DE102007000915A1 - Ice formation preventing arrangement for e.g. ship, has hollow body filled with substance which vaporizes at lower end of tube and precipitates when temperature lies above freezing point - Google Patents

Abstract

The arrangement has a hollow body (4) forming parts of surfaces. The hollow body is connected with the surfaces in a thermal-conductive manner. The hollow body is connected to a tube (5) at a bottom section and the tube is deeply immersed into water (1) such that the tube is positively ends below an ice-formation zone. The hollow body is filled with a substance which vaporizes at a lower end (51) of the tube and precipitates when temperature lies above the freezing point.

Description

Technical environment

The The invention relates to an arrangement for preventing ice formation on the surface of objects that are on or over larger water bodies like rivers or lakes or swimming on them according to the preamble of the main claim.

On the decks of ships or boats and on jetties comes it is very often used especially at temperatures around the freezing point Ice formation or frost formation in the persons holding these surfaces enter, be endangered. The use of salts bans in most cases for reasons of environmental protection.

Already from the DE 3532542 A1 It is known to keep lanes and roads ice-free by geothermal heat is guided by means of heat pipes from deeper layers of earth in the pavement.

Also with the help of geothermal energy according to the DE 4036729 A1 the hoarfrost, ice or dew on display elements, in particular traffic signs but also windows are prevented. For this purpose, the geothermal heat must be guided with the help of a heat pipe or a heat pump to the back of the object.

When disadvantageous here is repeatedly listed that on Reason for the poor heat conduction of the soil and the relatively high, locally very different heat transfer resistance Energy is available only to a limited extent.

A much better energy yield provide methods by which the heat from rivers or stagnant waters can be taken, the here by several orders of magnitude higher Heat transfer coefficient, spatially equally distributed plays an important role. In addition, the effected by the arrangement artificially generated temperature gradient or an existing flow is another improvement the heat energy supply due to the increase of convective heat transport.

As an example of this is the DE 2937593 A1 called. This proposes to dissipate heat from waters by providing mat-shaped bodies that are used simultaneously for river bed, river bed or lake bed reinforcement, with channels through which a carrier medium is conducted to dissipate the heat. Use of recovered heat is not recommended.

Also the EP 1795830 A1 describes a device that serves to recover heating energy from the water of rivers, lakes or the sea, by passing this water with the help of a siphon into a well. From this well, the water is fed to a heat exchanger in which it is withdrawn by means of heat pumps, the heat.

With This elaborate process can be made from relatively cool water Heating energy to be won. For the solution task, the surfaces of objects, at or above larger water bodies like rivers or lakes or swimming on them ice-free, the known methods and devices are not suitable because they require additional energy for this.

Disclosure of the invention

Technical problem

task The invention is thus an arrangement for preventing the Ice formation on the surface of objects, at or above larger water bodies like rivers or lakes or swimming on them, propose that allows this without supplying additional power.

Technical solution

These The object is achieved by an arrangement having the features of the main claim solved.

An inventive arrangement for preventing the formation of ice on the surface of such objects, such as boat decks, the treads of webs or also located in the vicinity of bodies of water handrails can be created in that parts of these surfaces by hollow body ( 4 ) or with these hollow bodies ( 4 ) are thermally conductively connected.

These hollow bodies ( 4 ) are at their lowest point with a pipe ( 5 ) connected. This tube ( 5 ) goes so far under the water surface ( 2 ) that it certainly ends below the ice-forming zone. The pipe ( 5 ) and the hollow body are partly filled with a substance which at the temperature of the water body at the lower end ( 51 ) of the pipe ( 5 ) and condensed at temperatures above freezing. They thus form a known heat pipe. Due to the environmental compatibility of carbon dioxide is particularly suitable as a heat exchanger for this purpose, if the system is set so that the condensation temperature is a few degrees above 0 ° C.

at m decrease in the outside temperature is characterized in the upper hollow body the carbon dioxide condense and with the heat of condensation the surface temperature above the freezing point hold.

The Condensate flows down through the pipe and gets through the deep water warms and evaporates. This cools The water at the bottom of the pipe gets off and gets to bottom convection movement upwards depending on the ambient water temperature or discharged below.

By the large water reservoir is ensured that sufficient heat for the frost protection task is available.

When Hollow bodies are executed both as pipes supporting construction elements as well as double-walled trained flat elements for use. All can be achieved by the invention walk-on areas on boats, houseboats and over or built on the water structures protected from ice formation become.

A special field of application is the protection of the outer walls of watercraft against ice pressure. For this purpose, the outer wall is double-walled in the area of the waterline. The resulting cavity ( 4 ) serves as a condensation zone and is via a pipeline ( 5 ) with the evaporator zone arranged in the keel area ( 51 ) connected. It is assumed that the keel area is always located in a water zone whose temperature is much higher than 0 ° C, so that the evaporation and condensation of the heat exchanger, the ship's side is always heated to a temperature is melted by the adjacent ice.

Short description of drawings

The invention will be described below with reference to the drawings 1 to 3 will be explained in the form of three embodiments. It shows

1 one on two supports 3 mounted web, the side member as a hollow body 4 are executed,

2 a boat 7 whose top as a hollow body 4 is trained and

3 a boat 7 in which the outer wall is in the area of the waterline 2 as a hollow body 4 is designed.

The best way, the invention exploit

example 1

In a web according to the invention, shown schematically in the 1 can be seen, rest on the falls 3 as a hollow body 4 trained porters.

A pipe protrudes from the end facing away from the shore 5 to the bottom of the water 1 , This down pipe 5 is connected to the hollow bodies so that in the lower area 51 evaporating heat transfer medium in the hollow body 4 ascend and condense there. The in the hollow body 4 resulting condensation heat is applied to the overlying, heat-conducting tread plates 6 delivered, whereby these are kept largely free of ice.

Example 2

The walk-in area of a boat 7 is as a hollow body 4 educated. This is about a pipe 5 with one in the keel of the boat 7 arranged evaporator zone 51 connected. Here as well, evaporation and condensation transport so much heat into the deck that ice formation can be prevented.

Example 3

At a boat 7 is the outer wall of the waterline 2 starting down in an area that could be endangered by ice, double-walled executed. From this cavity again leads a tube 5 to the in the keel of the boat 7 arranged evaporator zone 51 , Hereby, the heat released during the condensation is used to melt ice lying on the boat.

1

reason of the water

2

water surface

3

Support

4

hollow body

5

pipe

6

tread plates

7

boat

51

evaporator zone

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3532542 A1 [0003]
• - DE 4036729 A1 [0004]
• - DE 2937593 A1 [0007]
• EP 1795830 A1 [0008]

Claims (3)

Arrangement for preventing the formation of ice on the surface of objects that float or on or over large bodies of water, characterized in that parts of these surfaces are formed by hollow bodies or thermally conductively connected thereto and that this hollow body at its lowest point with a pipe is so deeply immersed in the body of water that it ends with certainty below the Eisbildungszone and that the tube and the hollow body is filled with a substance which evaporates at the temperature of the water body at the lower end of the tube and at temperatures everywhere above Freezing point condenses. Arrangement according to claim 1, characterized that it is the items to be protected around outer walls of boats, walk-in areas built on such boats, on over or on water Structures acts. Arrangement according to claim 1, characterized that used as a heat transfer medium carbon dioxide whose pressure is adjusted so that the condensation temperature between 1 and 4 ° C.