SU1469284A1 - Evaporating condensating system - Google Patents

Description

(21) 4234945 / 24-06

(22) 23.04.87

(46) 03/30/89. Bul № 12

(71) Institute of Applied Physics, Academy of Sciences of the MSSR

(72) S.M.Klimov, A.B.Didkovsky, M.K.Bologa and S.I. Chuchkalov

(53) 621.565.58 (088.8)

(56) USSR Author's Certificate No. 798466, cl. F 28 D 15/02, 1978.

(54) EVAPORATING CONDENSATION SYSTEM

(57) FIELD OF THE INVENTION The invention relates to heat transmitting devices and may be. used in cooling systems for optoelectronic and high-voltage equipment. The purpose of the invention is to improve the accuracy of thermal stabilization of objects of cooling and expanding the range of application of the device. Zones 2 and 3 of evaporation and condensation are located on the flat side walls of the housing 1, which are joined by cylindrical sections and flat end walls.

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The movable insert (B) 4 is installed in the housing between the side walls with an offset towards zone 2 and is made in the form of a wedge with rounded narrow and wide parts and end walls. B is provided with an axis of rotation 6 in the wide part, and the ratio of the difference of the radii of curvature rounded to the minimum width of the slotted channel between B and zone 2 is 4-8. The end backrests B are connected by flexible dielectric jumpers with the end walls of the housing. Bimetallic plate 5 is placed in the gap

one

The invention relates to heat transmitting devices and can be used in cooling systems for optoelectronic and high voltage equipment.

The purpose of the invention is to improve the accuracy of thermal stabilization of cooling objects and expand the range of application of the device.

Figure 1 shows the device, a general view; figure 2 - section aa in figure 1.

The evaporative-condensation system comprises a housing 1 with evaporation zones 2 and condensation 3 on the flat side walls of the housing associated with cylindrical portions. Between the condensation zones 3 and evaporation 2 with a shift towards the latter, an insert 4 is installed, made in the form of a wedge with rounded narrow and wide parts. The insert 4 forms with the evaporation 2 and condensation zones 3 slotted channels. The bimetallic plate 5 is thermally insulated from the coolant and electrically insulated from the insert 4, and the casing 1 is connected to it in a non-evaporation 2 device. Box 4 is supplied with a high voltage from an adjustable power source (not shown), and the walls of the case are grounded. In the wide part of the insert 4, there is an axis of rotation 6, and the end walls of the insert 4 are connected to the end walls of the housing 1 by flexible dielectrics69284

the channel from zone 2, is insulated from the coolant and electrically isolated from B. A dielectric stop 8 is installed on the side wall of the housing in zone 3. The power supply is connected to the housing with its poles and B. The plate perceives the heat flow directly from the side of the housing, moves B, changing the width of the slotted channel. As a result of this, the steam velocity and the field constituting part, the spray film of the condensate, change. 1 hp f-ly, 2 ill.

Kimi jumpers 7. From the side of the condensation zone 3 against the narrow part of the insert 4 on the side wall of the housing 1 there is a dielectric adjustable stop B. The ratio of the difference between the radii R and g rounding the insert 4 in the wide and narrow parts, respectively, to the width of the slot channel formed by the insert 4 and evaporation zone 2, is set in the range from 4 to 8. The lower limit of the ratio corresponds to the boundary of the boiling effect in the slotted channel, and the upper one - to the appearance of boiling conditions in the free volume in the zone opposite the narrow part of the insert 4.

The device works as follows.

The heat carrier, partially filling the space of the hermetic housing 1, is heated and transformed into steam in the slotted channel between the evaporation zone and the insert 4. Under the action of the forces of a non-uniform electric field, the heat carrier in the form of a vapor-liquid mixture with a high content of steam is pushed to the expansion side of the slotted channel, in the place of the smallest tension

FIELD, towards the condensation zone 3. In the latter, the steam content of the mixture is reduced by the removal of heat and the liquid phase becomes predominant. When the coolant reaches the gap between the evaporation zone 2 and the insert A, the cycle is repeated. In the evaporation zone 2, under thermal loads on the wall of the housing 1 at the end of the expanding part of the slot channel, where the highest vapor content of the mixture is observed, dry spots are formed, accompanied by an increase in the wall temperature. The bimetallic plate 5 senses the heat flow directly from the wall of the housing 1, ensuring minimal inertia of the system, and moves the insert 4, expanding the slot channel between it and the evaporation zone 2, retarding the onset of a boiling crisis and reducing the wall temperature in the evaporation zone 2 An increase in the width of the slotted channel reduces the intensity of the electric field during its evaporation 2, but this does not reflect the crisis situation, since in sufficiently long slotted channels the true volume does not change. Partial steam content. If necessary, the strength of the floor can be increased with an adjustable power source. At the same time, an increase in the temperature of the wall of the housing 1 leads to a decrease in the width of the channel between the condensation zone

3 and an insert 4. At the same time, the steam velocity and the field constituting it increase, the spray film of the condensate increases, but the other component that moves the condensate along the cooling surface decreases. Adjustable stop 8 allows the effect of a non-uniform electric field in the zone of Q- Q 3 to be kept within the required limits. Thus, the movement of the insert

4 Intensifies the condensation process and condensate with a lower temperature swarm enters the evaporation zone 2. Due to this, and also due to the increase in the width of the slotted channel between the evaporation zone 2 and the insert

4, the steam content and the temperature of the wall of the housing 1 in the evaporation zone 2, opposite the narrow part of the insert 4, decrease, and the insert 4 returns to its original position.

Claims (2)

1. An evaporative-condensation system comprising a housing with evaporation and condensation zones, formed by flat side walls, adjacent cylindrical sections and flat end walls, a movable insert installed in the housing, forming a slit channel with the side wall, a bimetallic plate associated with the insert and enclosure wall, and a power source connected by its poles to the enclosure and insert, characterized in that, in order to increase the accuracy of thermal stabilization and expand the range of application, the zone and steam and condensation are located on the flat lateral walls of the housing; a movable insert is installed between them with an offset to the side of the evaporation zone; it is made in the form of a wedge with rounded narrow and "i-focal" parts and flat end walls, provided with an axis of rotation in a wide part, the ratio of the difference of the radii of curvature of these fillets to the minimum width of the slotted channel between the insert and the evaporation zone is 4–8, the end walls of the insert are connected by flexible dielectric bridges with the end walls of the body, and The chimney bimetallic plate is placed in the slotted channel on the side of the evaporation zone, insulated from the heat transfer medium and electrically insulated from the insert. 2. The system according to claim 1, characterized in that a dielectric stop is installed on the side wall of the housing in the condensation zone. 4-4 OE7 (/ g. 2