BS EN 16795:2015
$102.76
Plastics. Method for estimating heat build up of flat surfaces by simulated solar radiation
| Published By | Publication Date | Number of Pages |
| BSI | 2015 | 16 |
This European Standard specifies a method for estimating the temperature increase of a flat polymer surface, due to its solar radiant energy absorption, compared to the ambient temperature.
For that purpose, a specimen and black and white reference plates are exposed to simulated solar radiation under specified conditions (simulated solar radiation, ambient air temperature, convective flow). For opaque specimens, a thermally sensitive electrical element at the backside or a pyrometer is used to measure the surface temperature. For translucent specimens, a pyrometer is used to measure surface temperature.
NOTE Some specific polymeric materials are translucent (transparent) and might have a transmittance window in a wavelength range where the used pyrometer is sensitive (e.g. polyethylene). The surface temperature of these materials cannot be measured with the contact and the contactless method.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | European foreword |
| 6 | Introduction |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviations 5 Principle |
| 8 | 6 Apparatus 6.1 General 6.2 Test chamber 6.3 Laboratory radiation source 6.3.1 General 6.3.2 Spectral irradiance of xenon and metal halide arc lamps with global solar radiation filters |
| 9 | Table 1 — Relative spectral irradiance of laboratory radiation sources simulating global solar radiation 6.3.3 Irradiance uniformity 6.4 Radiometer 6.5 Test chamber temperature and relative humidity 6.6 Surface temperature measurement device 6.6.1 Pyrometer 6.6.1.1 Minimum requirements for the pyrometer |
| 10 | 6.6.1.2 Calibration of the pyrometer 6.6.1.3 Emissivity of material 6.6.2 Thermally sensitive electrical element 6.7 Black and white standard thermometer |
| 11 | 6.8 Defined airflow directed across the sample 6.9 Specimen holders 7 Test specimens 7.1 Form, shape and preparation 7.2 Number of test specimens 8 Exposure conditions 8.1 Radiation 8.2 Black and white standard thermometer |
| 12 | 8.3 Chamber air temperature 8.4 Relative humidity of chamber air 8.5 Wind speed 8.6 Sets of exposure conditions Table 2 — Exposure conditions for typical times of day (summer, cloudless, horizontal) 9 Procedure 9.1 General 9.2 Mounting the test specimens 9.3 Exposure |
| 13 | 9.4 Measurement of the surface temperature 10 Test report |
| 14 | Bibliography |
