Hybrid heat pump

Abstract

The invention relates to a hybrid heat pump (1). The hybrid heat pump (1) comprises a first cycle (10) defined as an air source heat pump cycle in which a first organic fluid is passed through a first heat exchanger (12), a second cycle (20) defined as a water source heat pump cycle in which a second organic fluid is passed through a second heat exchanger (22), a transfer loop (30) having a heat transfer fluid (30) which receives heat by passing through a first heat exchanger (12) in the first loop (10) and gives heat by passing through a second heat exchanger (22) in the second loop (20), and a third heat exchanger (24) where the heat from the second loop (20) is made available for final use.

Description

[0001] HYBRID HEAT PUMP

[0002] FIELD OF INVENTION

[0003] The invention relates to a hybrid heat pump.

[0004] BACKGROUND OF THE INVENTION

[0005] Heat pumps are basically devices that transfer heat from a low-temperature environment to a high-temperature environment. They are used with heating and cooling functions with low energy consumption.

[0006] There are different types of heat pumps in the technique, especially air source and water source heat pumps. Heat pumps are named according to the medium from which they take the initial heat. In general, the higher the temperature of the medium from which the initial heat is taken, the higher the final temperature can be.

[0007] In some cases, such as steam generation, the temperature required is so high that the use of existing heat pumps is not very effective. In this case, high energy consumption necessitates additional heating or a mandatory input of waste heat into the system.

[0008] As a result, all the above-mentioned problems have made it imperative to innovate in the relevant technical field.

[0009] SUMMARY OF THE INVENTION

[0010] The present invention relates to a hybrid heat pump to overcome the aforementioned disadvantages and to bring new advantages to the relevant technical field. The aim of the invention is to provide a hybrid heat pump, to increase the efficiency and utilization of heat pumps.

[0011] Another object of the invention is to provide a hybrid heat pump to combine the advantages of using different types of heat pumps and to reduce their disadvantages.

[0012] Another object of the invention is to provide a hybrid heat pump that can be used as a heat source in steam generation plants.

[0013] In order to realize all of the above mentioned objects and the objects which are to be deducted from the detailed description below, the present invention is about a hybrid heat pump. Accordingly, it comprises a first cycle, defined as an air source heat pump cycle, in which a first organic fluid is passed through a first heat exchanger, a second cycle, defined as a water source heat pump cycle, in which a second organic fluid is passed through a second heat exchanger, a transfer cycle having a heat transfer fluid that receives heat by passing through the first heat exchanger in the first cycle and gives heat by passing through the second heat exchanger in the second cycle, and a third heat exchanger in which the heat from the second cycle is made available for end use. Thus, by gradually increasing the temperature of the fluids, output is achieved at temperatures that cannot be achieved with a standard heat pump.

[0014] In another preferred embodiment of the present invention, a first compressor provided in the first cycle comprises a first expansion valve and a condenser.

[0015] In another preferred embodiment of the present invention, the second cycle comprises a second compressor and a second expansion valve provided.

[0016] In another preferred embodiment of the present invention, at least one of the second cycle and the transfer cycle is configured to allow waste heat already present in the medium to be incorporated into the system. Thus, the efficiency of the system is increased. In another preferred embodiment of the present invention, a control unit is provided for deactivating the first cycle if the temperature of the second organic fluid entering the second cycle exceeds a predetermined critical temperature. Thus, heat transfer from the first cycle to the transfer cycle is stopped.

[0017] In another preferred embodiment of the present invention, the control unit can direct the first cycle to perform a cooling cycle if the fluid temperature continues to increase. Thus, the temperature of the fluid in the transfer cycle can be lowered or the temperature increase can be stopped when necessary.

[0018] In another preferred embodiment of the present invention, at least one temperature meter is provided for controlling the temperature of the second organic fluid. In particular, the temperature of the fluid entering the second compressor can thus be monitored.

[0019] In another preferred embodiment of the present invention, the temperature meter is provided in a plurality for controlling the temperatures of the first organic fluid and the heat transfer fluid. Thus, temperature variations in the cycles can be predicted or faults that may occur at some point in the system can be detected.

[0020] In another preferred embodiment of the present invention, the third heat exchanger is associated with a steam cycle to enable its use as a heat source in a steam generation process. Thus, the present invention hybrid heat pump can be used for steam generation.

[0021] In another preferred embodiment of the present invention, the first organic fluid is an organic fluid operating between 60-90 °C.

[0022] In another preferred embodiment of the present invention, the second organic fluid is an organic fluid operating between 110-180 °C. BRIEF DESCRIPTION OF THE FIGURES

[0023] Figure 1 shows representational schematic view of the cycles in the present invention hybrid heat pump.

[0024] DETAILED DESCRIPTION OF THE PROBABLE EMBODIMENT(S)

[0025] In this detailed description, hybrid heat pump (1 ) is explained with references to examples without forming any restrictive effect in order to make the subject more understandable.

[0026] The present invention hybrid heat pump (1 ) comprises a first cycle (10) which is an air source heat pump cycle, a second cycle (20) which is a water source heat pump cycle, and a transfer cycle (30) for heat transfer between the first cycle (10) and the second cycle (20). In another preferred embodiment of the subject matter invention, there is provided a steam cycle (40) which produces steam by taking heat from the second cycle (20).

[0027] The first cycle (10) is a cycle in which a first organic fluid is circulated. The air source heat pump cycle, defined as the first cycle (10), includes a first compressor (11 ), a first heat exchanger (12), a first expansion valve (13) and a condenser (14).

[0028] The second cycle (20) is a cycle in which a second organic fluid circulates. The water source heat pump cycle, defined as the second cycle (20), includes a second compressor (21 ), a second heat exchanger (22), a second expansion valve (23) and a third heat exchanger (24).

[0029] The transfer loop (30) has a pump (31 ) and the transfer loop (30) is associated with the first heat exchanger (12) in the first loop (10) and the third heat exchanger (24) in the second loop (20).

[0030] In the first cycle (10), as the first organic fluid passes through the first compressor (11 ), its pressure and temperature increase. The first organic fluid then passes through the first heat exchanger (12) and transfers some of its heat to the heat transfer fluid circulating in the transfer loop (30). After passing through the first heat exchanger (12), the first organic fluid passes through the first expansion valve (13) and a condenser (14) and then reaches the first compressor (11) again.

[0031] In the transfer loop (30), the heat transfer fluid pumped from the pump (31 ) receives heat from the first organic fluid in the first loop (10) as it passes through the first heat exchanger (12). Then, as it passes through the second heat exchanger (22) in the second cycle (20), it transfers the heat to the second organic fluid circulating in the second cycle (20). The second organic fluid passing through the second heat exchanger (22) passes through the second compressor (21 ) while its pressure and temperature are increased. The second organic fluid then passes through the third heat exchanger (24) and transfers its heat to another cycle to be used. In a preferred embodiment, this is a steam cycle (40). The second organic fluid passing through the third heat exchanger (24) then passes through the second expansion valve (23) and enters the second heat exchanger (22).

[0032] In an exemplary embodiment of the invention, the third heat exchanger (24) in the second cycle (20) is also associated with a steam cycle (40). By this means, superheated steam is obtained with the heat taken from the third heat exchanger (24). The storage of the fluid is provided by a tank (41) that can be used in the said steam cycle (40).

[0033] Through the said cycles, the temperatures of the fluids are gradually increased and transferred from one to the other, resulting in superheated steam.

[0034] In the said system, pressure and temperature can be measured at multiple points and the system's operation can be monitored. This is particularly important at the temperature of the fluid entering the compressors. Especially in the second compressor (21 ), the temperature of the entering fluid reaches critical values. In other words, as the inlet temperature of the fluid increases in compressors, the compressor may be affected by this temperature and may fail. In the present invention hybrid heat pump (1 ), after the cycles have started, the temperature of the heat transfer fluid used in the transfer cycle (30) can continue to rise while the system is operating. This increases the temperature of the second organic fluid used in the second cycle (20) and therefore also increases the temperature of the second organic fluid entering the second compressor (21 ). If the fluid temperature entering the second compressor (21 ) exceeds the critical value, there is a risk that the second compressor (21 ) will stop operating. In the hybrid heat pump (1 ) according to the invention, at least one temperature meter (51 ) monitors the temperature of the fluid entering the second compressor (21). When the temperature reaches a predetermined critical value, the first cycle (10) is stopped by a control unit (50) and the heat supply from the first cycle (10) to the transfer cycle (30) is stopped. This makes it possible to balance the temperature in the transfer cycle (30). This configuration both prevents the system from locking up due to temperature rise and reduces energy consumption by deactivating the first cycle (10) when the temperature rises. If, after the first cycle (10) has been deactivated, the temperature of the fluid entering the transfer loop (30) and / or the second compressor (20) continues to increase, the first cycle (10) can be started to operate in a cooling function. Therefore, it is ensured that the hybrid heat pump (1 ) continues to operate in any situation that may affect the temperatures in the system, such as outdoor temperature.

[0035] In another preferred embodiment of the subject matter invention, if there is waste heat in the environment where the present invention hybrid heat pump (1 ) will be used, the waste heat in the environment can be included in the system in the first cycle (10) or in the transfer cycle (30). This reduces the amount of energy required for the system to operate.

[0036] In another preferred embodiment of the subject matter invention, the first organic fluid is an organic fluid operating between 60-90 °C. In a possible configuration, organic fluid with the trade name 1234ze is used.

[0037] In another preferred embodiment of the subject matter invention, the second organic fluid is an organic fluid operating between 110-180 °C. In a possible configuration, organic fluid with the trade name R601 is used.

[0038] In another preferred embodiment of the subject matter invention, the heat transfer fluid may be water or an oil that can be used for heat transfer. The protection scope of the present invention is set forth in the annexed claims and cannot be restricted to the illustrative disclosures given above, under the detailed description. It is because a person skilled in the relevant art can obviously produce similar embodiments in the light of the foregoing disclosures, without departing from the main principles of the present invention.

[0039] REFERENCE NUMBERS

[0040] 1 Hybrid heat pump

[0041] 10 First cycle

[0042] 1 1 First compressor

[0043] 12 First heat exchanger

[0044] 13 First expansion valve

[0045] 14 Condenser

[0046] 20 Second cycle

[0047] 21 Second compressor

[0048] 22 Second heat exchanger

[0049] 23 Second expansion valve

[0050] 24 Third heat exchanger

[0051] 30 Transfer cycle

[0052] 31 Pump

[0053] 40 Steam cycle

[0054] 41 Tank

[0055] 50 Control unit

[0056] 51 Temperature meter

Claims

CLAIMS1. A hybrid heat pump (1), characterized in that it comprises a first cycle (10), defined as an air source heat pump cycle, in which a first organic fluid is passed through a first heat exchanger (12), a second cycle (20), defined as a water source heat pump cycle, in which a second organic fluid is passed through a second heat exchanger (22), a transfer cycle (30) having a heat transfer fluid that receives heat by passing through a first heat exchanger (12) in the first cycle (10) and gives heat by passing through a second heat exchanger (22) in the second cycle (20) and a third heat exchanger (24) where the heat from the second cycle (20) is put to end use.

2. A hybrid heat pump (1) according to claim 1 , wherein it comprises a first compressor (11 ), a first expansion valve (13) and a condenser (14) provided in the first cycle (10).

3. A hybrid heat pump (1) according to claim 1 , wherein it comprises a second compressor (21 ) and a second expansion valve (23) provided in the second cycle (20).

4. A hybrid heat pump (1) according to claim 1 , wherein at least one of the second cycle (20) and the transfer cycle (30) is configured to allow the incorporation of waste heat already present in the medium.

5. A hybrid heat pump (1) according to claim 1 , wherein it comprises a control unit (50) for deactivating the first cycle (10) when the temperature of the second organic fluid entering the second cycle (20) exceeds a predetermined critical temperature.

6. A hybrid heat pump (1 ) according to claim 5, wherein the controller can direct the first cycle (10) to perform a cooling cycle if the fluid temperature continues to increase.

7. A hybrid heat pump (1 ) according to claim 5, wherein it comprises at least one temperature meter (51 ) for controlling the temperature of the second organic fluid.

8. A hybrid heat pump (1 ) according to claim 7, wherein a plurality of temperature meters (51 ) are provided for controlling the temperatures of the first organic fluid and the heat transfer fluid.

9. A hybrid heat pump (1) according to claim 1 , wherein the third heat exchanger (24) is associated with a steam cycle (40) for use as a heat source in a steam generation process.10.A hybrid heat pump (1 ) according to claim 1 , wherein the first organic fluid is an organic fluid operating between 60-90 °C.

11. A hybrid heat pump (1 ) according to claim 1 , wherein the second organic fluid is an organic fluid operating between 110-180 °C.

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