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Tools for design of solar systems using air as the heat transfer media.
Tools for sizing ducts and fans.
Pipe flow pressure drop calculator.
Note that some of the companies listed under "Solar Suppliers" provide extensive technical data.
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| HVAC | |
| Air Friction chart for flex ducts http://www.hartandcooley.com/flex/air_friction_chart.pdf
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An easy to use chart to look up
friction losses for flex ducts. I find this one simple chart answers most of my duct loss questions -- it even has a correction for bends at the bottom. |
| Free Calc -- a variety of HVAC
calculators
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Duct losses, fluid flow, heat exchangers, ... |
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Stack Effect Ventilation Calculator
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Estimates airflow for thermal stacks |
| Friction loss in round or
rectangular ducts www.engineeringtoolbox.com/ ... Note: The Engineering Toolbox site has a lot of useful stuff, but also has some very scummy popup windows -- so beware. |
A very simple air duct pressure
loss calculator. The duct calculator at the link just above is will handle a wider variety of conditions, but is more complex to use. |
| Pipe Flow | |
| Copper Pipe Pressure Drop http://www.engineeringtoolbox.com
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Handy pressure drop table for
copper pipe. Note: 1 psi = 2.3 ft of head Other pressure drop tools on this site: |
| Pipe Pressure Drop Online
Calculator
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 Nice
online pressure drop calculator. Handles a wide variety of situations.Also figures loss for bends, orifices, nozzles, ... |
| Pipe flow and Duct Flow Calculators Mike Rocchetti http://www.connel.com/freeware/index.shtml
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Calculators for pressure loss in pipes and ducts, steam tables, and a Psychrometric Calculator |