I am working on a small office space. I am trying to get 5 points for equipment efficiency. CPG section 1.4 indicates to provide calculations for part-load condition. It is not clear to me what exactly it is asking me for when it states that it is looking for maximum likely load and/or standard operating conditions. How do I identify this condition using HAP software? The load example on this website shows output from TRACE software that has an output for each space, but it is not clear if design day temperatures were based on some average temperatures.
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Paul Conrad
Energy EngineerCLEAResult Consulting
346 thumbs up
September 21, 2010 - 10:14 am
I believe that the CPG is asking for how part-load performance curve for the HVAC equipment. That is to say, they're interested in how the equipment will perform while not at design conditions. If possible, I'd show a range of how the equipment will perform from the point where the control system brings the system online and then 5 degree intervals until you get to the design condition.
For example, if the system comes online at 70 degrees and the design condition is 98 degrees, I'd have part load conditions for:
70
75
80
85
90
95
98
Rudolph Carneiro
HVAC consultantOptimized Systems
26 thumbs up
March 19, 2013 - 4:36 pm
Are you sure Paul? It's obivous that they want load calcs for equipment sizing in the first part of section 1.4. The subsequent part of section 1.4 asks for part - load calcs. It doesnt seem like they are asking for equipment eficiencies. IPLV requirements are covered in section 2.9.