Re: [EnergyPlus_Support] Simulating 18th century fireplaces

["Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Dear Florence,

That strikes me as something the EnergyPlus developers never envisioned and it won't be a simple modeling procedure!

If I were to attempt it, I would do something like:

• Determine the schedule for fireplace operation, including frequency and duration of use.
• Determine how to represent the intensity of the fire (e.g., starts slowly, builds and then tapers)
• Determine the predominant type of wood (hardwoods like oak have more energy content than softwoods like pine, but burn more slowly)
• If it's an open fireplace, determine whether there is a flue damper and if it gets closed in between fires - that will affect infiltration.
• Infiltration probably increases during a fire, so consider how to represent that in your model
• Determine the portion of the fire's energy which reaches the occupied space. This is often very small (perhaps 15-20% for an open fireplace), but is dependent on the design of the fireplace. The remainder of the heat goes up the chimney.

I wish you success!

On Tue, Mar 21, 2017 at 6:43 AM, flotimothy@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

I am trying to evaluate the energy performance of an 18th century country house and having difficulty simulating the fireplaces. Just wondering if anyone has done something similar or having information about the way to go about doing that. I will be grateful if i can get feed backs. Thank you Florence

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James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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