SU1758155A1 - Ice platform - Google Patents

Abstract

Application: in the construction of ice bases, dams, mooring walls on the shelf of freezing seas. Essence: the ice on the platform consists of an ice mass, including the central part 1 and the peripheral part 2. On the side surface of the massif there is an ice protection cover with 3 and heat insulating sheath 4. The volume of the massif is cooled by thermosyphon 5 and B. The heat supply areas are installed inside the massif, and the heat removal areas outside. The lower and upper parts of the heat supply areas of the thermosyphons installed in the central part 1 and the peripheral part 2 of the array are connected in pairs or groups by branch pipes; la may be combined. During the warm period of the year, the heat removal areas are shut off. External heat flow causes the peripheral part of the array to heat up. Due to the temperature difference that has arisen, heat from the peripheral part enters the central part of the array. Temperature equalization occurs in the bulk of the array and the temperature of its peripheral part decreases. 3 Il.

Description

(L

WITH

The invention relates to the construction and construction of ice platforms in the polar seas.

The purpose of the invention is to increase reliability and reduce costs for the construction of the platform.

Figure 1 shows the ice on the platform; Fig. 2 shows a horizontal section of the platform sector at the level of nozzles; an embodiment is a recessed portion of one thermosyphon located in the peripheral part of the platform connected to the recessed parts of two thermosyphons located in the central part of the platform; in FIG. 3, in FIG. 2, an embodiment — the recessed portions of two thermo-siphons located in the peripheral part of the platform are connected to the four recessed portions of the four thermosyphons located in the central part.

The ice on the platform contains an ice massif that includes the central part 1 and the peripheral part 2, ice protection at 3, the heat insulating casing 4, thermosyphons 5 located in the central part 1 of the ice massif and thermosyphons 6 located in the peripheral part 2 of the ice massif. Thermosyphons 5 and 6 are vertically located in the ice massif and have sections 7 and 8, buried to the entire height of the ice massif and the upper parts 9 and 10; located on the upper non-submerged part of the ice massif. The recessed portions 7 and 8 are interconnected by horizontal pipes 11 in the upper and lower parts. Execution options soo.

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ate

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unity thermosyphon horizontal pipes 11 are shown in figure 2 and 3.

Ice on the platform works as follows.

In the frosty season, the temperature of the ice massif decreases with the help of thermosyphons 5 and 6. The buried parts 7 and 8 of thermosyphons 5 and 6 cool the ice of the central part 1 and the peripheral part 2 of the ice of the massif, and from the upper sections 9 and 10 of the thermosyphons 5 and 6 heat dissipates into the surrounding atmosphere. The recessed portions of 7 thermosyphons 5 located in the central part 1 and the recessed portions of 8 thermosyphons b located in the peripheral part 2 of the ice massif are hydraulically connected with the help of horizontal nozzles 11. This hydraulic connection leads to the equalization of the temperature of the ice surrounding the buried portions 7 and 8 of thermosyphons connected by horizontal nozzles 11. When the temperature of the ice around, for example, the buried portion 7 of thermosyphon 5 located in the central part decreases, the temperature exceeds The recessed portion 8 of the thermosyphon 6 located in the peripheral part, and the thermosyphons are connected by horizontal nozzles 11, the following occurs. The heat carrier of the buried portion of the thermosyphon located in the central part of the array has a greater density than in the peripherally located buried portion and, therefore, will flow through the nozzles located in the bottom zone of the platform into the buried portion of the thermosyphon located in the peripheral part of the array. On the pipes located in the platform area facing the upper surface of the array, the coolant will flow from the recessed area of the peripheral thermosyphon to the recessed area of the central thermosyphon. At the same time, the temperature of the ice surrounding the buried part of the thermosyphon of the peripheral part 2 will decrease, and the temperature of the ice around the buried part of the thermosyphon located in the central part of array 1. - to rise.

At the onset of the warm period, the upper portions of the 9 and 10 thermosyphons are cut off. The shutdown occurs due to the fact that the coolant, enclosed in the upper frequent, takes the temperature of the surrounding air, which is higher than the temperature of the ice surrounding the buried parts 7

and 8. At the same time, the density of the coolant in the upper sections 9 and 10 becomes lower than in the buried areas 7 and 8, and the circulation of the coolant from the upper sections 9

and 10 thermosyphons to the recessed termination. In the same period, the outer surface of the platform is exposed to thermal heat dissipation.

Thermal resistance to external

0 the heat flux is determined by the heat exchange conditions on the upper surface of the platform and the outer surface of the ice protective sa 3, the thermal resistance of the ice protective sa 3 and the heat 5 of the insulating shell 4. An increase in the temperature of the peripheral part 2 of the ice mass leads to a temperature difference between the central part 1 and the peripheral part 2 of the ice

Q array. At the same time, the temperature of the ice surrounding the buried parts of 8 thermosyphons 6 located in the peripheral part 2 becomes higher than the temperature of the ice around the buried parts 7 of the thermo5 siphons 5 in the central part 1 of the massif.

According to the described mechanism, the temperature of the ice massif is equalized, i.e. cooling the peripheral part 2 of the array by increasing the temperature

0 central part of array 1. Such a redistribution of heat allows the peripheral part of the array 2 to be maintained for a certain time in the frozen state. In order to use a larger array

5 cold ice in the process of thermal stabilization of the peripheral part 2 in the frozen state to the recessed areas 8 of thermosyphons 6, located in the peripheral part 2, using horizontal

0 nozzles 11 connect a larger number of buried parts of 7 thermosyphons 5 from the central part of array 1, which is shown in Figs 2 and 3.

With the onset of the frost period

5, the upper sections 9 and 10 of thermosyphons 5 and 6 are activated, and the central and peripheral parts of the forest massif are cooled. Thus, the cycle is repeated.

0 The installation of horizontal nozzles 11 makes it possible to use the potential of cold accumulated during the frosty period in the central part of array 1 to compensate for the thawing effect of external heat on the peripheral part 2 in the warm period of the year.

Compensation of the thawing effect of external heat due to the cold potential of the central part of array 1 reduces the thickness of the heat insulating material by 30-50%, and in some cases rejects it completely, which reduces the cost of acquiring and installing thermal insulation. At the same time The location of the horizontal nozzles 11 in the area of the platform facing the upper surface of the array solves the problem of thermal stabilization of the peripheral layer of ice facing the upper surface. In addition, it is possible to more rationally place heat removal areas, namely, to exclude the placement of heat removal areas on the central part 1 of the platform surface. This solution also smoothes the thermal stresses in the ice massif by equalizing the temperatures over the volume of the massif.

Claims (1)

The invention of the Ice on the platform, mainly for the shelf of the polar seas, including // Do ///// 7 / yr // S //// 7 / eleven 1 the central and peripheral parts of the ice massif, surrounded by ice-protective catches and insulating sheathing, thermosyphons, the buried parts of which installed on the entire height of the ice massif, and the upper parts of the thermosyphons are placed on the upper unconfined surface of the ice massif, which is different in that reliability and reduction of costs for the construction of the platform, the buried parts of thermosiphons located in the central part and in the peripheral part of the ice massif are in pairs or groups connected to each other with the help of horizontally located in the upper and lower levels of the branch pipes, while in the lower level the horizontal branch pipes are located in the lower the bottom of the ice massif, and in the upper level, in the area of the platform facing its upper surface. FIG. 2 // //