Home heating Oil usage calculation??

RunHomerRun

Hi,

I'm looking for a simple rough idea to calculate oil usage.

I know there are probably lots of different variables, but I'd like to work out a rough ballpark figure.
"Guessed" variables;
- underfloor heating
- number of zones
- size of house
- type of boiler
- etc, etc

Essentially I'd like to have a guestimate that if I have the heating on in the entire house, how much oil will I burn per hour?
Almost like a miles per gallon equivalent in a car.
So, I have the timer set for 3 hours per day, how long will 500 litres of oil last?

I hope this makes sense....:o

Thanks

Billy Bunting

As a rough guide you could ask your boiler commisioning engineer (if its not in the boiler passport) what size nozzle you have fitted, this will give you US gallons per hour used, a simple hour counter wired direct to the burner will count hours of use, then its a simple calculation.

245

Just wondering - would you have to take cycle time into account? For every hour the system is switched on, there'd be a significant amount of time where the burner isn't running

MicktheMan

245 wrote: »

Just wondering - would you have to take cycle time into account? For every hour the system is switched on, there'd be a significant amount of time where the burner isn't running

Yes you would, that's why Billy Bunting said to fit the hour counter to the burner.

DoneDL

OP why don`t you just work out the heatloss from the property and get the KWs required. Then you can see what boiler size is required and work out your oil usage based on nozzle size, hours of heating, hot water requirements etc.

DGOBS

Remember the nozzle size in US/Gal is based on a 7 bar pressure, so the throughput of the the nozzle maybe more, as most condensing boilers use 8-10 bar pressures (increased throughput)

Billy Bunting

DGOBS wrote: »

Remember the nozzle size in US/Gal is based on a 7 bar pressure, so the throughput of the the nozzle maybe more, as most condensing boilers use 8-10 bar pressures (increased throughput)

The OP did ask for "a simple rough idea"

heinbloed

It is impossible to answer, the data given is insufficient.

A cheap and easy method is to meassure the oil consumption.

ozbhan

Just wondering the same thing and came across this website. For me it is fairly accurate. I spend about 40euro a week that is 6.66lts a day. I have 7 radiators and badly insulated house.

http://thehelpfulengineer.com/index.php/2011/02/how-much-does-an-oil-boiler-cost-per-hour/

jurahnimoh

Depends on the size of the nozzle in your burner doesn't it? .50 will burn half a gallon an hour, 1.00 will burn a gallon an hour etc, very good chance im wrong but tis my general understanding

crosstownk

Fit a flow meter. It will count the litres as they pass through the pipe.

A quick Google threw up this sort of thing http://www.bellflowsystems.co.uk/oil-meters/

shane0007

jurahnimoh wrote: »

Depends on the size of the nozzle in your burner doesn't it? .50 will burn half a gallon an hour, 1.00 will burn a gallon an hour etc, very good chance im wrong but tis my general understanding

It will only at 7.0 bar pressure. Higher pressure will give higher volume through same nozzle.