Dearman Technology Applications

Every Dearman technology application is fuelled by Liquid nitrogen (or liquid air). Kept at -196℃  – 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. Importantly, the only emission from the Dearman engine is air or nitrogen, with no emissions of NOx, COor particulates.

Kept at -196℃
Expands 710 times

Dearman Projects

The Dearman Engine

The Dearman Engine

At the heart of our technology portfolio is the Dearman engine, a novel piston engine powered by liquid nitrogen – that generates both cold and power from a single tank of ‘fuel’.

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Dearman Hubbard Transport Refrigeration

Dearman Hubbard Transport Refrigeration

Dearman Hubbard Transport Refrigeration is the first to meet all environmental challenges – and set new industry performance standards – all without having to compromise on cost.

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The Dearman Built Environment

Dearman Built Environment

Dearman is developing a genset, which will perform the same functions as a diesel system, reduce energy costs and provide reserve services to the grid.

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The Dearman Heat Hybrid

Dearman Heat Hybrid

Dearman technology is capable of offering a unique combination of heat recovery and hybrid power, delivering similar levels of fuel savings resulting in a comparatively rapid payback.

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Dearman Engine Generation 2.3

In each of these projects, 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 – storing cold and power energy

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

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