I am investigating a simple concept on the impact of dynamic shading on buildings thermal loads using energyplus. I am using the Shading:Zone:Detailed "Shading:Zone:Detailed" class to define my shading surfaces. surfaces as part of hipped roof overhangs. What I need to do is simply to deploy the shade during summer and remove it during winter.

To test this, I considered 5 scenarios:

• scenarios; a) No shading surface at all,
• b) fixed shade with no transmittance schedule,
• schedule, c) fixed shade with transmittance schedule = 1,
• 1, d) fixed shade with transmittance schedule = 0,
• 0 and e) shade with seasonal transmittance schedule (i.e. sch = 1 in winter and sch = 0 in summer).

summer). My analysis showed that cases (b) and (d), and (d) are exactly matching, cases (a) and (c) are exactly matching. slightly different (0.1% and 0.4% difference in heating and cooling respectively). When I apply case (e) the results are 1.5% higher in heating energy compared to case (c) and (a) and 3% lower in in cooling energy compared to case (d) (about 4% difference). (d).

I realized that the reason could be due to the "DetailedSkyDiffuseModeling" algorithm option that is enforced when the transmittance schedule varies, and thus considered the results may not be comparable. However, I tried to use the "DetailedSkyDiffuseModeling" and "updating frequency = 1" algorithm for all the cases.

cases (c) and (d) but that didn't change the results from what it is (i.e. using "SimpleSkyDiffuseModeling" algorithm). I also tried to use EMS to vary the transmittance schedule (overriding a schedule), schedule, I can see that the schedule values are changing (by reporting the new schedule) but for the results the program ended ends up using the orignal base schedule assigned in the Shading:Zone:Detailed "Shading:Zone:Detailed" class.

I came across this relevant issue and this on GitHub and looked at the comments by @Archmage and @JasonGlazer but @JasonGlazer. I am not sure if the issue is already resolved? and if is there is any workaround!workaround? I am using energyplus v9.1!

Thank you!

I am investigating a simple concept on the impact of dynamic shading on buildings thermal loads using energyplus. I am using the "Shading:Zone:Detailed" class to define my shading surfaces as part of hipped roof overhangs. What I need to do is simply to deploy the shade during summer and remove it during winter.

To test this, I considered 5 scenarios; a) No shading surface at all, b) fixed shade with no transmittance schedule, c) fixed shade with transmittance schedule = 1, d) fixed shade with transmittance schedule = 0 and e) shade with seasonal transmittance schedule (i.e. sch = 1 in winter and sch = 0 in summer). My analysis showed that cases (b) and (d) are exactly matching, cases (a) and (c) are slightly different (0.1% and 0.4% difference in heating and cooling respectively). When I apply case (e) the results are 1.5% higher in heating energy compared to case (a) and 3% lower in in cooling energy compared to case (d).

I realized that the reason could be due to the "DetailedSkyDiffuseModeling" algorithm option that is enforced when the transmittance schedule varies, and thus the results may not be comparable. However, I tried to use the "DetailedSkyDiffuseModeling" algorithm for cases (c) and (d) but that didn't change the results from what it is (i.e. using "SimpleSkyDiffuseModeling" algorithm). I also tried to use EMS to vary the transmittance schedule, I can see that the schedule values are changing (by reporting the new schedule) but for the results the program ends up using the base schedule assigned in the "Shading:Zone:Detailed" class.

I came across this relevant issue and this on GitHub and looked at the comments by @Archmage and @JasonGlazer. I am not sure if the issue is resolved? and is there any workaround? I am using energyplus v9.1!

Thank you!

I am investigating a simple concept on the impact of dynamic shading on buildings thermal loads using energyplus. I am using the "Shading:Zone:Detailed" class to define my shading surfaces as part of hipped roof overhangs. What I need to do is simply to deploy the shade during summer and remove it during winter.

To test this, I considered 5 scenarios; a) No shading surface at all, b) fixed shade with no transmittance schedule, c) fixed shade with transmittance schedule = 1, d) fixed shade with transmittance schedule = 0 and e) shade with seasonal transmittance schedule (i.e. sch = 1 in winter and sch = 0 in summer). My analysis showed that cases (b) and (d) are exactly matching, cases (a) and (c) are slightly different (0.1% and 0.4% difference in heating and cooling respectively). When I apply case (e) the results are 1.5% higher in heating energy compared to case (a) and 3% lower in in cooling energy compared to case (d).

I realized that the reason could be due to the "DetailedSkyDiffuseModeling" algorithm option that is enforced when the transmittance schedule varies, and thus the results may not be comparable. However, I tried to use the "DetailedSkyDiffuseModeling" algorithm for cases (c) and (d) but that didn't change the results from what it is (i.e. using "SimpleSkyDiffuseModeling" algorithm). I also tried to use EMS to vary the transmittance schedule, I can see that the schedule values are changing (by reporting the new schedule) but for the results the program ends up using the base schedule assigned in the "Shading:Zone:Detailed" class.

I came across this relevant issue and this on GitHub and looked at the comments by @Archmage and @JasonGlazer. I am not sure if the issue is resolved? and is there any workaround? I am using energyplus v9.1!v9!

Thank you!

I am investigating a simple concept on the impact of dynamic shading on buildings thermal loads using energyplus. I am using the "Shading:Zone:Detailed" class to define my shading surfaces as part of hipped roof overhangs. What I need to do is simply to deploy the shade during summer and remove it during winter.

To test this, I considered 5 scenarios; a) No shading surface at all, b) fixed shade with no transmittance schedule, c) fixed shade with transmittance schedule = 1, d) fixed shade with transmittance schedule = 0 and e) shade with seasonal transmittance schedule (i.e. sch = 1 in winter and sch = 0 in summer). My analysis showed that cases (b) and (d) are exactly matching, cases (a) and (c) are slightly different (0.1% and 0.4% difference in heating and cooling respectively). When I apply case (e) the results are 1.5% higher in heating energy compared to case (a) and 3% lower in in cooling energy compared to case (d).

I realized that the reason could be due to the "DetailedSkyDiffuseModeling" algorithm option that is enforced when the transmittance schedule varies, and thus the results may not be comparable. However, I tried to use the "DetailedSkyDiffuseModeling" algorithm for cases (c) and (d) but that didn't change the results from what it is (i.e. using "SimpleSkyDiffuseModeling" algorithm). algorithm. I also tried to use EMS to vary the transmittance schedule, I can see that the schedule values are changing (by reporting the new schedule) but for the results the program ends up using the base schedule assigned in the "Shading:Zone:Detailed" class.

I came across this relevant issue and this on GitHub and looked at the comments by @Archmage and @JasonGlazer. I am not sure if the issue is resolved? and is there any workaround? I am using energyplus v9!

Thank you!

I am investigating a simple concept on the impact of dynamic shading on buildings thermal loads using energyplus. I am using the "Shading:Zone:Detailed" class to define my shading surfaces as part of hipped roof overhangs. What I need to do is simply to deploy the shade during summer and remove it during winter.

To test this, I considered 5 4 scenarios; a) No shading surface at all, b) fixed shade with no transmittance schedule, c) fixed shade with transmittance schedule = 1, d) fixed shade with transmittance schedule = 0 and e) shade with seasonal transmittance schedule (i.e. sch = 1 in winter and sch = 0 in summer). My analysis showed that cases (b) and (d) are exactly matching, cases (a) and (c) are slightly different (0.1% and 0.4% difference in heating and cooling respectively). When I apply case (e) the results are 1.5% higher in heating energy compared to case (a) and 3% lower in in cooling energy compared to case (d).

I realized that the reason could be due to the "DetailedSkyDiffuseModeling" algorithm option that is enforced when the transmittance schedule varies, and thus the results may not be comparable. However, I tried to use the "DetailedSkyDiffuseModeling" algorithm for cases (c) and (d) but that didn't change the results from what it is (i.e. using "SimpleSkyDiffuseModeling" algorithm. I also tried to use EMS to vary the transmittance schedule, I can see that the values are changing but the program ends up using the base schedule assigned in the "Shading:Zone:Detailed" class.

I came across this relevant issue and this on GitHub and looked at the comments by @Archmage and @JasonGlazer. I am not sure if the issue is resolved? and is there any workaround? I am using energyplus v9!

Thank you!

I am investigating a simple concept on the impact of dynamic shading on buildings thermal loads using energyplus. I am using the "Shading:Zone:Detailed" class to define my shading surfaces as part of hipped roof overhangs. What I need to do is simply to deploy the shade during summer and remove it during winter.

To test this, I considered 4 scenarios; a) No shading surface at all, b) fixed shade with no transmittance schedule, c) fixed shade with transmittance schedule = 1, d) fixed shade with transmittance schedule = 0 and e) shade with seasonal transmittance schedule (i.e. sch = 1 in winter and sch = 0 in summer). My analysis showed that cases (b) and (d) are exactly matching, cases (a) and (c) are slightly different (0.1% and 0.4% difference in heating and cooling respectively). When I apply case (e) the results are 1.5% higher in heating energy compared to case (a) and 3% lower in in cooling energy compared to case (d).

I realized that the reason could be due to the "DetailedSkyDiffuseModeling" algorithm option that is enforced when the transmittance schedule varies, and thus the results may not be comparable. However, I tried to use the "DetailedSkyDiffuseModeling" algorithm for cases (c) and (d) but that didn't change the results from what it is (i.e. using "SimpleSkyDiffuseModeling" algorithm. I also tried to use EMS to vary the transmittance schedule, I can see that the values are changing but the program ends up using the base schedule assigned in the "Shading:Zone:Detailed" class.

I came across this relevant issue and this on GitHub and looked at the comments by @Archmage and @JasonGlazer. I am not sure if the issue is resolved? and is there any workaround? I am using energyplus v9!

Thank you!