A simple but efficient Diesel burner?

[Inventus]

Hi,

I'm looking into making a simple steam-engine. For that purpose I need a Diesel burner which should be as efficient as possible, both with regard to oil-consumption and pollution, which I guess is to say that it should provide as complete and stoichiometric a combustion of the oil as possible, while remaining reasonably simple to construct and maintain. Also, it shouldn't be too difficult or complicated to ignite, as this intended to be done automatically (preferably without a load of control-electronics or similar complexities). If at all possible, I would also like to be able to regulate the burner, so as to regulate the steam-production (which will vary between "full" and "nothing" over short periods of time).

Ideally the combustion should take place at near-atmospheric pressure. I expect to use a blower to provide the necessary airflow, but would rather avoid a pressurized combustion chamber (although, if this is a great advantage, I will certainly consider it). Also keep in mind that the heat needs to be transferred to the water/steam in the boiler in an efficient manner, which might put some restraints on both the design and the flame-temperature of the burner. Finally the whole engine have to be rather compact, so a likewise compact burner design is preferable.

Any input on how such a burner could be constructed, and/or where such a device might be purchased (or scavenged) would be appreciated.


Thanks in advance,

Inventus.

 

[vadslram]

Home heating oil furnace?!
Heating oil is only a slightly different fraction of the same base and manufacturers have been working for years to make them more efficient.
The combustion chamber doesn't need pressure but the fuel needs to be as finely divided as possible for complete combustion so with the heavier stock (kero, diesel, jp5 etc) that means high pressure nozzles.

 

[ravenprp]

Thank you for your inquiry. A simple but efficient Diesel burner can be achieved by using a simple design and following some key principles. Here are some suggestions:

1. Use a pre-mixed design: A pre-mixed design involves mixing the fuel and air before it enters the combustion chamber, resulting in a more complete and efficient combustion. This can also help reduce pollution as it allows for better control of the air-to-fuel ratio.

2. Use a high-pressure fuel pump: A high-pressure fuel pump can help ensure a consistent and efficient flow of fuel into the burner.

3. Consider using a pressurized combustion chamber: While you mentioned a preference for a near-atmospheric pressure, a pressurized combustion chamber can provide better control over the combustion process and improve efficiency.

4. Use a blower for air supply: As you mentioned, using a blower can provide the necessary airflow for combustion. Make sure to select a blower that can deliver the required airflow and pressure for your burner.

5. Use a heat exchanger: To transfer heat to the water/steam in the boiler efficiently, consider using a heat exchanger. This can also help reduce the size of the burner as it allows for a more compact design.

6. Consider using a microcontroller for control: While you expressed a desire to avoid complex control electronics, a microcontroller can provide precise control over the burner and help regulate steam production. It can also be programmed to automatically ignite the burner when needed.

In terms of where to find such a burner, you can try searching for industrial suppliers or manufacturers who specialize in Diesel burners. Alternatively, you can also consider scavenging parts from old or unused equipment to create your own custom burner. We hope this information helps and wish you success in your steam-engine project.