Phximiev
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Dearman

Wed Jun 22, 2016 9:26 am

This appears to be an innovative approach to reducing a carbon footprint for a specialized industry. The optimism factor gets a +.

https://youtu.be/AMRIkYdjjf8

http://dearman.co.uk

http://dearman.co.uk/dearman-technologi ... an-engine/

http://dearman.co.uk/sainsburys-is-worl ... en-engine/
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ed5000
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Re: Dearman

Thu Jun 23, 2016 10:49 pm

So what's this Dearman engine? They say something about being an nitrogen expander engine with water to transfer heat to the nitrogen?
I know that they have cooled trailers with a bottle of nitrogen and a regulator and slowly released the nitrogen directly in the traIler until the nitrogen is gone. Sounds similar but without all the moving parts. :lol:
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PV1
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Re: Dearman

Fri Jun 24, 2016 7:49 am

This sounds like it would make perfect sense for refrigerated trucks. Run liquid nitrogen through this engine, which both can generate electricity and provide cooling to the cargo. The electricity generated helps to extend the range of an electric drive system, rather than having electric drive with a conventional AC reducing range, or having two diesel engines running as it is done now in the US.

I wonder how much energy is required to compress and cool nitrogen into a liquid, and what you get back out of that same amount of nitrogen. Unlike natural gas or Hydrogen, nitrogen is readily available, inert, and abundant in pure form in the atmosphere (air is made up of just over 78% N2) and doesn't need to be split from another molecule or drilled for.
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Phximiev
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Re: Dearman

Fri Jun 24, 2016 8:37 am

From the videos and discussions on the site, it looks like they believe that this affair is both cost justifiable, addressed to a large market, that of cooling perishables in transport, and green. Their test of the process should provide some interesting reading.

This is why I posted it. Although, there is something intriguingly British about it :!: :D

With yesterday's Brexit, it should be interesting to see how they market it in the EU. :shock:
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Phximiev
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Re: Dearman

Fri Jul 01, 2016 8:22 am

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phb10186
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Re: Dearman

Fri Jul 01, 2016 3:22 pm

I assume the compressor is driven by expanding liquefied gas and blown in to the atmosphere as an exhaust. Could solve a problem that exists well if they prove to be reliable.

Haulage is a pretty diesel hungry business.
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Phximiev
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Re: Dearman

Fri Jul 01, 2016 3:55 pm

The second link above in the first post does say that the nitrogen or air is exhausted into the atmosphere.

I think that it could catch on since it appears that the economics and "green" issues may be satisfied. At some point, they would have to have a fairly well-trained maintenance organization as well as a source for compressed/liquid nitrogen.

Both ought to be do-able.
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Phximiev
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Re: Dearman

Fri Sep 30, 2016 3:49 pm

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JoeS
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Re: Dearman

Fri Sep 30, 2016 4:58 pm

Phximiev wrote:Dearman gets money!...
"...Clean cold specialist Dearman has won £6m in government grant funding to support the development of its zero-emission engine fuelled by liquid nitrogen...."

Um, Nitrogen? :roll:
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Phximiev
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Re: Dearman

Tue Mar 21, 2017 10:46 am

Progress continues apparently:

https://youtu.be/NlQMceDmy0A
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