KR101500489B1 - Ocean Thermal Energy Conversion System Using Discharge of Seawater Heat Pump - Google Patents

Abstract

The present invention relates to a marine thermal power generation system using sea water heat pump discharge water, comprising: a heat pump unit including a first evaporator for evaporating a refrigerant from a sea water as a heat source; And a second evaporator for evaporating the refrigerant that has passed through the second condenser with the surface water of the ocean as a heat source.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ocean thermal energy conversion system using seawater heat pump discharge water,

The present invention relates to an ocean temperature difference generation system using seawater heat pump discharge water, and more particularly, to a system for reducing the temperature difference between a deep ocean water and a marine middle water generated by using an ocean water to a deep sea water temperature by using a heat pump The present invention relates to a marine thermal power generation system capable of reducing water intake costs of deep sea water.

Fossil fuels such as coal, petroleum, and natural gas have been mainly used as energy sources for cooling and heating, which is one of the important factors for improving the living of the residents. However, fossil fuels pollute the environment by discharging various pollutants in the combustion process. As a result, global warming due to carbon dioxide emission is also occurring. Alternative energy that can replace fossil fuels is being actively developed.

Among these alternative energies, there are seawater, geothermal or sewage heat which can be directly used for cooling and heating, and a heat pump of high efficiency is inevitably required to use them effectively.

Such heat pumps can be classified into electric heaters, engine heaters, air heat sources, water heat sources (waste heat source heaters), and geothermal heaters according to their driving methods. The heat pumps can be classified into a hot air type, a cold air type, Depending on the use of cold water and pump, it can be divided into heating, cooling, dehumidification, and heating and cooling.

The heat pump is composed of a compressor, an evaporator, a condenser, an expansion valve, etc. Most of the heat pumps are used for both cooling and heating. In general, It is a new heat pump that replaces the air heat source because it is not only inefficient in operation due to mechanical damage but also because it is able to continuously supply heat even in harsh areas as well as energy efficiency. It is attracting attention.

That is, in the conventional air heat source type heat pump, when the temperature of the outdoor air is lowered during the cold weather in the winter, the evaporator pressure is reduced and the compressor is operated at an excessive compression ratio. As a result, the operation efficiency of the compressor is lowered. The overall system efficiency is degraded. Further, if the evaporation pressure is lowered, the refrigerant temperature at the compressor discharge port excessively rises, which may adversely affect the safety of the entire system.

Various types of hydrothermal heat pumps have been developed to solve the problems of the air heat source heat pump.

In general, oceanic temperature difference generation is a power generation system that uses ocean surface water with high temperature and deep ocean water with low water temperature as electricity of vaporization and condensation, respectively. For economical oceanic temperature difference development, it is necessary to continuously acquire a large amount of ocean surface waters and deep ocean waters.

There are many thermal and nuclear power plants on the coast of Korea, and mills generate more than millions of tons of high-temperature water per day.

Although there is seasonal fluctuation of the power plant drainage water, since it is discharged at a high temperature of usually 25 to 35 ° C, the temperature difference can be easily utilized for power generation. Deep ocean water used as cooling water is preserved in almost unlimited amount on the east coast of Korea. Since the water temperature is below 5 ℃, it can be used as cooling water for temperature difference power generation. If cold water using hot water and deep ocean water using power plant discharge water is used as ocean temperature difference power generation, commercial development is possible because water temperature difference of at least 20 ° C occurs.

The biggest problem of ocean temperature difference development is that a large amount of hot water and cold water are needed. It is very difficult to obtain a large amount of deep ocean water used as cooling water, while power plant effluent can secure a large amount of hot water of millions of tons per day or more. In Korea, the diameter of 500mm is the maximum diameter, while the diameter of 3000mm or more is necessary for commercial ocean temperature difference generation.

Therefore, in order to increase the efficiency of the ocean temperature difference power generation and improve the economic efficiency, it is necessary to develop a large-scale intake pipe capable of taking a large amount of deep sea water, or to develop a cycle that can be efficiently utilized when deep sea water is used as cooling water Is required. At present, the developed oceanic temperature difference power generation cycle has a problem of low power generation efficiency and economical efficiency because it uses only a simple primary cycle even when using the plant discharge water and deep sea water. In addition, even if a large-diameter water intake pipe is developed, a large-diameter water intake pipe must be buried to a depth of 5 ° C or less.

In addition, since the deep sea water is clean and eco-friendly, it can be used for aquaculture. However, since the water temperature is very low, it must be used for cultivation after heating. Although seaweeds and general fish species have an appropriate temperature of more than 10 ℃, it is disadvantageous in terms of energy cost to utilize deep seawater below 5 ℃ for aquaculture.

KR2011-0101754 10

The present invention solves the problems of the prior art, and it is possible to reduce the water intake cost of the deep ocean water by lowering the temperature difference between the deep ocean water and the marine middle water caused by using the middle water of the ocean to the deep ocean water temperature by using the heat pump The purpose of the present invention is to provide an ocean temperature difference power generation system.

The objects of the present invention are not limited thereto, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to accomplish the object of the present invention, an offshore temperature difference power generation system using sea water heat pump discharge water is provided with a heat pump unit including a first evaporator for evaporating refrigerant from a middle ocean water as a heat source, A second condenser for condensing the refrigerant with the middle layer water as a heat source, and a second evaporator for evaporating the refrigerant having passed through the second condenser with the surface water of the ocean as a heat source.

The circulation line may further include a circulation line for flowing the heated middle ocean water into the first evaporator while flowing through the second condenser.

In addition, it may further comprise a deep water supply line for flowing the deep ocean water to the second condenser.

Further, it may further include a discharge line for discharging the marine middle layer water that has passed through the first evaporator.

In addition, the heat pump unit may include a first condenser in which the refrigerant evaporated in the first evaporator is condensed, and the first condenser may provide a high heat source to the high heat source consumer.

In another category, a marine temperature difference power generation system using sea water heat pump discharge water for achieving the object of the present invention includes a first heat pump including a first evaporator for evaporating refrigerant from the ocean middle layer water as a heat source, And a third condenser for condensing the refrigerant to the heat source of the marine middle layer water that has passed through the first evaporator and the second evaporator, And a third evaporator for evaporating the refrigerant that has passed through the third condenser as a heat source.

At this time, the first evaporator and the second evaporator may be connected in parallel so that the marine middle layer water flows separately and flows.

The first heat pump may include a first condenser in which the refrigerant evaporated in the first evaporator is condensed and the second heat pump may include a second condenser in which the refrigerant evaporated in the second evaporator is condensed, The first condenser may provide a high heat source to a first high heat source consumer and the second condenser may provide a high heat source to a second high heat source consumer.

The first heat pump may include a first condenser in which the refrigerant evaporated in the first evaporator is condensed and the second heat pump may include a second condenser in which the refrigerant evaporated in the second evaporator is condensed, The first condenser and the second condenser may provide a high heat source to the high heat source consumer.

In addition, the first evaporator and the second evaporator may be connected in series so that the middle ocean layer water flowing in the first evaporator flows to the second evaporator.

The first heat pump may include a first condenser in which the refrigerant evaporated in the first evaporator is condensed and the second heat pump may include a second condenser in which the refrigerant evaporated in the second evaporator is condensed, The first condenser may be provided at a first high heat source consumer to provide a high heat source, and the second condenser may provide a high heat source to a second high heat source consumer.

The first heat pump may include a first condenser in which the refrigerant evaporated in the first evaporator is condensed and the second heat pump may include a second condenser in which the refrigerant evaporated in the second evaporator is condensed, The first condenser and the second condenser may provide a high heat source to the high heat source consumer.

The marine temperature difference power generation system of the present invention has the following effects.

First, instead of the deep ocean water used as a heat source of the ocean temperature difference power generation unit, the middle water layer of the ocean is lowered to a temperature corresponding to the deep ocean water by using a heat pump unit and used as a heat source of the ocean temperature difference power generation unit, The installation is easy and the installation cost of the water intake pipe is reduced.

Second, since the temperatures of the middle ocean water flowing into the heat pump unit and the discharge water discharged after flowing through the ocean temperature difference power generation unit are almost the same, environmental effects such as environmental changes due to the temperature change of seawater can be minimized.

Third, since the temperature of the middle ocean water flowing into the heat pump unit and the temperature of the discharge water discharged after flowing through the ocean temperature difference power generation unit are almost the same, the drain water can be circulated and reused into the heat pump unit, There is an effect that the amount of water intake can be minimized.

Fourth, the capacity difference between the heat pump unit and the ocean temperature difference power generation unit can be easily covered by additionally forming a deep water supply line and a discharge line. At this time, since the deep water supply line has a small amount of water intake, the installation cost of the water intake pipe is reduced compared with the conventional one.

Fifth, a high heat source generated in a condenser of a heat pump unit is provided to a high heat source consumer such as a dry room, so that it can be used in connection with various facilities requiring a high heat source such as salt harvesting.

Sixth, an ocean temperature difference power generation system using seawater heat pump drain water has an effect of easily securing a large amount of heat source since all heat sources are taken from the sea and used.

Seventh, by using a plurality of heat pumps in series or in parallel, it is possible to reduce the cost by using a heat pump of a small capacity or a low efficiency, or to provide a single heat pump with a spare heat pump Even if it can not be driven due to fixing, etc., there is an effect that continuous development is possible.

Eighth, a refrigerant line which flows in a plurality of condensers is connected in series to each of a plurality of condensers of a plurality of heat pumps, or a refrigerant line connected in series is provided with at least one high- It is possible to utilize it in a variety of high heat source demanding places which require the heat source.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, And shall not be interpreted.
Brief Description of the Drawings Fig. 1 is a block diagram of an ocean temperature difference power generation system using a sea water heat pump discharge water according to a first embodiment of the present invention; Fig.
FIG. 2 is a block diagram of an ocean temperature difference generation system using a sea water heat pump discharge water according to a second embodiment of the present invention; FIG.
3 is a block diagram of an ocean temperature difference generation system using a sea water heat pump discharge water according to a third embodiment of the present invention;
4 is a view illustrating a configuration of an ocean temperature difference generation system using a sea water heat pump discharge water according to a fourth embodiment of the present invention;
5 is a configuration diagram of a marine temperature difference generation system using a sea water heat pump discharge water according to a fifth embodiment of the present invention;
FIG. 6 is a block diagram of an ocean temperature difference generation system using a sea water heat pump discharge water according to a sixth embodiment of the present invention; FIG. And
FIG. 7 is a configuration diagram of an ocean temperature difference generation system using a sea water heat pump discharge water according to a seventh embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

1 is a configuration diagram of an ocean temperature difference power generation system using seawater heat pump discharge water according to the first embodiment of the present invention. As shown in FIG. 1, the offshore thermal power generation system 10 using the sea water heat pump discharge water according to the present invention is roughly composed of a heat pump unit 100 and an offshore temperature difference generation unit 200.

In general, since the ocean temperature difference generation unit 200 uses deep ocean water having a low temperature, it is expensive to install a water intake pipe for taking deep ocean water. At this time, the temperature of the ocean water is about 10 ° C, while the temperature of the deep water is about 5 ° C, which causes a temperature difference of about 5 ° C. In order to compensate for such a temperature difference, the temperature of the middle ocean water is lowered through the heat pump unit 100, and then is introduced into the ocean temperature difference generation unit 200 to be used for the ocean temperature difference generation.

1, the heat pump unit 100 includes a first evaporator 310, a compressor 400, a first condenser 510, and an expansion valve 600, which use the middle ocean water as a heat source, ).

The first evaporator 310 uses a middle-layer ocean water as a heat source for evaporating the refrigerant. At this time, the middle water in the ocean evaporates the refrigerant while the heat is taken away, and the temperature is lowered. In the first evaporator 310, about 5 ° C of heat is lost so that the number of the middle ocean layer, which is a heat source, can be a temperature similar to that of the deep ocean water.

That is, the middle ocean water flowing at a temperature of 10 ° C passes through the first evaporator 310, transfers heat to the refrigerant, and is discharged at a temperature of 5 ° C. Since the first evaporator 310 of the heat pump unit 100 lowers the temperature of the middle ocean water to a temperature similar to the temperature of the deep ocean water, the installation length of the water intake pipe for taking seawater used as a heat source is relatively shortened The installation of the water intake pipe is easy and the installation cost can be greatly reduced.

The compressor 400 is a device for raising the pressure of the gaseous refrigerant vaporized in the first evaporator 310 and delivering it to the first condenser 510.

The first condenser 510 is a device that receives heat from the high-temperature refrigerant and cools and condenses the refrigerant. The first condenser 510 is connected to a high-temperature source demanding unit 350 such as a drying room so that heat radiated to the outside from the first condenser 510 is supplied to the high-temperature demand customer 350.

As described above, the high-temperature source consumer (350) can be utilized as a drying room for producing salt by evaporating seawater. Here, the high-heat source consumer 350 may be used in various consumers requiring heat supply according to a general refrigeration cycle. In particular, the present invention can be utilized as a drying chamber for producing salt by evaporating seawater according to the surrounding environment in which the temperature difference power of the present invention is installed.

The expansion valve 600 is a valve for reducing the pressure of the high-temperature, high-pressure liquid refrigerant condensed and liquefied in the first condenser 510 to a pressure capable of causing evaporation by throttling action. In addition, the expansion valve 600 plays a role of regulating and supplying an appropriate amount of refrigerant capable of absorbing sufficient heat in the first evaporator 310.

The first evaporator 310, the compressor 400, the first condenser 510, and the expansion valve 600 described above constitute a general refrigeration cycle, and thus a detailed description thereof will be omitted.

The ocean temperature difference generation unit 200 comprises a second condenser 520, a pump 700, a second evaporator 320 and a turbine 800, as shown in FIG. The ocean temperature difference generation unit 200 is a device for generating electricity by driving the turbine 800 using a temperature difference between a low-temperature ocean middle-layer water (or deep ocean water) and a relatively high-temperature ocean surface water.

The second condenser 520 receives the middle ocean water discharged from the first evaporator 310 of the heat pump unit 100 at a temperature lowered to about 5 ° C to condense the refrigerant circulating in the ocean temperature difference power generation unit 200 . In this case, the seawater discharged after flowing through the second condenser 520 is discharged at a temperature of 10 ° C, which is the same temperature as that of the middle ocean water that is initially introduced, in order to minimize the environmental impact of the ocean, .

The pump 700 is a device for condensing in the second condenser 520 to improve the pressure of the refrigerant and flow to the second evaporator 320.

The second evaporator 320 evaporates and vaporizes the refrigerant flowing into the high pressure by the pump 700 using the ocean surface water as a heat source.

The turbine 800 is a device for evaporating and vaporizing the refrigerant in the second evaporator 320 to flow and to be driven to generate electricity.

The second condenser 520, the pump 700, the second evaporator 320, and the turbine 800 are conventionally used in the art, and a detailed description thereof will be omitted.

As described above, since the first evaporator 310, the second condenser 520, and the second evaporator 320 use seawater such as a middle-layer ocean water and ocean surface water as a heat source, it is possible to easily supply a large amount of heat source Therefore, it is easy to develop the ocean temperature difference.

In addition, compared with the conventional marine temperature difference power generation, since the installation length of the water intake pipe is relatively short, it is easy to install, the installation cost is reduced, and the high heat source that evaporates in the first condenser 510 of the heat pump unit 100 It is also possible to produce salt by evaporating seawater by installing a drying chamber.

The middle water layer of the ocean is used as the heat source of the first evaporator 310 through the heat pump unit 100 to transfer the heat to the refrigerant and the temperature is decreased, Since the temperature is lowered to the temperature corresponding to the deep water, when the water flows into the ocean temperature difference power generation unit 200, a sufficient temperature difference is generated between the surface water of the ocean and a smooth temperature difference is generated.

Second Embodiment

2 is a configuration diagram of a marine temperature difference power generation system using a sea water heat pump discharge water according to a second embodiment of the present invention. As shown in FIG. 2, the ocean temperature difference power generation system 10 according to the second embodiment has a configuration similar to that of the first embodiment as a whole, and the following description focuses on the configuration and operation that are different from each other.

The system for generating the differential pressure of the sea temperature in this embodiment comprises a circulation line 910 for introducing the seawater discharged from the second condenser 520 of the ocean temperature difference power generation unit 200 to the first evaporator 310 of the heat pump unit 100, .

The seawater discharged after flowing through the second condenser 520 of the marine temperature difference generation unit 200 is discharged at a temperature similar to the temperature of the middle ocean water flowing into the first evaporator 310 of the heat pump unit 100 Minimization of the intake of marine water is possible.

The seawater withdrawn amount is reduced by re-flowing the seawater flowing through the second condenser 520 of the ocean temperature difference power generation unit 200 through the circulation line 910 to the first evaporator 310 of the heat pump unit 100 It is possible to reduce the water intake cost.

Further, when the seawater is used through the repeated circulation, after the first marine middle layer water is introduced into the first evaporator 310 of the heat pump unit 100, it is possible not to take additional marine middle layer water or to take only a small amount of marine middle layer water have.

Meanwhile, the seawater flowing through the second condenser 520 may be partially re-introduced into the first evaporator 310 and partially discharged through the discharge line 930 according to the amount of heat source used by the heat pump unit 100. At this time, the discharged seawater is discharged at the same temperature as the first incoming ocean water, so that the environmental impact of the ocean can be minimized.

In this embodiment, the ocean temperature difference generation system may further include a deep water supply line 920 coupled with a line connecting the first evaporator 310 and the second condenser 520.

Therefore, the amount of seawater discharged after the temperature of the first evaporator 310 of the heat pump unit 100 is lowered due to the difference in capacity, efficiency, or the like is reduced by the amount of seawater discharged from the second condenser 520 ), It may be supplemented if it is relatively small.

The deep water supply line 920 is connected to the line connecting the first evaporator 310 and the second condenser 520 through a valve and can directly supply the deep ocean water if necessary. That is, the seawater having the temperature corresponding to the deep seawater flowing down from the first evaporator 310 is lowered, and the deep seawater directly supplied through the deep sea water supply line 920 is mixed with the sea water, And then supplied to the second condenser 520.

At this time, it is necessary to install the water intake pipe to a depth sufficient to receive the deep sea water to take in the deep sea water. However, since the amount of the deep sea water used is relatively small as compared with the conventional technology, the diameter of the water intake pipe can be made thin Therefore, the installation cost of the intake pipe can be reduced.

Third Embodiment

3 is a configuration diagram of an ocean temperature difference power generation system using a sea water heat pump discharge water according to a third embodiment of the present invention. As shown in FIG. 3, the system 10 for generating a marine heat pump discharge water according to the third embodiment of the present invention has a configuration similar to that of the second embodiment as a whole. However, contrary to the second embodiment, this is an embodiment for the case where the capacity of the heat pump unit 100 is relatively larger than that of the ocean temperature-difference power generation unit 200. [

At this time, since the capacity of the heat pump unit 100 is larger than that of the marine temperature difference power generation unit 200, the marine middle layer water whose temperature is lowered from the first evaporator 310 of the heat pump unit 100, Since it can not be accommodated in the second condenser 520 of the second condenser 200, a discharge line 930 for discharging it is further provided. That is, only the amount of the water discharged from the first evaporator 310 of the heat pump unit 100 flows into the lower middle ocean water of the oceanic temperature difference power generation unit 200, which is acceptable by the second condenser 520, And is discharged to the ocean through the discharge line 930.

In the third embodiment, as in the second embodiment, the sea water discharged after flowing through the second condenser 520 of the ocean temperature difference power generation unit 200 is re-introduced into the first evaporator 310 of the heat pump unit 100 A circulation line 910 may be provided.

Since there is seawater discharged from the second condenser 520 and flowing into the first evaporator 310, only a small amount of the capacity of the middle ocean water flowing into the second condenser 520 can be introduced.

Fourth Embodiment

4 is a configuration diagram of an ocean temperature difference power generation system using a sea water heat pump discharge water according to a fourth embodiment of the present invention. 4, the system 10 includes a heat pump unit 100 including a first heat pump 110 and a second heat pump 120, And an ocean temperature difference generation unit 200.

The first heat pump 110 is composed of a first evaporator 310, a first compressor 410, a first condenser 510, a first expansion valve 610 and a first high heat source consumer 351, The configuration is the same as that of the heat pump unit 100 of the first embodiment.

The second heat pump 120 is composed of a second evaporator 320, a second compressor 420, a second condenser 520, a second expansion valve 620 and a second high heat source consumer 352, The configuration is the same as that of the first heat pump 110.

At this time, in the first evaporator (310) of the first heat pump (110) and the second evaporator (320) of the second heat pump (120), the middle ocean water inflow line They are connected in parallel.

Each of the first heat pump 110 and the second heat pump 120 has the same capacity as that of the marine temperature difference power generation unit 200 and one of the first heat pump 110 and the second heat pump 120 has a failure It can also be used as a reserve for

The first heat pump 110 and the second heat pump 120 are controlled such that the combined capacity of the first heat pump 110 and the second heat pump 120 is the same as that of the ocean temperature difference power generation unit 200, May be simultaneously driven. When the combined capacity of the first heat pump 110 and the second heat pump 120 becomes equal to that of the ocean temperature difference power generation unit 200, the first evaporator 310 and the second evaporator 320 pass through And then flows into the third condenser 530 of the ocean temperature difference power generation unit 200.

That is, since the heat source supply lines passing through the first evaporator 310 and the second evaporator 320 are connected in parallel, the heat pump unit 100 is relatively smaller than the heat pump unit 100 used in the first to third embodiments Even if the heat pump of the capacity of the first evaporator 310 and the second evaporator 320 is used, the ocean water temperature generating unit 200 can meet the required capacity have.

The first condenser 510 of the first heat pump 110 and the second condenser 520 of the second heat pump 120 are connected to the first high heat source consumer 351 and the second high heat source consumer 352, So that they can be used for various purposes such as drying different types of dried materials.

When the first heat pump 110 and the second heat pump 120 are set at mutually different capacities, the heat radiated from the first condenser 310 and the second condenser 320 varies, It is possible to provide different temperature conditions to the customer 351 and the second high-heat source consumer 352. Accordingly, since different high heat sources are supplied to the respective high heat source consumers 351 and 352, a plurality of high heat source consumers 350 can be used as various drying rooms or other facilities corresponding to the respective temperatures.

The third embodiment comprises a third condenser 530, a pump 700, a third evaporator 330, and a turbine 800, and this configuration is the same as that of the first embodiment .

Fifth Embodiment

5 is a configuration diagram of an ocean temperature difference power generation system using a seawater heat pump discharge water according to a fifth embodiment of the present invention. As shown in FIG. 5, the offshore temperature difference power generation system 10 using the seawater heat pump discharge water according to the fifth embodiment has a configuration similar to that of the fourth embodiment as a whole.

However, the refrigerant line passing through the first condenser 510 and the second condenser 520 is connected in series and is provided to provide a high-temperature source to at least one high-temperature source customer 350 on the refrigerant line connected in series . Since the lines connected to the high-heat source consumer 350 are connected in series, the efficiencies of the first condenser 510 and the second condenser 520 may be different from each other. As shown in FIG. 5, since the refrigerant passing through the high-temperature source consumer 350 passes through the second condenser 520 after passing through the second condenser 520, 2 condenser 520 have different efficiencies or the first condenser 510 and the second condenser 520 have the same efficiency, the high-temperature heat source having a higher temperature as compared with the fourth embodiment is used as the high- (350).

In FIG. 5, only one high-heat source consumer 350 is illustrated, but a plurality of high-heat source consumers 350 connected in series may be provided. In this case, since the heated refrigerant sequentially passes through the plurality of high-heat-demand consumers 350, the temperature of each high-temperature-demand consumer 350 may vary. That is, the high heat source consumer 350 in which the heated refrigerant first flows can obtain the highest heat source, and gradually obtains a low heat source in sequence. Since different high heat sources are supplied to a plurality of high heat source consumers 350, a plurality of high heat source consumers 350 can be used as various drying rooms or other facilities corresponding to respective temperatures.

The turbine 800 includes a third condenser 530, a pump 700, a third evaporator 330, and a turbine 800. This configuration is the same as that of the first embodiment. .

Sixth Embodiment

6 is a configuration diagram of a marine temperature difference power generation system using a sea water heat pump discharge water according to a sixth embodiment of the present invention. As shown in FIG. 6, the ocean temperature difference power generation system 10 according to the sixth embodiment has a configuration similar to that of the fourth embodiment as a whole.

However, the line for supplying the marine middle layer water is connected in series with the first evaporator 310 and the second evaporator 320. Since the middle ocean water layer is connected in series with the first evaporator 310 and the second evaporator 320, the middle ocean water flows sequentially through the first evaporator 310 and the second evaporator 320 .

Since the marine middle layer water flows sequentially through the first evaporator 310 and the second evaporator 320, the temperature of the middle ocean water is first lowered in the first evaporator 310 and the temperature of the middle ocean water is lowered in the second evaporator 320 The temperature of the intermediate ocean water is lowered secondarily to the temperature required by the third condenser 530 of the ocean temperature difference power generation unit 200 and supplied to the third condenser 530. [

Since the first evaporator 310 and the second evaporator 320 sequentially flow, the first heat pump 110 and the second heat pump 110, which are relatively less efficient than the heat pump unit 100 composed of one heat pump, 120 may be used to lower the temperature of the middle ocean water to the temperature of the heat source required by the ocean temperature difference generation unit 200.

For example, when the temperature of the middle ocean water flowing into the first evaporator 310 is 10 ° C, the second evaporator 320 flows through the first evaporator 310 to lower the temperature of the middle ocean water to about 8 ° C, The middle ocean water flowing into the second evaporator 320 at a temperature of about 8 ° C flows through the second evaporator 320 and is supplied to the third condenser 530 of the ocean temperature difference power generator The temperature of the marine middle layer water can be lowered to 5 ° C.

Since the heat source supply lines that pass through the first evaporator 310 and the second evaporator 320 are connected in series, the heat pump unit 100 can be operated in a relatively lower temperature than the heat pump unit 100 used in the first to fifth embodiments. Even if a heat pump having a low efficiency is used, the temperature of the middle ocean water can be lowered to a sufficient temperature by sequentially flowing through the first evaporator 310 and the second evaporator 320.

As the evaporation temperatures of the first evaporator 310 and the second evaporator 320 are different from each other, the condensation temperatures of the first and second condensers 510 and 520 are also different from each other, The first high-heat-source consumer 351 and the second high-heat-source consumer 352 are supplied with different high-temperature sources, and therefore the first high-temperature-demand consumer 351 and the second high- It can be used as a facility.

The third embodiment of the present invention is the same as the first embodiment except that the third embodiment of the present invention is applied to the third embodiment of the present invention in which the third embodiment comprises a third condenser 530, a pump 700, a third evaporator 330 and a turbine 800, .

Seventh Embodiment

FIG. 7 is a configuration diagram of an ocean temperature difference generation system using a sea water heat pump discharge water according to a seventh embodiment of the present invention. As shown in FIG. 7, the marine temperature difference power generation system 10 using the seawater heat pump discharge water according to the seventh embodiment has a configuration similar to that of the sixth embodiment as a whole.

However, the refrigerant line passing through the first condenser 510 and the second condenser 520 is connected in series and is provided to provide a high-temperature source to at least one high-temperature source customer 350 on the refrigerant line connected in series . Since the lines connected to the high-heat source consumer 350 are connected in series, the efficiencies of the first condenser 510 and the second condenser 520 may be different from each other.

As shown in FIG. 7, since the refrigerant passing through the high-temperature source consumer 350 first passes through the second condenser 520 and then passes through the second condenser 520, 2 condenser 520 have different efficiencies or the first condenser 510 and the second condenser 520 have the same efficiency, the high-temperature heat source having a higher temperature as compared with the sixth embodiment is used as the high- (350).

In FIG. 7, only one high-heat source consumer 350 is shown, but a plurality of high-heat source consumers 350 connected in series may be provided. In this case, since the heated refrigerant sequentially passes through the plurality of high-heat-demand consumers 350, the temperature of each high-temperature-demand consumer 350 may vary.

That is, the high heat source consumer 350 in which the heated refrigerant first flows can obtain the highest heat source, and gradually obtains a low heat source in sequence. Since different high heat sources are supplied to a plurality of high heat source consumers 350, a plurality of high heat source consumers 350 can be used as various drying rooms or other facilities corresponding to respective temperatures.

The third embodiment comprises a third condenser 530, a pump 700, a third evaporator 330, and a turbine 800, which are the same as the first embodiment .

As described above, those skilled in the art will understand that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10: Marine temperature difference generation system (using sea water heat pump discharge water)
100: Heat pump unit
110: first heat pump
120: second heat pump
200: Ocean temperature difference power generation unit
310: first evaporator
320: Second evaporator
330: Third evaporator
350: High heat source demand source
351: First High Heat Source Demand Source
352: Second High Heat Source Demand Source
400: Compressor
410: first compressor
420: second compressor
510: first condenser
520: second condenser
530: Third condenser
600: expansion valve
610: first expansion valve
620: second expansion valve
700: pump
800: Turbine
910: Circular line
920: Deep water supply line
930: discharge line

Claims (12)

A heat pump unit including a first evaporator for evaporating refrigerant from a middle ocean water layer as a heat source; And
A second condenser for condensing the refrigerant to a heat source through the middle ocean water having a temperature lowered through the first evaporator, and a second evaporator for evaporating the refrigerant having passed through the second condenser with the surface water of the ocean as a heat source, unit;
A circulation line for flowing the heated middle ocean water into the first evaporator while flowing through the second condenser; And
And a deeper water supply line for replenishing and flowing the deep ocean water to the second condenser when the amount of the ocean water in the middle of which the temperature has dropped through the first evaporator is smaller than the amount required in the second condenser Ocean temperature difference generation system using seawater heat pump discharge water. delete delete The method according to claim 1,
Further comprising a discharge line for discharging the marine middle layer water that has passed through the first evaporator. The method according to claim 1,
Wherein the heat pump unit includes a first condenser in which the refrigerant evaporated in the first evaporator is condensed,
The first condenser is an ocean temperature difference power generation system using a seawater heat pump drain water for providing a high heat source to a high heat source consumer. A heat pump unit including a first heat pump including a first evaporator for evaporating a refrigerant into a middle ocean water layer as a heat source and a second heat pump including a second evaporator for evaporating the refrigerant as a heat source for the marine middle layer water; And
A third condenser for condensing the refrigerant to the heat source in the middle ocean water that has passed through the first evaporator and the second evaporator, and a third evaporator for evaporating the refrigerant passing through the third condenser, Comprising a power generation unit,
Wherein the first evaporator and the second evaporator are connected in parallel so that the marine middle layer water can flow in and flow separately. delete The method according to claim 6,
Wherein the first heat pump includes a first condenser in which the refrigerant evaporated in the first evaporator is condensed,
Wherein the second heat pump includes a second condenser in which the refrigerant evaporated in the second evaporator is condensed,
The first condenser provides a high heat source to a first high heat source consumer and the second condenser provides a high heat source to a second high heat source consumer. The method according to claim 6,
Wherein the first heat pump includes a first condenser in which the refrigerant evaporated in the first evaporator is condensed,
Wherein the second heat pump includes a second condenser in which the refrigerant evaporated in the second evaporator is condensed,
Wherein the first condenser and the second condenser are a sea temperature difference power generation system using a seawater heat pump drain water for providing a high heat source to a high heat source consumer. And a second evaporator connected in series with the first evaporator to evaporate refrigerant from the middle-layer ocean water flowing in the first evaporator as a heat source, and a second evaporator for evaporating the refrigerant, A heat pump unit including a first heat pump and a second heat pump; And
A third condenser for condensing the refrigerant to the heat source, and a third evaporator for evaporating the refrigerant that has passed through the third condenser and the ocean surface water as a heat source, Marine temperature difference power generation system using heat pump discharge water. 11. The method of claim 10,
Wherein the first heat pump includes a first condenser in which the refrigerant evaporated in the first evaporator is condensed,
Wherein the second heat pump includes a second condenser in which the refrigerant evaporated in the second evaporator is condensed,
Wherein the first condenser is provided in a first high heat source consumer to provide a high heat source and the second condenser is a sea heat pump discharge water using a sea heat pump discharge water to provide a high heat source to a second high heat source consumer. 11. The method of claim 10,
Wherein the first heat pump includes a first condenser in which the refrigerant evaporated in the first evaporator is condensed,
Wherein the second heat pump includes a second condenser in which the refrigerant evaporated in the second evaporator is condensed,
Wherein the first condenser and the second condenser are a sea temperature difference power generation system using a seawater heat pump drain water for providing a high heat source to a high heat source consumer.

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