How does the greenhouse work in winter
Greenhouses support plant growth by using technology that allows plants to grow at low external temperatures.
Here's how it works:
Solar radiation: During the day, sunlight passes through the transparent greenhouse walls and roof to warm the interior. The greenhouse structure captures and traps this solar energy, creating an interior environment that is warmer than the exterior.
Insulation system: Greenhouses are designed to minimize heat loss. Glass or plastic panels trap heat and prevent it from escaping. Insulation materials, such as double glazing panels or heat blankets, can be used to enhance insulation.
Thermal mass: Objects with high thermal mass, such as buckets, stones or concrete, can be placed inside the greenhouse. These materials absorb heat during the day and slowly release it at night, helping to maintain a stable temperature.
Heating systems: In colder climates, heating systems can be equipped to maintain the required temperature during particularly cold nights or long periods of cloudy weather.
Ventilation and air circulation: During the sunny winter months, proper ventilation is essential to prevent overheating and provide fresh air for plants. Fans and vents help regulate temperature and humidity.
Heat insulation: Insulating the base of the greenhouse and using heat shields or curtains at night can further reduce heat loss. These measures help maintain a warm environment for plant growth.
Greenhouse design: By designing for local conditions, the greenhouse is positioned for maximum exposure to sunlight, usually in a south-facing orientation, ensuring that it receives as much sunlight as possible during the short winter months.
By combining these principles and techniques, greenhouses create a microclimate that allows plants to thrive even when the outside temperature is too low to grow.
