價格：免費
更新日期：2019-06-14
檔案大小：3.1M
目前版本：1.2 (2019.06.14)
版本需求：Android 2.1 以上版本
官方網站：http://www.helioscreen.com
Email：fabrics@helioscreen.com
This app calculates gtot, the total solar energy transmittance (also called solar factor) for the combination of a glazing and a parallel interior or exterior solar protection device, such as a louvre, a venetian or a roller blind. Venetian or louvre blinds are assumed to be adjusted so that there is no direct solar penetration.
The value of gtot is between 0 (no radiation transmitted) and 1 (all radiation transmitted).
The calculation is based on the standard ISO 52022-1:2017 (simplified calculation method). This method can also be used for inclined elements.
Restrictions: the simplified calculation method can be applied only if
- the solar factor g of the glazing is between 0,15 and 0,85.
- the solar transmittance Ts and the solar reflectance Rs of the solar protection devices are within the following ranges: 0% <= Ts <= 50% and 10% <= Rs <= 80%.
The resulting g-values of the simplified method are approximate and their deviation from the exact values lie within the range between +0,10 and -0,02. The results generally tend to lie on the safe side for cooling load estimations.
The app provides technical characteristics of 4 typical glazings (A,B,C and D) and contains a database with
the necessary photometric values of the Helioscreen fabrics collection.