WO2018091128A1

WO2018091128A1 - Heat supplying device

Info

Publication number: WO2018091128A1
Application number: PCT/EP2017/001280
Authority: WO
Inventors: Gerald Fast; Mathias van Beek
Original assignee: Mtu Friedrichshafen Gmbh
Priority date: 2016-11-17
Filing date: 2017-11-03
Publication date: 2018-05-24
Also published as: DE102016222687A1; DE102016222687B4

Abstract

The invention relates to a heat supplying device (1) comprising: a system for performing a cyclic thermodynamic process that includes a working medium circuit (5); at least one cooling circuit section (7) for a coolant circuit (9); and at least one heating circuit section (11) for an effective heat circuit (13); the cooling circuit section (7) and the heating circuit section (11) are fluidically separated from each other. According to the invention, the cooling circuit section (7) is thermally connected to both the working medium circuit (5) and the heating circuit section (11).

Description

Heat recovery equipment

The invention relates to a heat supply device.

Such a heat supply device has a system for carrying out a thermodynamic cycle having a working medium circuit. The

Heat supply device also has at least one cooling circuit section, which is adapted for integration into a coolant circuit, and also at least one heating circuit section, which is adapted for integration into a Nutzwärme cycle, wherein the cooling circuit section and the heating circuit section are fluidly separated from each other. These are therefore in particular separate fluid circuits which - depending on the application - can also be operated with different heat transport media, wherein due to the fluidic separation of the circuit sections no mixing of the various heat transfer media is to be feared. Such

Heat supply device can be used in particular in a combined heat and power plant application, and more generally where a mechanical and / or electrical power and heat should be provided for a customer. In this case, in particular heat-driven block heating systems for the application of the heat supply device in question. Heat supply devices of the type mentioned here are in particular with regard to the efficient integration of a coolant circuit in the overall system

improvement.

The invention has for its object to provide a heat supply device in which the disadvantages mentioned do not occur.

The object is achieved by providing a heat supply device having the features of claim 1. Advantageous embodiments will be apparent from the

Dependent claims. A heat supply device of the type mentioned is in particular further developed in such a way that the cooling circuit section is thermally connected both to the working medium circuit and to the heating circuit section. In this way, it is possible to incorporate a refrigerant circuit via the refrigeration cycle section into the operation of the heat supply device in two ways, in that the refrigeration cycle section can exchange heat in particular both with the working medium circuit and with the heating circuit section. This is a particularly efficient embodiment of

Heat supply device especially in view of the integration of the coolant circuit possible.

According to one embodiment of the invention it is provided that the cooling circuit section with the working fluid circuit via a first heat exchanger and with the

Heating circuit section is thermally connected via a second heat exchanger. In this case, in the first heat exchanger, on the one hand, working medium of the working medium circuit and, on the other hand, coolant of the cooling circuit section, wherein the working medium and the

Coolant fluidly separated from each other, but in thermal contact with each other, so that heat exchange is possible. Accordingly, flows in the second heat exchanger, a heating medium, which passes through the heating circuit section, on the one hand, and the coolant of the cooling circuit section on the other hand, wherein the heating medium and the coolant in the second heat exchanger fluidly separated from each other, but thermally in contact with each other, so that a heat exchange between the heating medium and the coolant is possible. In this way, the coolant can both with the

Working medium of the working medium circuit as well as with the heating medium of

Heat circuit section exchange heat.

It is preferably provided that the first heat exchanger in the cooling circuit section - viewed in the flow direction of the coolant - is arranged upstream of the second heat exchanger. The coolant thus preferably comes into thermal contact first with the working medium and then with the heating medium.

According to one embodiment of the invention, it is provided that the first heat exchanger in the working medium circuit - viewed in the flow direction of the working medium - arranged upstream of an evaporator and is designed as a preheater for the working medium. The working fluid circuit has so far preferred - especially in the flow direction of the working medium seen in the order given - a working media conveyor, which may be designed in particular as a feed pump, the evaporator, an expansion device, and a capacitor. In per se known manner, however, the working fluid is conveyed through the working media conveyor to the evaporator, where it absorbs heat and is preferably evaporated. The heated and preferably vaporized working fluid continues to flow to the expansion device where it is expanded while performing mechanical work on the expansion device. The relaxed working fluid continues to flow to the condenser where it is cooled and preferably re-liquefied, with the cooled and preferably liquefied working fluid flowing back to the working fluid conveyor so that the working fluid circuit is closed. The working media cycle is preferably set up for an organic Rankine

Circular process (Organic Rankine Cycle - ORC). As the working medium, for example, ethanol, an ethanol-water mixture, or other organic working medium, for example, a fluorohydrocarbon or a chlorofluorohydrocarbon may be used. As a coolant and / or as a heating medium preferably water - optionally with additives - are used.

The first heat exchanger, which is designed as a preheater for the working medium, is now preferably arranged in particular fluidically between the working media conveyor on the one hand and the evaporator on the other hand, so that the working fluid flows from the working media conveyor initially through the first heat exchanger, where it is preheated , where it then flows through the evaporator. In the first

Heat exchanger, the coolant can deliver heat to the working fluid, so that the coolant is cooled, the heat in the working fluid circuit is useful for performing the thermodynamic cycle.

Alternatively or additionally, it is preferably provided that the heating circuit section

fluidically with the condenser of the working fluid circuit for cooling the

Working medium is connected in the condenser by means of the heating circuit through the operating medium flowing through the heating medium. In the heating circuit section is so in particular registered condensation heat of the working medium, which is obtained in the condenser, which is cooled by the heating medium of the heating circuit section. In this case, this heat of condensation can be used in the Nutzwärme cycle as useful heat.

Preferably, the working medium in the condenser is cooled exclusively by the heating medium.

It is preferably provided that the second heat exchanger in the heating circuit section - viewed in the flow direction of the heating medium - arranged upstream of the condenser and is designed to preheat the heating medium prior to its entry into the condenser. In this way, the coolant flowing in the cooling circuit section can release heat to the heating medium flowing in the heating circuit section and preheat the same before it enters the condenser. The coolant is cooled while the waste heat is supplied as useful heat to the heating circuit section and thus the useful heat cycle. In this embodiment, the first heat exchanger is preferably along the

Direction of flow of the coolant in the cooling circuit section seen - arranged upstream of the second heat exchanger. It is convenient, heat from the coolant at a first, higher temperature level via the first heat exchanger in the

Enter working fluid circuit and then use more heat from the coolant at a second, lower temperature level to preheat the heating medium upstream of the condenser. In this way, heat from the coolant can be used extremely efficiently on the one hand for the thermodynamic cycle and thereby indirectly to provide mechanical and / or electrical power, while at the same time heat from the coolant as useful heat the heating circuit section and thus the Nutzwärme cycle can be supplied. It turns out that at least in a variety of

Operating conditions cooling of the coolant in the first heat exchanger on the one hand and in the second heat exchanger on the other hand is sufficient so that it requires no further cooling of the coolant. The from the coolant circuit to ensure its

Functional heat dissipated so completely on the one hand in the

Working medium circuit and on the other hand be used in the Nutzwärme cycle. For

Operating conditions in which a larger amount of heat must be removed from the cooling circuit, as this is possible in the first heat exchanger and in the second heat exchanger, an emergency cooling device may be provided. According to a development of the invention, it is provided that the first heat exchanger is designed as a condenser in the working medium circuit. In this case, the coolant in the condenser serves to cool the working medium and thus absorbs heat in the condenser. This seems counterintuitive at first, but on closer inspection proves to be both thermodynamic and in terms of the conception of

Heat supply device overall particularly favorable. In this case, the condenser is preferably cooled exclusively by the coolant flowing in the cooling circuit section. Alternatively or additionally, particularly preferably in addition, the second heat exchanger is as

Heating heat exchanger formed in the heating circuit section. Most preferably, the second heat exchanger is the only heating heat exchanger in the heating circuit section. The coolant thus emits heat originating from the cooling circuit and preferably also the heat removed from the condenser in the second heat exchanger to the heating medium of the heating circuit section. This makes it possible, the heating circuit section a large

Supplying heat at a high temperature level, while at the same time the coolant can be withdrawn a sufficiently large amount of heat, so that a safe operation of the coolant circuit is ensured. At the same time, the number of in the

Heat supply device built-in heat exchanger can be reduced in an advantageous manner, because - except the evaporator - only the capacitor and the second

Heat exchanger requires because the condenser is also the first heat exchanger.

Optionally, however, an emergency cooling device may be provided to the

Coolant in any operating condition to be able to extract a sufficient amount of heat to ensure safe operation of the cooling circuit.

As has already become clear, in this case too, preferably the coolant in the cooling circuit section flows through the first heat exchanger and then the second heat exchanger, wherein it initially absorbs heat from the working medium in the first heat exchanger designed as a condenser of the working medium circuit and

then heat in the second heat exchanger to the heating medium of

Heats the heating circuit section.

According to one embodiment of the invention it is provided that the working fluid circuit is thermally connected to an internal combustion engine such that waste heat of the Internal combustion engine in the working fluid circuit for the thermodynamic see cycle process is available. In this case, the waste heat of the internal combustion engine, in particular from exhaust gas thereof and / or originate from a coolant circuit of the internal combustion engine. In particular, the evaporator of the working fluid circuit can be flowed through by exhaust gas of the internal combustion engine and / or by coolant from the coolant circuit of the internal combustion engine. Such an embodiment is particularly advantageous because a customer both by means of

Internal combustion engine provided mechanical and / or electrical power as well

Useful heat can be supplied via the Nutzwärme cycle. The

Heat supply device is preferably designed as a combined heat and power plant, or it is part of a combined heat and power plant.

It is preferably provided that the cooling circuit section is part of a coolant circuit of the internal combustion engine. In particular, the coolant used for cooling the internal combustion engine and heated in the internal combustion engine is preferably used along the

Cooling circuit section guided so that it the first heat exchanger and the second

Passes through the heat exchanger, where it - in particular by the first

Heat exchanger and the second heat exchanger sufficiently cooled - is returned to the internal combustion engine, where it is in turn used for their cooling. It requires preferably at least in most operating points of

Heat supply device no further cooling of the coolant

Internal combustion engine. But it is possible that an emergency cooling device is provided in order to be able to dissipate a sufficient amount of heat from the coolant circuit in each case. The cooling circuit section is in this case in the coolant circuit of

Internal combustion engine incorporated and forms part of the same.

Alternatively or additionally, the internal combustion engine is preferably drive-connected with a first electric machine for generating electrical power. In this way, by means of the internal combustion engine, electric power can be generated by driving the electric machine, which is preferably designed as a generator, and fed to a pickup, which preferably at the same time reduces the useful heat from the heating circuit section.

According to one embodiment of the invention, it is provided that the expansion device of the working fluid circuit is mechanically operatively connected to an internal combustion engine. This may in particular be exactly that internal combustion engine whose waste heat in the working medium circuit is used to carry out the thermodynamic cycle. The expansion device can in particular with a crankshaft of the

Internal combustion engine - preferably via a gear drive - be operatively connected to support the internal combustion engine and to supply her in particular additional torque.

Alternatively or additionally, it is preferably provided that the expansion device is drive-connected with a second electric machine for generating electrical power. In this way, the waste heat of the internal combustion engine can be additionally used to provide electrical power to a customer.

According to one embodiment of the invention it is provided that the heating circuit section has a flow connection and a return connection, which are adapted to a

To connect Nutzwärme cycle in particular a customer. In this way, the user can be supplied useful heat from the heating circuit section for the useful heat cycle. It is particularly preferred that no further fluid connections are otherwise provided on the side of the pickup, so that this only has to connect the useful heat circuit on the one hand to the flow connection and on the other hand to the return connection. From the point of view of the customer, this represents an extremely simple infrastructure which can be put into operation quickly and without cumbersome additional measures merely by connecting the useful heat circuit to the flow connection and the return connection.

According to one embodiment of the invention is preferably provided that the

Cooling circuit portion having an emergency cooling device which is adapted to cool the coolant in the cooling circuit section in an emergency cooling operating condition. An emergency cooling operating state, however, is in particular an operating state in which in the first

Heat exchanger and / or in the second heat exchanger not enough heat is removed from the coolant to a safe function of the coolant circuit to

guarantee. The integration of the emergency cooling device in the cooling circuit section is advantageous insofar as this means that only two connections are made available to the consumer, namely the flow connection and the return connection for connecting the useful heat cycle, wherein the cooling via the coolant Circulation and in particular the recooling of the coolant circuit including the emergency cooling completely integrated into the heat supply device and thus by the provider of

Heat supply device can be supplied from one source.

Alternatively, it is also possible for the emergency cooling device to be integrated in the useful heat circuit - but then on the side of the consumer - or in the heating circuit section. An emergency cooling of the coolant can then be achieved by cooling the heating medium upstream of the second heat exchanger by the emergency cooling device so that a sufficient amount of heat can be removed from the cooling circuit section in the subsequent second heat exchanger.

The emergency cooling device is preferably in particular as liquid flowed through

Heat exchanger formed.

Finally, it is provided according to a development of the invention that the

Arbeitsmedienkreislauf a controllable bypass path for at least partial

Bypassing of the expansion device has. That the bypass path is controllable means in particular that a flow cross-section of the bypass path is variable, in particular controllable or controllable. About the controllable bypass path and

In particular, its control can be changed in a preferred manner performed by the working fluid at the expansion device, mechanical work, in particular also be reduced to zero by the entire working fluid is guided around the expansion device. Thus, it is possible to use the heat supply device optionally exclusively for the provision of useful heat, and to dispense with a provision of mechanical and / or electrical power via the expansion device. The controllability of the mechanical work performed on the expansion device by the working medium represents an additional degree of freedom for operating the heat supply device. In particular, the proportionate distribution of the provided power in the form of force on the one hand and heat on the other can be varied, preferably regulated.

The invention will be explained in more detail below with reference to the drawing. Showing:

Figure 1 is a schematic representation of a first exemplary embodiment of a

Heat supply device, and Figure 2 is a schematic representation of a second embodiment of a

Heat supply equipment. Fig. 1 shows a schematic representation of a first embodiment of a

Heat supply device 1, which is a system 3 for performing a

Thermodynamic cycle process, in particular for carrying out an organic Rankine cycle (Organic Rankine Cycle - ORC) has. The system 3 has a

Working medium circuit 5, in which a particular organic working fluid flows, at which the thermodynamic cycle is performed. This may be, for example, ethanol, an ethanol-water mixture, or another organic

Working medium, in particular a fluorohydrocarbon or a

Act chlorofluorocarbon. The heat supply device 1 also has a cooling circuit section 7 of a coolant circuit 9 and a heating circuit section 11 of a useful heat circuit 13, wherein the cooling circuit section 7 and the heating circuit section 11 are fluidly separated from each other. It is provided that the cooling circuit section 7 is thermally connected both with the working fluid circuit 5 and with the heating circuit section 11. In this way, the cooling circuit section 7 and in particular also the coolant circuit 9 can be integrated into the heat supply device 1 in a particularly efficient manner.

The working medium circuit 5 has - in particular along the flow direction of the

Working medium in the working medium circuit 5 seen in this order - a

Working media conveyor 15, an evaporator 17, an expansion device 19 and a capacitor 21. The working medium preferably flows in liquid form from the working medium conveyor 15 to the evaporator 17, where it absorbs heat and is preferably evaporated. The vaporous working medium then flows on to the expansion device 19, in which it is expanded, thereby performing mechanical work on the expansion device 19. The expansion device can, for example, as

Turbomachine, in particular as a turbine, as a displacement machine, in particular as a reciprocating piston engine, as a scroll expander, as Roots expander, as a screw expander, or be designed in another suitable manner. From the expansion device 19, the expanded working fluid continues to flow to the

Capacitor 21, in which it gives off heat, cooled and in particular is condensed again into the liquid phase. From the condenser 21 then passes the liquid working medium back to the working media conveyor 15, so that the working medium circuit 5 is closed.

Preferably, the working fluid circuit 5 is thermally connected to an internal combustion engine 25 such that waste heat of the internal combustion engine 25 in the working fluid circuit 5 is used for the thermodynamic cycle. In particular, it is preferably provided that the evaporator 17 is flowed through by exhaust gas of the internal combustion engine 25, so that waste heat from the exhaust gas of the internal combustion engine 25 can be used in the evaporator 17 for heating and in particular evaporation of the working medium. The internal combustion engine 25 is in turn preferably drive-connected to a first electric machine 26, so that the first electric machine 26 can be driven by the internal combustion engine 25, so that electric power can be generated by means of the internal combustion engine 25 via the first electric machine 26 ,

The expansion device 19 is preferably drive-connected with a second electric machine 23, so that the second electric machine 23 through the

Expansion device 19 is driven. In this case, the second electric machine 23 is preferably designed as a generator and set up for generating electrical power. Alternatively or additionally, the expansion device 19 with an internal combustion engine - in particular with the internal combustion engine 25 - be mechanically operatively connected so that they support in particular the internal combustion engine and an additional torque - preferably in a crankshaft of the internal combustion engine - can initiate.

The heat supply device 1 is preferably part of a combined heat and power plant or is itself a combined heat and power plant, which for a customer electrical power - preferably both from the internal combustion engine 25 associated first electric machine 26 and from the expander 19 associated second electric machine 23 - and heat provides over the heating circuit section 11 for the Nutzwärme cycle 13. This may in particular be a heat-led combined heat and power plant. The cooling circuit section 7 is preferably thermally connected to the working medium circuit 5 via a first heat exchanger 27 and to the heating circuit section 11 via a second heat exchanger 29. In this case, the first heat exchanger 27 is preferably along the

Direction of flow of a cooling circuit section 7 flowing through the coolant seen - arranged upstream of the second heat exchanger 29.

In the embodiment of the heat supply device 1 shown in Figure 1, the first heat exchanger 27 in the working medium circuit 5 - seen in the flow direction of the working medium - upstream of the evaporator 17 and in particular downstream of the working media conveyor 15 is arranged as a preheater for the working medium. At the same time, the heating circuit section 11 is fluidically connected to the condenser 21 of the working medium circuit 5 for cooling the working medium in the condenser 21 by means of a heating medium flowing through the heating circuit section 11. The second heat exchanger 29 is arranged in the heating circuit section 11 - viewed along the flow direction of the heating medium - upstream of the condenser 21 and arranged for preheating the heating medium prior to its entry into the condenser 21st

The cooling circuit section 7 is preferably part of the coolant circuit 9, which is the coolant circuit of the internal combustion engine 25, via which the internal combustion engine 25 is cooled.

In the exemplary embodiment of the heat supply device 1 according to FIG. 1, a particularly high amount of heat can be supplied to the working medium circuit 5, because not only is waste heat from the exhaust gas of the internal combustion engine 25 introduced into the evaporator 17, but also heat from the coolant circuit 9 of the internal combustion engine 25 is fed via the first heat exchanger 27 upstream of the evaporator 17 in the working medium circuit 5 for preheating the working medium. At the same time the

Condensation heat used in the condenser 21 efficiently to heat the heating medium in the heating circuit section 1 1 for the Nutzwärme cycle 13, wherein the

Heating circuit section 1 1 and thus the Nutzwärme cycle 13 even more waste heat from the refrigerant circuit 9 via the second heat exchanger 29 is supplied. Thus, the system 3 not only has a very high electrical power yield due to the large, registered in the working medium circuit 5 amount of heat, but it also results in a particularly efficient use of heat for the Nutzwärme cycle 13th The coolant is first a part of his recorded in the internal combustion engine 25 heat in the first heat exchanger 27 to the working fluid circuit 5 and then another part of its heat in the second heat exchanger 29 to the heating circuit section 1 1 and thus to the Nutzwärme cycle 13 from.

Preferably, the heat supply device 1 is designed so that the

Heat release in the first heat exchanger 27 and in the second heat exchanger 29 is sufficient to cool the coolant for a sufficient cooling function of the internal combustion engine 25. This is preferably true for at least most operating conditions of the

Heat supply device 1. In the event that the coolant in the heat exchangers 27, 29 can not be withdrawn enough heat, preferably an emergency cooling device 31 - preferably in the form of another heat exchanger - is provided, which here in the

Nutzwärme cycle 13 is arranged. Thus, it is possible to indirectly withdraw additional heat from the coolant flowing in the coolant circuit 9, mediated via the second heat exchanger 29 by cooling the useful heat circuit 13 with the emergency cooling device 31.

Alternatively, it is also possible in the exemplary embodiment illustrated in FIG. 1 that the emergency cooling device 31 is arranged in the coolant circuit 9 instead of in the useful heat circuit 13. In this case, a direct cooling of the coolant by means of

Emergency cooling device 31 possible. The arrangement of the emergency cooling device 31 in the Nutzwärme- circuit 13 or especially in the heating circuit section 11 has the additional advantage that the heating medium upstream of the condenser 21 can be cooled if the heating medium upstream of the condenser 21 is too warm, which ultimately negative the performance in the system 3 would affect. The Notkühl device 31 can then be used to cool the heating medium and to ensure that the working fluid circuit 5 can be supplied to waste heat of the internal combustion engine 25 can be converted to the greatest extent in electrical and / or mechanical power. FIG. 1 also shows a heating medium conveying device 33, which is preferably designed as a pump and in particular for conveying the heating medium along the

Nutzwärme cycle 13 is used. Accordingly, a coolant delivery device 35, which is preferably designed as a pump, is preferably also arranged in the coolant circuit 9 is, and in particular the promotion of the coolant along the coolant circuit 9 is used.

FIG. 1 schematically shows a first system boundary 37, which preferably the

Heat supply device 1 of the same by a customer, in particular a purchaser of electrical and / or mechanical power and the heat of

Heat supply device 1, facilities provided disconnects. In this case, the heating circuit section 11 preferably has a flow connection 39 and a return connection 41 for connecting the useful heat circuit 13 on the side of the consumer. Furthermore, an electrical connection 43 for removing the electrical power generated by the second electric machine 23 and / or the first electric machine 26 is illustrated schematically here. In order to be able to remove heat and / or electrical power, the consumer only needs to connect the useful heat circuit 13 to the flow connection 39 and the return connection 41, and optionally to establish an electrical connection to the electrical connection 43.

In the embodiment shown in Figure 1, the emergency cooling device 31 is part of the facilities provided by the customer. It is possible that the internal combustion engine 25 is part of the heat supply device 1 and in particular supplied by the provider of the heat supply device 1. But it is also possible that the heat supply device 1 has a second system boundary 45, wherein the internal combustion engine 25 is not part of the heat supply device 1. This can then be from another supplier or from the buyer of the

Heat supply device 1 is provided and via suitable connections with the

Evaporator 17 are connected, wherein at the same time the cooling circuit section 7 can be integrated by means of suitable connections in the coolant circuit 9.

The working medium circuit 5 preferably has a controllable bypass path 47, which is set up to at least partially bypass the expansion device 19. In this case, a controllable valve device 49 is preferably arranged in the bypass path 47, via which a flow cross section through the bypass path 47 can be changed continuously or discretely , wherein the bypass path 47 is preferably also completely lockable. By means of the bypass path 47 is preferred by the working medium on the Expander 19 made mechanical work adjustable. In this case, it is preferably also possible to guide the entire working medium along the bypass path 47 so that only heat is still provided in the condenser 21 by the working medium circuit 5, but no mechanical and / or electrical power is generated any more. For this purpose, a leading to the expansion device 19 section of the

Arbeitsmedienkreislaufs 5 by means of a check valve device 51 lockable. It is possible that also the check valve device 51 continuously or discretely for varying a

Passage cross section can be controlled or regulated, in particular by

jointly driving the check valve means 51 on the one hand and the valve means 49 on the other hand, a proportion of along the bypass path 47 flowing working fluid on the one hand and a proportion of over the expander 19 flowing working fluid on the other hand can be set variably.

Fig. 2 shows a schematic representation of a second embodiment of the

Heat supply device 1. The same and functionally identical elements are provided with the same reference numerals, so that reference is made to the preceding description. In contrast to the first embodiment according to Figure 1 is in the second

Embodiment according to Figure 2, the first heat exchanger 27 is formed as the capacitor 21; the condenser 21 thus also serves as the first heat exchanger 27 and is penetrated by the coolant flowing through the cooling circuit section 7. The second heat exchanger 29 is as - in particular single - heating heat exchanger in the

Heating circuit section 11 is formed. In this case, the incoming from the internal combustion engine 25, hot coolant is first in the condenser 21 additional heat from the working fluid circuit 5, namely the heat of condensation of the working fluid supplied, which in such addition to the heating by the heat dissipated by the engine 25 waste heat further heated coolant flows to the second heat exchanger 29 and there gives off heat to the heating circuit section 11 and the Nutzwärme circuit 13. In this case, the heat supply device 1 is preferably designed so that the heat release in the second heat exchanger 29 is sufficient to sufficiently cool the coolant for efficient cooling of the internal combustion engine 25.

The second exemplary embodiment according to FIG. 2 has a particularly simple structure and, in particular in comparison with the first exemplary embodiment according to FIG. 1, saves one

Heat exchanger, so that it is also very inexpensive. Furthermore, it can be compact build, not only because of the saving of a heat exchanger, but also because of the design-related reduced performance of the system 3, which on the higher

Temperature level of the hot coolant at the coolant inlet of the condenser 21 and thus the hotter temperature level of the working medium at the working media output of the capacitor 21 is due.

Furthermore, in the second exemplary embodiment according to FIG. 2, in contrast to the first exemplary embodiment according to FIG. 1, the emergency cooling device 31 is arranged in the cooling circuit section 7. In this case, the emergency cooling device 31 can be operated more easily in the coolant circuit 9 due to the increased graveness, that is to say the temperature difference between a primary inlet temperature and a secondary outlet temperature.

For the customer, there is the additional advantage that he does not have to provide the emergency cooling device 31. Rather, this can be provided by the provider of the heat supply device 1 - and thus virtually from one source. In particular, even if the internal combustion engine 25 is provided by the provider of the heat supply device 1 - in particular as part of the heat supply device 1 - results for the customer of the heat supply device 1, the very comfortable situation, to start the heat supply device 1 only the Nutzwärme- circuit 13 with To connect the flow connection 39 and the return port 41, where appropriate, the electrical connection with the electrical connection 43 is closed.

Overall, it turns out that with the heat supply device 1 proposed here, an extremely efficient integration of a cooling circuit section and in particular of a coolant circuit 9 - preferably an internal combustion engine - into the heat supply device 1 can be provided.

Claims

Heat supply device (1), with

- a system

(3) for performing a thermodynamic cycle comprising a working fluid circuit (5);

- At least one cooling circuit section (7) for a coolant circuit (9);

- At least one heating circuit section (1 1) for a useful heat circuit (13), wherein

- The cooling circuit section (7) and the heating circuit section (1 1) are fluidly separated from each other,

characterized in that the cooling circuit section (7) both with the

Working medium circuit (5) and with the heating circuit section (11) is thermally connected.

Heat supply device (1) according to claim 1, characterized in that the cooling circuit section (7) with the working medium circuit (5) via a first

Heat exchanger (27) and with the heating circuit section (11) via a second

Heat exchanger (29) is thermally connected.

Heat supply device (1) according to one of the preceding claims, characterized in that a) the first heat exchanger (27) in the working medium circuit (5) - in

Seen flow direction of the working medium - upstream of an evaporator (17) is arranged as a preheater for the working fluid, and / or that b) the heating circuit section (1 1) fluidly with a condenser (21) of the working fluid circuit (5) for cooling the working fluid in the condenser (21) is connected by means of a heating circuit section (11) flowing through the heating medium, and / or that c) the second heat exchanger (29) in the heating circuit section (11) - in

Direction of flow of the heating medium seen - upstream of the condenser (21) is arranged to preheat the heating medium prior to its entry into the condenser (21).

4. heat supply device (1) according to any one of the preceding claims, characterized in that a) the first heat exchanger (27) as a condenser (21) in the working medium circuit (5) is formed, and / or that b) the second heat exchanger (29) as a heating heat exchanger in the

Heating circuit section (11) is formed.

5. heat supply device (1) according to any one of the preceding claims, characterized in that the working medium circuit (5) with an internal combustion engine (25) is thermally connected such that waste heat of the internal combustion engine (25) in the

Arbeitsmedienkreislauf (5) for the thermodynamic see circle process is used, wherein preferably a) the cooling circuit section (7) part of a coolant circuit (9) of the

Internal combustion engine (25), and / or wherein b) the internal combustion engine (25) with a first electric machine (26) for

Generation of electrical power is drive-connected.

6. heat supply device (1) according to any one of the preceding claims, characterized in that the working medium circuit (5) has an expansion device (19) which a) mechanically operatively connected to an internal combustion engine (25) and / or b) with a second electrical machine ( 23) is drivingly connected to generate electrical power. Heat supply device (1) according to any one of the preceding claims, characterized in that the heating circuit section (1 1) has a flow connection (39) and a return port (41) for connecting a Nutzwärme cycle (13).

Heat supply device (1) according to any one of the preceding claims, characterized in that the cooling circuit section (7) has an emergency cooling device (31) which is adapted to cool the coolant in the cooling circuit section (7) in an emergency cooling operating condition.

Heat supply device (1) according to one of the preceding claims, characterized in that the working medium circuit (5) has a controllable bypass path (47) for at least partially bypassing the expansion device (19).