Equipment and method for detecting energy-saving effect of building sun-shading device using imported sunlight

Abstract

The invention provides equipment and a method for detecting an energy-saving effect of a building sun-shading device using imported sunlight, and relates to the field of the detection of the sun-shading energy-saving effect of building sun-shading products. The equipment consists of three parts: a sunlight imported system, a protected hot box and an environmental box respectively, wherein the sunlight imported system provides a stable and continuous light source for the detection, and by combining the protected hot box method, the defect that the detection can be affected by various outdoor negative factors and the defect that the use of an xenon lamp in the detection is extremely expensive are overcome, and a novel solution for detecting the energy-saving effect of the building sun-shading device is provided.

Description

Technical field: [0001] The invention relates to the detection of the energy-saving effect of building sun-shading, in particular to a method and equipment for measuring the energy-saving effect of a building sun-shading device utilizing sunlight. Background technique: [0002] At present, there are three main methods for evaluating the energy-saving effect of building sunshade devices: thermal calculation, natural light source test and artificial light source test. [0003] In the field of thermal engineering calculations, the thermal insulation performance of sunshade products can be reflected by the size of the sunshade coefficient. The shading coefficient of a sunshade product is the ratio of the total solar radiant heat entering the room through the sunshade product to the total solar radiant heat projected onto its surface. The total solar radiant heat entering the room through the sunshade product is composed of the part that enters the room directly through the open...

AI Technical Summary

Problems solved by technology

[0005] The existing equipment and control methods for protecting the thermal box are already mature technologies, but the problem existing in the application is that it is difficult to select the light source

Natural light sources are greatly affected by the outside world. Even in the same area, on different days throughout the year, the sun’s azimuth and altitude angles are changing at different times in the same day. Different weather changes will cause serious cloud conditions in the sky. The accuracy and reproducibility of the test results are affected by the test results, and the difference in different places is greater, and even in the same region or city, because it is difficult to ensure the consistency of the external environment of the thermal box, such as temperature and humidity, air convection, etc., the test results There will also be a big difference

The use of artificial light sources mainly uses long-arc xenon lamps that are closest to the solar spectrum. Its irradiated area is very limited, and it is generally used for artificially accelerated aging. , also need to use array xenon lamp group, xenon lamp is expensive, energy consumption is big, life is short, comprehensive cost is extremely high, in the world only Canadian National Solar Energy Laboratory (NSTF) adopts this method, only a few scientific research institutions and universities in China use a single The xenon lamp has done some preliminary experiments, but because the irradiated area is far from the opening area of ​​the window, the data is not of much practical significance

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