This greenhouse used in Saudi Arabia is designed with an arched roof and is covered with membrane. Surrounded by solar panels. The top covering film can use a film roll to achieve top ventilation. It is also equipped with a fan and water curtain for cooling. Each span has 3 sets of fans for cooling.

Greenhouses have come a long way since their humble beginnings, evolving from simple structures to sophisticated technological marvels. This journey reflects the ever-changing needs of agriculture, horticulture, and our quest for a sustainable future. In ancient times, the concept of a controlled environment for plant growth can be traced back to the Roman Empire. The Romans built rudimentary structures known as "specularia," which were used to grow exotic plants. These early greenhouses were essentially large rooms with transparent materials, such as mica or oiled cloth, to allow sunlight to enter. However, they were mainly used for the pleasure of the wealthy and did not have the advanced features we associate with modern greenhouses. During the Middle Ages, the art of growing plants in controlled environments was largely forgotten. It wasn't until the Renaissance that interest in horticulture was rekindled. Wealthy nobles and scholars began to build small gardens with glass-covered enclosures to protect delicate plants from the harsh elements. These early glasshouses were still relatively simple in design but marked the beginning of a new era in plant cultivation. Today, greenhouses are an integral part of modern agriculture and horticulture. They come in a wide variety of sizes and designs, from small backyard hobby greenhouses to large commercial operations. Advanced technologies such as computerized climate control, LED lighting, and hydroponics are being used to optimize plant growth and maximize yields. Greenhouses are also playing an important role in sustainable agriculture by reducing water consumption, minimizing pesticide use, and enabling year-round production in areas with harsh climates.

Natural ventilation systems for different greenhouse types.

In order to achieve natural ventilation, ventilation windows such as roof windows and side windows are set up in the greenhouse to form a greenhouse natural ventilation system. According to the different characteristics of each type of greenhouse, different ventilation window settings and ventilation window opening and closing types are adopted to determine sufficient wind window area to form different types of natural ventilation systems.

 

 

Tomato is a temperature-loving vegetable. Under normal conditions, its optimal growth and development temperature is 15℃--29℃, and the suitable temperature for photosynthesis is 20--25℃. When the temperature is lower than 15°C, it cannot bloom, or pollination and fertilization are poor after flowering, resulting in physiological disorders such as flower and fruit drop; when the temperature is lower than 10°C, the plant stops growing; when the temperature is lower than 5°C, it will cause low temperature damage over time; -2°C ~-1℃, it can be frozen and die in a short period of time; when the temperature is higher than 30℃, its assimilation effect is significantly reduced; when the temperature is higher than 35℃, flowering and fruiting are inhibited, and reproductive growth is interfered with or destroyed; short-term High temperatures of 40°C will also interfere with physiological growth, leading to flower and fruit drop or poor fruit development.

we had finished a big farm VENLO greenhouse for soulless tomato, this greenhouse covering glass, area is 15000 square meter.