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The "Pros" and "Cons" of PC Sunshine Panel

Sep. 10, 2020

1. The characteristics of PC solar panel greenhouse

PC Board Greenhouse has many advantages such as good thermal insulation performance, strong impact resistance, lightweight, large installation size, long service life, beautiful appearance, good visual experience, and high initial light transmittance. It is highly praised by greenhouse builders and greenhouse manufacturers for "the latest greenhouse structure". Until now, the application of PC board light-transmitting materials in greenhouses is gradually increasing.

In this way, the advantages of PC solar panel greenhouses seem to be particularly obvious, and it seems to be a replacement product for glass greenhouses, because in their opinion, the cost of greenhouses constructed by PC solar panels is lower than that of glass greenhouses, and other performances are not bad.

2. The light transmittance of PC solar panel greenhouse

However, the production practice of PC board greenhouses in the past few years has shown that PC board greenhouses are not so perfect, first of all in the light transmittance of the greenhouse. Generally, the initial light transmittance of a 10mm thick hollow PC sheet is 78%, which is 10%~15% lower than single-layer plastic film and 10% lower than 4mm thick float glass. This shortcoming is accompanied by lifetime; and plastic film can be 3~5 Yearly replacement restores the light transmittance. The light transmittance of glass material hardly changes with time, but the light transmittance of PC board material decreases every year during the 10-year lifespan guaranteed by the manufacturer.

The decrease in the light transmittance of the PC sun panel itself is often not the main reason for the lack of light transmission in the greenhouse. The condensation and dust accumulation inside the hollow PC sun panel is the "culprit". In the construction and installation of greenhouses, it is often impossible to completely ensure that the hollow PC solar panels are tightly sealed. The air around the greenhouse will enter the interspaces of the hollow PC solar panels at any time, and the humid air containing moisture will enter the interspaces of the PC solar panels. Because the sealing of the PC solar panel makes it difficult to discharge, this kind of structure that is easy to enter and difficult to exit causes a large amount of water vapor to accumulate in the interspace of the PC solar panel.

Moreover, due to air pollution, the humid air also contains a lot of dust and dust, which will continue to accumulate on the hollow wall of the PC sun panel, and eventually, the dust pollution will cause a sharp drop in the light transmittance of the PC sun panel material. In areas with more serious air pollution, the greater the decrease in light transmittance of the greenhouse will eventually cause the PC solar panel to be far from reaching its strength and service life, but the light transmittance cannot meet the production needs of the actual greenhouse.

When choosing light-transmitting materials for greenhouses, the understanding of PC sun panels should also fully consider the local climate characteristics and possible consequences.

PC Board Greenhouse

PC Board Greenhouse

3. The dripping problem of PC solar panels in a greenhouse

In addition, the dripping property of PC Board Greenhouse China is also a major factor affecting the light transmission and use performance of the greenhouse. The dripping property refers to the large water vapor in the greenhouse, which forms condensed water on the top or surrounding PC sun panels to flow down and drip. Most brands of PC solar panels do not have dripping performance. Although some PC solar panels have an anti-dripping performance at the beginning, their anti-dripping performance fails after a period of time and cannot keep up with the service life.

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