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[EnergyPlus_Support] Heating degree days and cooling degree days
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Heating degree days and cooling degree days
- From: "rahmiandarini" <rahmiandarini@xxxxxxxxxxx>
- Date: Wed, 21 Oct 2009 06:56:31 -0000
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- Delivery-date: Wed, 21 Oct 2009 00:56:42 -0600
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Hi,
I have question regarding weather data of DRYCOLD.TMY, provided for simulation of case 600, ANSI/ASHRAE Standard 140-2004.
I have converted the weather so that i can use the simulation in DesignBuilder & EnergyPlus.
When I checked the documentatio of ANSI/ASHRAE Standard, it is mentioned :
Heating degree-days (Base 18.3°C) : 3636.2°C - days
Cooling degree-days (Base 18.3°C) : 487.1°C - days
and in the DesignBuilder
Heating degree-days (Base 18°C) : 3379.2°C - days
Cooling degree-days (Base 10°C) : 1446°C - days
and my question is that, what does it means, and why those values are difference as they're originally from the same data.
Thanks,
Rahmi
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