RU2820571C1 - Thermoelectric intensifier of heat transfer between flows of media with different temperature - Google Patents

Abstract

FIELD: thermoelectric equipment.

SUBSTANCE: invention relates to thermoelectric equipment, in particular to thermoelectric devices for intensification of heat exchange between flows of liquids or gases (media) with different temperature. Device consists of thermoelectric battery composed of thermoelements identical in size and physical properties, powered by main source of electric energy, which both surfaces have direct thermal contact with walls of two transport zones with media moving in them. In each of the transport zones there are two groups of through air ducts in several rows, the number of which varies from 3 to 5, arranged in a corridor order. At that, in each transport zone the air ducts have a mirror arrangement relative to the central vertical plane at an angle to it within range of 25-45 degrees. Pairs of air ducts in the first and second transport zones are mirrored in the central horizontal plane. Above surfaces of transport zones, opposite to contact with thermoelectric battery, air flow is created by means of exhaust system, which is directed from surfaces of thermoelectric battery through air ducts into environment.

EFFECT: intensification of heat exchange between thermoelectric battery and media flowing around it.

1 cl, 1 dwg

Description

The invention relates to thermoelectric technology, in particular to thermoelectric devices for intensifying heat exchange between flows of liquids or gases (media) with different temperatures.

The prototype is the design described in [1]. The device consists of a thermoelectric battery composed of thermoelements identical in size and physical properties, powered by a source of electrical energy, one surface of which flows around a medium with a lower temperature through the dividing wall of the first transport zone, and the other, also through the dividing wall of the second transport zone, flows around a medium with a higher temperature. high temperature. The thermoelectric battery acts as a heat transfer intensifier between two flows of liquid or gas due to the absorption and release of Peltier heat at the junctions of thermoelements that are in thermal contact with them.

The disadvantage of the device is the relatively low intensity of heat exchange between the junctions of the thermoelements that make up the thermoelectric battery and the corresponding media. This circumstance is associated with heat exchange between the media and the thermoelectric battery only due to the conductive mechanism, in which the heat transfer coefficient is quite low.

The purpose of the invention is to intensify heat exchange between a thermoelectric battery and the media flowing around it.

The goal is achieved by the fact that in each of the transport zones there are two groups of through air ducts in several rows, the number of which varies from 3 to 5, located in a corridor order, and in each transport zone the air ducts have a mirror arrangement relative to the central vertical plane at an angle to it, located within 25-45 degrees. Pairs of air ducts in the first and second transport zones are mirrored in the central horizontal plane. Above the surfaces of the transport zones opposite the contact with the thermoelectric battery, an air flow is created using an exhaust system, directed from the surfaces of the thermoelectric battery through air ducts into the environment.

The design of a thermoelectric heat transfer intensifier is shown in Fig. 1. The device consists of a thermoelectric battery 1, composed of thermoelements identical in size and physical properties, powered by a source of electrical energy (not shown in the figure), both surfaces of which have direct thermal contact with the walls 2 of two transport zones 3 with media moving in them 4. In each of the transport zones 3, there are two groups of through air ducts 5, 6 and 7, 8 in several rows, the number of which varies from 3 to 5, located in a corridor order. Moreover, in each transport zone 3, the air ducts 5, 6 and 7, 8 have a mirror arrangement relative to the central vertical plane 9 at an angle to it, located in the range of 25-45 degrees. Pairs of air ducts 5, 6 in the first and 7, 8 of the second transport zones 3 are mirrored in the central horizontal plane 10. Above the surfaces of the transport zones 3, opposite the contact with the thermoelectric battery 1, an air flow is created using an exhaust system (not shown in the figure), directed from the surfaces of the thermoelectric battery 1 through the air ducts into the environment.

The thermoelectric heat transfer intensifier works as follows. When direct electric current from an energy source is passed through thermoelectric battery 1, Peltier heat will be absorbed at some junctions of the thermoelements, and released at others. If the cold junctions of the thermoelements are in direct contact with the wall 2 of the transport zone 3 with the hot moving medium 4, and the hot junctions of the thermoelements are in direct contact with the wall 2 of the transport zone 3 with the cold moving medium, then due to the existing temperature difference there will be an intensification of the exchange of thermal energy between two streams of media. The air flow from the surfaces of the thermoelectric battery 1 will make it possible, in addition to the conductive heat exchange between the surfaces of the thermoelectric battery 1 and the walls of the 2 transport zones, to add convective heat exchange in the area of the air ducts 5,6, 7 and 8.

Literature

1. Kaganov M.A., Privin M.R. Thermoelectric heat pumps. L.: Energy. - 1970. - P. 175.

Claims (1)

Thermoelectric heat transfer intensifier between media flows with different temperatures, consisting of a thermoelectric battery composed of thermoelements identical in size and physical properties, powered by a source of electrical energy, one surface of which is flown around a medium with a lower temperature through the dividing wall of the first transport zone, and the other, also through the dividing wall of the second transport zone, is flown around a medium with a higher temperature temperature, characterized in that in each of the transport zones there are two groups of through air ducts in several rows, the number of which varies from 3 to 5, located in a corridor order, and in each transport zone the air ducts have a mirror arrangement relative to the central vertical plane at an angle to it , located within 25-45 degrees, and pairs of air ducts in the first and second transport zones are mirrored in the central horizontal plane, while above the surfaces of the transport zones opposite to the contact with the thermoelectric battery, an air flow is created using an exhaust system directed from the surfaces of the thermoelectric battery batteries through air ducts into the environment.