Sunny Vegetarian
Replenishment date: 07.07.2009
Content: text (51 characters)
️Automatic issue of goods ✔️
️Automatic issue of goods ✔️
Sales:
0
Refunds:
0
Reviews:
0
Views:
1580
Description
"Sunny Vegetarian". This is the experience of vegetarians, with detailed descriptions of the device and work, construction drawings and projects.
The traditional greenhouse has three main problems. 1. When the sun is low (spring, autumn, winter, morning and evening), due to strong reflection at sharp angles, only 20-30% of solar energy penetrates into the greenhouse. 2. Huge heat losses through the cover and the inability to store it inside the greenhouse lead to huge jumps in day and night temperatures. 3. Direct ventilation, necessary in summer, carries away all carbon dioxide (the main food for plants!), Part of nitrogen and all moisture evaporated by leaves - hence the constant need for watering and fertilizers.
A vegetarian solves all these problems at once.
Problem 1. A vegetarian is built on a slope of 15-20 °, natural or loose, sloping south or southeast (figure). With a size of 4 by 5 m, this is quite possible. The roof is made flat - glass, or better cellular polycarbonate - that's where it is really irreplaceable! Result: the sun falls perpendicularly and reflections are almost zero. According to the authors, in comparison with conventional arched greenhouses, the arrival of solar energy increases 4-5 times, and in the morning, evening and winter - 18-21 times.
But that's not all. The back wall is capital. Actually, this is the wall of a house or utility room. It is whitewashed, and ideally covered with a mirror film. When the sun is low, it is a reflector, almost doubling the impact of rays on the soil.
The tilt itself by 15 ° at the latitude of Kiev increases winter absorption of rays by 32%. Plus a flat roof and screen. The lower the sun, the stronger the effect. When the sun stands at an angle of 20 °, twice as much energy is absorbed, at 10 ° - three times, at 5 ° - four times. A greenhouse slope of 25 ° increases the absorption of low sun by 2,5-4-6 times, respectively.
Problems 2 and 3 are solved by one of the most elegant inventions - a closed cycle of air and heat exchange.
Under the soil, at a depth of 30-35 cm, after 55-60 cm from each other, plastic (asbestos-cement) pipes (figures) lie along the entire greenhouse. Their lower ends are brought to the surface and covered from debris with a mesh. The upper (northern) ends are connected into one transverse manifold. From the collector comes a vertical pipe - a riser, laid in the main wall. It goes to the roof, but not directly, but through the control chamber. The chamber opens into the greenhouse at a height of about 1,5 m. From the bottom and from the top it is limited by dampers, and the exit to the greenhouse is ventilated. If you shade the roof with clay or chalk in the summer, a 15-20 W household exhaust fan normally serves two pipes with a diameter of 70-100 mm. If there are more pipes, additional risers with fans are made.
On a sunny day, even in winter, when outside is -10 ° С, inside a vegetarian - + 30-35 ° С. The upper chamber flap is closed. The fan sucks air into the pipes and drives it from bottom to top (figure). The air gives off heat to the soil. The cooled air is blown back into the greenhouse - and heats up again. During the day, the soil warms up to 30 ° and higher - ALL SOIL becomes a heat accumulator. There is so much of it that it is enough for almost the whole night. At night, the fan continues to work, supplying heat from the soil into the air.
Several readers have remarked: isn't it better to direct the flow the other way around - sucking in hot air from above and pumping it down through the soil? It seems more logical. But the fact is: this will require a sharp increase in fan power and energy consumption. Here you have to try.
For the last two decades this system has been widely used in Europe, especially in Scandinavia. There, warm air is pumped into the soil, and into the stone floor, and into the collectors inside the pools, and even into the walls of the adjacent rooms.
Thus, without any heating, with a daytime frost of -10 ° and a night -15 ° C, the temperature in a vegetarian is: + 18 ° C during the day, + 12 ° C at night.
The main thing is good sealing of the coating. For comparison, in an ordinary greenhouse at the same time: from 9 to 20.00 - above 10 ° C, from 12 to 16.00 - above 30 ° C, and at night, from 23.00 to 7.00 - about zero and below. Without an automatic control system, does the normal temperature in the greenhouse hold
The traditional greenhouse has three main problems. 1. When the sun is low (spring, autumn, winter, morning and evening), due to strong reflection at sharp angles, only 20-30% of solar energy penetrates into the greenhouse. 2. Huge heat losses through the cover and the inability to store it inside the greenhouse lead to huge jumps in day and night temperatures. 3. Direct ventilation, necessary in summer, carries away all carbon dioxide (the main food for plants!), Part of nitrogen and all moisture evaporated by leaves - hence the constant need for watering and fertilizers.
A vegetarian solves all these problems at once.
Problem 1. A vegetarian is built on a slope of 15-20 °, natural or loose, sloping south or southeast (figure). With a size of 4 by 5 m, this is quite possible. The roof is made flat - glass, or better cellular polycarbonate - that's where it is really irreplaceable! Result: the sun falls perpendicularly and reflections are almost zero. According to the authors, in comparison with conventional arched greenhouses, the arrival of solar energy increases 4-5 times, and in the morning, evening and winter - 18-21 times.
But that's not all. The back wall is capital. Actually, this is the wall of a house or utility room. It is whitewashed, and ideally covered with a mirror film. When the sun is low, it is a reflector, almost doubling the impact of rays on the soil.
The tilt itself by 15 ° at the latitude of Kiev increases winter absorption of rays by 32%. Plus a flat roof and screen. The lower the sun, the stronger the effect. When the sun stands at an angle of 20 °, twice as much energy is absorbed, at 10 ° - three times, at 5 ° - four times. A greenhouse slope of 25 ° increases the absorption of low sun by 2,5-4-6 times, respectively.
Problems 2 and 3 are solved by one of the most elegant inventions - a closed cycle of air and heat exchange.
Under the soil, at a depth of 30-35 cm, after 55-60 cm from each other, plastic (asbestos-cement) pipes (figures) lie along the entire greenhouse. Their lower ends are brought to the surface and covered from debris with a mesh. The upper (northern) ends are connected into one transverse manifold. From the collector comes a vertical pipe - a riser, laid in the main wall. It goes to the roof, but not directly, but through the control chamber. The chamber opens into the greenhouse at a height of about 1,5 m. From the bottom and from the top it is limited by dampers, and the exit to the greenhouse is ventilated. If you shade the roof with clay or chalk in the summer, a 15-20 W household exhaust fan normally serves two pipes with a diameter of 70-100 mm. If there are more pipes, additional risers with fans are made.
On a sunny day, even in winter, when outside is -10 ° С, inside a vegetarian - + 30-35 ° С. The upper chamber flap is closed. The fan sucks air into the pipes and drives it from bottom to top (figure). The air gives off heat to the soil. The cooled air is blown back into the greenhouse - and heats up again. During the day, the soil warms up to 30 ° and higher - ALL SOIL becomes a heat accumulator. There is so much of it that it is enough for almost the whole night. At night, the fan continues to work, supplying heat from the soil into the air.
Several readers have remarked: isn't it better to direct the flow the other way around - sucking in hot air from above and pumping it down through the soil? It seems more logical. But the fact is: this will require a sharp increase in fan power and energy consumption. Here you have to try.
For the last two decades this system has been widely used in Europe, especially in Scandinavia. There, warm air is pumped into the soil, and into the stone floor, and into the collectors inside the pools, and even into the walls of the adjacent rooms.
Thus, without any heating, with a daytime frost of -10 ° and a night -15 ° C, the temperature in a vegetarian is: + 18 ° C during the day, + 12 ° C at night.
The main thing is good sealing of the coating. For comparison, in an ordinary greenhouse at the same time: from 9 to 20.00 - above 10 ° C, from 12 to 16.00 - above 30 ° C, and at night, from 23.00 to 7.00 - about zero and below. Without an automatic control system, does the normal temperature in the greenhouse hold