Sewer with multifunctional conduit

Abstract

The invention relates to an arrangement (1) comprising a sewer (2) and a first conduit (3) which is laid within the sewer (2) along a course of the sewer (2) at least in one portion (A) of the sewer (2), wherein the first conduit (3) comprises a casing (5) and an electrical cable (8), wherein the electrical cable (8) of the first conduit (3) is arranged within the casing (5) of the first conduit (3) in such a way that an intermediate space (9) remains radially between the electrical cable (8) of the first conduit (3) and an inner side (6) of the casing (5) of the first conduit (3), and wherein the intermediate space (9) of the first conduit (3) is filled with a fluid (10).

Description

[0001] Sewer with multifunctional pipe

[0002] The invention relates to an arrangement and a method for operating the arrangement. The arrangement comprises, in particular, a sewer and a pipe laid therein.

[0003] Households are usually connected to a sewer on the one hand, and to lines for the power supply and for connections to the telephone network and the internet on the other. While there have been discussions about laying lines within a sewer, this can be challenging. A particular problem is that lines in a sewer are naturally exposed to the atmosphere above the wastewater. This atmosphere can contain substances that attack the lines, which can lead to damage, particularly in the form of corrosion. This is not only problematic in itself. What is even more problematic is that the atmosphere can be explosive. This is why a damaged cable in a sewer poses a safety risk.

[0004] The object of the present invention is to provide a way to lay a current-carrying cable in a sewer as safely as possible.

[0005] This object is achieved by the arrangement and the methods according to the independent claims.

[0006] According to the invention, an arrangement is presented. The arrangement comprises

[0007] - a sewer and

[0008] - a first line laid at least in a section of the sewer along a course of the sewer within the sewer, wherein the first line comprises a sheath and a power cable, wherein the power cable of the first line is arranged within the sheath of the first line such that a space remains radially between the power cable of the first line and an inner side of the sheath of the first line, and wherein the space of the first line is filled with a fluid.

[0009] The arrangement can be used to connect one or more households to the sewer on the one hand and to the mains on the other. The sewer is preferably designed for underground installation. The sewer is designed to transport wastewater. The nature of the wastewater is not important for the functioning of the arrangement. The wastewater can be, in particular, wastewater and / or rainwater. Accordingly, the sewer can be a wastewater sewer, a rainwater sewer, or a combined wastewater and wastewater sewer.

[0010] The first line is laid within the sewer. The term "first line" is chosen specifically to distinguish it from the second line described below. In the general configuration described here, it is not necessary for there to be another line in the sewer in addition to the first line. However, to keep the description consistent, the term "first line" is used here.

[0011] The first line is laid within the sewer, at least in a section of the sewer, along a course of the sewer. The first line can therefore extend over the entire length of the sewer or only over a portion of it. In practice, it is particularly preferred for the first line to be introduced into the sewer at a first point along the course of the sewer, transverse to the sewer, and to be led out of the sewer at a second point along the course of the sewer, transverse to the sewer.

[0012] The first line comprises the power cable. The power cable can have one or more electrically conductive cores that are electrically insulated from the power cable's surroundings. During normal operation, the power cable is live. One or more electricity consumers and / or one or more electricity generators can be connected to a power grid via the power cable of the first line. The electricity consumers and electricity generators can be households, power plants, industrial plants, or data centers. The power grid can, in particular, be a public power grid. A large number of households can be connected to one or more power plants via the power grid. In the definition chosen here, the power cable of the first line is not considered part of the power grid. This is for linguistic simplicity. It would also be possible to view the power cable as part of the power grid.

[0013] The power cable is primarily used to transmit electrical energy generated from renewable sources, such as photovoltaic or wind turbines. Although the way electrical energy is generated is irrelevant for the transmission of electrical energy, renewable energies are nevertheless characterized by the fact that they are usually generated in a decentralized manner. This is especially true for electricity from photovoltaic systems. The described arrangement is particularly well-suited for the distribution of decentrally generated electrical energy and, to that extent, particularly well-suited for the distribution of renewable energy. The described arrangement can thus contribute to achieving long-term energy independence and reducing the costs of electrical energy.

[0014] The first line further comprises a sheath. The power cable is arranged within the sheath of the first line. The sheath is formed circumferentially around the power cable.

[0015] The sheath and the power cable preferably extend over the entire length of the first line. However, this is not required. For example, it is conceivable for the power cable to be formed only in a longitudinal section of the first line. The fact that a gap remains radially between the power cable of the first line and an inner side of the sheath of the first line implies that the first line has at least one longitudinal section in which both the sheath and the power cable are present. Preferably, at least this longitudinal section lies in the sewer.

[0016] The sheathing serves to separate the power cable from the cable's surroundings, i.e., from the interior of the sewer. Thanks to the sheathing, the power cable is particularly well protected from the influences in the sewer. This already helps to prevent corrosion on the power cable and consequently to minimize the risk of explosion. The sheathing can prevent damage to the power cable. This is true on the one hand because the sheathing represents an additional barrier between the live wires of the power cable and the atmosphere in the sewer. On the other hand, this is also true because the sheathing surrounds the power cable in the fluid. The fluid can also prevent the power cable from being exposed to the atmosphere in the sewer.In the event of a minor leak in the sheathing, pollutants from the atmosphere in the sewer can enter the space between the sheathing and the power cable. However, these pollutants can be diluted and / or transported away by the fluid, thus preventing them from attacking the power cable.

[0017] By combining the power cable with the sheath and the fluid-filled space, the risk of explosion is minimized to such an extent that the desired possibility of laying a live cable safely in a sewer has been created.

[0018] The sheathing goes beyond conventional electrical insulation. Such insulation may already be part of the power cable itself. However, a space filled with the fluid remains between the power cable and the inside of the sheathing. Therefore, the sheathing does not fit tightly against the power cable on all sides, as would usually be the case with simple electrical insulation.

[0019] The power cable is separated from the interior of the sewer by both the fluid and the sheath of the first line. Added to this is the electrical insulation of the power cable itself. Should the sheath become damaged, the power cable generally remains unaffected. The fluid can only escape. However, the escaping fluid can then be directly drained away via the sewer. If a comparable line were laid directly underground, damage to the sheath could cause the fluid to enter the ground. Even if the fluid is not environmentally harmful, as is the case with water, for example, a large amount of escaping fluid can still cause damage. This risk does not exist with the described arrangement.

[0020] The fluid can, in particular, be gaseous, liquid, or have gaseous and liquid components. In particular, the fluid can be a heat transfer medium, for example water. The sheath of the first line can thermally insulate the fluid from the interior of the sewer. The sheath is preferably formed from a thermally insulating and / or protective material. Preferably, the sheath is formed at least partially from PE-HD. In particular, the sheath can be formed from a composite material, for example with an inner heat-insulating plastic and an outer shell made of PE-HD. The sole use of PE-HD is also possible, especially for low-temperature applications. The sheath can also be referred to as a protective pipe. Alternatively, the sheath can also be formed from a thermally conductive material.The fluid can also be used to exchange heat with the wastewater in the sewer. This can be used, in particular, to cool the wastewater. In this case, the first line can also be arranged under or in combination with a heat exchange element, e.g., made of stainless steel. For example, the first line can be connected to a heat exchange element arranged in the sewer in such a way that the fluid from the first line can be directed into the heat exchange element for heat exchange.

[0021] The fluid in the space between the first line is preferably under pressure. This can, in particular, be a static pressure that develops when the fluid flows through the first line.

[0022] It is generally irrelevant for the design of the arrangement whether the fluid is at rest in the intermediate space during operation of the arrangement or whether it is flowing through the intermediate space along the course of the first line. If the fluid is at rest, it fulfills the previously described function of shielding the power cable from the interior of the sewer. If the fluid flows through the intermediate space along the length of the first line, the first line can be used not only to transport electrical energy but also to transport the fluid. For example, a household can be supplied with the fluid via the first line. On the one hand, this can be the case if the household draws the fluid from the first line, for example as hot water. On the other hand, the household can also draw the fluid only temporarily, for example for heating or cooling. After an appropriate heat exchange, the household can release the fluid again.

[0023] The first line can therefore serve multiple functions. The first line can therefore also be referred to as a first multifunctional line. On the one hand, the first line can be used to transmit electrical energy. For this purpose, the first line has the power cable. On the other hand, the first line can be used to transport the fluid. It is particularly preferred for a household to exchange electrical energy with the power cable of the first line and to exchange the fluid with the first line. A single connection is then sufficient for two functions. It is also preferred for the household to also discharge wastewater into the sewer. The sewer with the line arranged therein can then even be used for three functions.In existing sewage networks, it may be more practical for reasons of space to lay the described multifunctional first line to the nearest house connection sewer and, for example, to drill a microtunnel from the house connection sewer to connect, for example, a household and establish a connection.

[0024] In a preferred embodiment, the arrangement further comprises a second line which is laid within the sewer at least in the section of the sewer along the course of the sewer.

[0025] In this embodiment, in addition to the previously described first line, a second line is also laid within the sewer. The second line is laid within the sewer at least in that section of the sewer along the course of the sewer in which the first line is also laid within the sewer along the course of the sewer. In this section, the first line and the second line therefore run parallel within the sewer.

[0026] The second line can extend over the entire length of the sewer or only over a portion of it. In practice, it is particularly preferred that the second line be introduced into the sewer at the above-mentioned first point along the sewer's course, transverse to the sewer, and be led out of the sewer at the above-mentioned second point along the sewer's course, transverse to the sewer.

[0027] The second line can be designed like the first line. However, this is not required. The second line can also be designed as a simple pipe, for example.

[0028] Like the first line, the second line can extend over the entire length of the sewer or only over part of it.

[0029] The first line and the second line can be used to transport the same fluid. This is particularly useful when the fluid is a heat exchange fluid such as water. For example, the first line can be used as a supply line from which the fluid is supplied to a household, and the second line can be used as a return line to which the household releases at least part of the fluid after a heat exchange with the fluid. In this case, the first line and the second line are part of a heating and / or cooling circuit. For example, the household can be connected to a district heating network and / or a district cooling network. The fluid transferred via the first line and the second line can be heating water. However, part of the fluid can also be taken from the household. In this way, the household can be supplied with hot water, in particular.

[0030] The household can also be connected to a power grid via the power cable of the first line. The power cable of the first line is sufficient for this purpose. It is not necessary for a power cable to be provided in the second line as well. However, this can still be useful for capacity reasons. This is especially relevant in the preferred case where more than one household is connected via the arrangement.

[0031] If, however, no power cable is provided in the second line, it is irrelevant whether the first line with the power cable is used as the supply line and the second line without a power cable as the return line, or vice versa. Therefore, it is preferred that the second line be used as a supply line, from which the fluid is supplied to the household, and the first line be used as a return line, to which the household at least partially releases the fluid after a heat exchange with the fluid.

[0032] The sheath of the second conduit can thermally insulate the fluid from the interior of the sewer. The sheath is preferably made of a thermally insulating and / or protective material. In this respect, the same applies to the second conduit as to the first conduit.

[0033] The fluid in the space between the second line is preferably under pressure. This can, in particular, be a static pressure that develops when the fluid flows through the second line.

[0034] It is also possible to use the first line as both a supply line and a return line. For this purpose, a separator can be provided, for example, which divides the space between the first line into two parts along the path of the first line. The first part can then serve as the supply line, and the second part as the return line.

[0035] The separating element can also secure the power cable. In such a configuration, the second line can be provided additionally. This makes it possible to simultaneously connect both district cooling and district heating using two connecting lines. For example, the first line would then form a district heating connection, and the second line a district cooling connection. The first line would then house a supply and return line for the district heating, and the second line would house a supply and return line for the district cooling.

[0036] However, as an alternative to the embodiment described here, the second line can also be omitted.

[0037] In a further preferred embodiment of the arrangement, the second line comprises a sheath and a power cable, wherein the power cable of the second line is arranged within the sheath of the second line in such a way that a space remains radially between the power cable of the second line and an inner side of the sheath of the second line, and wherein the space of the second line is filled with the fluid.

[0038] In this embodiment, the second line is designed analogously to the first line. In this embodiment, the second line therefore also comprises a power cable. The power cable can have one or more electrically conductive cores that are electrically insulated from the power cable's surroundings. During normal operation, the power cable is live. One or more households can be connected to a power grid via the power cable of the second line. This can be in addition to one or more households being connected to the power grid via the power cable of the first line. In the definition chosen here, the power cable of the second line is not considered part of the power grid. This is for the sake of linguistic simplicity. It would also be possible to view the power cable as part of the power grid.

[0039] As with the power cable of the first line, the second line also preferably transmits electrical energy that has been generated from renewable energies, for example from photovoltaic systems or wind turbines.

[0040] The second line further comprises a sheath. The power cable is arranged within the sheath of the second line. The sheath is formed circumferentially around the power cable.

[0041] The sheath and the power cable preferably extend over the entire length of the second line. However, this is not required. For example, it is conceivable for the power cable to be formed only in a section of the second line. The fact that a gap remains radially between the power cable of the second line and an inner side of the sheath of the second line implies that the second line has at least one section in which both the sheath and the power cable are present. In any case, this section lies in the sewer.

[0042] The sheathing serves to separate the power cable from the surrounding area of ​​the cable, i.e., from the interior of the sewer. In this respect, the statements made regarding the first cable apply accordingly.

[0043] The fluid in the space between the second line can be gaseous, liquid, or have both gaseous and liquid components. For example, the fluid can be water. It is generally irrelevant for the design of the arrangement whether the fluid is at rest in the space during operation of the arrangement or flows through the space along the course of the second line. In this respect, the statements regarding the first line also apply accordingly to the second line.

[0044] Like the first line, the second line can also serve multiple functions. Accordingly, the second line can also be referred to as a second multifunctional line.

[0045] In a further preferred embodiment of the arrangement, the power cable of the first line is held radially spaced in all directions from the inside of the sheath of the first line.

[0046] If the power cable is spaced from the sheath, the power cable is particularly well protected against damage. Due to the distance from the power cable, damage to the sheath does not directly lead to damage to the power cable. In general, the further the power cable is from the sheath, the better the power cable is protected. The power cable is preferably held centrally within the sheath. The sheath preferably has a circular cross-section. The power cable is preferably coaxial with the sheath.

[0047] The power cable can be held within the cable by spacers, for example. The spacers can keep the power cable at a fixed distance from the inside of the sheath. The spacers can be distributed along the length of the first cable, in particular at equal intervals of, for example, one meter.

[0048] If a second line with a power cable is also provided, the power cable of the second line is preferably kept radially spaced in all directions from the inside of the sheath of the second line. In this respect, the statements regarding the first line apply accordingly.

[0049] In a further preferred embodiment of the arrangement, the first line further comprises a telecommunication cable which extends at least over a part of a length of the first line and which is arranged within an outer side of the sheath of the first line.

[0050] The telecommunications cable can be used, in particular, to connect one or more internet users to the internet. These users can be households, but also industrial plants or data centers. In this respect, the arrangement in this embodiment can serve an additional function. In the present embodiment, the telecommunications cable is conveniently integrated into the first line.

[0051] The telecommunications cable is preferably a fiber optic cable. The use of fiber optic cables allows for very short latency times for the user. This is particularly advantageous for cloud applications, for example. However, the design of the telecommunications cable is generally irrelevant for the functionality of the described arrangement. Achieving particularly short latency times is particularly important when data centers, which, for example, operate outsourced cloud applications locally, are directly connected to households or users via the described telecommunications cable. This also allows for greater data protection, since the data does not have to be transmitted over long communication paths.

[0052] The telecommunications cable is arranged within the outer side of the sheath of the first line. The sheath is formed by material that is arranged between the outer and inner sides of the sheath. This material forms the wall thickness of the sheath. The fact that the telecommunications cable is arranged within the outer side of the sheath of the first line means that the telecommunications cable is either arranged entirely in the space between the power cable and the inner side of the sheath, partially arranged in this space and partially embedded in the sheath, or completely embedded in the sheath.

[0053] It is sufficient for the telecommunications cable to extend over part of the length of the first line. However, it is preferred that the telecommunications cable extend over the entire length of the first line.

[0054] It can be assumed that in the future, there will be an ever-increasing demand for computing power for various applications. This demand can be met, in particular, with decentralized data centers. Such decentralized data centers require very fast internet connections. In the present embodiment, this can be easily provided via the telecommunications cable. For this purpose, it is preferred that several decentralized data centers be connected to the telecommunications cable.

[0055] Using the described arrangement, for example, electrical energy from renewable sources can be transported from the outskirts of a city to the city center, particularly to a decentralized data center. The data center can serve as a heat source. The heat emitted by the data center can be distributed to households via the arrangement. At the same time, households can be connected to the internet and the power grid via the arrangement. The central data center can serve as a distribution hub for the internet and electrical energy. A further development is the ever-increasing efficiency of sewage treatment plants. Due to the increasing yields of biogas plants and the conversion of biogas into electricity by combined heat and power plants (CHPs), and the simultaneous installation of ever-increasing numbers of photovoltaic and wind turbine systems, sewage treatment plants are increasingly becoming net producers of heat and electricity.Here, the described arrangement can be used to transport excess energy in the form of heat and electricity through the existing main sewage collectors to the inner cities. In particular, the still common practice of flaring excess biogas or the discharge of environmentally harmful waste heat into rivers can be reduced and put to positive use.

[0056] There are also attempts in the field of energy storage to use sewage gases as an energy storage medium. In general, by combining electrical energy and thermal energy in the described arrangement, energy storage methods that store and release energy using heat, pressure, and steam, for example, can be used particularly efficiently.

[0057] In a further preferred embodiment of the arrangement, the telecommunications cable is at least partially embedded in the sheathing of the first line. If the telecommunications cable is fully or partially embedded in the sheathing material, the telecommunications cable is particularly well protected.

[0058] If a second line is also provided, the second line preferably further comprises a telecommunications cable that extends over at least part of a length of the second line and is arranged within an outer surface of the sheath of the second line. In this respect, the statements regarding the first line apply accordingly.

[0059] In a further preferred embodiment, the arrangement further comprises a safety device which is configured to monitor a pressure of the fluid in the intermediate space of the first line and to de-energize the power cable of the first line in response to a detected pressure drop of the fluid in the intermediate space.

[0060] If the sheath is damaged, fluid can escape from the space between the first line. This can be detected by the safety device. This can be done in various ways. In the simplest case, the safety device has a pressure sensor designed to measure the pressure of the fluid in the space between the first line. If the pressure sensor detects a drop in pressure, it can be concluded that the sheath is damaged. The safety device can then automatically de-energize the power cable of the first line. In this respect, the described arrangement is particularly safe. In this embodiment in particular, the problem of power cables in a sewer posing a safety risk is solved.

[0061] In this embodiment, the fluid in the space between the first line can be used to detect a leak in the casing of the first line. This applies regardless of whether the fluid in the first line is at rest or flowing along the course of the first line. In the latter case, the fluid can be used as such, for example as heating water, and can also be used to detect leaks. If a second line with a power cable is also provided, the safety device is preferably configured to monitor a pressure of the fluid in the space between the first line and a pressure of the fluid in the space between the second line and, in response to a detected pressure drop in the fluid in the space, to de-energize the power cable of the affected line. The safety device can be designed as a single unit or have a sub-unit for each of the first line and the second line.

[0062] As a further aspect of the invention, a method for operating an arrangement configured as described is presented, wherein a household exchanges electrical energy with the power cable of the first line and / or the household exchanges the fluid with the first line. The "and" case is preferred.

[0063] The described advantages and features of the arrangement are applicable and transferable to the method, and vice versa. The arrangement is preferably configured for operation according to the method. The method described here can be carried out with any arrangement configured as described above. In particular, it is sufficient for the arrangement to have the first line next to the sewer. Additional lines are not required.

[0064] The process can, for example, be carried out in winter and summer operation. In winter operation, regenerative wastewater heat can be used to supply local consumers with heat. However, too much heat should not be extracted from the wastewater to prevent the wastewater from being discharged into a sewage treatment plant at a level that is too cold, for example. Data centers, for example, can be used to generate additional heat. The data centers can, for example, be constructed as containers and distributed across a decentralized system. The data centers are preferably designed so that the waste heat from the data centers ensures the heat supply to the consumers. The waste heat can be heated to a desired level using heat pumps, for example. The heat can be supplied to the household connections via the first line (optionally also via the second line) in the sewer.Excess heat can also be fed into an existing district heating network.

[0065] In summer operation, for example, the waste heat from data centers and photovoltaic systems can be converted into cold using heat pumps, thus cooling the wastewater via the first line in the sewer. Local cooling can also be provided to households in this way. Alternatively, or (in the case of a second line) additionally, local heating can also be provided to households, for example, for hot water supply.

[0066] As a further aspect of the invention, a method for operating an arrangement designed as described is presented, wherein a household exchanges electrical energy with the power cable of the first line and / or the second line and the household exchanges the fluid with the first line and with the second line. The "and" case is preferred. In this method, it is further provided that - the first line is used as a feed line from which the household

[0067] Fluid is supplied, and the second line is used as a return line, to which the household releases the fluid at least partially after a heat exchange with the fluid, or - the second line is used as a supply line, from which the household receives the

[0068] Fluid is supplied, and the first line is used as a return line to which the household at least partially releases the fluid after a heat exchange with the fluid.

[0069] The described advantages and features of the arrangement and the previously described method are applicable and transferable to the method described here, and vice versa. The arrangement is preferably configured for operation according to the method described here. The method described here can be carried out with all embodiments of the arrangement that comprise at least the first line and the second line. The method described here covers two equivalent alternatives. In both cases, one of the lines is used as the supply line and the other as the return line.

[0070] In a preferred embodiment of one of the two described methods, the household also discharges wastewater into the sewer. Particularly in this embodiment, a single connection to the household is sufficient for multiple functions. In existing sewer networks, it may prove more practical for space reasons to lay the described first line to the nearest service connection sewer and to drill a microtunnel from the service connection sewer to connect, for example, a household. The invention is explained in more detail below with reference to the figures. The figures show a particularly preferred embodiment, to which the invention is not limited. The figures and the proportions depicted therein are merely schematic. They show:

[0071] Fig. 1: an arrangement according to the invention in a cross section, Fig. 2: a representation which illustrates in side view an inventive method for operating the arrangement from Fig. 1.

[0072] Fig. 1 shows an arrangement 1 comprising a sewer 2, in which wastewater 17 can be conducted. The arrangement 1 also comprises a first line 3 and a second line 4, which are each laid in a section A (marked in Fig. 2) of the sewer 2 along a course of the sewer 2 within the sewer 2. Fig. 1 shows a cross-section of the sewer 2 within section A.

[0073] The two cables 3, 4 each comprise a sheath 5 and a power cable 8, which each extend over a total length L lfL2 of the respective line 3, 4. In each of the two lines 3, 4, the power cable 8 is arranged within the sheath 5 of the corresponding line 3, 4 in such a way that a gap 9 remains radially between the power cable 8 of this line 3, 4 and an inner side 6 of the sheath 5 of this line 3, 4. In each of the two lines 3, 4, the power cable 8 is kept radially spaced in all directions from the inner side 6 of the sheath 5 of the corresponding line 3. In each of the two lines 3, 4, the gap 9 is filled with a fluid 10.

[0074] The first line 3 serves as a supply line 15. The second line 4 serves as a return line 16. During operation of the arrangement 1, the fluid 10 flows in opposite directions through the two lines 3, 4. Furthermore, both lines 3, 4 each have a fiber optic cable as a telecommunications cable 11, which extends over the length L1, L2 of the corresponding line 3, 4 and which is arranged within an outer side 7 of the sheath 5 of the corresponding line 3, 4. In both lines 3, 4, the telecommunications cable 11 is partially embedded in the sheath 5.

[0075] Fig. 2 illustrates a method for operating the arrangement 1 from Fig. 1. It can be seen from Fig. 2 that the arrangement I is connected to several households 13.

[0076] Households 13 can exchange electrical energy 18 with the power cable 8 of the first line 3 and with the power cable 8 of the second line 4. This allows households 13 to be supplied with electrical energy 18, for example, from a power plant 14, preferably for renewable energy. However, households 13 can also feed electrical energy 18 into the power cable 8 of the first line 3 and into the power cable 8 of the second line 4. This is possible, for example, if the respective household has a photovoltaic system.

[0077] The households 13 can also exchange the fluid 10 with the first line 3 and with the second line 4. In particular, the first line 3 can be used as a supply line 15, from which the fluid 10 is supplied to the households 13, and the second line 4 can be used as a return line 16, to which the households 13 each release at least part of the fluid 10 after a heat exchange with the fluid 10.

[0078] Furthermore, the arrangement 1 has a safety device 12 which is designed to monitor a pressure of the fluid 10 in the intermediate space 9 of the first line 3 and the second line 4 and, in response to a detected pressure drop of the fluid 10 in the intermediate space 9 of one of the lines 3, 4, to de-energize the power cable 8 of the affected line 3, 4.

[0079] Households 13 can also discharge wastewater 17 into sewer 2. Wastewater 17 can then be transported to a sewage treatment plant 19.

[0080] Households 13 can therefore use the order 1

[0081] ■ be supplied with electrical energy 18 from a power grid,

[0082] ■ in case of surplus electrical energy 18 feed it into the power grid,

[0083] ■ be supplied with hot water, for example for heating, ■ be supplied with cold water, for example for cooling, and

[0084] ■ be connected to the Internet.

[0085] List of reference symbols

[0086] 1 arrangement

[0087] 2 sewer

[0088] 3 first line

[0089] 4 second line

[0090] 5 Sheathing

[0091] 6 Inside

[0092] 7 Outside

[0093] 8 power cables

[0094] 9 gap

[0095] 10 Fluid

[0096] 11 Telecommunications cables

[0097] 12 Safety device

[0098] 13 household

[0099] 14 Power plant

[0100] 15 Lead-up

[0101] 16 Return

[0102] 17 Wastewater

[0103] 18 electrical energy

[0104] 19 sewage treatment plant

[0105] Section A

[0106] Lq Length of the first line -2 Length of the second line

Claims

Claims 1. Arrangement (1) comprising - a sewer (2) and - a first line (3) which is laid at least in a section (A) of the sewer (2) along a course of the sewer (2) within the sewer (2), wherein the first line (3) comprises a sheath (5) and a power cable (8), wherein the power cable (8) of the first line (3) is arranged within the sheath (5) of the first line (3) in such a way that an intermediate space (9) remains radially between the power cable (8) of the first line (3) and an inner side (6) of the sheath (5) of the first line (3), and wherein the intermediate space (9) of the first line (3) is filled with a fluid (10).

2. Arrangement (1) according to claim 1, further comprising a second line (4) which is laid at least in the section (A) of the sewer (2) along the course of the sewer (2) within the sewer (2).

3. Arrangement (1) according to claim 2, wherein the second line (4) comprises a sheath (5) and a power cable (8), wherein the power cable (8) of the second line (4) is arranged within the sheath (5) of the second line (4) in such a way that a space (9) remains radially between the power cable (8) of the second line (4) and an inner side (6) of the sheath (5) of the second line (4), and wherein the space (9) of the second line (4) is filled with the fluid.

4. Arrangement (1) according to one of the preceding claims, wherein the power cable (8) of the first line (3) is held radially spaced in all directions from the inner side (6) of the sheath (5) of the first line (3).

5. Arrangement (1) according to one of the preceding claims, wherein the first line (3) further comprises a telecommunications cable (11) which extends at least over part of a length (L-, ) of the first line (3) and which is arranged within an outer side (7) of the sheath (5) of the first line (3).

6. Arrangement (1) according to claim 5, wherein the telecommunication cable (11) is at least partially embedded in the sheath (5) of the first line (3).

7. Arrangement (1) according to one of the preceding claims, further comprising a safety device (12) which is designed to monitor a pressure of the fluid (10) in the intermediate space (9) of the first line (3) and to de-energise the power cable (8) of the first line (3) in response to a detected pressure drop of the fluid (10) in the intermediate space (9).

8. A method for operating an arrangement (1) according to any one of the preceding claims, wherein a household (13) exchanges electrical energy (18) with the power cable (8) of the first line (3) and / or the household (13) exchanges the fluid (10) with the first line (3).

9. A method for operating an arrangement (1) according to one of claims 2 to 7, wherein a household (13) exchanges electrical energy (18) with the power cable (8) of the first line (3) and / or the second line (4), and the household (13) exchanges the fluid (10) with the first line (3) and with the second line (4), wherein the first line (3) is used as a supply line (15) from which the fluid (10) is supplied to the household (13), and the second line (4) is used as a return line (16) to which the household (13) at least partially releases the fluid (10) after a heat exchange with the fluid (10), or the second line (4) is used as a supply line (15) from which the fluid (10) is supplied to the household (13), and the first line (3) is used as a return line (16) to which the household (13) (10) after a heat exchange with the fluid (10) at least partially releases again.

10. The method according to claim 8 or 9, wherein the household (13) also discharges wastewater (17) into the sewer (2).

Images