Gas Burners

I am not involved with this company, but I think you should get all the help you need from Lanemark International in the UK www.lanemark.com

Chris Clews

Thanks Chris, i will try that way, it's a precious information, however if you have more information, send.

Gas operates at a low pressure. The orifice diameter will tell you the max gas flow at your line pressure. From that you get the max BTU if it ran for 1 hour.If you have 1 orifice = easy. figure the old furnace was 50% efficient and the new one will be a 98% efficient condensing furnace.

Then speak to a furnace installer , he will have books and tables for this.

Toss the old unit, put the condensing unit in it's place. It will pay you back the cost in 2 years.

Thanks for your information aurizon, that's another way to solve the problem. I will try that way too.

I suggest you contact the gas supplier as they will have the energy content of the gas. In South Australia you pay for the gas according to the energy you use and the gas bills come with the number of kilo joules Kj you have consumed.

I don't know if its possible to do this but you could use the existing burner to heat a known quantity of water then calculate back from there.

The definition of a calorie is the amount of energy that is required to heat 1ml of water form 14.5º to 15.5ºC at one atmosphere pressure. It is however close enough to say that 1,000 calories will heat 1 liter of water 1ºC and 1Kc = 4.187 Kj.

Here in Portugal, the customer have a contract with a company of gas, and pay according to the quantity, of gas you use in Kilograms (Kg). The formula you've send to me it's very useful, and i will try that experience. Thanks masu.

I would measure the gas flow rate, or failing that, find out how much gas is consumed per time period from the gas meter etc... from that you can calculate the flow rate in readily available units and then look up the calorific value of the gas to find the power of the burner you are using now...

Don't just go by the size of the burner nozzle / injector / jets etc... that will give you inaccurate results. Gas flow is very difficult to calculate even knowing the jet size and pressure, there are many other factors to consider.

Then with the burner power consumption you can approach the burner companies with a rough specification for them to quote on...

John.

Thanks john, for more one way to solve the problem. I will try that too.

Jorge

Do you know what type of gas the company supplies you with? If you can give me they type of gas or its composition I may be able to figure out the calorific content for you.

Hi,

you can try at

www.gega.de