Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Convection coefficient is modified when using Kiva

asked 2019-08-09 10:15:38 -0600

sofiag gravatar image

updated 2019-08-11 11:45:11 -0600

Hello, I'm using kiva foundation model for determining ground heat transfer in E+. I'm setting the floor's inside convection coefficient value in SurfaceProperty:ConvectionCoefficient object. However, I noticed that the simulation is not using this value I set. Does this have something to do with Kiva foundation model? Thank you

edit retag flag offensive close merge delete



Perhaps this is related to, which was implemented for E+ v9.1?

shorowit gravatar image shorowit  ( 2019-08-12 15:23:02 -0600 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2019-08-14 09:19:24 -0600

What version of EnergyPlus are you using?

As @shorowit suggests, user-defined convection coefficients in Kiva were not possible in EnergyPlus prior to version 9.1. Previous to 9.1, the convection coefficient was always set using Kiva's internal convection algorithm (consistent with EnergyPlus default algorithms for interior and exterior). In version 9.1 and later you can set the convection algorithm (or coefficient value) the same way you would any other surface.

edit flag offensive delete link more


Hi! Thanks for the answer, that's my problem then. I'm using version 8.7 because I'm modelling the geometry with Euclid extension for SketchUp. As far as I know Euclid extension is updated for E+ 8.7 but not for 9.1 version isn't it?

sofiag gravatar image sofiag  ( 2019-08-15 13:07:41 -0600 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Question Tools

1 follower


Asked: 2019-08-09 10:15:38 -0600

Seen: 250 times

Last updated: Aug 14 '19