How to Build Solar Greenhouse (II)

Third, the solar greenhouse’s size
The length of one solar greenhouse should better be 50 meters to 70 meters. If the length is less than 40 meters, the greenhouse volume will be small and the insulation will be reduced in the cold winter. And if the length is more than 80 meters, it will cause inconvenience for discover the films.
Forth, the height and the span of the solar greenhouse
The height and span of a greenhouse should be determined by the latitude of its location. Because the sunlight getting must depends on a degree.
Fifth, the degree and projected length of rear slope of solar greenhouse
Increasing the rear slope’s height and temperature can expand the getting sun area. But compared to the front part, the rear slope greenhouse is shaded a little. The crops in the rear slope part will grow slowly. To getting a balance, the slope wouldn’t be too large. The shadow should be about 1 meter to reducing sunlight shading.
Sixth, the covering materials of the daylight part
It should use the transmittal, fog-free, dust-free and good insulation multi-functional films. The polyethylene longevity anti-drop film, three layer compound film, polyethylene anti-drop light-turning film, ethylene-VAC three layer anti-drop insulation and aging-proof film, and PVC anti-drop film all are good for choice.

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