An engine that generates power from fresh air is the ultimate automotive panacea. Tim Deakin looks at the concept. The Dearman Engine is an efficient Rankine-cycle expander powered by waste heat and liquid Nitrogen (LiN) or air (LiAir) • Simple –made from common, recyclable metals and plastics • Cheap –cost similar to ICE • Existing infrastructure –LiN is a commonly used industrial gas Can the Dearman Engine compete in a vehicle powertrain? “Diesel is likely to remain the dominant source of power in buses for a long time. ‘After we realised we could use it for cooling, things just snowballed.”What Dearman’s technology could do for the developing world. Because our engine is made from aluminium, plastic and steel, we can produce it at a fraction of the cost, making it an attractive proposition.â€Payback time for the Dearman engine when used as a heatThe Dearman installation will add a modest amount of weight, he says, but the company is working to recoup that via further efficiency gains.It should ultimately allow downsizing of the diesel power unit, and when air chilling is required it can be provided as a by-product of the Dearman engine’s propulsion function, allowing weight to be removed. In compliance with Organic Law 15/1999, of 13 of December, on Personal Data Protection, and the development of Rules of Procedure, approved by Royal Decree 1720/2007, of 21 of December, Atlas of the Future subscribers may be required to provide Personal Data, which will be included in a file owned by Democratising The Future Society SL. Subscribers may exercise, at any time, their rights of access, rectification, cancellation and/or opposition regarding their Personal Data. Imagine farms where liquid air systems provide power and cold at the same time, running, for example, a refrigerated conveyor belt for fruit processing. It communicates with both engines’ individual ECUs to demand torque, but Mr Ayres does not rule out the future possibility of one ECU governing both engines to give further efficiency gains.“What we’re trying to do is push the diesel engine into the background as much as possible while allowing operation within its most efficient range,†he says. The resulting air or nitrogen in gas form is vented to atmosphere.Maintenance requirements are the same as for a diesel engine. In doing so, he unleashed a coming revolution that has the potential to save millions of lives. I’ve stumbled upon this site Dearman Engine and it seems that this clever adaptation of a combustion engine may be economically viable. For example, for a freezer to reach -22°C a traditional diesel unit will take 90 minutes, whereas the Dearman engine can reach that in less than half an hour. He has written for Radio 4, the Times, Sunday Times, Wall Street Journal, Telegraph, Guardian and New Statesman, and is the author of the critically acclaimed An Optimist’s Tour of the Future. Indeed, the shed is still there, in As they should be – because, early in 2000, Peter solved a problem whose solution had evaded the engineering world for a century. The UK’s bus manufacturers […]
Every product tells a story. But our intuition is misleading.
In other scenarios, saloon cooling can be provided at no cost.In heat hybrid application, which will prove most attractive to UK operators, the Dearman engine is a four-cylinder unit developing around 20kW per litre of displacement. The effciency of the engine leapt. Global technology firm Dearman, backed by public body Innovate UK and in partnership with Air Products and the MIRA proving ground, is in the process of unveiling something which may change that.There is plenty of heat for the simple Dearman engine to recover and put to good use. Two objects of different temperatures brought into contact will exchange energy (as they try to get to the same temperature) even if those temperatures are both below freezing point – and if you piggy-back on that exchange you can do useful work.Peter, of course, wasn’t the first person to realise this, but he did become the first person, many years later, to use the concept to create a machine that could help to save millions of lives by changing the way our food system works – ‘Dearman Engines work on exactly the same principles as a steam engine, except they’re powered not by steam (water gas) but by another gas, which, when you first hear about it, seems to make no sense at all.
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