DE102009005985A1 - Combined wind energy and heat storage system for use in residential buildings, has wind rotor, heat accumulator filled with heat storage medium, particularly water, and heating generator driven by wind rotor - Google Patents

Abstract

The combined wind energy and heat storage system (2) has a wind rotor (4), a heat accumulator (8) filled with a heat storage medium, particularly water (W), and a heating generator (6) driven by the wind rotor. The heat accumulator is placed above the ground and forms a tower-like or platform-like carrier structure for the wind rotor. The height of the heat accumulator over the ground averages about 5 to 20 meter.

Description

The The invention relates to a combined wind energy and heat storage system with a wind rotor, one with a heat storage medium, preferably water, fillable heat storage and a wind rotor driven heat generator, wherein Means for transferring the heat released by the heat generator Heat energy to the heat storage medium in the heat storage are provided. The invention further relates to a for an insert in such a system particularly suitable heat storage.

A combined wind energy and heat storage system of the type mentioned above is from the German Offenlegungsschrift 2,931,484 known. When there in 2 a wind rotor is arranged on a tower-like support structure and drives a mechanical heat generator. The heat energy released in this way is transferred to a stored in a heat storage tank heat storage medium according to the principles of heat exchange. The heat energy stored in this way is made available, as required, to consumers in a spatially nearby residential building via further heat exchangers and pipe systems. The heat storage is placed underground or buried in the ground and forms a kind of foundation for the arranged thereon separate support structure.

From that Based on the object of the invention, a combined Wind energy and heat storage system of the type mentioned specify, in which the construction effort in the establishment especially is kept low. Furthermore, one should be for this purpose particularly suitable heat storage can be specified.

In Reference to the wind energy and heat storage system is this object is achieved according to the invention by that the heat storage - at least for the largest Part - is placed above ground and a tower-like or podium-like support structure for the wind rotor forms.

The Invention is based on the consideration that a groundcovered or underground installation of the heat accumulator though especially regarding the achievable heat insulation is favorable, but that on the other hand a considerable Expenditure for the excavation of the soil and for the construction of the separate support structure for the wind rotor is required. According to the invention forms now the heat storage tank itself the tower or the pedestal for the rotor. A large-scale excavation at the Site is no longer necessary. Rather, it is enough a rather small-volume excavation for a comparatively flat foundation on which the storage tank above ground is placed. Furthermore, no separate tower or lattice tower be erected for the wind rotor.

The Erection altitude of the wind rotor is a crucial one Factor for the yield of a wind turbine, as in higher Air layers caused by roughness (building and flora) Turbulence is substantially reduced and the wind more even and stronger blowing. On the other hand, should be in the height design the heat accumulator the with increasing tank size and height disproportionately increasing constructive Effort to derive the static and dynamic forces not disregarded and in energy terms meaningful Storage volume should not be exceeded. For this Basically, the height of the heat storage is about Reason advantageously about 3 m to about 20 m. Correspond to this in a substantially cylindrical container shape with Diameters of about 1 m to 3 m storage volumes of, for example around 5,000 L to 50,000 L. The wind rotor can be used accordingly an electrical equivalent power (in an imputed Generator operation) of - depending on the wind force - 1,000 W be designed to 15,000W.

advantageously, is the heat storage a vertically mounted tank with a cylindrical outer surface made of pressure-resistant steel or the like, in particular stainless steel, alternatively made of a plastic. At its lower end, the tank is more convenient and proven design a dome or dome-shaped Ground on, at its upper end a corresponding cover.

In an advantageous development comprises the steel or plastic tank at the bottom - in a sense as an extension the cylindrical enclosure wall - a over the lowest point of the floor extending Auflagering or Sheath section, over which the tank is on the ground or supported on a foundation.

Farther is preferably in the region of the support ring an annular flange to the Formed shell or the support ring or welded to this, about its circumference a plurality of abutments for in the ground or foundation anchored anchor elements is formed. For example can in the annular flange passages be provided through which the upper part of the screw thread provided anchor elements inserted through and with a lock nut or the like is secured.

For a particularly reliable and reliable anchoring of the heat storage on the foundation of the projecting into the soil or foundation part of the respective anchor element expediently U-shaped and advantageously secured by a recessed into the ground or foundation cross bolt.

to Achievement of such anchoring will be expediently when not yet at its destination position tank container First, the bolt portions of the anchor elements through their associated openings of the annular flange stuck through and provisionally from the top, each with a lock nut secured. The thus prepared tank container is then for example, with a crane or the like on a prepared and hardened foundation lowered, which recesses for Has on acceptance of the anchor elements. After the alignment of the anchor elements selbige are preferably secured with a respective transverse pin. After all the remaining spaces are in the recesses with concrete or another hardening casting material potted, advantageously an intimate connection of the casting material achieved with the remaining foundation. After curing of the casting material, the lock nuts can finally be tightened.

In Another preferred embodiment, the steel or plastic tank one over the highest point of the dome-shaped or dome-shaped lid extending beyond mounting ring or shell section on, the extent of an extension the cylindrical peripheral wall of the tank forms upward, and the priority for receiving and fixing the wind rotor and / or the driven by him heat generator is used.

advantageously, namely, the heat generator is in a lateral Direction from the mounting ring and down from the lid of the steel tank limited reception room arranged.

In In an alternative embodiment, the heat generator However, also arranged in the interior of the heat accumulator be. In this case, the height of the mounting ring optionally be chosen correspondingly smaller. In this variant is the heat generator expediently over a guided through the container wall drive shaft connected to the top of the container arranged wind rotor. The shaft bushing is expediently suitably sealed.

For good accessibility of the wind rotor and the heat generator is preferably a walk-platform on the attachment ring attached. To reach the platform is expediently on the outside of the container shell a ladder assembled. For a good accessibility of the heat generator can continue in the mounting ring suitable doors or window provided.

In Particularly suitable embodiment, the wind rotor has a vertical Rotation axis and is in particular as a Savonius rotor or designed as a Darrieus rotor. Such rotors are occasionally also called a wind turbine.

Just then, if the mechanical heat generator directly above the container lid is arranged and a vertical to has top facing drive axle, whose extension The axis of the wind rotor forms are a particularly simple structure and a simple installation of the entire system realized.

Further Advantages of a Savonius rotor are in particular the independence from the wind direction, so no tracking required is, extensive storm and turbulence security, operational capability even at comparatively low wind speeds and before all the barely perceptible running noise, so a Use is also possible in residential areas without further ado.

to Smoothing load changes and increasing the power output may in particular a multi-leaf blade arrangement and / or a coupling of a plurality of superimposed Rotors or rotor segments may be provided. Furthermore you can if necessary, known guide elements for flow concentration be used.

For a particularly effective conversion of the rotational energy of the wind rotor in useful heat, the heat generator is advantageous designed as a hydrodynamic retarder in which a rotating Paddle wheel (rotor) supplied thermal oil or another, preferably liquid, heat transfer medium accelerates and presses against a fixed paddle wheel (stator). By friction or by the viscosity of the heat transfer medium This kinetic energy is converted into heat and the Rotor braked. When the rotor and the stator of the retarder do not touch directly, the material wear is low held. For suitable coordination of the speeds and the torques of drive axle (wind rotor) and retarder rotor, the re tarder or the brake gear with a lower or transmission gear be provided.

The thermal oil is preferably conducted in a circuit from the retarder to a heat exchanger, also referred to as a heat exchanger, and back to the retarder. The heated in the retarder thermal oil gives the heat absorbed in the heat exchanger to the in a feed or charging line to the heat storage heat storage medium supplied, preferably water from.

The Heat storage medium of the heat storage is itself expediently in a cycle from the heat storage to the heat exchanger and back to the heat storage led, so that - from inevitable losses apart - no consumption of the heat storage medium he follows.

The Removal of the cooled heat storage medium takes place according to the heat storage adjusting temperature stratification preferably at the lower end in the area of the soil, the repatriation of the im Heat exchangers heated heat storage medium at upper end near the lid.

about the primary loading and unloading connections the heat storage advantageously has a plurality from mounted at different heights in the mantle area Connection piece, to the corresponding in the heat storage adjusting temperature stratification and according to the desired Withdrawal and return temperatures Discharge or return lines are connected. The heat storage medium located in the heat storage medium can be used directly for heating purposes, such as for a static Residential heating or underfloor heating, be used and is in a corresponding heating circuit guided. If a domestic water heating provided is, this is done by means of expediently another heat exchanger, the primary side from the warm heat storage medium and secondary side flows through the hot water. This further heat exchanger can be installed externally from the wind energy and heat storage system be.

Of the for heat transfer from the mechanical heat generator (Retarder) on the heat storage medium in the heat storage provided heat exchanger is advantageously structurally in the wind energy and heat storage system, in particular in the heat generator, integrated.

In the alternative case that the heat generator in shape a retarder integrated directly into the storage container is and the heat storage medium located therein directly heats up, the said heat exchanger is natural not mandatory.

Farther can optionally have additional charging ports be provided. Over this, the store can use thermal energy from other processes than wind power. This can z. B. Photovoltaic systems, geothermal processes (heat pumps) etc. be.

to Limitation of an above-ground outdoor installation unavoidable heat loss is the heat storage tank preferably on all sides, preferably also on the lid and on the floor, from a heat insulating jacket, preferably from a foamed Heat insulation material, surrounded. The thermal insulation material in particular, on the outside of the mounting ring be attached to the inside heat generator or retarder from unwanted heat loss to protect.

To the Protection against sunshine-induced UV radiation, which is the insulation material permanently damage or impair its effect could, advantageously, the heat-insulating jacket a UV-absorbing or reflecting outer skin on.

In Reference to the heat storage is the aforementioned Task solved by a heat storage for recording a heat storage medium, the one for a preferably above-ground vertical installation designed steel or plastic tank with a cylindrical shell, with a dome-shaped or dome-shaped bottom and with a dome-shaped or kalottenförmi gene cover, wherein the jacket at the bottom of a low above the lowest point Bodens outward extending Auflagering includes, over the the tank when installed on the ground or on a Foundation supports, and wherein the jacket at the upper end a fastening ring with fasteners for a Energy converter, in particular a wind rotor comprises.

The particular advantages of the invention are that by using a as a heat storage for a heat storage medium serve - the steel tanks as a tower or pedestal for one with a heat generator for the heating of the heat storage medium operatively connected Windrotor a particularly compact, with low material costs to be built and mechanically stable wind energy and heat storage system can be produced, which is particularly suitable for the use in the domestic or small commercial area suitable.

One Embodiment of the invention will be described below a drawing explained in more detail. Show in it in each case highly schematized and not to scale Shape:

1 a longitudinal section through a wind energy and heat storage system with a wind rotor, a wind rotor driven by the heat generator and a heat storage,

2 an enlarged view of the heat storage alone,

3 a cross section through the heat storage according to 2 , and

4 a detail from 2 relating to the anchoring of the heat accumulator.

Same Parts are provided with the same reference numerals in all figures.

This in 1 in a longitudinal section shown wind energy and heat storage system 2 includes a wind rotor, also referred to as a wind turbine 4 , a mechanical heat generator, also referred to as a friction heat generator 6 drives. In a preferred embodiment, that in the heat generator 6 released heat according to the principles of heat exchange to a heat storage medium, here water W, transfer, which in a heat storage 8th stored in the heated state and kept for later use as a heating medium.

The wind energy and heat storage system 2 according to 1 is designed for a particularly compact design and easy installation. This is the wind rotor 4 together with the heat generator 6 waiving a separate support structure, such as a lattice mast or the like, directly on the above-ground heat storage 8th arranged. The heat storage 8th rather serves itself as a supporting structure or as a tower or pedestal and provides for a sufficient and meaningful operating height for the wind rotor 4 ,

In the embodiment according to 1 is the heat storage 8th who in 2 once again magnified and selected in 3 shown in cross-section, one above ground on a foundation 10 mounted steel tank 12 with a flameproof enclosure made of stainless steel or a similar material. The steel tank 12 has as part of its surrounding wall a cylindrical shell 14 , the up or down by a dome-shaped or dome-shaped lid 16 or soil 18 is completed. cover 16 and soil 18 are each with the coat 14 welded. The steel tank 12 is vertically positioned, that is, its axis of symmetry A is vertically aligned. For the purpose of setting up on the foundation 10 , which is in particular a concrete foundation, extends the cylindrical shell 14 over the joint (weld) to the ground 18 out down and forms there an extended shell section or Auflagering 20 , The steel tank is supported exclusively by the support ring 20 on the foundation 10 from, so lies at the lowest point of the soil 18 not with it on the foundation 10 on.

For a safe and stable installation, even with relatively high static and dynamic forces, is the heat storage 8th at several points of its circumference by means of anchor elements 22 with the ground or the foundation 10 anchored. As from the partially sectioned detail according to 4 and the cross-sectional view according to 3 indicates are in the foundation 10 anchor members 22 let in, each having a U-shaped bent end portion 24 exhibit. This end section 24 is by one also in the foundation 10 taken in cross bolt 26 or a crossbar additionally secured. The other end of the respective anchor element 22 protrudes vertically upwards from the foundation 10 out and is designed in the manner of a bolt with end-side external thread. The ones from the foundation 10 outstanding sections of the anchor elements 22 are through associated passages 28 or bushings in an annular flange 30 led, the outside of the support ring 20 the heat storage 8th is welded. That from the passage opening 28 outstanding end piece of the respective anchor element 22 is by a screwed lock nut 32 secured.

Instead of a ring flange 30 who the bearing ring 20 surrounds completely, could also individual bulges with openings for the anchor elements 22 be provided. Furthermore, for improved stability of the heat accumulator 8th on the foundation 10 a widened annular bottom flange 34 between the support ring 20 and the foundation 10 be provided, for example, to the support ring 20 molded or welded to this.

At the top is the cylindrical shell 14 of the steel tank 12 over the highest point of the lid 16 extended and forms there a cylindrical sleeve, hereinafter also as a mounting ring 36 designated. The one from the mounting ring 36 and the lid 16 enclosed space used in the embodiment shown here to accommodate the heat generator 6 , above which in turn the wind rotor 4 is arranged. For fastening the heat generator 6 and the wind rotor 4 can have extra braces and the same on the mounting ring 36 be appropriate, which, however, in 1 and 2 for the sake of simplicity are not shown.

For a good accessibility of the wind rotor 4 For inspection and maintenance purposes, for example, is on the mounting ring 36 , For example, at its upper end, a walk-in platform 38 mounted on the outside of the heat accumulator 8th mounted ascent ladder 40 is achievable (only in 2 shown). The work platform 38 and / or the ladder 40 can with Siche be provided for the user, such as a railing or the like.

To minimize heat loss is the heat storage 8th on all sides with a heat insulation jacket 42 , z. B. of a foamed heat insulation material provided. The sheath also extends in particular to the ground 18 and the lid 16 of the steel tank 12 as well as on the heat generator 6 receiving or laterally enclosing mounting ring 36 ,

The wind rotor 4 is preferably designed as a Savonius rotor, in which between two horizontal cover plates 44 two or more - seen in profile - essentially semicircular curved wings or blades 46 offset from each other, so that the on the wind rotor 4 acting wind the blades 46 set in rotation about the vertical axis of rotation coinciding with the axis of symmetry A. Depending on the dimensioning of the heat accumulator provided as the supporting structure, the rotor diameter can be, for example, 1 m to 5 m, its height for example 1 m to 10 m. Notwithstanding the schematic representation in FIG 1 In a manner known per se, a plurality of such rotor modules can also be arranged or stacked vertically one above the other, which are coupled to one another in terms of movement, and which together drive the vertically aligned drive shaft 48 drive.

The drive shaft 48 is at its lower end turn with the rotor 50 a hydrodynamic retarder 52 connected, here as a heat generator 6 acts. The rotor 50 is a stator 64 opposite in one with a heat metransportmedium, here thermal oil T, filled housing 66 arranged. By the rotation of the drive shaft 48 becomes the rotor 50 in rotation and thus the thermal oil T in motion and to a certain extent "whisked", so that the thermal oil T heats up as a result of its viscosity. A subset of the thus heated thermal oil T flows through, preferably driven by an oil feed pump 67 , one to the housing 66 of the retarder 52 connected circulation line 68 , Via a primary side in the circulation line 68 switched heat exchanger 70 which deviates from the in 1 also shown structurally in the housing 66 of the retarder 52 can be integrated, the thermal oil T gives the absorbed heat energy for the most part to a heat storage 8th supplied heat storage medium, here water W, from.

For this purpose, powered z. B. by an electric circulation pump 72 , via a sampling line 74 cold water W at a temperature of for example 30 ° C from the lower, near-ground region of the container volume of the heat accumulator 8th taken and preferably in countercurrent to the primary side flowing thermal oil through the secondary side tube bundles or lines of the heat exchanger 70 guided. That from the heat exchanger 70 exiting heated water W is via the charging line 76 the heat storage 8th supplied at the top, lid-side end. The formation of a stable temperature stratification in the z-direction and a temperature homogenization in the lateral direction (perpendicular to the z-direction) is arranged by a near the lid, with the charging line 76 connected ring distributor 78 supported. Accordingly, the removal of the cold water W takes place near the bottom via a ring inlet 80 ,

The thermodynamic design of the system is preferably chosen so that the temperature of the heated water W in the heat storage 8th does not exceed the boiling point. As in 1 indicated, the temperature of the stored water is in the upper region of the heat accumulator 8th for example 70 ° C to 90 ° C, in the middle range around 50 ° C to 70 ° C and in the lower range around 30 ° C to 50 ° C.

For appropriate regulation of the in the sampling line 74 and in the charging line 76 circulating amount of water, for example, a control valve 82 be arranged in this wiring harness, which, for example, depending on the outlet temperature of the water W at the heat exchanger 70 , measured by the temperature sensor 84 , is driven (the causal connection is in 1 indicated by a dashed line). Alternatively or additionally, the circulation pump could also 72 be suitably controlled via an electronic control device on the basis of said input value and / or other measurement parameters.

In the jacket area of the heat accumulator 8th are here, only indicated schematically, more connections or connecting pieces 86 . 88 and 90 for removal and return of the heat transfer medium (water W) from different temperature zones. The return of the returning water W is preferably carried out in the temperature zone corresponding to its return temperature temperature zone or height of the heat accumulator 8th , The extracted water W is used, for example, for heating drinking or service water (connection 86 ), for static heating (connection 88 ) and for underfloor heating (connection 90 ) from Z. B. residential buildings. The drinking or service water, however, is not directly the heat storage 8th taken. Rather, this is in the heat storage 8th stored hot water W used to heat the drinking or service water via another, not shown here heat exchanger. Furthermore, additional connecting pieces may be present be seen, the z. B. measuring points, etc. form.

In one of 1 variant embodiment, which is not shown here, the heat generator 6 also directly in the interior of the heat storage 8th be arranged. In this case, it is the heat generator 6 with the wind rotor 4 connecting drive shaft 48 for example, by a suitably sealed recess in the lid 16 the heat storage 8th passed. In a direct heating of the heat storage 8th held heat storage medium, without the "detour" via a thermal oil, can then on the heat exchanger 70 according to 1 and the associated connection lines are omitted.

In another possible modification, not shown here is, the heat storage could also be underground be placed and at its upper end a heat generator carry, in turn, of a above him above ground arranged in a flow channel or river water wheel is driven.

2

wind and heat storage system

4

wind rotor

6

heat generator

8th

heat storage

10

foundation

12

steel tank

14

coat

16

cover

18

ground

20

Support ring

22

anchor element

24

end

26

cross bolt

28

Through opening

30

annular flange

32

locknut

34

bottom flange

36

fixing ring

38

platform

40

ladder

42

Heat insulation jacket

44

cover plate

46

shovel

48

drive shaft

50

rotor

52

retarder

64

stator

66

casing

67

Oil pump

68

circulation line

70

heat exchangers

72

circulating pump

74

withdrawal line

76

charging cable

78

ring distributor

80

ring inlet

82

control valve

84

temperature sensor

86 88, 90

connection

A

axis of symmetry

T

thermal oil

W

water

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 2931484 A [0002]

Claims (19)

Combined Wind Energy and Heat Storage System ( 2 ) with a wind rotor ( 4 ), with a heat storage medium, preferably water (W), can be filled heat storage ( 8th ) and one from the wind rotor ( 4 ) driven heat generator ( 6 ), means for transferring the heat from the generator ( 6 ) released heat energy to the heat storage medium in the heat storage ( 8th ) are provided, characterized in that the heat storage ( 8th ) is erected above ground and a tower-like or podium-like support structure for the wind rotor ( 4 ). Wind energy and heat storage system ( 2 ) according to claim 1, wherein the height of the heat accumulator ( 8th ) above ground about 5 m to about 20 m. Wind energy and heat storage system ( 2 ) according to claim 1 or 2, wherein the heat storage ( 8th ) a vertically mounted steel tank ( 12 ) or plastic tank with a cylindrical shell ( 14 ). Wind energy and heat storage system ( 2 ) according to claim 3, wherein the steel tank ( 12 ) or plastic tank at the lower end of a dome-shaped or dome-shaped bottom ( 18 ), and wherein the jacket ( 14 ) one over the lowest point of the soil ( 18 ) extending support ring ( 20 ) over which the tank ( 12 ) on the ground or on a foundation ( 10 ) is supported. Wind energy and heat storage system ( 2 ) according to claim 4, wherein in the region of the support ring ( 20 ) an annular flange ( 30 ) to the coat ( 14 ) is formed or welded to this, on the circumference of a plurality of abutments for in soil or foundation ( 10 anchored anchor elements ( 22 ) is trained. Wind energy and heat storage system ( 2 ) according to claim 5, wherein the soil or foundation ( 10 ) projecting part of the respective anchor element ( 22 ) Is U-shaped and penetrated by a ground or foundation ( 10 ) recessed cross pin ( 26 ) is secured. Wind energy and heat storage system ( 2 ) according to one of claims 3 to 6, wherein the steel tank ( 12 ) or plastic tank at the upper end of a dome-shaped or dome-shaped lid ( 16 ), and wherein the jacket ( 14 ) one over the highest point of the lid ( 16 ) extending fastening ring ( 36 ), at which the wind rotor ( 4 ) is attached. Wind energy and heat storage system ( 2 ) according to claim 7, wherein the heat generator ( 6 ) in a laterally direction from the mounting ring ( 36 ) and down from the lid ( 16 ) of the steel tank ( 12 ) is arranged limited receiving space. Wind energy and heat storage system ( 2 ) according to claim 7 or 8, wherein on the fastening ring ( 36 ) a walk-in platform ( 38 ) for the inspection of the wind rotor ( 4 ) and / or the heat generator ( 6 ) is attached. Wind energy and heat storage system ( 2 ) according to claim 9, wherein on the outside of the jacket ( 14 ) a ladder ( 40 ) to reach the working platform ( 38 ) is mounted. Wind energy and heat storage system ( 2 ) according to one of claims 1 to 10, wherein the wind rotor ( 4 ) has a vertical axis of rotation and is designed in particular as a Savonius rotor or as a Darrieus rotor. Wind energy and heat storage system ( 2 ) according to one of claims 1 to 11, wherein the heat generator ( 6 ) a hydrodynamic retarder ( 52 ). Wind energy and heat storage system ( 2 ) according to one of claims 1 to 12, in which the heat generator ( 6 ) for heating a heat transport medium, preferably thermal oil (T), is designed, and wherein for the transmission of heat energy from the heat transport medium to the heat storage medium, a heat exchanger ( 70 ) is provided. Wind energy and heat storage system ( 2 ) according to one of claims 1 to 13, wherein a charging line ( 76 ) for supplying heated heat storage medium in the region of the upper end to the heat accumulator ( 8th ) connected. Wind energy and heat storage system ( 2 ) according to one of claims 1 to 14, having a plurality of connecting flanges ( 86 . 88 . 90 ), according to the in the heat storage ( 8th ) are adjusting temperature stratification and the desired withdrawal or return temperatures withdrawal or return lines are connected. Wind energy and heat storage system ( 2 ) according to one of claims 1 to 15, wherein the heat accumulator ( 8th ) of a heat insulation jacket ( 42 ), preferably of a foamed heat insulating material, is surrounded. Wind energy and heat storage system ( 2 ) according to one of claims 1 to 16, wherein the heat-insulating jacket ( 42 ) Absorb a UV rays having reflective or reflective outer skin. Heat storage ( 8th ) for receiving a heat storage medium comprising a steel tank designed for vertical installation ( 12 ) or plastic tank with a cylindrical shell ( 14 ), with a dome-shaped or dome-shaped bottom ( 18 ) and with a dome-shaped or dome-shaped lid ( 16 ), wherein the jacket ( 14 ) at the lower end one over the lowest point of the soil ( 18 ) extending support ring ( 20 ) over which the tank ( 12 ) when installed on the ground or on a foundation ( 10 ) and wherein the jacket ( 14 ) at the upper end a fastening ring ( 36 ) with fastening elements for an energy converter, in particular a wind rotor ( 4 ). Use of a heat storage ( 8th ) for a heat storage medium serving steel tanks ( 12 ) or plastic tanks as a tower or pedestal for one with a heat generator ( 6 ) for heating the heat storage medium operatively connected wind rotor ( 4 ).