RU1835479C - Ventilation system of a stock-breeding building - Google Patents

Abstract

SUMMARY OF THE INVENTION: The main and longitudinal distribution ducts are arranged in series with the supply fan in parallel with each other in the upper part of the room. An overhead shaft is installed above the room, the lower section of which is located in the room. Distribution ducts are located close to the side walls of the room. The ratio of the surface area of the main ducts to the room area is 1: 1.5. 2 ill.

Description

The invention relates to ventilation and can be used to organize air exchange in livestock and other rooms with a large heat and moisture excess. .

The purpose of the invention is to increase efficiency by utilizing the heat of internal air.

Signs that distinguish the proposed ventilation system from the prototype are the location of the distribution ducts along the side walls and the above ratio of the surface areas of the main ducts and the room itself.

The presence of these signs leads to the achievement of a positive effect, namely: providing an extensive heat exchange surface on which the phase transition occurs during moisture condensation. The heat generated in this case, together with the biological heat of the animals, is enough to heat the cold supply air with a temperature not lower than -20 ° C to

normalized values and uniform dehumidification over the entire area of the room, i.e. efficient heat recovery of indoor air is provided.

Figure 1 shows a ventilation system of a livestock building, cross section; figure 2 is the same, a top view.

The ventilation system of room 1 contains two centrifugal fans 2. interlocked, connected to the main ducts 3, which are a branched network of pipes located parallel to each other at a distance of 0.5 m. The ratio of the surface area of the main ducts and the area The room is 1.0: 1.5. Further, the main air ducts 3 are connected to the return distribution ducts 4 having perforations and located along the side walls of the room at a distance of 0.5-1.0 m from them. The ratio of the total area of the perforations and the cross-sectional area of the distributing ducts was CO

ate

4 XI O

it is 1: 2. All air ducts are located in the upper zone of the room parallel to each other, chutes 5 are suspended above them to collect and drain condensed moisture. The exhaust shaft 6 is located on the periphery of the room 1 with the air intake of the nozzles in the lower zone, the exhaust shaft 7 is located in the center of the room 1 with the air inlets placed above the air ducts.

In addition, the system includes an electric air heater 8, an air intake assembly 9, control panels with temperature sensors (not shown), which together with fans 2, in addition to temperature sensors, are located in a ventilation chamber 10 isolated from the main room 1.

Air ducts are made of a polyethylene film using a composition with sliding additives.

The system operates as follows.

One of the fans 2 supplies the supply air in an amount sufficient to create a calculated air exchange in room 1 during the winter period, and when the temperature of the indoor air rises above 10 ° C, the second fan is turned on. The system operates in automatic mode, as soon as the calculated values of the microclimate parameters are reached, one of the fans turns off. The main ducts 3 are connected to the fans 2, the passage through which the supply air is heated due to the biological heat of the animals and the heat of the phase transition during moisture condensation on the heat-exchanging surface of the ducts. The speed of movement of air or air through the duct in winter is reduced to 1.0-1.5 m / s If necessary (lowering the outside temperature below -20 ° C, keeping animals of younger age categories in the room, etc.), and in order to reduce the formation of a snow coat on a heat-exchange surface, an electric air heater 8 is turned on and the room temperature is adjusted to normalized values. The heated air then enters the return distribution ducts 4, from where it is distributed through the perforation into the animal area. In this case, the peripheral zone of the room is heated and drained, which is usually in the most unfavorable conditions in terms of microclimate.

In the cold season, the supply air is dispensed from the upper zone, and the contaminated air is extracted in a volume of 70% from the lower zone using

mines 6. The remaining 30% of the supply

air is removed through leaks in doors, windows, gates, creating excess

room pressure, which in turn

eliminates the need to install air-heat curtains, eliminates the infiltration of cold air through leaks in the building envelope.

In order to enhance the air exchange during the transition period, the internal air is drawn in.

produced through the shaft 7, and the speed of air through the ducts increases to 6 m / s.

Condensing moisture is collected in the gutters 5 and is then discharged to the feeders

for irrigation of feed with ammonium nitrate, which helps to increase the productivity of ANIMALS.

The technical and economic advantages of the proposed technical solution, consist in increasing the efficiency of the system - ventilation of the room by utilizing the heat of internal air, which allows to reduce the volume of supply air, while ensuring standardized values of all

microclimate parameters in the room.

The system is applicable for territories with a cold climate, while there is no need for additional consumption of building material to thicken the walling, as warm air is distributed along the side walls of the rooms, from the periphery to the center, and thus the influence of low outside temperature is greatly reduced.

claims

The ventilation system of the livestock building, containing a supply fan, sequentially connected main and longitudinal distribution ducts located in the upper part of the room parallel to each other, an exhaust shaft installed above the room, the lower portion of which is located in the room.

characterized in that the distribution ducts are located close to the side walls of the room, and the ratio of the surface area of the main ducts to the room area is 1: 1.5.

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