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ISO 19467-2017 pdf free download
ISO 19467-2017 pdf free download.Thermal performance of windows and doors Determination of solar heat gain coefficient using solar simulator
Performance thermique desfenêtres et portes — Determination du coefficient de gain thermique solaire au moyen d’un simulateur solaire.
63 Climatic chamber
The climatic chamber is constructed of the following: a transparent aperture, an external airflow generator, an external side baffle (optional), and the surround panel aperture. It maintains the environmental external conditions (see Figure 3).
a) Transparent aperture: The transparent aperture is installed in order to allow the light from the solar simulator to pass through the climatic chamber to the test specimen. The transparent aperture shall be made from high-transmittance glass specilied as follows:
1) the solar transmittance of each glass pane according to ISO 9050 shall be 88,0 % or higher;
2) the difference between the maximum and minimum value of the spectrum transmittance according to ISO 9050:2003, Table 2 within a range of 380 nm to 2 100 nm shall be 0,050 or lower.
b) External airflow generator: The external airflow generator is installed in order to maintain the external surface coefficient of heat transfer on the test specimen. The airflow shall be parallel to the test specimen and the surround panel. The appropriate air speed shall be set to maintain the external surface coefficient of heat transfer.
c) External side baffle (optional): The external side baffle with transparency may be installed in order to form and maintain the environmental external conditions between the test specimen and the surround panel. The external side baffle is very useful to set up the environmental external conditions. More details are presented in ISO 12567-1. In this case, the environmental temperature may be considered as the air temperature. The external side baffle shall be made from high- transmittance glass.
6.4 Metering box
The metering box is constructed from the following: a cooling device, an internal side baffle (optional). one or more internal fans (optional), and a heating device (optional). It maintains the environmental internal conditions (see Figure 3).
The appropriate heat flow measuring devices such as heat flow meter and so forth shall be used in order to measure all of the heat flow rates passing through the metering box.
a) Cooling device: The cooling device is installed opposite to the test specimen in order to remove all the heat entering the metering box. The surface of the cooling device shall have a solar absorptance of 0,90 or greater and have a matte finished to maximize heat absorption. The heat flow meters or the calorimeter may be used as the heat flow measuring device. The refrigerant set a temperature lower than environmental internal temperature, is circulated over the rear surface of the cooling device. Environmental internal temperature is controlled by either the heating device, the inlet temperature of the refrigerant or the volumetric flow rate of the refrigerant or by a combination of these three.ISO 19467-2017 pdf free download.
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