RU1781511C - Apparatus for indirectly transpiration cooling of air - Google Patents

Abstract

Use: for cooling air. The inventive path of the installation is made in the form of a contact type apparatus and irrigated channels of an air-air heat exchanger, and the installation is additionally equipped with sequentially located water-air heat exchangers, a chilled water tank, a common flow duct passing through a chilled water tank and having fins on the inner surface, main air ducts and auxiliary flows, a pump with pipelines, a drain pipe, while dry channels of the total air flow stifling heat exchanger connected in series with the water-air heat exchangers and the total flow duct extending through the chilled water tank and having on the inner surface of the fins, which in turn is connected with air ducts primary and auxiliary air flows. The auxiliary air flow duct is connected to the contact type apparatus, and the latter with irrigated channels of the auxiliary air-air heat exchanger flow. Using a pump with pipelines, the chilled water tank is connected to the irrigated channels of the air-air heat exchanger, as well as through water-air heat exchangers with a contact type apparatus, the lower part of the irrigated channels of the air-air heat exchanger made with a bias towards the contact type apparatus, the pallet of which is connected to the chilled water tank by drain pipe. 2 ill. C 3

Description

The invention relates to sanitary engineering and can be used in the design and operation of air conditioning systems (SCR) of various objects.

The problems of creating the necessary heat and humidity parameters of the air environment are relevant for various objects.

These problems are especially fast in facilities characterized by large heat releases, as well as in facilities located in hot climatic regions.

Therefore, the creation of effective devices for heat-moisture treatment of air, which are economically safe, is a very urgent task, which is especially acute in connection with the prohibition of the use of freon refrigeration machines used in SCR, if possible.

Devices using water for heat-moisture treatment of air, as well as natural and artificial sources of cold, or operating without using a cold source, are

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various kinds of contact and surface devices, local, autonomous and non-autonomous air conditioners, etc.

Closest to the technical nature of the invention is an apparatus for indirect evaporative cooling of air.

This installation is a casing with a tray and nozzles for supplying the general and auxiliary main and auxiliary airflow to the plates placed in the corgus with saws, larno-porous coating on one and the same surface, forming ugly channels of the general and auxiliary air flows, moreover, the channels of the auxiliary air flow are muffled from the side of the nozzles for supplying the general flow and removal of the main air flow, and each of the channels of the general flow is in communication with at least one of the adjacent channels auxiliary flow through the openings formed in the plates by removing the main flow pipe.

Installation works as follows.

The full supply air stream passes through dry channels, where it is cooled at a constant moisture content, and then, at the outlet of the channels, it is divided into two parts: the main stream of chilled air enters the air-conditioned room, and the auxiliary stream is directed countercurrent to adjacent channels moistened with water coming from the pallet into the layer of capillary-porous material with which the walls of these channels are coated. After passing through the moist channels, the auxiliary air stream is heated and humidified and then discharged into the environment.

The known installation has the following disadvantages: limited capacity for cooling air and large specific volumes of the installation, due to the low intensity of the evaporation process occurring in the wet channels of the auxiliary stream, and the process of dry cooled air flowing in the dry channels, due to the laminar nature of the movement of the air stream and insufficiently developed contact surface between heat-exchanging media, as well as low operational reliability due to clogging of capillaries porous material and thereby slow down the evaporation process in wet channels,

The aim of the invention is to increase productivity, reduce

specific dimensions of the installation and increase its operational reliability.

This goal is achieved by the fact that the evaporation path of the installation is made in

in the form of a contact type apparatus and irrigated channels of an air-air heat exchanger, and the installation is additionally equipped with sequentially located water-air heat exchangers,

0 a chilled water tank, a common flow duct passing through a chilled water tank and having fins on the inner surface, air ducts of the main and auxiliary flows, a pump with pipelines, a drain pipe. In this case, the dry channels of the air-air heat exchanger are connected in series with the air heat exchangers and the common flow duct

0 through a chilled water tank and having a fin on the inner surface, which is connected to the ducts of the main and auxiliary flows. The auxiliary flow duct is connected to the inlet 5 of the contact-type apparatus, and the outlet of the contact-type apparatus is connected to the irrigated channels of the air-air heat exchanger. Using a pump with piping, tank

0 chilled water is connected to the irrigated channels of the air-air heat exchanger, and also, through the water-air heat exchangers, with a contact type apparatus, the lower part of the irrigated channels

5 of the air-air heat exchanger is made with a bias towards the contact type apparatus, the pallet of which is connected to the chilled water tank using a drain pipe.

0 in FIG. 1 and 2 show the proposed installation.

The device consists of an irrigated air-air heat exchanger 1, which is a housing with holes

5 for supply and exhaust of the general and auxiliary air flows, the supply and exhaust holes of the common flow path are interconnected by means of flat air ducts 2 installed with gaps

0 between them, and outside the ducts 2 are covered with irrigated capillary-porous material, due to which between the ducts 2 moist channels 3 of the auxiliary air flow path are formed, and

5 also ducts of the general flow 4, 5, b, and on the surface of the duct 5 from the inside there is a finning, sequentially installed water-air heat exchanger 7, a tank of chilled water 8, duct 9, to select

air flow, air duct auxiliary air flow 10, the contact apparatus 11 with a pan 12 and a drain pipe 13, a pump 14 with pipelines 15, a pipe for removing the auxiliary air stream 16, make-up device 17. In this case, the dry path 2 of the irrigated air-air heat exchanger 1 at the outlet from it, the total air flow is connected through the duct 4 with sequentially located water-air heat exchangers 7. The outlet pipe of the heat exchangers 7 is connected to the duct 5 passing through the cooled tank s 8 and having on an inner surface of the fins. The air duct 5 is connected to the air duct 6, and that, in turn, is connected to the air duct of the main air stream 9 and the air duct of the auxiliary air stream 10. The air duct of the auxiliary air flow 10 is connected to the inlet pipe of the contact type apparatus 11, and the device 11c is irrigated by channels 3 of the heat exchanger 1 Irrigated channels 3 of the heat exchanger 1 and the contact apparatus 11, using a pump 14, with pipelines 15 and a pipe 13 are connected to a chilled water tank 8.

Installation works as follows.

The total air flow with parameters A enters the dry path 2 of the heat exchanger 1, where, in contact with the cooled surfaces of the ducts of the dry path 2, it is cooled with constant moisture content. Further, through the duct 4, the total air flow enters sequentially located heat exchangers 7, where it is additionally dry-cooled. After heat exchangers 7, the total air stream enters the duct 5 passing through the chilled water tank 8, and to further enhance the effect of dry cooling of the total air stream, by using the heat storage capacity of chilled water in the tank 8, The inner surface of the duct 5 has a ribbing (not shown), which allows developing a contact surface between the heat-exchanging media. From the duct 5, the total air stream with parameters B enters the duct 6, where it is divided into the main stream directed through the duct 9 to the consumer, and the auxiliary stream coming through the duct 10 to the contact apparatus 11. In the contact apparatus 11 operating in adiabatic cooling, the auxiliary air stream is processed to state C (Fig. 2) and

enters the moist channels 3 of the heat exchanger 1, where it acquires the parameters C and the heat absorbed from the walls of the channels 2, transferred to them by the general air flow 5 of state A, spent on the evaporation of the water sprayed in the channels 3, takes the state parameters D and is removed through the pipe 16 into the environment or sent to cool heat storage volumes or arrays. In order to intensify the process of heat and mass transfer in the channels 3, due to the development of the contact surface, the walls of the channels 3 are covered with a capillary-porous material.

5 In parallel, as a result of the adiabatic process occurring in the contact type apparatus 11, the water acquires the parameters E and enters the pan 12. The chilled water from the wet

0 channels 3 of the heat exchanger 1, due to the fact that the lower part of the channel 3 is made with a slope towards the contact apparatus 11. From the pan 12, the cooled water, using the drain pipe 13, enters

5 the chilled water tank 8, and from the tank 8, using the pump 14 with pipelines 15, the chilled water is supplied to the irrigated channels 3, as well as to the heat exchangers 7, from which it enters the contact

0 type 11.

In the tank 8, the water level evaporating in the apparatus 11 and channels 3 is maintained by the make-up device 17. The claimed device has the following advantages over the prototype: higher productivity and operational reliability, smaller specific dimensions, due to the intensification of the evaporation process during auxiliary path of the device, due to the fact that the evaporation path is made in the form of a contact type apparatus and irrigated channels of an air-air heat exchanger. and also due to the development of the contact surface between the cooled air stream and water, by using air-water heat exchangers and making fins on the inner surface of the duct combined with the chilled water tank.

Claims (1)

SUMMARY OF THE INVENTION An apparatus for indirectly evaporative cooling of air, comprising dry and wet channels of general and auxiliary air flows, a tray and a make-up device, characterized in that, in order to increase productivity and operational reliability, the apparatus is provided with sequentially located water-air heat exchangers, a chilled water tank, a common air duct passing through a chilled water tank and having fins on the inner surface, main and auxiliary flow ducts, a pump with pipelines, a drain pipe, the wet channel being made in the form of a contact type apparatus and irrigated air-to-air heat exchanger channels, moreover, the dry channels of the total flow of air-air heat exchangers are connected in series with water-air heat exchangers and an air duct of a common flow connected to air oestriasis main and subsidiary air streams, WHO the auxiliary air flow duct is connected to the contact type apparatus, and the latter to the irrigated channels of the auxiliary air-air heat exchanger flow, the chilled water tank is connected by means of a pump to the pipeline with the irrigated air-air heat exchanger channels, and also through the water-air heat exchangers to the contact type apparatus, while the lower part the irrigated channels of the air-air heat exchanger is made with a bias towards the contact type apparatus, the pallet of which is connected to the tank chilled water through a drain pipe. IL / 0 // S Figure 1 if 2 ft / 7 3F -fOO% d Thebes. 2.