DE102004018480B3 - Arrangement for operating a geothermal heat recovery device comprises a pressure regulating unit arranged between a special system and a condenser and a return flow preventing unit arranged within the special system - Google Patents

Abstract

Arrangement for operating a geothermal heat recovery device comprises a pressure regulating unit (15) arranged between a special system and a condenser (17) and a return flow preventing unit (11) arranged within the special system. An independent claim is also included for a process for operating a geothermal heat recovery device using the above device. Preferred Features: The channel (10) for introducing a working material (8) is connected to the upper to middle region of the channel leading to the evaporating working material and the return flow preventing unit.

Description

The The invention relates to a method and an arrangement for operation a geothermal energy plant for warming (Heating) of components and work surfaces.

to Achieving a frost-proof operation of outdoor or unheated clear arranged components and work surfaces, these in known Way heated with electric power, steam or flame.

These activities require a high investment and control technical and fuel expenses and thus a high operating cost.

Furthermore are these measures due to the environmental conditions considerably susceptible to faults.

In order to reduce the operating costs, it is possible to use a geothermal recovery plant with a vaporizable agent in a closed system ( EP 1194723 B1 ,

to Realization of this solution However, it still requires a considerable regulatory and technical equipment Effort and still considerable Operating costs expenses.

Characteristic of the invention

Of the Invention is based on the object, a simple cycle in a probe system and a vaporizable agent for recovery of heat energy to create that completely and always works and maintains without external energy as well in the process always maintains a certain temperature level. This is achieved in that according to the invention, the working substance in the probe system pressure controlled and positively driven is charged.

to Realization according to the invention between the probe system and the capacitor, a pressure control device and within the probe system, a backflow prevention device arranged.

Advantages of the invention

to Heating of components and work surfaces outdoors or in unheated rooms such as switches in track systems, bearing arrangements on bridges, driving and runways or their parts, underground car park entrances, footpaths and Platforms and staircases, for securing a frost-free Operation generally, this simple cycle process is special suitable, as no external energy is needed after a single Setting a certain working pressure is a certain working temperature self-adjusting and self-sustaining the cycle preserved. The invention is particularly suitable for components and work surfaces, the more difficult to access are.

embodiment

The Invention will be explained in more detail with reference to the drawings of exemplary embodiments.

The Drawings show:

1 : a schematic representation of the device

2 : a schematic representation of the device as a variant

Description of the embodiment

1 shows a device according to the invention for the use of geothermal heat with a first channel 10 in which the working substance 18 down below the earth's surface and with a second channel 13 , in which the working substance is directed upwards, back to the earth's surface. The first channel 10 is formed by a tube that goes up in the channel 13 plugged in and at the entry point 20 the channel 13 closes tightly. The working substance 18 flows through the backflow preventer on its way down 11 to get over a subsequent piece of pipe 19 from the outflow opening 12 in the second channel leading upwards 13 enter. This second channel 13 is firmly closed at the bottom and only has a top exit point, which is the beginning of the channel 14 forms.

In the channel 13 , which is suitably embedded in the soil, evaporates the agent because of the prevailing pressure conditions under the influence of geothermal energy.

The steam leaves the channel 13 to get over the channel 14 to the pressure control device 15 to flow. This is adjustable and opens only when the pressure in the channel 13 reaches or exceeds a certain threshold.

Thereafter, the vaporous working fluid flows 18 over a canal 16 in a condensation device 17 in which it condenses by heat removal, for example, for heating purposes and optionally under the Condensation temperature is cooled. The now again liquid agent 18 re-enter the channel 10 and start the cycle from the beginning. He constantly takes with regulated pressure in the channel 13 Geothermal heat and transports them in the manner described above, this useful and re-enters the cycle.

When building the device becomes the channel 13 after drilling a hole in sections concentrically installed in this. The tight connection of the sections to a complete channel 13 is done by welding, soldering or by various other methods known to those skilled in the art.

The channel 10 will be in the completed channel 13 plugged in and in the place 20 sealed after the backflow preventer 11 and the channel piece 19 also connected by suitable methods tightly together and in extension to the channel 10 were grown. With the other components 14 . 15 . 16 . 17 The procedure is the same, so that a self-contained, through-flowable and environment-tight system of several channel sections and built-in parts is formed.

Expediently, by the person skilled in the tightness of the system, for example by applying an internal overpressure to the environment by means of the valve 21 checked.

After that, the system is over the valve 21 to evacuate and after successful evacuation with the agent 18 to fill.

Is the temperature on the heat-receiving side of the capacitor 17 lower than the pressure regulator 15 corresponding to the set pressure evaporation temperature in the channel 13 , the device sets itself in operation and starts with the heat supply. By damming a column of liquid in the channel 10 the friction pressure losses occurring along the entire flow path are compensated. The higher the column of liquid in the channel 10 accumulated, the greater the temperature difference between the evaporation temperature in the channel 13 and the condensation temperature in the condenser 17 without the process coming to a standstill.

2 shows a variant of the in 1 illustrated device. The substantially same components are numbered by the same reference numerals. The operation of the device is with the in 1 shown device identical. The difference is that the channel 10 , in which the working fluid flows down, separately next to the canal 13 is led down. This can be done in a second hole or in the same hole that is receiving the channel 13 serves, done. The bodies 12 and 20 coincide thus. Production, function and commissioning can be carried out by the person skilled in the art from the description of the device according to FIG 1 be derived.

The dimensions of the channel 13 according to 1 For example, in its clear width 100 mm and in its length 90 m, the clear diameter of the channel 10 and the channel 19 each 15 mm. As vaporizable agent 18 Propane is used. The clear diameter of the channels 14 and 16 be exemplary 50 mm. The channel 10 protrudes in the exemplary embodiment about 17 m in the channel 13 into it. Will the exemplary arrangement with a sufficient amount of the working substance 18 filled, so at rest, a pressure of about 6.5 bar abs. one. If the temperature of the working substance decreases 18 in the condenser 17 below 10 ° C, the heat supply starts automatically. By appropriate adjustment of the pressure control device 15 can be achieved that the temperature of the heat delivery and thus the temperature in the channel 13 not under z. B. 4 ° C drops. Then it flows into the condenser 17 never working substance 18 with a lower temperature than z. B. 4 ° C a. The pressure regulator 15 thus protects the probe in the ground against excessive cooling, which would be useless for a frost-free near the installation of the capacitor and spares the natural resources of existing at the installation geothermal potential for use for the intended purpose, without interrupting the heat supply.

10

channel

11

Backflow preventer

12

Discharge point / exit point

13

channel

14

channel

15

pressure regulator

16

channel

17

condensation device or capacitor

18

working substance

19

channel

20

Built-compacted Job

21

Valve

22

Storage jar

Claims (8)

Method for operating a geothermal heat recovery plant for heating (heating) of components and work surfaces, wherein a vaporizable agent receives soil heat via a probe system introduced into the ground and releases groundwater through condensation, characterized in that the working substance ( 18 ) in the probe system pressure-controlled and positively driven beauf is struck. Arrangement for operating a geothermal heat recovery system for heating (heating) components and work surfaces, wherein a vaporizable agent absorbs geothermal heat via a probe system introduced into the ground and transmits overground by condensation, characterized in that between the probe system and the condenser ( 17 ) a pressure control device ( 15 ) and within the probe system a backflow prevention device ( 11 ) are arranged. Arrangement according to claim 2, characterized in that the probe system as channels ( 1 ) is trained. Arrangement according to claim 2, characterized in that the probe system consists of separate channels ( 2 ) is formed. Arrangement according to one of claims 2 to 4, characterized in that the working substance ( 8th ) introducing channel ( 10 ) in the upper to middle region of the vaporized working substance and the backflow prevention device leading channel ( 13 ) is involved. Arrangement according to one of Claims 2 to 5, characterized that several probe systems are arranged in a group. Arrangement according to one of claims 2 to 6, characterized in that in the working substance introducing channel ( 10 ) a storage vessel (22) is involved. Arrangement according to one of claims 2 to 7, characterized in that the capacitor ( 17 ) structurally adapted to be heated (heated) components and work surfaces.