HVAC Software and Motor Size

[rperr002]

Hey Guys,

So I am doing a study on HVAC design software and how they are used to select motor size. Do any you have experience with the following software?:

eDesign HAP v4.90 , MOIST (Version 4.02), System Analyzer, YorkworksCE, SkyCalc, RHVAC, Right-Suite® Universal, HVAC-Calc

If so, how are they used to select Motor size for HVAC Systems. If anything, what is your general opinion with this software. Any information would be greatly appreciated as I don't have much experience with HVAC in general

 

[EnergyProfessional]

In Trace you can either enter specific motor data (i.e. brake hp, or kW) if youhave the specific equipment information. Or it "calculates" motorsize based on the flowrate (calculated by Trace) and pressure (entered by human being). You can also enter hp/cfm data (if pressure unknown) or it uses standard ASHRAE etc. data. Depending on what accurate or estimated data you have it can be more or less accurate. Motor oand pump/fan efficiency can vary too, so the user has to make some choice.

 

[cry22]

Something to consider in your software
Ashrae 901. paragraph 6.5.3 with tables 6.5.3.1A/B fan power limitation and adjustment

 

[Drazen]

there is no such thing as motor sizing in hvac program. hvac equipement is selected according to calculated parameters, and motor "comes" with selected equipment.

that are compliance software packages to verify whether equipment you selected comply with energy and other legislation, and they are country-specific.

software that you use often these days, cymap, allows architect to find energy compliance within uk legislation before mechanical engineer even approach to the project. that creates awkward situations, but they are caused by legislation, not software.

there is already lot of experience with eu legislation proving it to be counter-effective: energy compliance requirements are mostly dull and arbitrary and do not take into account all subtleties related to specific project, and so often legislation forces awkward solution, more expensive and less efficient, just to satisfy some pesky energy efficiency or "renewables" table.