infotech2015 / cbecc

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5.4.6 Need parameters for refrigeration equipment remote condenser fraction, or fraction "lost" #96

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago
What SDD Object:Property(s) are relevant to this issue?
Project:Building:BuildingStory:Space:CommercialRefrigerationEPD

Explanation of addition, revision, or clarification:
Commercial refrigeration equipment can have remote condensers.  In this case 
the heat load on the space is negative, i.e. cools the space.  If the equipment 
has self contained condensers, then the energy consumption shows up as a heat 
gain.  We have no parameters to control this. 

For compliance and to avoid the need for a detailed model of refrigeration 
equipment, I plan to model refrigeration equipment using the EPD from the ACM, 
appendix 5.4a.  However, to simulate the heat load on the space, I would assume 
that 50% of the EPD is self-contained condensers and 50% is remote condensers.  
In this case, the heat load on the space will be approximately zero, as the 
cooling provided by the remote condenser equipment will approximately equal the 
heat gain from the self-contained condenser equipment.  In EnergyPlus, I will 
use an ElectricEquipment object, and set the "Fraction Lost" to 1.  I need an 
SDD object for the fraction lost.  

If detailed modeling of the refrigeration equipment were used, I would need a 
"Remote Condenser Fraction"  I propose adding this term as well, even though it 
won't be used for 2013. 

Proposed resolution:
Add: 
Project:Building:BuildingStory:Space:CommercialRefrigerationRemoteCondenserFract
ion
Project:Building:BuildingStory:Space:CommercialRefrigerationFractionLost

Please provide any additional information below.

Original issue reported on code.google.com by rhedr...@archenergy.com on 2 Nov 2012 at 7:53

GoogleCodeExporter commented 9 years ago
Added both properties and defined them as decimal data with no units and 
assigned them to the Space object.  

Original comment by di...@lmonte.com on 9 Nov 2012 at 7:31

GoogleCodeExporter commented 9 years ago

Original comment by rhedr...@archenergy.com on 17 Sep 2013 at 7:45