Evaporators: Efficient Conversion of Cryogenic Liquids to Medical Gas

Evaporators are essential components in cryogenic medical gas systems. They are used in combination with liquid oxygen tanks (LOX) to convert stored liquid oxygen into a usable gaseous form suitable for hospital oxygen networks.

Tecnomed Evaporators are designed to ensure stable, efficient evaporation by harnessing environmental heat and using materials optimized for cryogenic performance.

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Working Principle of Evaporators

The function of Evaporators is to evaporate the liquefied gas flowing from the cryogenic tank by exposing it to ambient heat. As the cryogenic liquid passes through the aluminum-based structure of the evaporator, it absorbs heat from the surrounding air, causing it to change from liquid to gas form.

This physical phase change is achieved without any external energy source such as electricity or fuel — the system relies solely on atmospheric heat for the conversion process.

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Cryogenic Compatibility and Construction

Tecnomed Evaporators are made using materials specifically suited for cryogenic applications. The components include:

• 5000 or 6000 series aluminum finned pipes

• Cryogenic aluminum pipes

• Aluminum box profiles

These materials offer exceptional thermal conductivity and structural resistance under extreme low temperatures, ensuring safe and effective operation over long periods.

The use of aluminum finned surfaces increases the surface area for heat exchange, accelerating the evaporation process and ensuring consistent gas output even under high-demand scenarios.

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Integration with LOX Systems

Evaporators are mounted directly between the liquid oxygen tank and the gas distribution pipeline. As the LOX exits the tank, it flows into the evaporator unit, where it undergoes a natural vaporization process before entering the hospital’s oxygen supply line.

This configuration is common in:

• Large public hospitals

• Private clinics

• Mobile or containerized oxygen systems

• Emergency oxygen storage systems

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Maintenance-Free Operation

One of the key benefits of using atmospheric Evaporators is that they require no power source, moving parts, or complex controls. As a result, they offer silent, maintenance-free operation and can function continuously with minimal intervention.

This reliability is crucial in healthcare environments where uninterrupted oxygen supply is critical to patient safety.

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Material Advantage

Aluminum offers several advantages for cryogenic use:

• Lightweight and corrosion-resistant

• High thermal conductivity for rapid heat absorption

• Resistant to deformation under low temperatures

Using aluminum alloys from the 5000 and 6000 series ensures long-term durability and performance under cryogenic stress.

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Key Features of Tecnomed Evaporators

• Designed for use with LOX tanks

• Converts cryogenic liquid to gaseous oxygen

• Made from 5000 / 6000 series aluminum finned pipes

• Uses ambient air for natural vaporization

• No electricity or moving parts required

• Silent and maintenance-free operation

• Compatible with hospital oxygen distribution networks

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Conclusion

Tecnomed’s Evaporators provide a safe, reliable, and energy-efficient solution for converting liquid oxygen into medical gas. Built from cryogenic-grade aluminum and designed for atmospheric operation, they support hospitals and medical centers with uninterrupted gas supply.

Whether for fixed installations or mobile units, these evaporators guarantee performance without complexity, making them an ideal choice for modern cryogenic systems.