SU946457A1 - Apparatus for producing green house microclimate - Google Patents

Description

The invention relates to equipping greenhouses to maintain the specified microclimate parameters and to provide other technological processes.

The known installation for creating a microclimate in the greenhouse includes a combustion chamber, a heat exchanger, a thermally insulated gas duct, a humidification chamber and an ejector for recirculation and ventilation air 1.

Such a system includes a large number of operating and regulating elements, which is difficult to operate, requires for this electric power (for a fan, a pump).

The velocity of the preparatory air at the exit from the ejector is not sufficient for its distribution over the greenhouse volume.

A device for creating a microclimate of greenhouses / including a heating installation, a nozzle, a distribution nozzle, a fan 2 is known.

However, the known system does not allow maintaining a constant concentration of COij, since in the regime respect it leads to a constant increase in the concentration of COii, in order to avoid what it is necessary to arrange an additional ventilation system combined with heating. The equipment of high parameters, as well as the system of water humidification through separate nozzles in the greenhouse, makes it difficult to manufacture and operate the system as a whole, and also increases its cost. In addition, extraneous energy is required to start the system.

ten

The purpose of the invention is to provide the possibility of directly maintaining a constant concentration of COi in a greenhouse at a variable heat load and to simplify the design.

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The goal is achieved by the fact that the device is equipped with a casing, the thermal installation being integrated into the casing and made in the form of a turbo burner connected via a gas duct to the flue Ks1 meter and a micro turbine connected to the hot gas source. a nozzle for water installed in the combustion chamber; and the fan is mounted on a rotary mik25 shaft.

The drawing shows the device.

Claims (2)

The installation includes a housing 1, gas pipelines 2 and 3, a microturbine 4, connected to a fan 5 through a gearbox 6, a turbo burner. 7, a combustion chamber 8 with a nozzle 9 for water, a device 10 for purging a system of gas pipelines and starting a turbo-burner, and a distribution nozzle I. The installation works as follows. Gas pipeline 2 supplies natural gas of absolute pressure up to 0.4 MPa in the quantity necessary to cover the heat loss of the greenhouse, i.e. depending on the outdoor temperature. The potential for the energy of this gas is used in microturbine 4, the torque of which is transmitted through the gearbox 6 to the fan 5. The ratio of the gas and air flow rates at variable gas consumption remains constant and is dependent on the required CO2 concentration in the greenhouse. The gas exhausted in microturbine 4 enters gas turbine 3 to turbo-burner 7, where the remainder of the potential energy of the gas is used to prepare and move the gas-air mixture. In the combustion chamber 8, the gas is burned with a short torch, at the end of which water is injected through the nozzle 9 in an amount necessary to ensure the moisture supplied to the greenhouse air, i.e. depending on the humidity of the outside air. Before leaving the distribution nozzle 11 to the greenhouse, the humidified combustion products are mixed in the air supplied by the fan 5. At the initial start-up of the installation, the device 10 is used to purge the gas pipeline system 2 and 3 and start the turbo burner 7. The proposed device provides the greenhouse microclimate (C0g1 concentration, temperature and humidity) with variable parameters of outside air. (temperature and humidity), using for this purpose only potential and chemical energy burned natural gas. The installation does not require electrical energy, and its modulated regulation is carried out only by the flow of gas and water, depending on the external parameters of the air. Constructively simple is the system of centralized moistening by spraying water into the combustion products in comparison with nozzle chambers or systems for water humidification in the greenhouse. The invention includes a device for creating a microclimate of greenhouses. Including a heating unit, a nozzle, a distribution nozzle, a fan, characterized in that, in order to ensure the possibility of directly maintaining a constant concentration of COij in a greenhouse at a variable heat load, and the design is reduced, moreover, the heat installation is built into the housing and is made in the form of a turbo-burner connected through gas pipelines to a furnace chamber and connected to a source of hot gas microtours A nozzle for water is installed in the furnace chamber, and the fan is mounted on the microturbine shaft. Sources of information taken into account in the examination 1. USSR author's certificate number 457446, cl. A 01 G 9/24, 1975. 2. USSR author's certificate number 492252, cl. A 01 G 9/24, 1976 (prototype).