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BEopt 2.8 Error: multiple assignments for zone equipment -- what is it? I'm getting this fatal error in BEopt 2.8 and am

BEopt 2.8 Error: multiple assignments for zone equipment -- what is it? I'm getting this fatal error in BEopt 2.8 and am

Scott, thanks for doing this. I've just discovered that I can run that case successfully as well, however all of the oth

Scott, thanks for doing. I've just discovered that I can run that case successfully as well, however all of the other ca

BEopt Can't create new options for Finished Basement a) I can't seem to create any new options for finished basement, an

BEopt program crashing during optimization run My optimizations are causing the window "BEopt has stopped working correc

BEopt program crashing during optimization run My optimizations are causing the window "BEopt has stopped working correc

BEopt program crashing during optimization run My optimizations are causing the window "BEopt has stopped working correc

I understand that the original default ASHP models were set to 0 F minimum ODB because, at the time, E+ couldn't handle anything below -4 F. That problem has since been fixed, and if the heat pump is based on, say, a mitsubishi zuba-central, it can actually operate down to -22 F (-30 C). My, concern is that the only input value in the model indicating performance levels below 47 F is the HSPF value, but that is based on AHRI testing at temperatures only down to 17 F. Is there any way to find out which heat pumps these models are based on so they can be adjusted properly? (The paper Eric shared is helpful but does not list heat pump manufacturers/model#, and I cannot determine the model# for ASHP in either AHRI or NEEP databases from BEopt inputs alone)link text

My other concern is about the MSHP models, whose capacity and performance is well defined thanks to the capacity retention fraction, but which does not appear to have a minimum operating temperature. Does the model simply extrapolate capacity below the capacity retention temperature until COP=1?

Does anyone know which heat pumps (manufacturer & model) the BEopt default models are based on? I'm looking for the air source heat pump: SEER 22, and Mini-split heat pumps: E) & F)(ducted). The mini-split models are apparently derived from the NEEP ccASHP database [http://www.neep.org/initiatives/high-...] and I'm trying to figure out how the BEopt inputs were derived so I can do the same for other models.

(I apologize because I've asked this question before in the BEopt forum, but the forum has just been migrated to Unmet hours and apparently all previous threads have disappeared forever)

BEopt ASHP/MSHP minimum operating temperatures I understand that the original default ASHP models were set to 0 F minimu

Which heat pumps are the BEopt models based on? Does anyone know which heat pumps (manufacturer & model) the BEopt d