SU1587305A1 - Method of varying air parameters - Google Patents

Abstract

The invention relates to the ventilation and air conditioning of industrial and civil buildings. The aim of the invention is to improve the accuracy of maintaining the parameters of the air in the room. To do this, in a central air conditioner, when treating air with water simultaneously with the process of regulating the water pressure in front of the nozzles, the initial water temperature is proportional to the change in the irrigation coefficient, thus ensuring a constant final moisture content of the flowing air. 2 Il.

Description

 - The invention relates to a technique of ventilation and air conditioning, in particular, to methods for treating air in central air conditioners of ventilation systems and air conditioning of industrial and civil buildings.

The aim of the invention is to improve the accuracy of maintaining the parameters of the air in the room.

FIG. Figure 1 shows, in the field of the l-d diagram, the adjustment curves of the variation of the air parameters according to the invention: FIG. 2 is a setup diagram in which a method for changing air parameters is implemented.

As can be seen from FIG. 1, when the value of the reflux ratio Bi is provided, the direction of change of air parameters along curve 1 is provided for some constant values of the initial parameters of air te,. and water tzh

With an increase in the irrigation coefficient to a value of 82 with the same initial parameters of the contacting media,

place the deviation of the direction of the process on the curve.2. Under these conditions, the parameters of the supply air reach the values at the point tn2, and the resulting parameters of the air in the working area move to the point P In the end, the obtained parameters of the air in the region

P1-P2.

If, simultaneously with an increase in the irrigation coefficient (to B2), the initial water temperature is increased to a certain value of tSc2, then as a result there is less change in the direction of the air treatment process, which ensures that the required intake air parameters are reached at point 1п2.

Thus, by proportional increase in water temperature with an increase in the rate of irrigation, it is possible to exclude a change in the final moisture content of the supply air, which makes it possible to improve the accuracy

with

ate with vj

with

about ate

no air parameters in the working area of the room.

Consequently, with an increase in the rate of irrigation, a decrease in the initial water temperature to 1 gm leads to an even greater deviation of the parameters of the supply air.

Therefore, by reducing the irrigation coefficient, the required input air parameters tna are achieved by lowering the initial water temperature to tx3. Thus, the required directionality of the air treatment process is achieved.

An installation for implementing the proposed method (Fig. 2) comprises an irrigation chamber 1 with a suction pipe 2 and a pallet 3, a control valve 4 mounted on the discharge pipe 5, which is connected to an air temperature measuring device 6. The discharge pipe 5 is connected to the irrigation system 7. A pump 8 is installed between the suction 2 and discharge 7 pipelines.

In order to change the initial water temperature, the installation contains a control valve 10 connected to the device 9 for measuring the humidity of air, installed in the chilled water supply pipe 11, and a control valve 12 installed in the water supply pipe 2 heated in the irrigation chamber.

The method for changing air parameters by this installation is as follows.

Outside air having parameters

ta, f (Fig. 1), is cooled in the irrigation chamber 1 to a state at the tni point and fed to the room where it is heated to the air parameters in the working zone (point Fri). The room temperature is maintained by the control valve 4 according to the signals of the device 6, and the relative humidity is maintained by the valves 10 and 12 by the signals of the device 9.

With an increase in heat generation in the room and an increase in temperature in the working area, according to signals from the device 6 for measuring the air temperature in the room, the flow rate of sprayed air increases.

five

0

five

0

five

40

45

50

Open the control valve 4.

If, at this, a deviation of the relative humidity (the second parameter characterizing the required air parameters) of the air in the working area of the room occurs, then the signal of the device 9 simultaneously with the increase in the irrigation coefficient increases the temperature of the water supplied to the spray by increasing the flow rate of the heated water by opening regulating valve 12 and reducing the flow of chilled water by means of regulating valve 10.

At the same time, the air after the irrigation chamber 1 assumes the state at the point tn2 at a lower temperature than at the point tni P maintaining the constant moisture content of the supply air parameters. This ensures the maintenance of the required air parameters in the working area of the room (point ni).

When the heat release in the serviced room is reduced by means of this control circuit, the flow rate of the sprayed water is reduced while the initial water temperature is lowered. The air parameters in the room (point ni) are maintained at a new, higher supply air temperature (point

tna).

Claims (1)

The method of changing air parameters, which reduces the enthalpy of fresh air by irrigating it from nebulizers with water at a temperature lower than the initial temperature of the air to be treated. characterized in that, in order to improve the accuracy of maintaining the parameters of the air in the room simultaneously with the process of regulating the water pressure in front of the sprayer They change the initial temperature in proportion to the change in the surface area of the heat and mass transfer between water and air, while the process of changing the water temperature is in the region below the dew point temperature of the initial state of the incoming air. cf-consi Phase.7