Dearman Technologies 2017-07-18T10:18:37+00:00

Dearman Technologies

Liquid nitrogen (or liquid air) is kept at minus 196C – warm it even a few degrees and it becomes a gas, expanding 710 times in volume. The pressure from this expansion can drive a piston and deliver not only power, but also cooling. It only exhausts clean air back to the atmosphere.

This process is at the core of the technologies Dearman is developing, which can be applied in a range of applications –

Kept at minus -196C
Expands 710 times
Dearman Engine Generation 2.3

In each of these applications, Dearman technologies deliver:

  • savings on fuel and operating costs
  • immediate improvements in local air quality
  • quick pay-back (a few months to a year)

Dearman has further products in the pipeline, which have mainstream markets in multiple geographies, and can make a robust business case without subsidy or policy change or legislation.

Liquid air – a novel energy vector storing cold and power

When people talk about energy storage they usually mean electro-chemical batteries. But when the service required is cooling, and especially when ambient temperatures are high, it is often more effective to store energy as cold. Liquid air is a powerful new energy vector to provide distributed clean cold and power in vehicles and buildings.

Liquid air is not yet produced commercially, but liquid nitrogen, which can be used in the same way, is produced throughout the industrialised economies. Historically nitrogen has been used simply as an industrial gas, but now it is being re-purposed as a means of converting renewable and off-peak energy into storable, transportable cold and power.

Liquid air or nitrogen can be kept safely in insulated but unpressurised tanks, and when exposed to heat will instantly re-gasify and expand 700-fold in volume. When channelled through a Dearman engine, this process generates both cooling and mechanical power for a wide range of applications.

Because liquid air is simply air that has been cooled to -196°C, it also provides a convenient and effective way to capture and recycle the huge amounts of cold energy that are typically wasted during the re-gasification of LNG at import terminals.

Harnessing liquid air

How liquid air is made

Dearman Technology Applications

Transport Refrigeration

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Built Environment

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Auxiliary Power Unit

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Heat Hybrid

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