RU2299380C1 - Device for cooling or heating gas - Google Patents

Abstract

FIELD: storage heaters.

SUBSTANCE: device comprises heat insulated housing and bottom and top lids provided with inlet and outlet branch pipes and forming a tank that receives inner hollow cylinder that is mounted coaxially with respect to the housing. The sides of the cylinder are provided with a number of radially oriented tangential passages for flowing fluid. The ring space between the cylinder and housing is filled with a heat-accumulating agent. The central part of the inner cylinder is made of a chamber where the fluid is collected and mixed upstream of the storage outlet. The screw passages that are connected with the ring space are provided in the inner side of the housing for flowing fluid.

EFFECT: enhanced efficiency.

2 cl, 3 dwg

Description

The invention relates to the field of heat transfer technology and can be used to create heat exchangers (TA) for cooling or heating gaseous media during their periodic unidirectional flow, as well as batteries for cold or heat.

A regenerative heat exchanger is known that contains a vertically located reservoir lined with a layer of heat-insulating material, an inlet and an outlet pipe, between which a heat-accumulating substance in the form of granules of various diameters is placed. Heat transfer in the apparatus occurs with the axial (vertical) passage of the coolant from the inlet to the outlet through the space between the granules (Japanese application No. 57-15317, 1982).

The main disadvantage of this device is the relatively large change in the hydraulic resistance of the flow path of the working medium during operation of the heat exchanger.

The objective of the invention is the creation of a heat exchanger with a hydraulic path having a resistance, the value of which changes less during operation of the heat exchanger.

This object is achieved in that in a device for cooling or heating gaseous media containing a thermally insulated tank with inlet and outlet nozzles, between which an accumulating substance in the form of granules of various diameters is placed, an inner hollow cylinder is installed coaxially to the cylindrical body, in the walls of which there are many radially arranged tangential channels for the passage of the working medium, forming between its outer lateral surface and the inner surface of the ring body howling space filled accumulating substance in the form of beads of various diameters, and the central, hollow, part of the cylinder is a chamber in which is collected and mixed working fluid prior to exiting the exchanger. At the same time, on the inner surface of the housing, screw channels for the passage of the working medium are made, according to the type of multi-threading, and in the annular space, in the array of accumulating substance, perpendicular to the holes of the annular perforated holes forming radial channels for flowing the working medium are installed perpendicular to the side of the inner cylinder .

The invention is illustrated by drawings, in which Fig. 1 shows a longitudinal section of a heat exchanger, Fig. 2 is a section A-A (in Fig. 1), Fig. 3 is a comparative graph of the change in the calculated value of the resistance of the hydraulic tract ΔP from the operating time τ of the heat exchanger with different flow patterns for two heat exchangers having the same thermal characteristics.

The main components of the proposed device are:

1 - housing;

2 - bottom cover;

3 - top cover;

4 - inner cylinder;

5 - fairing;

6 - screw channel;

7 - annular space;

8 - accumulating substance;

9 - an annular partition;

10 - tangential hole;

11 - camera;

12 - inlet pipe;

13 - outlet pipe.

The heat exchanger consists of heat-insulated casing 1, the lower and upper covers 2, 3, which form a closed reservoir, in which the internal hollow cylinder 4 with a cowl 5 is placed. On the inner surface of the casing, there are screw channels 6 connected to an annular type of thread space 7. The annular space 7 between the cylinder and the housing is filled with an accumulating substance 8 with annular partitions 9, rigidly connected to the inner cylinder and forming radial channels for the flow of the medium. The upper part of the cylinder is rigidly connected to the upper cover 3, and its lower part has the ability to move (slide) along the body when heating or cooling the device. Tangential openings 10 are made in the walls of the cylinder, through which the working medium flows into the chamber 11, mixes, and is discharged from the TA through the outlet pipe 13.

On fmg.3 presents a comparative graph of the dependence of the change in the calculated value of the resistance of the hydraulic tract ΔP from the operating time τ TA. Two heat exchangers with the same technical characteristics, the mass of the accumulating substance and the operating time, but with different types of hydraulic channels: axial - “a” and radial - “b”, are considered. In a heat exchanger having axial channels for flowing a working medium, the pressure drop varies from 0.275 kgf / cm ² to 0.46 kgf / cm ² over a period of 130 s. A heat exchanger with radial channels has from 0.395 kgf / cm ² to 0.46 kgf / cm ² for the same operating time, which indicates a more stable operation of the device.

The heat exchanger operates in cycles with sequential and unidirectional movement of the working medium.

In the first half of the cycle, the coolant or cooler through the inlet pipe 12 is fed into the TA, is guided by the fairing 5 to the screw channels 6 of the housing 1 and through them enters the annular space 7 filled with storage substance 8, passes through the radial channels formed by the annular partitions 9, along the path heating or cooling the storage substance to a predetermined temperature. Then, through the tangential holes 10 in the inner cylinder 4, it enters the chamber 11, where it is mixed and discharged from the TA through the outlet pipe 13.

In the second half of the cycle, in the same sequence as in the first half of the cycle, a working medium is supplied to the device inlet, which, after contact with the storage substance, is heated or cooled to the operating temperature and supplied to the consumer.

Claims (3)

1. A device for cooling or heating gaseous media containing a thermally insulated tank with inlet and outlet nozzles, between which an accumulating substance is placed in the form of granules of various diameters, characterized in that an internal hollow cylinder is installed coaxially to the cylindrical body, in the walls of which a plurality of radially arranged tangential channels for the passage of the working medium, forming between the outer side surface and the inner surface of the housing an annular space, filled with an accumulating substance in the form of granules of various diameters, and the central hollow part of the cylinder is a chamber in which the working medium is collected and mixed before leaving the heat exchanger. 2. The device according to claim 1, characterized in that on the inner surface of the housing are made as multiple threads screw channels for the passage of the working medium. 3. The device according to claim 1, characterized in that in the annular space in the array of accumulating substances perpendicular to the side surface of the inner cylinder, annular perforated baffles are installed, forming radial channels between them for the flow of the working medium.

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