professional glass and plastic film greenhouse for tomato growth
Glass greenhouses refer to greenhouses with glass as materials for light collection. It falls to greenhouses. In cultivation facilities, greenhouse is applicable to multiple regions and various climates as a form with longest duration. Due to different sizes on span and standard width, the industry is categorized into different building models. Due to different usage means, it is typed into glass greenhouse of vegetables, glass greenhouse of flowers, glass greenhouse of seedlings, ecological glass greenhouses, glass greenhouses for scientific research, stereotyped glass greenhouse, heteromorphic glass greenhouse, leisure greenhouse, smart glass greenhouses and so forth. Its area and usage means can be independently adjusted with leisure type carrying a yard being the smallest. The biggest can reach over 8 meters in height, 12 meters in span and 8 meters for the room width. Intelligence degree can be controlled at one key. Heating during wintertime for glass greenhouses can apply multiple heating means with expenses for consumable being moderate that most people can accept.
Characteristics of glass greenhouse:
(1) Big light-collection area and distributed light exposure.
(2) Long usage time and high intensity.
(3) Strong rot resistance and fire resistance.
(4) Over 90% of light perviousness and do not go decaying with time.
Greenhouse structure:
Its main body structure adopts hot galvanizing material and its coverage materials adopt PC, common or vacuum glass. It adopts aluminum alloy section exclusively used for greenhouse for inlaying with the connecting place of margin and aluminum alloy section using anti-aging EPR for sealing.
Ventilation in glass greenhouse
Ventilation in glass greenhouses is for the purpose of dispelling waste heat and moisture in the greenhouse, adjusting indoors air components, removing toxic gases and making temperature, moisture, air and other conditions catering to requirements for plantation growth.
Heating in glass greenhouse
Glass greenhouses in northern area in our country need to be heated during winter, or else it can’t go into operation. Length of warming for greenhouses varies. It takes around 5 to 6 months for heating in Northeastern areas and 3-5 months for heating in North China. plantation of flowers or growing of seedlings in the southern areas also requires heating or temporary compensation of heat.
Configuration of greenhouses
First, glass greenhouses mainly consist of greenhouse shed framework (mainly steel structure). Its coverage materials include glass (tempered glass and common glass), smart management system, temperature-reduction and ventilation system dominated by draught fan wet curtain, internal and external temperature preservation and sunlight-shield system and various components. Based on difference on environment in different parts of the country and specific usage purposes of clients, the reason giving rise to big price difference lies on different demands in different environment. For example, pure use of glass greenhouses for planting vegetables requires that cost be reduced in aesthetics. But if it is positioned in scenic spots or various ecological gardens and pick-up bases for vegetables and fruits to cater to city customers’ demands for pick-up and visit, then comparatively higher-class double-layered glass heating and temperature-reducing system might be used in building materials that can only be attained with around 500 Yuan per square meters for cost. Secondly, use of glass greenhouses for ecological restaurants in outskirts would naturally elevate building materials to a higher level. For example, double-layered tempered glass is required and high-class products are needed for various smart temperature reduction and preservation system.
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