SU1015187A2 - Regenerative heat exchanger - Google Patents

Abstract

REGENERATIVE HEAT EXCHANGER by author. St. No. 491016, characterized in that, in order to increase efficiency, heat pipes are rotatably mounted around their longitudinal axes with an angular velocity determined by the formula DY. where os is the angular velocity of the heat pipe, rad / s; to the angular velocity of the impeller, rad / s; R is the distance between the axis of rotation of the impeller and the longitudinal axis of the heat pipe, m; g is the inner radius of the pipe, m; H - acceleration of free fall, m / s 2. el 00

Description

The invention relates to heat exchangers used in systems for heating, ventilation and air conditioning.

Regenerative heat exchangers are known, comprising a housing with separating walls for heated and heating media and a drum rotating in the housing with a partition wall 1.

However, such a design of regenerative heat exchangers is characterized by the resistance of the air channels, it requires the installation of fans, and at low temperatures, the outside air must be preheated by the heater before entering the heat exchanger to prevent freezing.

By Os1K) in; Yuma auth. St. No. 491016 is known a heat exchanger comprising a casing with partition walls forming Kaiia.ibi for heated and heating media and a drum rotating in the casing, supplied with radially arranged heat pipes and a partition, the drum is arranged perpendicular to the direction of movement of the media in the channels, the total width which is 1.02-1.10 of the length of the drum, the partition is made in the form of a disk, on the periphery of the adjacent through the gland to the partition walls. In the regenerative heat exchanger closest to the technical solution and the result achieved, consisting of a housing with dividing walls, forming channels for a heated and heating medium, rotating in the impeller housing with a partition and profiled blades formed by heat pipes, the fan is connected in one unit and the heat exchanger, the working surface of which does not freeze 2.

When the drum rotates inside each heat pipe, the condensate acts by significant centrifugal forces that prevent the pipe walls from evenly wetting in the evaporation zone, causing partial wall drainage, resulting in an increase in the thermal resistance of each heat pipe, thereby reducing the heat transfer capacity of the regenerative heat exchanger.

The purpose of the invention is to increase efficiency by increasing the heat transfer capacity of the regenerative heat exchanger.

This goal is achieved by the fact that in a regenerative heat exchanger comprising a housing with separation walls forming channels for heated and heating media, a drum rotating in the housing, perpendicular to the direction of movement of the media in the channels, the total width of which is 1.02-1, 10 of the drum length, the drum is provided with radially installed heat pipes and a partition made in the form of a disk, along the periphery of the adjacent through the gland to the partition walls, the heat pipes are rotatably mounted nor around their longitudinal axes with an angular velocity determined by the formula

(R.-jJii,

where WT is the angular velocity of the heat pipe,

rad / s;

cJ angular velocity of the impeller, rad / s;

R is the distance between the axis of rotation of the working wheel and the longitudinal

the axis of the heat pipe, m; g is the internal radius of the heat pipe, m; q - acceleration of free fall,

m / s 2;

0 FIG. 1 shows a regenerative heat exchanger; in fig. 2 - the same, top view; in fig. 3 is a view .4 of FIG. 1 part). The regenerative heat exchanger contains a casing 1 with dividing walls 2, forming channels 3 and 4 for heated and heating media, and a drum 5 lying in the casing 1, equipped with radially arranged thermal flue 6 and a partition, along the periphery adjacent through the sling 8 to the partition walls 2. Heat pipes b are installed with possible rotation around their longitudinal axes. The drum 5 includes peripheral discs 9, between which profiled vanes and heat pipes 6 are placed to form a profile.

The inner surface of the heat pipes 6 is made with longitudinal cables; 10, the outer surface is provided with fins 11. A roller 12 is fixedly mounted on each heat pipe 6, interacting with the rollers of the heat pipes of its profile blade. One for each profile blade on the heat pipe is fixedly attached to the satellite 13, which engages with the support roller 14 fixedly attached to the casing 1. The drive is carried out from the engine 15 via a belt drive 16.

Regenerative heat exchanger works as follows.

During the rotation of the drum 5 by the electric motor 15 via the belt drive 16, the heated and heating medium is captured by the profile vanes and is moved along channels 3 and 4 according to the principle of the operation of a diametrical fan. Separate transportation of streams is provided by the presence of dividing walls 2, partitions made in the form of a disk 7, and an omentum 8. As the drum 5 rotates, the GZ satellites surround the support roller 14 and result

Claims (1)

REGENERATIVE HEAT EXCHANGER by ed. St. No. 491016, characterized in that, in order to increase efficiency, heat pipes are installed with the possibility of rotation around their longitudinal axes with an angular velocity determined by the formula where a5 _{t is the} angular velocity of the heat pipe, rad / s; ^ k ~ angular velocity of the impeller, rad / s; K is the distance between the axis of rotation of the impeller and the longitudinal axis of the heat pipe, m; g is the inner radius of the pipe, m; 4 - acceleration of gravity, m / s ² .