Micro Cogeneration domestic

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sebabonnet
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Micro-cogeneration and Ericsson engine




by sebabonnet » 26/02/07, 14:08

Hello,

I just ran into your forum by researching the Ericsson engine.
I therefore allow myself to post a message on this forum because I did a thesis on internal combustion heat engines, Stirling and Ericsson engines.
On the Stirling engine, I made temperature and pressure measurements, completely original measurements. I also performed a modeling of this engine.
The other part of my doctorate consisted in designing a micro-cogeneration system based on an Ericsson engine. Sizing has been carried out and a prototype is being produced.
Indeed, the Ericsson engine has multiple advantages compared to the Stirling engine but it is more complex.
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Micro-cogeneration and Ericsson engine




by fbedon » 17/03/07, 14:09

Hello,
I read your thesis well and you praised it as much for its interest as for the ease of finding it online:
http://tel.archives-ouvertes.fr/docs/00 ... /These.pdf

I have a few questions:
- Why not directly use the fumes from the boiler and go through an exchanger?
- Have you started making an installation of this kind?
- have you seen anything like it?

I'm thinking to mount a wood boiler, pressurized boiler by a compressor to be defined (I recovered a positive displacement compressor on an agricultural machine)
and where the hot gases would be turbinated in a 2.2l Reault petrol engine block modified at the distribution level to work on a 2-stroke cycle.

The goal is to obtain mechanical power (electricity or geothermal) associated with hot water production (heating)

to your comments and suggestions.
Fred
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Cogeneration based on Cycle Ericsson




by fbedon » 17/03/07, 19:27

Hello,
or are you none of your idea?
I assume that the valve run-in solved we must think of the rest ...
What about the boiler, compressor, exchangers, you already have things to show?
Fred
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by Capt_Maloche » 18/03/07, 06:37

Superb job this thesis, I would read it at rest to assimilate everything

Regarding the Stirling, a manufacturer already offers a boiler with cogeneration:

https://www.econologie.info/share/partag ... irling.jpg

Microgen is the company that produces the device: http://www.microgen.com/Product.asp

I already asked them for info, prices, technical specifications, but they sold the exclusivity to this boiler manufacturer; you must therefore go through DE-Dietrich to order one

their generator provides 1,1KW 240V 50Hz; Their efficiency is around 20%, or 5KW hot converted into 1,1 KW electric; the temperature of the burnt gases from the boiler would be around 110 ° C.
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by the middle » 18/03/07, 08:47

Capt_Maloche wrote:Superb job this thesis, I would read it at rest to assimilate everything

Regarding the Stirling, a manufacturer already offers a boiler with cogeneration:

https://www.econologie.info/share/partag ... irling.jpg

Microgen is the company that produces the device: http://www.microgen.com/Product.asp

I already asked them for info, prices, technical specifications, but they sold the exclusivity to this boiler manufacturer; you must therefore go through DE-Dietrich to order one

their generator provides 1,1KW 240V 50Hz; Their efficiency is around 20%, or 5KW hot converted into 1,1 KW electric; the temperature of the burnt gases from the boiler would be around 110 ° C.

It would be nice to have a little Stirling, to put on André's ball burner .... But ... or find one? : Shock:
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by Capt_Maloche » 18/03/07, 11:05

At the manufacturer DE DIETRICH, spare parts are compulsory available

http://www.dedietrich-thermique.fr/

and at all distributors of heating equipment
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by Obelix » 18/03/07, 15:11

Hello,

Another good address too:

http://ecolib.free.fr/textes/energie/Sterling.html

good reading
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Re: Micro-cogeneration and Ericsson engine




by sebabonnet » 02/05/07, 15:53

On my thesis, there is a part which relates to the recirculation of smoke. This saves the heating of part of the outside air.

A prototype of this system is being manufactured and has just been labeled by EADS for the recycling of aircraft.

Otherwise, for my part, I am modifying a twin-cylinder V compressor to transform it into an Ericsson engine.
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Micro-cogeneration and Ericsson engine




by fbedon » 02/05/07, 20:32

Hi,
1 Flue gas recirculation, yes I understand the interest, but why not directly turbine the fumes from the boiler?

2 I am gathering the materials necessary to make an Ericsson engine with a biomass boiler (wood, chips, waste ...), I think to use a good old petrol engine block for the 'engine' part (after modification of its distribution of course) For the compressor part I am looking for, I must test a large volumetric compressor of a 2-stroke diesel engine of an agricultural machine, but on the 2-stroke I think that this compressor ensures only the circulation of gases and not supercharging .... Otherwise an alternative compressor will do the trick.

3 Can we know more about your prototype?

Fred from Grenoble
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by I Citro » 03/05/07, 23:07

8) Keep a news concerning domestic microcogeneration.
It is a wood boiler equipped with a stirling engine.
https://www.econologie.com/forums/moteurs-st ... t5703.html

Retail review

*
The company Sunmachine from Nuremberg has developed a 520 cm3 Stirling single cylinder under 33 bar which displays a power of 3 electric kW (measured power with a gas burner). This engine was re-equipped with a downward-down flame burner. The manufacturer announces an electrical yield of 20 at 25% and thermal up to 70%. Its price HT should be located towards 23.500 €.
*
The Austrian boiler manufacturer Mawera is working on a prototype equipped with a Stirling 4 engine double action cylinders: the exhaust gases leave the combustion chamber at a temperature close to 1 300 ° C; for this, the combustion air is preheated with part of the exhaust gas. This system displays a nominal electrical power of 35 kW for a heating system return temperature of 60 ° C. The manufacturer announces an electrical efficiency between 12 and 18%. Two trial installations combine 16 000 hours of walking.
*
The Stirling engine of the Austrian Stirling Power Module at 4 dual action cylinders develops an electric power of 1 kW, and its burner 15 thermal kW. This engine, developed specifically for wood fuel, will be sold as a module and can be adapted to work with the burner of different manufacturers. The first tests in real conditions should begin in 2007 in association with the Austrian manufacturer of pellet boilers KWB. The Fraunhofer ISE is working on the design of this system with a high-performance hot water tank.
*
Lichtenstein's Hoval is working on the integration of a Stirling engine from 1 kWel with its pellet boilers and its wood gasifier. The company will not market it before 2008.
*
the German Solo Stirling adapts its engine with a capacity of 9 kWel - a measurement performed with a natural gas burner - to work with a pellet gasifier. The engine will be heated by very hot exhaust gases. This combination will not be offered before 2007.
*
German boiler manufacturer OTAG is adapting its system based on a Lion steam engine with a capacity of 0.2 to 3 kWel (with a natural gas burner of variable power from 2 to 16 kWth) to work with a pellet burner . Marketing on 2007.

I can not insert the image of the machine in the post ... : Cry:
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