Experiments to measure the performance of selected architectural solar films
CAH, published 2020-06-02
Test four samples of solar film for architectural use obtained in 2020, and also compare with four old samples from 2015.
- Five DS18B20 temperature probes behind a glass pane
- One of the probes had only the glass in front of it, as a baseline
- The other four had each a different solar film sample taped to the glass
- Temperature readings were captured with an Arduino, streamed to the UART and captured using SerialPlot
- All five probes started from a shaded state, with the same initial temperature
- Shortly after staring to capture temperature samples, all probes were exposed to direct sunlight
- Probes were left in sunlight for about 30min, ensuring temperature stabilization
- Before stopping the capture of temperature samples, all probes were shaded again, so temperatures dropped and converged
| CSV File | XSLX File | Description |
|---|---|---|
| Test 1 CSV | Test 1 XSLX | 2020-03-24_1045 - test 1 (probes 1cm from glass) |
| Test 2 CSV | Test 2 XSLX | 2020-03-24_1145 - test 2 (probes touching the glass) |
| Test 3 CSV | Test 3 XSLX | 2020-03-25_0910 - test 3 (probes exaclty 3cm away from glass) |
| Test 4 CSV | Test 4 XSLX | 2020-03-26_0900 - test 4 (probes 3cm away from glass,with 3 old samples) |
| CIR60 | DS40 | DS70 | SDS50 | |
|---|---|---|---|---|
| Transmitted visible light | 63% | 38% | 72% | 50% |
| Reflected interior visible light | 7% | 14% | 13% | 28% |
| Reflected exterior visible light | 7% | 17% | 14% | 26% |
| UV rejection | 99% | 99% | 99% | 99% |
| Solar Heat Gain Coefficient (SHGC) | 0.53 | 0.44 | 0.53 | 0.46 |
| Total rejected solar energy | 47% | 56% | 47% | 54% |
- Top row: SDS50, DS40, DS70, CIR60
- Bottom row: HS-80, HS-70, MUSEU
