SU1423905A1 - Method of heat exchange between two heat media - Google Patents

Abstract

Invention m. used in. adjustable heat exchangers. The purpose of the invention is the stabilization of t-ry of one of the coolants (TH). Two THs are moved along channels 1, 2, separated by a heat transfer wall 3. In one of the channels a porous insert 4 is placed that is permeable to the given TH. In the body of the insert 4, from the side of the heat transfer wall 3, an intermediate medium is supplied, which is insoluble in the T of this channel. The hermetic cavity 6 filled in the channel stabilized by the TH is filled with an intermediate medium (HC). With the stabilization of t-ry heatable TN as a PS choose a substance with a coefficient of thermal conductivity A,: D | , and at stabilization of the t-pump of the cooled TN, a substance with a heat conduction coefficient, 7 Ls, is chosen as the PS, where the heat conduction coefficient of the heat pump is moved along the channel with the insert 4. In the cavity 6, the porous insert 7 is permeable to the PS and having a coefficient thermal conductivities. With a change in the temperature of the stabilized T} 1, the PS temperature in the tank 6 and its volume also change. At the same time, the interface between the PS and the heat transfer medium in the insert 4 moves in one direction or another, increasing or decreasing the thermal resistance of the insert 4 and stabilizing the temperature of the pump. 1 hp f-ly, 4 ill. x С /) 4 ъо 00) About eaten

Description

The invention relates to power engineering, and can be used in heat exchangers with adjustable heat removal.

The aim of the invention is to stabilize the temperature of one of the heat transfer media.

Fig. 1 shows a heat exchanger for stabilizing the temperature of the heated coolant for implementing this method of heat exchange; in fig. 2 - heat exchanger to stabilize the temperature of the cooled coolant; in fig. 3 - heat exchanger to stabilize the temperature of the heat source; in fig. A - heat exchanger for stabilizing the temperature of the heat-absorbing element.

A heat exchanger for stabilizing the temperature of the heated coolant (FIG. 1) contains channels 1 and 2, respectively, for the heated and cooled coolants, separated by a heat transfer wall C. In channel 1 of the heatable coolant a porous insert 4 is placed that is permeable to this coolant. In the heat transfer wall 3, a collector 5 is made, communicated on one side with the insert 4, and on the other hand, connected to a sealed cavity 6 filled with an intermediate medium and located in the channel 1 of the heated coolant. The intermediate medium at the same time has a thermal conductivity L, less than the thermal conductivity of the heated coolant. In the cavity 6 there is also a porous insert 7 that is permeable to the intermediate medium.

In the heat exchanger to stabilize the temperature of the cooled heat carrier (FIG. 2), the porous insert 4 and the hermetic cavity 6 are located in the channel 2 of the cooled teplon carrier. At the same time, the intermediate medium has a thermal conductivity, a higher thermal conductivity of the heat transfer fluid, which is moved along channel 2 with a porous insert (cooled).

A heat exchanger for stabilizing the temperature of the heat-absorbing element (FIG. 4), for example, an electronic unit placed in channel 1 filled with heated heat exchanger, contains a porous insert 4 in channel 2 of the medium to be cooled, and a sealed cavity 6 is placed in the channel 1 with heated medium . Intermediate

4Q g about 5 jq.

.

35

50

five

the medium has a thermal conductivity of A, less thermal conductivity of the medium being cooled.

I In a heat exchanger to stabilize the temperature of the heat source (Fig. 3), for example, the flow of liquid coming from the internal combustion engine — 1GIIA, which circulates through channel 2 and is cooled by coolant flowing through channel 1, porous insert 4 is placed in channel 1, and the cavity 6 is sealed with an intermediate medium - in the channel 2 of the cooled coolant о The intermediate medium has a thermal conductivity D greater than the thermal conductivity of the coolant flowing through channel 1.

The method of heat exchange between the two coolants is as follows.

Fluids transfer along channels 1 and 2, separated by a heat transfer wall 3. Moreover, in one of the channels a porous insert 4 is placed that is permeable to the given heat carrier. In the body of the insert 4, from the side of the heat transfer wall 3, an intermediate medium is supplied that is not soluble in the coolant of this drip. In this case, the intermediate medium is supplied from the hermetic cavity 6 placed in the channel of the heat carrier being stabilized. When the temperature of the heated heat carrier stabilizes, a substance with a thermal conductivity of A, A | is selected as the intermediate medium, and when the temperature of the cooled heat carrier stabilizes (where the thermal conductivity coefficient of the heat transfer fluid moving through the channel with the porous insert 4). In the cavity 6 filled with the intermediate medium, a porous insert is also placed 7, an intermediate permeable medium, and having a coefficient., Thermal conductivity -7 A A

The coolant, moving through the channel with the porous insert 4, transmits to the insert 4 its thermal energy, which through the wall 3 is transferred to another coolant. With a change in the temperature of the stabilized heat transfer medium, the temperature of the intermediate medium in the tank 6 placed in this channel also changes. The volume of the intermediate medium changes, and the interface of the intermediate fluid of the heat transfer medium in the insert 4 moves to one side or the other, increasing or decreasing the thermal resistance of the insert 4 and ensuring temperature stabilization of the heat carrier.

The use of the invention allows the creation of compact heat exchangers that ensure the stabilization of one of the coolants and have high operational reliability.

Claims (2)

1. A heat exchange method between two heat transfer fluids by moving them through channels separated by a heat transfer wall, placing a porous insert permeable to a given heat transfer in one of the channels, and feeding the intermediate medium from the heat transfer wall into the insert body. insoluble in the coolant - this channel, characterized in that, in order to stabilize the temperature of one of the coolants, g in the channel of the heat carrier being stabilized, a hermetic cavity filled with an intermediate medium is made, and when the temperature of the heated coolant stabilizes, as which the substance with a thermal conductivity coefficient is chosen:, L, and when the temperature of the cooled coolant is stabilized, the substance is chosen with a thermal conductivity coefficient D 7 D, where D | - coefficient of thermal conductivity of the coolant moved through the channel with a porous insert. 2. The method according to p. 1, that is, and that with a cavity porous insert permeable to the intermediate medium and having a coefficient of thermal conductivity A c 7, is also placed in a cavity filled with an intermediate medium, 15 (rig 2 / j / FIGSouter M. Kosorotov Editor L. Veselovska Tehred L.OlninykKorrektor V. Romanenko -e ™ - --..-.-.-. - - - - - --- - - - - Order 4681/46 Circulation 606 Subscription VISHPI USSR State Committee PS cases of inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Grona: 1substvodno-; to; ligrlphicheskoe enterprise, Uzhgor