Yearly Energy Consumption using Degree-day 1

[m2e]

I'm having difficulty using the degree-day calculation method to find out the total annual energy use. My problem is that I'm trying to heat a building in Yukon, Canada, but I only need to heat it to approx. 10C. The normal degree day method assumes the indoor design temperature is 65F (18C).

What should the equation be for calculating the annual energy load with the different design temperature? Is there an equation in SI system?

I found some weather data in the Environment Canada website:

http://www.climate.weatheroffice.ec...nutes=&NormalsClass=A&SelNormals=&StnId=1615&

It shows some degree-day values in different temperatures. Is that the numbers I can use for my calculation?

Thanks.

 

[RossABQ]

You can get detailed bin data for most locations in the US, not sure but I'd guess Canada is similar. You can usually get the data in CSV or outright Excel format. Using the hours at each bin, and the differential, you can calculate the actual energy required at any temperature.

 

[ChrisConley]

Any reason you're using degree-day calculations? The energy world has moved on, and we're now expected to use software for most energy calculation. ASHRAE stopped publishing degree-day calcs a number of handbooks ago.

There are some decent modelling software out there, some are free.

http://oee.nrcan.gc.ca/commercial/technical-info/tools/software-new.cfm?attr=20

Download EE4, uses a DOE engine to calculate energy usage. It compares the building to a reference building, but the numbers are pretty good.