Thomas Posted January 13, 2021 Report Share Posted January 13, 2021 Hei. I am trying to simulate a facade system in Norway based on real irradiation values and compare the simulation to the real system output. While the simulation is relatively accurate in summer the output in winter is very low. This is also the case if I simulate with an albedo of 90% during the winter months. According to our irradiation sensors on the facade, the real received irradiation is up to 3-4 x GHI during the winter months. If I look at the formula used to calculate the gains from the ground reflection the maximum possible gain for a facade is RTI = GHI*albedo/2 (the cos() term will be 0 as ym 90deg) I have two questions now: What happens with the other 50% of GHI in the theoretical case the albedo is 100% Is there a way to include reflection from the surrounding area (buildings, trees, horizon, etc) into account as well? Ground reflection (Calculation) :: PV*SOL® help (valentin-software.com) Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.