WO2012079609A1

WO2012079609A1 - Heat exchanger panel as a two-phase thermosyphon

Info

Publication number: WO2012079609A1
Application number: PCT/EP2010/007733
Authority: WO
Inventors: Friedrich Grimm
Original assignee: Schoch Edelstahl Gmbh
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2012-06-21

Abstract

The invention relates to a heat exchanger panel (3) for air conditioning the air in a room. A heat exchanger panel (3) has a pressure container (2) that is encapsulated with respect to the atmosphere and to which a negative or positive pressure can be applied, having an inner working chamber (10) for receiving a working medium (11), wherein the pressure container (2) has an outer working surface (12) which, on at least one side, is in contact with the air in the room. The working chamber (10) has an upper and a lower region, wherein a sump (100) is provided in the lower region and a condenser (101) having at least one heat exchange medium pipe (300) through which a heat exchange liquid (301) flows is arranged in the upper region. In the case of cooling, the working medium (11) picks up heat from the working surface (12) and condenses as a gas phase (111) on the condenser (101), transferring heat to the heat exchange liquid (301), so that the heat from the air in the room can be carried away from the room by using the heat exchange liquid (301).

Description

description

Heat exchanger panel as a two-phase thermosyphone

The invention relates to a heat exchanger panel for conditioning the air in a room, which operates on the physical principle of a two-phase thermosiphon. Within the scope of the invention, the term "space" encompasses interiors such as living quarters, living and working spaces, machine, laboratory and measuring rooms, but also subterranean spaces such as tunnels and tunnels Cooling zone to the heating zone to use gravity, referred to as gravity-assisted heat pipes, as wicked

Heat pipes and in English as "wickless heat pipes." Conventional air conditioning systems for the provision of comfortable indoor air temperatures require considerable energy expenditure and require carbon-containing energy sources for their operation

Housing, especially in residential buildings in southern countries, requires cooling in the summer, a higher energy consumption than the heating of the rooms in winter. to

Conditioning of indoor air in office buildings are

Ventilation systems provided in which the air supplied to the room is preheated or cooled. Fewer

Energy-intensive are so-called cooling ceilings and cooling walls as elements of a space limitation, where water in one

close-meshed and large-scale arranged hydraulic structure circulates to the indoor air temperature in a convective

Lower exchange with the room air. The necessary pipeline network is complex in production and operation.

An energy saving option for air conditioning

Interior is the use of solar generated heat, which on a building envelope, e.g. by means of vacuum tube collectors,

is won. The high temperatures resulting from solar radiation can be measured in absorption or adsorption heat. exchangers are used to generate cold, which is then supplied to the interior, for example via a ventilation system.

The operating principle of a heat pipe consists in the transport of heat of vaporization in a continuous evaporation and condensation cycle within a relative to the

Atmosphere hermetically sealed pressure vessel, which persists as long as there is a temperature gradient between a heating zone and a cooling zone. In a two-phase thermosiphon, gravity is used to return the condensate from the cooling zone to the heating zone. A two-phase thermosiphon has a large heat transfer capacity and can absorb or release heat even at small temperature differences between a heat transfer fluid and the environment. In this case, due to the existing pressure difference, the working medium flows from a warm section in the lower area to a colder area in the upper section, where it condenses and releases its latent enthalpy of vaporization. These

Efficient heat transfer takes place within a completely passive element without any mechanical moving parts. A two-phase thermosyphone works silently and is maintenance and wear-free.

Known applications for a heat pipe originally developed for space travel are e.g. the cooling of electronic components, such as the processor in a computer, or e.g. effective component cooling in electric motors and e.g. also the waste heat utilization. Are known solar panels with a flat absorber element, in which solar heat generated by the principle of a two-phase thermosiphon on a

Heat transfer fluid is transferred.

Such a solar collector is apparent from DE 103 08 993 Al. A trained as a corrugated plate absorption surface with a sunlight-absorbing coating, which is vacuum-tightly connected to a strike plate forms one here Flat plate solar absorbed heat on one

Heat transfer fluid transfers.

From DE 30 41 710 a radiator for buses is apparent in which a plate heater is proposed, which operates on the principle of a heat pipe, wherein the plate heater is supplied at its lower end heat.

From DE 31 44089 a plate-shaped radiator is also known, consisting of a plurality of parallel side by side

arranged, vertical heat pipes, the working medium passes by means of a heating tube at the lower end of the plate heater in a gas phase.

task

Based on the illustrated prior art is the

The invention has for its object to use the physical principle of a two-phase thermosiphon in a preferably vertically arranged and large-sized Wärmetauscherpaneel for the air conditioning of an interior. It serves a

Heat exchanger panel of the discharge of unwanted excess heat from a room, the room air temperature can be lowered by several degrees Celsius.

It is a particular object of the invention to provide a large area

Specify heat exchanger panel on the outer surface heat is absorbed in a convective heat exchange with the room air. By heat conduction, the absorbed heat passes into a negative pressure working space inside the

Wärmetauscherpaneels. Even at a room air temperature of less than 25 ° C occurs in the working space of a heat exchanger panel for the phase change of the working fluid from liquid to gaseous. At rest of the thermosiphon, the working fluid is as a liquid in a sump at the bottom of the heat exchanger panel. By absorbing heat through the work surfaces, it goes into the gas phase and flows to a condenser at the upper end of the heat exchanger panel, there to transfer the heat absorbed through the heat transfer tube to the heat transfer fluid and to condense. Even a slight temperature gradient, for example 10 ° C, between the room air and the heat transfer fluid, which preferably consists of cool water, is sufficient to dissipate heat from a room. The greater the temperature difference between the room air and the heat transfer fluid, the more heat can

be recorded and derived. Possibilities for controlling the heat capacity of a heat exchanger panel therefore exist in a pre-cooling of the heat transfer fluid or else in an increased mass flow of the heat transfer fluid within the

Heat transfer tube. In general, however, the temperature difference between a room air temperature> 25 ° C and e.g. the groundwater temperature or the temperature of the

Tap water for effective cooling of the room air.

This object is achieved with the features mentioned in claim 1 of a heat exchanger panel.

Further advantageous properties and embodiments of the invention will become apparent from the dependent claims.

A heat exchanger panel according to the invention can be used both for the

Cooling case and be provided for the heating case. With a separate heating circuit at the lower end of the panel, a phase change of the working medium is effected in the heating case, which is only slightly above the desired at a flow temperature

Room air temperature is, goes into a gas phase and as a low-temperature radiant heating large heat to a room. In this case, the working medium condenses and flows automatically back into the bottom of the heat exchanger panel. Both for the

Cooling case, as well as for the heating case as large as possible contact of the heat exchanger panel with the room air is required.

For the arrangement of a heat exchanger panel according to the invention within a space are within the scope of the invention

different variants proposed:

A wall panel can thus be integrated into a wall structure that communicates with the room air only on one side. in the Fall of a heat sink therefore has a hot and a cold side. This temperature stratification can be used for the formation of a warm side facing the flow chamber and the cold side facing return chamber to support the forced convection of the working fluid within the work space. When using profile sheets as

Spacers between the cover shells of a pressure vessel result in flow and return chambers in an alternating change. In the area of the sump, the individual flow and return chambers communicate with each other, so that a pressure equalization can take place within the panel.

A heat exchanger panel mounted at a distance from the wall has the advantage that it is convectionally bathed on all sides by the room air and is therefore particularly well suited to absorb heat from the room air. The difference between the room air temperature and the temperature of the heat transfer fluid defines the heat capacity of a heat exchanger panel. If the temperature difference is too large, condensate can form on the surface of a heat exchanger panel. To collect the condensate is a gutter at the bottom of the panel

proposed. To get the best possible wetting of the

To ensure working space with the working medium, the cover shells of a heat exchanger panel may have horizontal, projecting into the working space beads at which collect small amounts of condensate to make a thermally conductive contact with the work surface. The pressure vessel of a heat exchanger panel can be equipped with a pressure relief valve in case of fire and with a closable evacuation nozzle for the control of the vacuum. For a heat-conducting connection between the work surface and the working medium of the working space with a capillary

Structure lined with the working medium

is saturated. This layer can also be supported, for example, on the beads projecting into the working space. As the working medium, an alcohol, for example methanol or ethanol, is proposed, the no corrosive effect on a pressure vessel

Stainless steel causes. In the case of water as a working medium, a galvanic coating of the working space with copper is proposed in order to prevent possible corrosion.

A partition wall panel may be formed as an element of a system structure for a variable interior design. In this context, the edge formation of the wall panels of

Meaning to make connections to doors, glass panels and cabinets. In this case, also quickly releasable hydraulic connections between the heat transfer tubes of the individual panels are part of a system design. When heating, the electric heating of the sump allows one

easy integration of the low-temperature radiant heaters in a variable interior installation system.

As a flexible wall panel several, articulated interconnected heat exchanger panels are guided on rails and form a folding wall. A further embodiment is a freely deployable screen, in which the individual heat exchanger panels are interconnected by hinges. Another possibility is to store a heat exchanger panel either on its base or at its upper end on rollers. As a mobile element, it can be used as needed for cooling and heating.

Several, connected to a lamellae heat exchanger panels form a suspended cooling ceiling to cool the room air from the ceiling ago. In this case, a plurality of lamellar heat exchanger panels in a cooling circuit with flow and return are interconnected.

In the context of the invention, the formation of a cup-shaped panel with single or biaxial curvature is possible. In subway tubes, railway tunnels and mine tunnels

The high room air temperatures prevailing there require effective cooling. With an at least section-wise lining of these cavities can be on the heat transfer Liquid excess and unwanted heat can be effectively dissipated from these spaces.

The figures show examples of some applications and

Embodiments of the invention.

It shows:

Fig. 1 is a heat exchanger panel as a heat sink in the

schematic isometric processing

Fig. 2 is a heat exchanger panel as a combined cooling and

Radiator in the schematic isometric processing

Fig. 3 is a heat exchanger panel as a combined cooling and

Radiator in schematic vertical section

Fig. 4 shows the intersection of four heat exchanger panels in a schematic horizontal section

Fig. 5 shows the detail of a flexible room divider

Heat exchanger panels in a schematic horizontal section

Fig. 6 is a lamellae of a plurality of

Heat exchanger panels in the isometric overview

Fig. 7 shows a railway tunnel with built-in heat exchanger panels in schematic cross-section

8 shows the pressure vessel of a heat exchanger panel in FIG

horizontal detail section

9 shows the pressure vessel of a heat exchanger panel in

horizontal detail section

10 shows the pressure vessel of a heat exchanger panel in

horizontal detail section

11 shows the pressure vessel of a heat exchanger panel in FIG

horizontal detail section

Fig. 1 shows a large-scale heat exchanger panel 3 as a heat sink 30, which can be integrated as a wall panel 32 in the wall structure of an interior. In the working space 10 of a two-phase thermosyphon 1 is a working medium 11, located in the Resting state of the heat sink 30 in the liquid phase in a sump 110 at the lower end of the working space 10 is located. at

Heat absorption via a work surface 12, which is formed by the front cover shell 20 and the rear cover shell 21 of the pressure vessel 2, the working medium 11, for example water or alcohol or a mixture of both liquids, begins to evaporate and ascend in the gas phase 111 to Condense heat transfer tube 300. In a continuous process within the two-phase thermosiphon 1, the working medium 11 flows back into the sump 100 at the lower end of the working space 10 as condensate.

By means of a heat transfer fluid 301 is discharged in this way unwanted and excess heat from a room. To the boiling temperature of the alcohol under atmospheric

Conditions at 78.4 ° C is to lower to below 25 ° C, in the working space, a negative pressure of about 5 Pascal is required. To ensure this negative pressure over time, a pressure vessel 2 is proposed in sandwich construction, the cover shells 20, 21 are held by means of a profile plate 221 at a distance and interconnected. The working space 10 has at the upper end an extension for receiving the heat carrier tube 300. Transverse ribs 302 and longitudinal ribs 303 within the heat transfer tube 300

favor a sensitive heat transfer from the heat transfer tube 300 to the heat transfer fluid 301. In the case that only one side of the heat exchanger panel 3 is in communication with the room air, the rear side with a relatively cooler

Wall construction connected. A minimal temperature gradient within the panel causes the working fluid 11 in the gas phase 111 to rise into the flow chambers 102 formed by the profiled sheet 221 and to flow back into the sump 100 after the condensation on the heat transfer tube 25 in the return chambers 103. It does that

Profiled sheet 221 a flow guide 104 to support the evaporation and condensation cycle ago. To allow the best possible heat conduction and for a lasting Maintenance of the negative pressure is proposed to produce all parts of the heat exchanger panel 3 made of thin-walled stainless steel.

FIG. 2 shows a room-high heat exchanger panel 3 as a combined cooling and heating body 30, 31. In the case of cooling, the two-phase thermosiphon 1 operates in accordance with the example described in FIG. The wall panel 32 has a front and a rear

Cover shell 20, 21, which are held by line-shaped spacers 22 in the form of ribs 220 at a distance and interconnected. By laser welding, the cover shells

20, 21 and the ribs 220, each made of stainless steel, are welded together to form a vacuum-tight pressure vessel 2. A pure alcohol, e.g. Methanol or ethanol, as

Working medium 11 evaporates under reduced pressure conditions already at a room temperature below 25 ° C and increases as the gas phase 111 to the condenser 101, there to release the

Evaporating enthalpy on the outer surface of the heat carrier tube 300 to condense and flow back into the sump 100 as a liquid automatically. The greater the temperature gradient between the room air and the heat transfer fluid 301, the more heat can be transferred from the heat transfer fluid 301

be absorbed and derived from a room. Water, which has a temperature gradient of 10 ° C and more even in the summer without any external effect on the room air, can e.g. from a cistern or other external source, such as groundwater, surface water, or even the

Tap water are removed. The gas phase 111 of the alcohol causes a uniform temperature distribution in the working space 10 of the two-phase thermosiphon 1. This is also advantageous for the heating case when the sump 100 of the working space 10 is warmed to the working medium 11 in a gas phase 111

convict in which it on the cover shells 20, 21 as

Work surface 12 Heat over a large area to one or two can leave neighboring rooms. The heating of the sump 100 takes place in this example via an electric resistance heater 311 of two heating bands. Alternatively, an electrically conductive coating in the region of the sump 100 can also be provided.

Fig. 3 shows the section of a room-high heat exchanger panel 3 with a width of e.g. I m, where a cooling case and a

Heating case are provided. The wall panel 32 consists of two

Cover shells 20, 21, which have internal ribs 220 and a

circumferential edge composite are connected to a vacuum-tight pressure vessel 2 made of stainless steel. In the cooling case, the heat exchanger panel 3 acts as a heat sink 30, wherein the liquid resting in the sump 100 working medium 11 passes into the gas phase 111 and rises to the condenser 101 at the upper end of the heat exchanger panel 3, where it condenses and heat to the heat transfer tube 300 and guided therein Heat transfer fluid 301 transfers. To the best possible wetting of the working space 10 with the working medium 11th

ensure horizontal beads 200, 210 are provided, at which collect small amounts of condensate and in a thermally conductive contact with the cover shells 20, 21 as the

Working surface 12 of the two-phase thermosiphon 1 can come. In the heating case, the heat exchanger panel 3 is a radiator 31, wherein in a heating circuit 310 with flow 37 and return 38 of the sump 100 is heated. In this example, flow and return 37, 38 are formed in an array of two concentric tubes.

Flow temperatures that are only a few degrees Celsius above a pleasant perceived room air temperature, e.g. 24 ° C, sufficient to the working medium 11, the e. can also consist of water to evaporate. The gas phase 111 of the working medium 11

allows a large-scale heat dissipation through the work surface 12. The heat exchanger panel 3 acts as a low-temperature radiant heater. In the case of water as a working medium 11 is proposed to protect the inside of the working space 10 by a galvanic coating 105, for example made of copper, from corrosion. Breakthroughs in the ribs 220 of the pressure vessel. 2

facilitate the flow of gas within the working space and promote a uniform temperature distribution in the heating and

Cooling case.

Fig. 4 shows the intersection of four partition wall panels 33, each formed as a heat exchanger panels 3 and part of a variable interior installation system. The heat exchanger panels 3 each comprise a pressure vessel 2 for a sheet-like two-phase thermosiphon 1, which has a in a

Heat transfer tube 300 guided heat transfer fluid 301 as a heat sink 30 excess and dissipates unwanted heat from four adjacent spaces. In each panel, the cover shells 20, 21 form a working surface 12 for convective heat transfer from the room air to the heat exchanger panels 3. At the intersection of the four partition wall panels 33 is a

provided hydraulic coupling of the heat transfer tubes 300. In a cooling circuit, several heat exchanger panels 3 can be connected in series or approached individually. In each case at the lower end of the heat exchanger panels 3, a Kondensatrinne 13 can be provided.

Fig. 5 shows a flexible room divider 34, which is constructed in the manner of a screen, wherein joints 241 between the heat exchanger panels 3, the formation of a self

allow stabilizing folding mechanism. At the foot of the

Heat exchanger panels 3, a Kondensatrinne 13 is provided to collect possibly occurring on the work surface 12 condensate. Between the heat transfer tubes 300 of a panel allow flexible pipe or hose connections the

Folding movement of the heat exchanger panels 3. Fig. 6 shows a slat register 35, which consists of several

Heat exchanger panels 3 is constructed, which are connected in a cooling circuit to a flow 37 and a return line 38. Each individual blade operates as a two-phase thermosiphon 1, has a pressure vessel 2 and is as an inventive

Heat exchanger panel 3 is formed.

Fig. 7 shows the schematic vertical section through a

Railway or subway tunnel. Two uniaxially curved,

cup-shaped panels 36 serve here as a heat exchanger panels 3 for dissipating unwanted and excess heat from the

Tunnel tube. At its upper end is one each

Extension for receiving a heat carrier tube 300, can be passed through the water as a heat transfer fluid 301 to dissipate heat without much hydraulic resistance from the tunnel tube. The distance between the sump 100 and the condenser 101 of a corresponding two-phase thermosyphon 1 can be several meters, with the working medium 11 rising to the condenser 101 through the heat received convectively via the working surface 12 in the gas phase 111. The work surface 12 is formed in each case by the cover shells 20, 21, which are welded together with curved ribs 220 as linear spacers 22 to a pressure vessel. In a tunnel tube, a plurality of such heat exchanger panels 3 in series

be switched to cool the air in the tunnel tube.

Fig. 8 shows a schematic horizontal section through the

Pressure vessel 2 of a heat exchanger panel 3. Linear

Spacer 20 in the form of a profile sheet 221 connect the cover shells 20, 21 to a bending, thrust and pressure-resistant

Pressure vessel 2. A U-shaped edge profile 24 is for the

Edge bond between the cover shells 20, 21 provided .. All parts can be made of stainless steel and connected vacuum-tight to each other in a laser welding process.

9 also shows a detail section through a heat exchanger panel 3, in which the spacer 22 is formed by a corrugated sheet 221 and a U-shaped edge profile 24 is provided for the edge composite. As shown in FIG. 1, the embodiment variants of a heat exchanger panel 3 shown in FIGS. 8 and 9 may be designed to form a supply and a return chamber for the working medium, in particular if the heat input is unidirectional in a heat sink and the the warm side facing chambers as flow chambers 102 and the cool side facing chambers as return chambers 103 are used. In this case, the profile sheet 221 forms a flow guide

104th

10 shows a heat exchanger panel 3, in which the cover shells 20, 21 are connected by linear spacers 22 in the form of Z-shaped ribs 220. The C-shaped edge profile 24 allows with an undercut 240 the installation in a

Elemented panel system for partitions.

Fig. 11 shows the horizontal detail section of a heat exchanger panel 3, in which the two cover shells 20, 21 are each connected as deep-drawn sheets of stainless steel via molded knobs 230 as punctiform spacers 23 directly in a welding or soldering. Reference numeral Overview

Two-phase heat exchanger

1 pressure vessel 2 3 thermosyphon panel

Working space .10 Front cover shell 20 Heat sink 30

Swamp 100 bead 200 heat transfer pipe 300

Rearward Wärmeträger¬

Capacitor 101 21 301

Cover shell liquid

Supply chamber 102 bead 210 transverse rib 302

linear

Return chamber 103 22 longitudinal rib 303

spacer

Strömungsleit surface 104 ribs 220 radiator 31st

galvanic

105 profiled sheet 221 heating circuit 310 coating

Point-shaped electric resistors

Working medium 11 23 311

Spacer is hot

Liquid 110 Knobs 230 Wall panel 32

Gas phase 111 Edge profile 24 Partition wall panel 33

flexible

Working surface 12 Undercut 240 34

room divider

Condensate channel 13 Joint 241 Lamella register 35

cupped

36 panel

Lead 37

Return 38

Claims

claims

1. Heat exchanger panel (3) for conditioning the room air of a room, which heat exchanger panel (3) encapsulated with respect to the atmosphere and with a negative pressure or

Overpressure acted upon pressure vessel (2) with an inner working space (10) for receiving a working medium

(11), wherein the pressure vessel (2) has an outer

Having working surface (12) which is in contact with the room air at least on one side,

wherein the working space (10) has an upper and a lower region and a sump (100) is provided in the lower region and in the upper region a condenser (101) with at least one heat transfer tube (300) is provided, the latter being designed to a heat transfer fluid (301) to be flowed through,

and the working medium (11) in the cooling case of the work surface

(12) absorbs heat, condenses as gas phase (111) on the condenser (101) and thereby transfers the heat to the heat transfer fluid (301) so as to dissipate the heat from the room air with the heat transfer fluid (301).

2. Heat exchanger panel (3) according to claim 1, characterized

marked,

that in the case of cooling the transfer of heat from the space to at least one side of the working surface (12) of the

Heat exchanger panel (3) takes place at least 50% via convection.

3. heat exchanger panel (3) according to claim 1 or 2, characterized

marked,

the work surface (12) of the heat exchanger panel (3) has a height and a width of at least 0.5 m.

4. heat exchanger panel (3) according to one of the preceding

Claims, characterized the heat exchanger panel (3) is designed to be used as a heat sink (30) in the case of cooling and as a heat sink in a heating case

Radiator (31) act.

Heat exchanger panel (3) according to claim 4, characterized

marked,

that in the heating case, heat is supplied to the working space (10) in the lower region by preheating the sump (100) so that the working medium (11) transfers heat to the working surface (12) in the gas phase (111).

Heat exchanger panel (3) according to claim 4, characterized

marked,

that in the heating case, the heating of the sump (100) via an electric resistance heater (311) in the form of an electrically conductive coating or in the form of at least one heating wire or via a heating tube (310) with flow and return (37, 38).

Heat exchanger panel (3) according to one of the preceding

Claims, characterized

the pressure vessel (2) is constructed as a sandwich element, wherein a front cover shell (20) and a rear one

Cover shell (21) held by means of linear spacers (22) or by means of punctiform spacers (23) at a distance and are connected at their edges in a welding or soldering vacuum-tight with each other.

Heat exchanger panel (3) according to one of the preceding

Claims, characterized

that the front cover shell (20) and the rear cover shell (21) are each formed as deep-drawn mold sheets and each other via molded nubs (230) or beads and a peripheral composite vacuum-tight with each other

get connected.

9. heat exchanger panel (3) according to one of the preceding

Claims, characterized

a heat exchanger panel (3) is mounted as a wall panel (32) at a distance to an existing interior or exterior wall of a room.

10. heat exchanger panel (3) according to one of the preceding

Claims, characterized

a heat exchanger panel (3) as partition wall panel (33) is part of a variable partition wall system, wherein releasable pipe couplings are provided for flow and return (37, 38) of the heat transfer fluid (301) and possibly also for the heating circuit (310).

11. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

in that at least two heat exchanger panels (3) form a flexible room divider (26) in the manner of a screen, a joint (241) between each two heat exchanger panels (3) and flexible for flow and return (37, 38) of the heat transfer fluid (301) Pipe couplings are provided.

12. heat exchanger panel (3) according to claim 1, characterized

marked,

in that a flexible room divider (34) is provided, which is mounted on rollers at its upper or lower end and has e.g. is designed as a sliding wall, wherein the heat transfer tube outside the heat exchanger panel (3) is formed by a flexible, roll-up hose.

13. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

in that a heat exchanger panel (3) is designed as a lamella, with a plurality of lamellas forming a lamellar register (35).

can be joined together to a suspended Cooling ceiling or a cooling wall to form.

14. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

that a heat exchanger panel (3) is installed as a shell-shaped panel (36) in a tunnel and thereby as a heat sink, for example. for a railway or subway tunnel.

15. heat exchanger panel (3) according to one of the preceding

Claims, characterized

the pressure vessel (2) is constructed of stainless steel sheets and profiles and the working medium (11) is made of an alcohol, e.g. Methanol or ethanol, is a homogeneous

Temperature distribution within the working space (10) to achieve.

16. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

that in the case of water as a working medium (11) the

Working space (10) of a pressure vessel (2) made of stainless steel by a galvanic coating (105) e.g. made of copper

Corrosion is protected.

17. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

that the phase change of the working medium (11) on the condenser (101) by transverse ribs (302) and longitudinal ribs (303) on

Heat transfer tube (300) is supported, wherein longitudinal ribs (303) within the heat transfer tube (300) has a sensitive

Heat transfer from the heat transfer tube (300) on the

Favor heat transfer fluid (301).

18. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

that the working space (10) at least one, a heat-absorbing work surface (12) facing the flow chamber (102), in which the working medium (11) in the gas phase (111) rises, and a rear return chamber (103), in which the working medium (11) is returned as liquid in the sump (100), wherein a spacer (22) in the form of a profile sheet (221) forms the chambers (102, 103) and acts as a flow guide surface (104).

19. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

that the working space (10) has one with the sump (100)

connected wick with a capillary structure which receives the working medium (11) in the lower region of the heat exchanger panel (3) in a heat-conducting contact with the

Working surface (12) brings.

20. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

in that spacers (23) are provided which are punctiformly connected to the cover shells (20, 21) and are e.g. are formed as pins or bolts or have a grid structure in the manner of a space frame.

21. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

in that the cover shells (20, 21) of a pressure vessel (2) are folded, bent or crimped at their edges and directly or via an edge profile (24).

are interconnected.

22. Heat exchanger panel (3) according to one of the preceding

Claims, characterized

in that the cover shells (20, 21) have horizontal beads (200, 210) which expand the outer working surface (12) and thereby protrude into the working space (10) in order to wetting the working space (10) with the working medium (11) support.

23. Heat exchanger panel (3) according to claim 1, characterized

marked,

in that the heat transfer fluid (301) in a cooling circuit consists of water and is supplied to a reservoir, e.g. in the form of a Erdzisterne, is connected.

24. Heat exchanger panel (3) according to claim 1, characterized

marked,

that the flow (37) and the return (38) of the cooling circuit and the heating circuit (310) each within a heat exchanger panel (3) are guided and, for. when

Coaxial tube are formed.