[ ] ~For the convection coefficient, will there be increase during daytime?~
[ ] ~For empirical correlation, where is there no temperature difference factor involving?~
[ ] ~If the almost constant hConv is correct, how to decrease the peak temperature?~ We should use the VCWG rah concepts.
[x] For EnergyPlus module, either larger hConv or lower temperature during noon.
[x] can you override the surface outside convection heat transfer coefficient? By EMS?
[x] If you can, try to override hConv@EP in Bypass. Can you get similar roof temperature?
[x] possible overestimation on Bypass, compared with only-vcwg (pretty much due to the EP module roof surface temperature overestimation. Possible reasons behind this: No cooling at plenum, no water balance function in EnergyPlus
[x] can you replicate the latest Bypass performance (6.24%)?
[x] make one time series comparion between VCWG and EP (sensWaste, surface).
Baseline
Bare_IDF_Bypass: 5.11%
Shading_IDF_Bypass: 5.078%
Material,
Wood 200mm, !- Name
MediumSmooth, !- Roughness
0.2, !- Thickness {m}
0.12 -> 0.93, !- Conductivity {W/m-K}
540.0000, !- Density {kg/m3}
2222.2, !- Specific Heat {J/kg-K}
0.9000000, !- Thermal Absorptance
0.7000000, !- Solar Absorptance
0.7000000; !- Visible Absorptance
Update
In sum, updates have made on EPW, uwg, IDF, roof temperature overestimation might lead to the canyon overestimation
Comparison 1
October: wallShade, wallSun, roof
December: wallShade, wallSun, roof
December (VCWG, Bypass): wallShade, wallSun, roof, canyon
Comparison 2
Previously, we have bypass performance around 21.34%;
Now, it is 6.24%.
TODOs
surface outside convection heat transfer coefficient? By EMS?hConv@EPin Bypass. Can you get similar roof temperature?EPmodule roof surface temperature overestimation. Possible reasons behind this: No cooling at plenum, no water balance function in EnergyPlusBaseline
Bare_IDF_Bypass: 5.11% Shading_IDF_Bypass: 5.078%
Update
In sum, updates have made on EPW, uwg, IDF, roof temperature overestimation might lead to the canyon overestimation
Comparison 1
Comparison 2
Previously, we have bypass performance around 21.34%; Now, it is 6.24%.
sensWaste, surface temperatures (wallSun, wallShade, roof) <- (EPW, uwg files, IDFs)