CO2 Dosing Systems:
Increasing the productive balance of an intensive crop means optimizing the conditions of the factors that we can manage at will versus those that are outside our control. In APR Greenhouses & Technology we offer facilities that provide intensive cultivation with carbon dioxide fertilization under the best conditions to cover from a deficit situation to the most demanding enrichment dose. To increase productivity and improve the quality in intensive greenhouse cultivation, taking advantage of the production management and heat demand with the heating systems, or dosing CO2 in state pure reused from other industrial processes as technical gases, are some examples of this type of facility.
From combustible gases with heating facilities with direct-combustion hot-air generators: The CO2 dosing systems with hot-air generators usually have a twofold use, being employed as heating units and as a CO2 production system based on the combustion of propane gas or natural gas. An appropriate layout of the generators over the project surface area, together with an adequate air flow, provides a good distribution of the heat and CO2 production. This installation modality is suitable for greenhouse cultivation where the combined use is required for heating and carbon dioxide enrichment, for crop needs and improvement in the quality of your production, and through coinciding with day periods with low outdoor temperatures or in cold climates. A CO2 dosing installation with hot-air generators includes: Regasification and gas storage installation: dispenses and regulates the supply of the gas flow necessary for the installation. Gas fuel networks Electrification network Hot-air generators: gas combustion equipment with air to air heat exchanger and fan. It has all the safety devices relative to the ignition and operation required for gas apparatus. CO2 meter and analyser: usually connected to a climate controller, it establishes the measurement of the concentration ranges in the environment of each climatic compartment.
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In central heating facilities with storage of the heat production: The generator of the heating system is operated during the day period with the twofold objective of covering the heating demand of the night period, and as a consequence, taking advantage of the production of CO2, a by-product of the combustion of the natural gas or propane gas. To such an end a heat accumulation tank is installed and a distribution and dosing network with the combustion gases covers the greenhouse surface to be treated. This system requires a climate controller that manages the production, and the demand for heat and carbon dioxide in terms of the weather forecasts, and the measurement data in the heat generation system, hot water accumulator, concurrent climate, enrichment levels and different corrections. This installation modality is suitable for greenhouse cultivation in which a heating demand is present during most of the cultivation cycle due to the external night temperatures being low or the climate cold. A CO2 dosing installation with use of the combustion gases of the central heating facilities includes: Regasification and gas storage installation: dispenses and regulates the supply of the gas flow necessary for the installation. Installation of central heating: heat accumulation tank and heating networks. The boiler-burner combination has to offer combustion gases with low levels of pollutants. Fume condenser recovery unit. CO2 dosing unit: installed in tap-off with the chimney of the fume recovery unit, it consists of a blower fan to propel the gas flow at the necessary pressure into the distribution network. A chest with mixing valve allows regulation of the admission of air from the condenser and/or from the exterior (ambient air) in the event of the safety appliances (thermostats and monoxide sensor) warning of an alarm situation. Distribution network and dosing of the combustion gases: they transport the required flows to each climatic compartment. A bank of micro-perforated small-diameter conduits doses the gases in the base and along each line of plants. CO2 meter and analyser: usually connected to a climate controller, it establishes the measurement of the concentration ranges in the environment of each climatic compartment.
top Obtained from pure liquefied gas: Gases coming from different industrial processes that allow the economical production of CO2, are liquefied, distributed and stored in cryogenic tanks for use as carbon dioxide fertilizer in intensive greenhouse cultivation. This installation modality is suitable for intensive greenhouse cultivation where there is no heating demand during most of the plant cycle, or where the objective is to cover deficient levels at certain times in which the ventilation rate is limited in areas with a mild climate and where the crop requires carbon dioxide fertilization to obtain an improvement in its final quality. A CO2 dosing installation based on pure liquefied gas includes: Installation for cryogenic storage of pure liquefied gas and regasification. Gas distribution and dosing network: it transports the flow required by each climatic compartment. A set of thin-walled injector pipes made of LDPE, of reduced diameter, 16 mm, with low discharge injectors, dose the carbon dioxide gas into the base, and along each plant line. CO2 meter and analyser: usually connected to a climate controller, it establishes the measurement of the concentration ranges in the environment of each climatic compartment.
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