Design criteria of greenhouse for cooling and healthy purpose | Design criteria and constructional details of greenhouses | design criteria of greenhouse for cooling and heating purpose | planning and design of greenhouse | greenhouse construction materials | construction of pipe framed greenhouse | truss framed greenhouse

Design criteria and constructional details of greenhouses

Design criteria of greenhouse for cooling and healthy purpose

[ Images credit by:- PIXNIO]

The term greenhouse refers to a structure coated with a transparent material for the purpose of letting in natural light for plant growth. Two or more greenhouses in one location are called a greenhouse range.

■ A building associated with greenhouses used for storage or plant support is called a service building or main house.

RELATED LINKS TO GREENHOUSE:-

Evapotranspiration, mulches and antitranspirants

Plant response to greenhouse

Microsystem of irrigation

Water use efficiency

Irrigation system used in greenhouse

Design criteria of greenhouse for cooling and heating purpose

Planning and design of greenhouse

Construction design criteria

■ To locate the greenhouse, you need to purchase a plot larger than the grower's immediate needs. The final size of the greenhouse range needs to be estimated. To this estimated figure must then be added the area to house service buildings, warehouses, access units and a parking lot.

■ The floor area of service buildings required for small businesses is approximately 13% of the greenhouse area and decreases as the size of the company increases. On average, service buildings occupy 10% of the growth area. The service building is centrally located in a distinctive nearly square design, minimizing the distance of movement of plants and materials.

■ Doors between utility buildings and the greenhouse must be wide enough to facilitate full use of the corridor width. Doors at least 3.1m wide and 2.7m high are common. It is good to have the greenhouse gutter at least 3.7m above the floor to accommodate the automation and thermal blanket and still leave room for future innovations.

Construction of glass greenhouses

Design criteria of greenhouse for cooling and healthy purpose

[ Images credit by:- Wikimedia common]

■ Glass greenhouses have the advantage of greater indoor light intensity than greenhouses lined with plastic panels and plastic films. Glass greenhouses tend to have a higher air infiltration rate, which leads to lower indoor humidity, which is beneficial for disease prevention.

■ On the other hand, glass greenhouses have a higher initial cost than plastic double-layer film greenhouses. When comparing the price of a glass greenhouse with that of a plastic film greenhouse, it is necessary to take into account the initial purchase price of each, as well as the cost of covering the greenhouse in plastic film every three or four years.

■ Various types of glass greenhouses are designed to meet specific needs. When placing a greenhouse against the side of an existing building, a sloped-to-type design is used. This design takes full advantage of sunlight and minimizes the requirements for ceiling mounts. It is mainly found in the retail sector.

■ A uniform light greenhouse is one in which the two roof pitches have the same pitch and width. In comparison, an uneven light greenhouse has uneven width ceilings, making the structure suitable for a hill. This style is rarely used because these greenhouses are not suitable for automation. Finally, a ridge and groove design uses two or more A-frame greenhouses connected together along the eaves.

■ The side wall is eliminated between the greenhouses, resulting in a structure with a single large interior. Basically, three types of frames are used in glass greenhouses, which are wooden frames (6.1m wide), pipe frames (12.2m wide) and trellis frames (15.2m wide) . The latest glass greenhouses are mainly of the reticular type. Lattice greenhouses are best suited for prefabrication.

OTHERS LINKS:-

Drought

special pruning technique in horticulture

water harvesting system in dryland agriculture

Fencing system in horticulture

plant propagation in horticulture and scope of plant propagation in horticulture

Soil erosion

■ All-metal greenhouses were cheaper to maintain as they did not require painting. Currently, practically all glass greenhouse construction is metallic. The structural members of the glass greenhouse cast shadows that reduce plant growth during the dark months of the year.

■ Aluminum bars are stronger than wooden bars; therefore, wider glass panels with aluminum bars can be used. The reduction of materials and the reflectance of aluminum have given these metal greenhouses a great advantage over wooden greenhouses in terms of greater intensity of internal light.

■ The construction of a glass greenhouse can be classified as high or low profile. The low profile greenhouse is the most popular in the Netherlands and is known as the Venlo greenhouse. Low-profile greenhouses use single sheets of glass that extend from the eaves to the ridge.

■ The low profile greenhouse slightly reduces the exposed area, which reduces the cost of heating, but is more expensive to cool. High profile greenhouses require more than one panel to cover the gutter. One problem with this design is the unsealed bond between the glass pieces in the inner layer. Moisture and dust can enter between the layers and reduce light transmission. Construction of a tubular greenhouse

■ Choosing a pipeline greenhouse construction often favors a low initial investment and a relatively long service life. Galvanized mild steel pipe as a structural element in association with wide width UV stabilized low density polyethylene (LDPE) film is a common choice for greenhouse designers.

Material requirement

The structural elements of the greenhouse are

(a) circles

(b) foundation

(d) polygrip assembly

(e) final frame

The following materials are needed for a greenhouse with an area of 4 m 20 m:

(i) Class GI Hose A (diameter 25mm, length 85cm, total length 30m)

(ii) GI class B tubing (15mm diameter, 6.0m long, 21 numbers)

(iii) GI blade (20 gauge, size 90 24 cm, 4 blades)

(iv) MS flat (25 3mm in size, 4m in length)

(v) Side support to end frames (10mm diameter rod, 10m long)

(vi) Cement concrete (mix 1: 3: 6, 1.0 m 3)

(vii) UV stabilized LDPE film (800 gauge layer, 5.4 m2 / kg, 154 m)

(viii) Polygrip

(ix) Wooden shelving

(x) Nuts and bolts

(xi) Miscellaneous items such as nails, hinges and fasteners as per requirement Erection procedure

(1) A rectangular area of 4 mx 20 m is marked on the site, preferably orienting the longest dimension in an east-west direction. This rectangle will serve as the greenhouse plan.

(Two). Mark four points at the four corners of the rectangle.

(3) Start at one corner point and work your way along the marked rectangle, marking one point every 1.25m until you reach the other corner. The same procedure is repeated on the other side of the rectangle.

(4). Dig holes of 10 cm in diameter up to 70 cm deep at all marked points with the help of a grab auger (or) a crowbar. This results in a total of 34 holes on both parallel sides of the greenhouse floor.

HORTICULTURE CROPS:-

Cinnamon (Daalchinni)

(5) Polygrip sections formed according to the drawing in two of 20 m in length.

(6). Fix the prefabricated polygrip channels to the foundation pipes at a distance of 1.25 m with the aid of screws with a diameter of 6 mm.

(7). Place these assemblies on temporary supports between the holes with the foundation pipes hanging vertically in the holes.

(8). Pour a 1: 3: 6 mix of cement and concrete around the foundation pipes so that the lower ends of 15 cm to 20 cm are covered with concrete. The concrete is compacted around the foundation pipes with the help of the lever and left to cure for 2-3 days.

(9) After curing, fill the soil around the foundation pipes to ground level and compact well.

(10). Attach the end frames at both ends. Mark the position of the legs and make holes for fixing the legs. Now install both end frames.

(11). Place the ring side of the side support elements on the foundation tube adjacent to the corner and the other side hooks on the end frame.

Pipe framed greenhouse

[ Images credit by:- PxHere]

(12). Place all rings on the base tubes so that the straight part of the ring fits into the base and rests on the bolt used for fixing the polygrip channel.

(13). Take a 20m ridge line spacing the pipes 15mm in diameter. Place the 20m long tube on the crest line of the circles.

(14) Use cross connectors on the ridge line tube so that half stays on one side of the rim and half stays on the other side.

(15) Place two 6mm diameter bolts in the holes provided at the ends of the cross connector. Bind some with the help of nuts.

(16) Repeat the same procedure to join all rings with the ridge line tube.

(17) When forming the cross connectors, the distance between the cross connectors or rings should be kept 1.25m from center to center. This polyethylene gripping mechanism will provide a firm grip on the ridge line pipe and right angle hoops without allowing for slippage.

(18) Spread the polyethylene film over the frame from one end to the other without creases and keeping the edges together.

(19) Place the polyethylene film between the polygrip channel and the strip at right angles and fix them under pressure with the help of iron rods. The film is gently stretched and fixed on the other parallel side by polygrip. In this way the polyethylene is fixed on both longer sides.

(20) At the other two remaining ends, the polyethylene is nailed to the end frames with wooden slats and nails.

(21) The remainder of the end frames are covered with a polyethylene film, fixed with wooden slats and nails.

(22) Mechanical ventilation, heating and cooling equipment is installed in the frames according to the needs of the crop.

If you like this post please subscribe and follow my site..

or any quaries about Design criteria and constructional details of greenhouses, you can leave your queries below..

You may also read.....

USEFUL LINKS:

Roof garden, marsh or bog garden

Bonsai - Styles, Plants and Containers

gardening in horticulture and essential requirements to start a gardening

Method of fruit breeding

Garden,types of garden