infotech2015 / cbecc

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Process loads #169

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago
What NACM Section(s) are relevant to this issue?
5.4.8 Process gas and process electrical loads

Explanation of issue:
There are a number of inconsistencies in these descriptors, both within the ACM 
descriptors and between what is in ACM and SDD.
Process gas loads have units of Btu/h, but recommend these be normalized to 
floor area for consistency with other Spc/SpcFuncDefaults
Also recommend sensible and latent components be described as fractions of 
design input instead of separate rates, to be consistent with other descriptors 
and BEM tools.  

Proposed resolution:
AEC review descriptors and outline changes to ACM and SDD. 

Please provide any additional information below.

Original issue reported on code.google.com by da...@360-analytics.com on 25 Mar 2013 at 8:35

GoogleCodeExporter commented 9 years ago
AEC recommends:

Receptacle (Radiative = 0.20, Latent = 0.00, Convective = 0.80, Lost = 0.00) 
Gas Equipment (Radiative = 0.15, Latent = 0.20, Convective = 0.65, Lost = 0.00) 

For receptacle and gas equipment, the latent fraction and convective/radiative 
splits are prescribed values. Recommendations are based on ASHRAE 2009 HOF with 
rough assumptions of what non-process equipment is typical.

For Process, Electrical and Process, Gas inputs, since these are optional and 
highly application dependent, we recommend that these splits can be set by the 
user, with baseline same as proposed.

Original comment by JohnJArent on 5 Apr 2013 at 4:21

GoogleCodeExporter commented 9 years ago
Revising status to resolved but leaving open since rules do not completely 
reflect what is indicated for process loads; see rules for:
Spc:ProcElecRadFrac
Spc:ProcGasPwrDens

Original comment by da...@360-analytics.com on 24 Sep 2013 at 1:45

GoogleCodeExporter commented 9 years ago
Rules now match the ACM

Original comment by ncz...@archenergy.com on 15 Nov 2013 at 7:35