[Hap-users] Modeling Dome Roof in HAP

[Matt Scott via Hap-users]

The closest approximation within the limits of HAP would probably be to

Consider these three options:

1)     Just make it a flat roof and make the area equal to that of the surface area of the actual dome roof.

2)     Model it like a 4-sided pyramid with 45 degree slopes facing North, East, South, and West respectively.  Divide the surface area of the dome evenly between the four triangular exposures.

3)     Brake the space in two or more sub-spaces so you have more than 4 roof exposures to work with.  Then model the dome roof as a combination of 45 degree sloped sections for each 45 degree increments (or less) of the compass along with a flat roof section and some vertical walls to approximate the curved surface with polygons.

I’d be inclined to use option 2 myself.  It will account for the sun’s path and how it shines on different parts of the dome throughout the day.

Matt

From: Hap-users [mailto:hap-users-bounces at lists.onebuilding.org] On Behalf Of Daniel Lim via Hap-users
Sent: Friday, August 12, 2016 3:57 AM
To: hap-users at lists.onebuilding.org
Subject: [Hap-users] Modeling Dome Roof in HAP

Our project is considering a dome roof for a multi-purpose space as part of a mall development. I tried drawing the dome in sketchup/openstudio and exported as gbXML which I imported in HAP. Since HAP only imports up to a maximum of 4 roof surfaces via gbXML, adjustments in the imported roof surface areas need to be made as suggested in the built-in Help. I am not sure this will be accurate considering the orientations and slopes of the surfaces that will be combined so that there are only 4 roof surfaces for the space. Any suggested workflow or work around will be highly appreciated. Thank you.

Daniel

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