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5.7.5.2 - Organization of DX Coil information #24

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What NACM Section(s) are relevant to this issue?
5.7.5.2 - Direct Expansion

Explanation of issue:
The current NACM has one large section called “Direct Expansion Efficiency 
Adjustment Curve”, which includes information on calculating both full load 
efficiency, and part load curves.  

Proposed resolution:
Suggest revising this NACM section into at least two parts:
1) A section with relevant text/equations for calculating full-load efficiency
2) A section with relevant text/equations for describing the efficiency 
adjustment curves.

Please provide any additional information below.
THIS ISSUE ORIGINALLY SUMMARIZED IN "SDD_XML_to_OSM_Review-20120604.docx"

Original issue reported on code.google.com by da...@360-analytics.com on 21 Jun 2012 at 5:15

GoogleCodeExporter commented 9 years ago 
agreed

Original comment by JohnJArent on 26 Jun 2012 at 11:24

GoogleCodeExporter commented 9 years ago 
Split out the efficiency rating section into two parts: Direct Expansion 
Cooling Efficiency (EER), and Seasonal Energy Efficiency Ratio (SEER).  Also 
split out the part-load curves that were in the Direct Expansion Cooling 
Efficiency Temperature Adjustment Curve and placed them into the part-load 
curve Section.  

Notes:
1. Added a new term - Seasonal Energy Efficiency Ratio. This way the other 
building descriptor doesn't contain two different efficiency terms, one of them 
optional.
2. Does it make sense to change the building descriptor name "Direct Expansion 
Cooling Efficiency" to "Energy Efficiency Ratio"?  Industry commonly uses EER 
to represent efficiency and having a different term may be confusing.
3. The equipment categories for the performance curves don't match the list of 
equipment types cleanly. For example, the "Air Source (Other)" refers to any 
air-source system that is not a PTAC (for example, packaged single zone, 
packaged VAV, and I think packaged air source heat pump). We will need a 
mapping from the system types (more system types than the baseline systems) to 
the categories used in the performance curves.

Original comment by JohnJArent on 27 Jun 2012 at 9:30

GoogleCodeExporter commented 9 years ago 
Marking issue DoneVerified as working rulese for this now and will log new 
issues if needed.

Original comment by da...@360-analytics.com on 31 Jan 2013 at 12:37