DE102009010687A1 - Pipe system shifting method for heat pump for geothermal power generation in e.g. street, involves obstructing tubular loops with consumer connection points, and sectionally inserting loops in empty pipe openings of canalization pipes - Google Patents

Abstract

The method involves obstructing tubular loops (18) with consumer connection points (19, 20), where the tubular loops run along sewage canalization pipes (12). The tubular loops are sectionally inserted in empty pipe openings of the sewage canalization pipes. The tubular loops for individual consumers (21-28) are obstructed one below the other in partial covering in a longitudinal course. The sewage canalization pipes are shifted in a running process. Conduit pipes inside empty pipes are cast with attached filler or dusk. An independent claim is also included for a system of thermal power generation pipes for operating a heat pump.

Description

The The invention relates to a method of laying geothermal recovery pipe systems for heat pumps and a system of geothermal heat recovery pipes for the operation of heat pumps. In the mentioned Heat pumps become a liquid refrigerant in a geothermal heat exchanger of which through the Geothermal heated medium heated, it being goes into the gaseous phase under heat. Subsequently, it is driven in an electrometrically Compressor compressed and in a heating circuit heat exchanger condensed under heat extraction and expanded in a throttle. The energy required for the electric motor is low.

in the In the wake of the increasing use of renewable energy in terms of on the limited supplies of fossil fuels increasing importance It also requires economic exploitation for the exhaustion of geothermal energy (geothermal energy) provide.

The Geothermal energy is in this case of a liquid medium recorded, circulated in pipe loops in the ground and after heating a heat pump in the Range of consumers, in particular residential or residential heating Commercial buildings, is supplied. This is basically also a reversibility of the heat flow for the purpose of cooling the residential or commercial building by means of the heat pump possible, with house heat delivered to the ground becomes.

From the DE 10 2005 059 0042 A1 It is known to recover energy from buried pipelines and sewers by extracting exhaust air from these ducts and fed to a heat pump in a building. The specific heat of the exhaust air is low. Incidentally, the temperature level of the exhaust air varies greatly with the ambient temperature at the surface.

From the DE 33 48 006 C2 is the heat recovery from wastewater known, with wastewater and sewage are conducted in countercurrent in a two-part sewer, in which a sewage collecting pipe is laid in the sewer along the channel bottom. In this case, heat pump circuits for the operation of heating circuits are connected to the sewage collecting manifold, wherein the stubs run from and to the heat pump within larger Abwasserstichleitungen the buildings in which the heating circuits are installed, which are equipped with the heat pumps. The lines are complicated and require a special sewer system with two-part sewers for sewage on the one hand and sewage water on the other.

at an installation of individual geothermal heat pump systems in individual buildings are usually the pipe loops (Probes) placed in vertical depth bores near the building, which range in depths of 40 to 100 meters. The production of such Deep drilling is expensive and expensive.

Of the The present invention is based on the object, a method and to propose a system for geothermal energy and wastewater recovery, that is significantly cheaper than before described methods and systems.

The Task is solved by the objects of independent claims. In the dependent claims preferred embodiments are given.

According to a method for laying pipe systems for heat pumps for geothermal energy, be
installed in the production or renewal of sewer systems in the built for the sewage structures or sewer pipes pits, ditches or galleries along the sewage structures or sewer pipes running pipe loops with consumer terminals. Preferably, these pipe loops are installed substantially horizontally, with regular deviations from the straight course for generating turbulent flow can be provided, which leads to improved heat transfer.

Herewith It is possible on the production of the mentioned deep holes completely to renounce and especially in the development of new construction areas or in the rehabilitation of older sewage systems without any significant additional effort, all measures for laying the pipe loops for the medium for geothermal energy production or for wastewater recovery for a variety by consumers at the same time. This is at least a heating heat supply to consumers through the Ensure geothermal energy while for the coverage of heating heat spikes conventional Heating systems of low capacity are kept can (bivalent plants).

There Sewer systems on a life of the order of magnitude of 100 years are designed and many urban development areas first at the beginning of the 20th century with sewerage systems The opportunities are the invention Procedures for the current renovation of these sewerage systems to use for bringing and inventive Systems to install, currently extremely numerous.

Next the pure extraction of geothermal heat is suitable in application Laying techniques, ie the preservation of one not too far away from the cable loops to the Sewer pipes, also an energy recovery from the Wastewater heat of households and possibly from the Rain channel entries possible because both wastewater as well as rainwater constantly introduce heat.

In In a first embodiment, it is possible to provide that horizontal pipe grinding each for individual Consumers in at least partial overlap be laid in longitudinal extension. Here are sufficient Distances between the overlapping loops to extract sufficient geothermal heat per loop to be able to. The coverage of two or more Loops therefore requires relatively large pit or trench depths. The length of each loop is calculated according to the precalculated Heating energy demand of the corresponding consumer, that is designed the appropriate building.

To a first favorable embodiment is provided that the horizontal pipe grinding together with the sewage structures or Sewer pipes in a pit or trench padding or Stollen filling of filling material with opposite the pit, trench or Stollenaushub higher thermal conductivity be installed. This is especially the use of sands with small grain size or with hydraulic Binders mixed sands that increased one Have thermal conductivity.

To another embodiment, it is provided that the horizontal Pipe grinding together with the sewage structures or sewer pipes in open pits or trenches or in underground mines Stollen laid and together with these with a twilight be filled, that is with a backfilling with hardenable hydraulic binder through which the thermal conductivity in the area of the pipe grinding is improved. The used Dämmermaterial can in particular Here also an improved heat conduction from the sewer pipes Make sure to the pipe loops.

After all is it possible to use sewerage pipes, In whose walls conduits are drawn, and the pipe loops essentially inserted or retracted into these conduits To form pipes.

The Conduits are then used to improve heat conduction also within the conduits with a bound filler or dusk to shed tight, so that the Heat conduction from the soil via the sewage pipe is improved towards the loop tubes out.

According to one preferred embodiment, the sewer pipes laid in a jacking process, d. H. without ditching a ditch or make a stud. In the process, the sewer pipes become driven through the ground, usually from a launch pit up to a target pit. This method advantageously allows that Laying pipe systems in areas where the opening the surface is disadvantageous or impossible. According to a further preferred embodiment the conduits are inside the conduits with a bonded filler or twilight shed. This will be done in an advantageous manner the heat transfer between the sewer pipe or the surrounding soil and the pipe loop improved.

The Pipes of the pipe loops can be made of metal or of Plastic, z. For example, polyethylene. This concludes in particular, the flow and return connections to the consumers, that is the individual buildings one. The service life of the line loops is preferably the same how to design the sewer system itself. In selecting of the material are in addition to a good thermal conductivity to consider the costs of procurement and relocation.

At the Withdrawal of geothermal heat through the medium flowed through Pipe systems is characterized by the immediate proximity of sewer pipes from the wastewater new heat entered into the soil. Thus, the sewer system causes a balancing positive Energy input with regard to the extracted geothermal energy.

preferred Embodiments of the invention are in the drawings and are described below.

1 shows a part of a road train with a geothermal recovery pipe system according to the invention in plan view,

2 shows a cross section through a geothermal energy recovery system according to the invention in a first embodiment,

3 shows a cross section through a geothermal energy recovery system according to the invention in a second embodiment,

4 shows a cross section through a geothermal energy recovery system according to the invention in a third embodiment.

In 1 is part of a street with a section of a sewerage system 11 and four consumer points each 21 to 24 . 25 to 28 recognizable on each side of the sewerage system.

The sewer system 11 consists of a sewer pipe 12 , in the course of which two shafts 13 . 14 are arranged with an exit to the overlying road surface.

The pipe string 12 and the shafts 13 . 14 are in a ditch 15 installed, which has been filled after excavation of the pipe string with excavation or foreign material. In the area of the shafts 13 . 14 points the ditch 15 extensions 16 . 17 on. Inside the trench 15 is a complete pipe loop 18 recognizable, with a supply line 19 and a return line 20 to one of the consumers 26 connected. The consumers 21 to 28 represent buildings, being in the consumer 26 a heat pump system for geothermal heat recovery is installed.

The length of the pipe loop 18 extends in the present case on the property width of several of the individual consumers, so that when connecting a plurality of consumers are at least partially provided in the longitudinal extent overlapping pipe loops. The length of the pipe loop 18 is based on the calculated heat demand of the consumer 26 designed. It can be seen that the pipe loop 18 at approximately equal distance to the pipe string 12 and to the shafts 13 . 14 of the sewerage system 11 is relocated. Parts of other pipe loops that deal with the pipe loop 18 However, do not cover in the longitudinal direction, can be seen in the drawing.

In 2 is in a vertical section through a ditch 15 a part of the Rohrstran ges 12 as well as parts of two pipe loops 18 . 18 ' in the area of a consumer 26 that is, a building recognizable. The ditch 15 is after installation of the pipe string 12 and the pipe grinding 18 . 18 ' and the corresponding flow and return lines 19 . 20 partly with a filling 29 heaped up, which may have improved thermal conductivity compared to the original excavation. The still open part cross section 30 of the trench 15 can then be filled with the original excavated material of the trench. The filling is up to the planum surface 31 apply and compact on which, for example, a road surface can be applied.

In 3 is a vertical section through an inventive arrangement shown in a second embodiment, wherein a part of a pipe string 12 in a previously driven underground tunnel 15 ' runs, whose soles 32 is attached. The tunnel 15 ' is with a backfilling 29 ' filled up, in which a first pipe loop 18 above the pipe string 12 It can be seen that the flow and return lines 19 . 20 with a consumer 26 connected is. Below the pipe string 12 is a second pipe loop 18 ' at the same distance from the pipe string 12 recognizable, which can be connected as needed with another consumer.

The pipe string 12 may be composed of tubular sections of stoneware or of concrete in the longitudinal direction or be seamlessly made of cast-in-situ concrete by appropriate shuttering. The same applies to the sewage structures mentioned, which can be made of reinforced concrete of any kind.

In 4 is a section of a tubing in cross section 12 or a sewerage pipe 12 represented in the wall circumferentially distributed four Leerrohraussparungen 33 are provided. The pipes 18 a pipe loop according to the invention are after laying the pipe string 12 installed in the ground. The connections for supply and return line are not shown here. In the annular gap 34 between the Leerrohraussparung 33 and the tube 18 is a Vergießmittel pressed from hydraulic binder and cured. The sewer pipe 12 can be installed according to a preferred embodiment in a pre-drive procedure. For this purpose, it is neither necessary to excavate a ditch from the surface, nor a tunnel for laying the sewer pipe 12 manufacture. The sewer pipe 12 is driven through the earth during the excavation process, typically from a launch pit to a target excavation pit. In the propulsion method, a propshield with a corresponding drill head is used to allow propulsion through the soil. The excavated soil is from the drill head through the pipe string 12 conveyed through to the starting pit. By means of jacking presses, the propulsion shield and the trailing sewer pipes are used 12 pushed through the ground. As jacking pipes are suitable pipes made of stoneware, concrete, cement fiber concrete and polymer concrete.

11

sewer system

12

tubing

13

shaft

14

shaft

15

Dig, stollen

16

extension

17

extension

18

pipe loop

19

supply line

20

Return line

21

consumer

22

consumer

23

consumer

24

consumer

25

consumer

26

consumer

27

consumer

28

consumer

29

replenishment, backfilling

30

Grave cross section

31

Surface, Planum

32

Stollen sole

33

conduit

34

annular gap

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 1020050590042 A1 [0004]
• - DE 3348006 C2 [0005]

Claims (12)

Method for laying pipe systems for heat pumps for geothermal energy production, characterized in that in the production or renewal of sewerage systems along sewers ( 12 ) running pipe loops ( 18 ) with consumer access points ( 19 . 20 ), whereby the pipe loops ( 18 ) at least in sections in Leerrohrausnehmungen ( 33 ) of sewerage pipes ( 12 ) are inserted. Method according to claim 1, characterized in that the pipe loops ( 18 ) for individual consumers ( 21 - 28 ) are installed in each other at least partial overlap in the longitudinal course. Method according to one of claims 1 or 2, characterized in that the pipe loops ( 18 ) with regularly changing distance to the sewage structures or sewerage pipes ( 12 ), in particular in a serpentine course. Method according to one of claims 1 to 3, characterized in that the sewerage pipes ( 12 ) are laid in a tunneling process. Method according to one of claims 1 to 4, characterized in that the conduit within the conduits with a bound filler or twilight to be shed. System of geothermal heat recovery pipes for the operation of heat pumps, characterized in that pipe loops ( 18 ) with consumer access points ( 19 . 20 ) for individual consumers ( 21 - 28 ) along sewers ( 12 ), wherein the horizontal pipe loops ( 18 ) at least partially in Leerrohrausnehmungen ( 33 ) of sewerage pipes ( 12 ) are inserted. System according to claim 6, characterized in that the pipe loops ( 18 ) for individual consumers ( 21 - 28 ) are installed in each other at least partial overlap in the longitudinal course. System according to one of claims 7 or 7, characterized in that the pipe loops ( 18 ) with regularly changing distance to the sewage structures or sewerage pipes ( 12 ), in particular in a serpentine course. System according to one of claims 6 to 8, characterized in that the sewerage pipes ( 12 ) are laid by means of tunneling. System according to one of claims 6 to 9, characterized characterized in that the conduits within the conduits potted with a bound filler or twilight are. System according to one of claims 6 to 10, characterized in that the empty tube recesses ( 33 ) along the sewerage pipes ( 12 ) are arranged. System according to one of claims 6 to 11, characterized in that empty tube recesses ( 33 ) in a wall of sewerage pipes ( 12 ) are provided.