[esp-r] Strange results from TIM simulations

[Ing Liang Wong]

Dear all,

I have created new material, construction and optical databases for a TIM construction, which has the following thermo-physical and optical properties:

1) external glass pane
R-Value: 0.01
Density: 2710
Spec. heat capacity: 837
Thermal conductivity: 0.76
Absorption at 0, 40, 55, 70, 80 angles: 0.016, 0.018, 0.019, 0.020, 0.021

2) PMMA capillaries
R-Value: 0.55
Density: 30
Spec. heat capacity: 1400
Thermal conductivity: 0.04
Absorption at 0, 40, 55, 70, 80 angles: 0.02, 0.025, 0.03, 0.035, 0.04

3) Internal glass pane
R-Value: 0.01
Density: 2710
Spec. heat capacity: 837
Thermal conductivity: 0.76
Absorption at 0, 40, 55, 70, 80 angles: 0.016, 0.018, 0.019, 0.020, 0.021

Overall transmission at 0, 40, 55, 70, 80 angles: 0.74, 0.702, 0.570, 0.463, 0.377

I have conducted simulations to a model with a TI-glazing and TI-wall (a separate zone as air space in between TI-glazing and wall mass). The strange thing is: 

1) when I modified the optical properties (increase or decrease the values of overall trans and absorption), the results did not changed at all. Anyone who had experienced this problem before?

2) the zone energy loss (5197.39kWh) was more than energy gain (3432.64kWh), which is not the characteristic of TIM.

Anyone can help in this case?

Thank you.


Regards,
Wong
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