount of electrical power
Implementation Method 3
a refrigeration unit to maintain a low temperature inside the cargo container
Data Source
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AI summary
A railcar chassis (402) for transporting a cargo container (420) is disclosed. The railcar chassis (402) includes a storage portion (406) configured to receive the cargo container (420) having a refrigeration unit (408). The railcar chassis (402) also includes at least one power unit (404) positioned proximate to the storage portion (406) and configured to provide electrical power to the refrigeration unit (408).