Portable hydrogen HVAC enables off-grid cooling

Against the backdrop of global carbon neutrality goals and the ongoing energy transition, energy autonomy in buildings and industrial sectors is emerging as a critical trend. Among all systems, heating, ventilation, and air conditioning (HVAC) stands out as a major energy consumer, making transformation in its energy supply model particularly important.

Using hydrogen to power heating and cooling is not just a technological upgrade—it represents a fundamental rethinking of energy logic.
According to a report from The Business Research Company, the HVAC market is projected to grow from USD 1.58 billion in 2024 to USD 1.91 billion in 2025, reaching USD 4.87 billion by 2030, with a compound annual growth rate (CAGR) of 20.5%. This rapid growth is driven by two defining trends: the widespread adoption of renewable energy and the urgent demand for decentralized, flexible, and low-carbon energy solutions.
 

Decoupling HVAC from the Grid

In building energy consumption, HVAC systems often account for the largest share. The introduction of hydrogen energy is reshaping this landscape. Traditionally, HVAC systems have been tightly bound to the electrical grid. However, hydrogen-powered portable HVAC solutions are turning the concept of “mobile cooling and heating” into reality.
There are two main technical pathways:

• Hydrogen fuel cells, which convert hydrogen into electricity through electrochemical reactions to power compressors and fans
• Hydrogen combustion, which directly uses hydrogen as a heat source

Compared to conventional diesel generator-driven systems, hydrogen-powered HVAC can achieve near-zero carbon emissions.

This enables reliable heating and cooling in construction sites, outdoor events, and emergency response scenarios—without reliance on long power cables or fossil fuels—significantly enhancing energy independence.
 

Technology Enablement: Three Pillars for Stable, Efficient, and Intelligent Hydrogen HVAC

Achieving stable, efficient, and compact hydrogen-powered HVAC systems requires complex underlying technologies. Several key breakthroughs stand out:
 

1. Wide-Bandgap Semiconductors: The Foundation of High-Efficiency Conversion

Hydrogen fuel cells generate direct current (DC), while HVAC compressors and fans typically operate on alternating current (AC). The efficiency of power conversion directly determines system runtime.

Wide-bandgap semiconductors such as silicon carbide (SiC) and gallium nitride (GaN) are becoming essential in this stage. Compared to traditional silicon devices, they offer:

• Lower switching losses
• Higher voltage tolerance
• Improved thermal performance
• Higher energy conversion efficiency

Selecting the right wide-bandgap components and optimizing thermal design are critical for long-term reliability. Avnet not only provides leading-edge components from suppliers such as Infineon, but also leverages extensive application expertise to support optimized topology design and thermal management.
 

2. High-Density Isolated Power Supply: Balancing Safety and Compactness

In hydrogen-powered HVAC systems, ensuring electrical isolation while maintaining high power density is a key challenge.

For example, Infineon’s CoolSET™ system-in-package (SiP) solution integrates:

• 800V CoolMOS™ switching devices
• Zero-voltage switching (ZVS) primary controller
• Secondary-side synchronous rectification controller

All within a compact SMD package, with isolation communication enabled through CT Link technology.

The adoption of ZVS flyback topology significantly reduces switching losses and improves electromagnetic interference (EMI) performance. It enables up to 60W output power in a compact design with efficiency exceeding 94%.
 

3. Intelligent Sensing and Control: The “Brain” of Demand-Driven Energy

One of the core advantages of portable HVAC systems is on-demand energy delivery—cooling or heating follows the user.

Traditional infrared sensors often fail in high-temperature or static conditions, leading to energy inefficiencies.

By contrast, 60GHz millimeter-wave radar sensors provide a superior solution. For instance, Infineon’s XENSIV™ series features:

• Integrated hardware accelerators
• Autonomous operation capability
• High-precision detection of motion, presence, and even micro-movements
• Ultra-low power consumption

In hydrogen-powered HVAC applications, these sensors enable the system to automatically reduce output when no one is present, ensuring that limited hydrogen resources are used efficiently and extending system runtime.

All of these technologies are fundamentally built on power semiconductors and intelligent sensing.

• Wide-bandgap devices ensure efficient power conversion and distribution, maximizing the energy output of hydrogen fuel cells
• Radar sensors combined with AI algorithms enable the system to perceive and predict—not only responding to current temperature changes but also anticipating environmental trends and adjusting operation proactively
   

Beyond Power Source Switching: A System-Level Transformation

The advancement of hydrogen-powered portable HVAC is not the result of a single technological breakthrough, but rather the integration of:

• Power semiconductors
• Intelligent sensing
• Control architectures
• Thermal management
• System-level design

Through close collaboration with global technology leaders such as Infineon, Avnet brings together wide-bandgap power devices, high-density isolated power solutions, and intelligent radar sensors—translating advanced industrial technologies into reliable, scalable, and cost-effective solutions tailored for hydrogen HVAC applications.

When these technologies are seamlessly integrated into a mobile system, heating and cooling are no longer constrained by power cables—unlocking true freedom in energy usage.