The thermal insulation and heat preservation performance of glass curtain walls can be tested by the following methods:

Heat flow meter method:

This is a common test method. A cold box and a hot box are set on both sides of the glass curtain wall specimen to simulate the indoor and outdoor temperature environment. By installing heat flow meters on both sides of the specimen, the heat flow through the specimen is measured, and the temperature difference on both sides is measured at the same time, so as to calculate the heat transfer coefficient to evaluate the thermal insulation and heat preservation performance.

Protective hot box method:

The glass curtain wall specimen is placed between a protective hot box and a cold box. The protective hot box maintains a constant temperature, while the cold box cools down or heats up, measures the heat and temperature difference passing through the specimen, and calculates the heat transfer coefficient.

Infrared thermal imager detection:

Under different environmental conditions, an infrared thermal imager is used to capture the temperature distribution image of the glass curtain wall surface. By analyzing the uniformity of temperature distribution and temperature difference, the quality of thermal insulation and heat preservation performance can be preliminarily judged.

Computational simulation method:

Using professional building energy consumption simulation software, input the material parameters, structural parameters and environmental conditions of the glass curtain wall to simulate and calculate its thermal insulation and heat preservation performance.

On-site test method:

In the completed buildings, by measuring the temperature, humidity, wind speed and other parameters indoors and outdoors, combined with the energy consumption data of the air-conditioning system, the thermal insulation and heat preservation effect of the glass curtain wall is indirectly evaluated.

For example, before the completion acceptance of a large commercial building, the heat flow meter method was used to test the thermal insulation and heat preservation performance of the glass curtain wall. The test personnel set up a test device in a standard laboratory. After a period of stable operation, accurate data was obtained, the heat transfer coefficient was calculated, and it was determined whether it met the design requirements.

For example, for the performance evaluation of the glass curtain wall of some existing buildings, a combination of on-site test methods and infrared thermal imager detection may be used more to quickly discover possible thermal insulation and heat preservation problems and provide a basis for subsequent improvements.