Hydrogen Fuel Cell TRU Control for Low-Emission Cold Chain Cooling
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Solution Overview
Problem
Current transportation refrigeration units (TRUs) primarily rely on diesel technology, contributing to carbon emissions, noise pollution, and other pollutants, while battery electric solutions are limited by scope, weight, and charging time, failing to meet the growing demand for efficient, low-emission refrigeration systems.
Innovation Solution
Integrating hydrogen fuel cell subsystems with vapor-compression refrigeration systems and intelligent control systems to create a Transportation Refrigeration Unit (TRU) that operates efficiently with low to no CO2 emissions, reduced noise, and fast charging, utilizing hydrogen and renewable energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If diesel technology is used in TRUs, then refrigeration performance is maintained, but carbon emissions and noise pollution increase
Solution Approach 1:
The patent combines hydrogen fuel cell technology with vapor-compression refrigeration systems to create a hybrid TRU. The fuel cell generates electricity to power the refrigeration compressor and auxiliary systems, while hydrogen storage tanks provide fuel. This merging allows the system to maintain refrigeration performance while eliminating diesel emissions.
Solution Approach 2:
The patent replaces the diesel mechanical engine system with an electrochemical fuel cell system. Instead of using a diesel engine to drive the refrigeration compressor directly, the system uses electricity generated by the hydrogen fuel cell to power an electric motor-compressor, thereby eliminating combustion emissions and noise.
2Object-affected harmful factors
If battery electric solutions are used in TRUs, then emissions are reduced, but system weight and charging time increase
Solution Approach 1:
The patent changes the energy storage parameter from heavy battery electric systems to lightweight hydrogen storage tanks. By storing hydrogen gas at high pressure (350-700 bar) instead of storing large amounts of battery energy, the system achieves comparable operational duration with significantly reduced weight.
Solution Approach 2:
The patent implements periodic refueling operations with hydrogen tanks, which can be quickly refilled at hydrogen stations, replacing the continuous charging requirement of battery systems. This periodic action reduces the need for large battery capacity and associated weight.
3Object-affected harmful factors
If hydrogen fuel cell subsystems are integrated with refrigeration systems, then CO2 emissions are reduced, but system complexity increases
Solution Approach 1:
The patent designs the hydrogen fuel cell system to serve multiple functions: generating electricity for the refrigeration compressor, providing heated air for cargo space heating, and producing water as a byproduct that can be used for humidification. This multi-functionality reduces the need for separate systems and simplifies the overall architecture despite the integration of fuel cell technology.
Solution Approach 2:
The patent merges the fuel cell power generation system with the refrigeration and climate control systems into a single integrated TRU platform. The electrical output from the fuel cell directly powers the refrigeration compressor, and the thermal output is utilized for heating, creating a unified system that manages both cooling and heating needs.
4Use of energy by moving object
If intelligent control systems are implemented, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements an intelligent control system with sensors that continuously monitor refrigeration load, ambient temperature, cargo space conditions, and fuel cell performance. This feedback information is processed by a control algorithm that dynamically adjusts the fuel cell power output and refrigeration compressor speed to optimize energy efficiency while maintaining required temperature conditions.
Solution Approach 2:
The patent uses the intelligent control system to predict future refrigeration needs based on ambient temperature forecasts, cargo type, and route information. The system pre-adjusts the fuel cell operation and refrigeration capacity in advance of peak cooling demands, optimizing energy usage and preventing temperature excursions.
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
The TRU achieves low emissions, reduced noise, and increased efficiency by anticipating cooling needs, optimizing energy use, and synergizing subsystems, supporting CO2 reduction and enhancing hydrogen infrastructure.
Implementation Method 1
hydrogen fuel cell subsystems (FCs)
Implementation Method 2
vapor-compression refrigeration subsystems (Refri.)
Data Source
AI summary
A hydrogen-powered refrigeration system 900 and related intelligent and predictive control methods, comprises various subsystems integrated to create synergies and interdependencies providing high efficiency, mission anticipation and recommendations to minimize fuel consumption and increase the durability of the system while refrigerating a cargo volume during transportation at low or no carbon emissions; wherein the intelligent and predictive controls are achieved by the use of a control system based on deep neural networks that optimizes operation by anticipating the future state of the system and adjusting its configuration based on models to operate under an optimal control policy that considers external information obtained from calls to APIs linked to external information providers while ensuring cargo is maintained under conditions required or regulated as a part of the cold chain. The invention has particular application to the vehicular and multi-modal transportation of items requiring refrigeration.