The EnviroDome Cold Weather Greenhouse uses a revolutionary energy saving design.

EAC research and development has produced the proprietary EnviroDome Cold Weather Greenhouse for which EAC holds two international patents on the designs. These sunshine greenhouses use a combination of traditional Chinese design and modern technology and are designed for year round use in colder climates with some winter sunshine and few clouds. The key energy saving technology is the thermal screen, which acts as an insulator against low temperatures while keeping the heat generated by winter sunshine within the EnviroDome. This design allows for 30% more usable land than traditional greenhouses and has lower running costs than typical modern greenhouses.

An EnviroDome Greenhouse can maintain internal temperatures of 10C, when outside temps are 20 below. Lastly, the addition of front and back windows, provide greater ventilation, precluding the need for pesticides and herbicides.

Example: The Beijing Strawberry Park

From Sept 2006 to Feb 2007, EAC built 70 EnviroDome Energy Saving Greenhouses in Beijing Strawberry Chaoyang Park. The greenhouses were constructed with attached houses, so that farmers could live along side their farms. The front arch is constructed with an entrance for machines.

Cold Weather Greenhouse Specifications:

Structure

All structures use connectors for the GVN pipe and do not require welding, thus avoiding the rusting, false welding and other problems caused by welding points in humid environments and extending the service life of the greenhouse to 15 years. Ordinary greenhouses with a steel welded structure or a 4” or 1” galvanized steel pipe welded structure see working lives of 8-10 years and must be brushed annually with an anti-rusting agent – an expensive and time consuming operating cost.

Covering Materials

Covering materials are made from plastic film using the domestic longevity anti-drop, plastic cover. The cover is attached using clips, snap-rings and tension ropes.

Ventilation

Ordinary greenhouses do not use ventilation equipment or windows and junctions in the plastic film have to be opened by hand to allow for ventilation. A common problem with ordinary greenhouses is a lack of ventilation causing undue humidity levels which benefit pests and diseases. The EnviroDome Energy Saving Greenhouse is equipped with front and back windows, fitted with insect nets that can be operated electrically or manually and forced cooling systems can be installed to aid nursery growth.

Internal Electrical Thermal Screen & Sun Shade Net System

The internal thermal screen uses aluminum foil insulation screens on the front window and on the roof inside the greenhouse, acting as an insulator while keeping heat generated by winter sunshine within the EnviroDome.  Internal sunshine shade net and the thermal screen operate on the same electric drive motor, saving energy and allowing these items to be used simultaneously or individually.

Ultra-Light Outer Heat Preservation Quilt System

The quilt is made from a three layer sewn composite material and treated with a waterproof coating film. It provides good light transmission and an extremely high anti-tearing strength and water proof performance. In winter it acts as a heat insulator and in summer as cooling agent. Due to its light transmission properties, crops can be grown year round, even while the quilt is covering the greenhouse. The quilt’s lifespan will last as long as the greenhouse.

The EnviroDome Ventilation Greenhouse is designed for humid, tropical environments.

In 2008, EAC started exporting its Ventilation Genius series to East Africa – Kenya, Ethiopia and Uganda.

In the Rift Valley the weather during the dry season is hot, dry, arid and suffers from tornadoes. Rainfall during the wet season comes in short spurts causing gluts and dearths and making it very difficult to maintain productive farming.

The Ventilation series of greenhouses are constructed to maximize production in these areas, using rain gutters, GDIS, sun shades and insect netting, proper ventilation and construction that can withstand winds up to 150 km/hr.

In Kenya, after several tornadoes, the farms with EAC greenhouses remained intact, while neighboring farms had their greenhouses completely up-rooted.

The EnviroDome greenhouses are constructed on steel frames using specially designed plastic nets and gravity-fed drip irrigation. They provide precise control of the air, temperature, water, humidity, plant nutrition, carbon dioxide and light without using any electricity. The inside environment (microclimate) of the greenhouse is controlled for growth factors like light, temperature, humidity and carbon dioxide concentration using nothing more than plastic sheets and nets, which also prevent weed and pest infiltration.

Specifications

• Sun Shade nets can be installed inside or outside the greenhouse
• EnviroDomes can stand alone or be linked together
• Prefabricated kits are assembled on-site with nuts and bolts.
• Structure made from hot dripped GVN steel pipes
• No Welding on site means minimal maintenance
• 10 meter span
• Arches every 1.5 meters
• Curtains run along the length of each tunnel
• Uses 25 mesh insect net
• Roof and sidewall covering plastic film,

EnviroDome Ventilation Greenhouse systems and sizes

Genius 2

Is a basic unit with 2 side windows

Genius 3

Similar to the Genius 2 with additional 1 window on top

Genius 4

Similar to the Genius 2 with with additional 2 windows on top.

Twin

2 or more Geniuses connected to each other with a rain gutter in between.

Hercules

Much narrower than the Genius and much stronger

Umbrella

Genius shape but with plastic only covering the roof.

The EnviroDome greenhouse is a revolution in Agriculture. It’s a turn-key system that combines the simplicity and low cost of Chinese solar greenhouse systems with the hi-tech modern greenhouse.

The EnviroDome system is a Turn-Key Solution that can be tailored to the local environment and needs of the farmer.

The systems are all inclusive and can be fully automated with integrated temp and humidity sensing systems that auto control climate, light and water activities OR work without any power connection at all with all systems be operated manually and using a gravity drip irrigation system (GDIS).

EnviroDomes can be used with the local soil or with a soil-less growing medium (hydroponics) depending on the location, however, soil is just another medium, all nutrients and water are provided through patented drip irrigation systems.

The EnviroDome greenhouse concept was invented by EAC after their split from the Eisenberg Group of companies in 2005. Since that time, they have built EnviroDome farms in some of the most extreme environments. EnviroDome greenhouses were built in the deserts of Xinjiang Province, China, the lowlands of Mombasa, Kenya and the harsh winters and humid summers of Tianjin, China.

EAC continues to win contracts to build more EnviroDome farms across China.

Maendeleo Agric was formed to expand the use of the EnviroDome to places in need outside of China.

Over the last 23 years, EAC has played an important role in the agricultural development of China, as well as many other countries in the Far East and Africa. In China, EAC maintains a factory that manufactures drip-lines for their irrigation projects, a processing workshop for greenhouse structures and arch processing, and a head office, which, through highly experienced personnel, works with Chinese officials and customers in initiating, designing and putting development projects into operation.

The Gravity Drip Irrigation System (GDIS) features an innovative combination of traditional and modern technologies to provide a fantastic solution for small farmers without access to electricity. This system was developed by EAC specifically for small farmers in low quality, semi-arable lands and arid environments.

Using GDIS farmers can successfully irrigate their crops at very low water pressures and without power.

In April 2002, EAC established its irrigation factory in Xinjiang – producing the advanced, self-cleaning, cylindrical, emitter drip irrigation pipe.

These irrigation systems are ideal for poor, small farmers.

One of the world’s largest movable deserts is the Taklimakan Desert in the Xinjiang Uyghur Region of the People’s Republic of China. The Taklimakan Desert Highway is one of the world’s first high-grade highways using virescene, combat desertification and sand fixation greenery irrigated by drip irrigation.

90% of the irrigation systems on the  Taklimakan Desert Highway project are provided by EAC.

At 520 km long, this irrigation system lies 80 meters wide and provides pressure-compensated drip irrigation pipes on both sides of the highway.

The total annual water consumption of the project is less than 6 million cubic meters.

The planted seedlings of shelterbed ecological engineering irrigated by this system runs at more than 18 million trees.

The total irrigated forest area is more than 3,000 hectares.

The stretch of highway that runs across the desert in Xinjiang is also known as the “Sea of Death”. Drip irrigation systems along this stretch, known as the Xinjiang Tarim Oilfield desert highway, set the Guinness Book of World Records for the longest irrigation system.

Because of the importance of this project and its huge expense, the Tarim Command (the project funding source) held a six year, repeated test cycle and invited all international and domestic firms to compete. In the course of the experiment, EAC irrigation lines proved their anti-clogging nature, anti-ageing resistance, and high stability, far out-performed much larger international competitors and won the contract.  The project was completed in September 2005 and years later the EAC systems are still going strong despite harsh weather conditions including 60-70 degree temperature differentials in a single day.

Korla, Kurla, or Kuerle (different spellings – same city) is a mid-sized city in central Xinjiang and is the capital of the Bayin’gholin Mongol Autonomous Prefecture.

The hills around Korla that once protected this city and the Silk Road from raiding nomads had become bald and barren over the years, subjecting the inhabitants of Korla to multiple dust storms and raining sand. Thus an ambitious project was undertaken to shield the city by greening the Dongshan Barren Hills in order to protect the inhabitants from the constant barrage of wind and sand.

Due to the difficulty of the project, EAC was chosen to design and implement a 50,000 mu drip irrigation system. The water source – the local Peacock River – proved to be an enormous filtration challenge. Impurities, suspended solids as well as a high number of seasonal sediments put an enormous strain on filtration requirements. In addition, the terrain was complex and the soil highly saline-alkaline.

EAC used a highly advance system incorporating an automatic sand media filter group, a high-quality pressure-compensated drip irrigation pipe, a field hydrodynamic pressure regulating valve and safety valves.

Five years after successfully completing the project 90% of the planted trees are still alive and Korla Dongshan, the former bald and barren hills, have become a green park enjoyed by city residents and a natural barrier for Korla’s inhabitants against the deserts’ wind and sand.