RU2825040C1 - Thermoelectric intensifier of heat transfer between flows of media with different temperature - Google Patents

Abstract

FIELD: thermoelectric equipment.

SUBSTANCE: invention relates to thermoelectric devices for intensification of heat exchange between flows of liquids or gases (media) with different temperature. Device consists of a thermoelectric battery composed of thermoelements identical in size and physical properties, powered by a main source of electrical energy, both surfaces of which have direct thermal contact with walls of transport zones with media moving in them. Through air ducts are made in one row in transport zones, perpendicular to direction of movement of media, and blind air ducts are made in one row parallel to movement of media. At the same time through air ducts and non-through air ducts intersect and form a single system for circulation of air flow in it. At that, above surfaces of transport zones, opposite to contact with thermoelectric battery, air flow is created by means of exhaust system, directed from surfaces of thermoelectric battery through air ducts into environment.

EFFECT: invention aims at 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 electric energy, one surface of which is flown by 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, by a medium with a higher temperature. The thermoelectric battery performs the functions of an intensifier of heat transfer between two flows of liquid or gas due to the absorption and release of Peltier heat at the junctions of the thermoelements, which 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 environments. This circumstance is associated with heat exchange between the environments and the thermoelectric battery only due to the conductive mechanism, in which the heat transfer coefficient is quite low.

The aim 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 the transport zones, perpendicular to the direction of movement of the media, through air ducts are made in one row, and parallel to the movement of the media - in one row, non-through air ducts. 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 the air ducts into the environment.

The design of the 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 the main source of electrical energy (not shown in the Fig.), both surfaces of which have direct thermal contact with the walls 2 of the transport zones 3 with the media 4 moving in them.

In the transport zones, perpendicular to the direction of movement of the media, through air ducts 5 are made in one row, and parallel to the movement of the media - in one row, blind air ducts 6. In this case, the through air ducts 5 and blind air ducts 6, as follows from Fig. 1, intersect and form a single system for the circulation of air flow in it. In this case, an air flow is created over the surfaces of the transport zones opposite the contact with the thermoelectric battery 1 using an exhaust system (not shown in the Fig.), directed from the surfaces of the thermoelectric battery 1 through the air ducts into the surrounding medium.

The thermoelectric heat transfer intensifier operates as follows. When direct electric current from the energy source is passed through the 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 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 wall 2 of the transport zone 3 with the cold moving medium, then due to the existing temperature difference, an intensification of the exchange of thermal energy between the two flows of media will occur. 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 2 of the transport zones, to add convective heat exchange in the area of a single system for the circulation of the air flow, formed by intersecting through 5 and blind 6 air ducts.

Literature

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

Claims (1)

A thermoelectric intensifier of heat transfer between flows of media with different temperatures, consisting of a thermoelectric battery composed of thermoelements identical in size and physical properties, fed by a main source of electrical energy, one surface of which is flown around by a medium with a lower temperature through a dividing wall of the transport zone, and the other, also through a dividing wall of the transport zone, by a medium with a higher temperature, characterized in that in the transport zones, perpendicular to the direction of movement of the media, through air ducts are made in one row, and parallel to the movement of the media - blind air ducts in one row, wherein an air flow is created over the surfaces of the transport zones opposite the contact with the thermoelectric battery using an exhaust system, directed from the surfaces of the thermoelectric battery through the air ducts into the surrounding medium.