JPH04128570A - Ocean temperature difference power generator device - Google Patents

Abstract

PURPOSE:To effectively utilize the excessive energy stored at night when the electric power demand is little, in the daytime, by installing a storing device for the warm sea water having the higher water level than the sea water level, pump for pumping up the sea water into the storing device, and a water wheel driven by the stored warm sea water. CONSTITUTION:The heating medium such as ammonia is evaporated by the heat of the warm sea water in an evaporator 2. The warm sea water is pumped up from an ocean surface layer by a warm ocean water pump 3, and after the ammonia is temperature-raised and evaporated, it is returned into the ocean. After the gas/liquid separation by a separator 4, the ammonia vapor is supplied into a turbine 5, which is driven, and then the ammonia vapor is cooled by the cold sea water, and condensed. While, the sea water is pumped and stored in a storing device 13 by a water pump 12 driven by a motor 17 by utilizing the electric power which becomes excessive at night, etc., when the electric power demand is little. The warm sea water in a storing device 13 is introduced into a water wheel 14 in the daytime, etc., when the electric power demand is much, and the water wheel 14 is revolved to drive a cold sea water pump 8, and the cold sea water is allowed to circulate through the condenser 7.

Description

[Detailed description of the invention] ``Industrial Application Fields'' This invention uses surplus electricity to pump warm seawater at night when electricity demand is low, stores it as niobium, and uses the stored energy during the daytime when electricity demand is high. This invention relates to an ocean temperature difference power generation device that can be used effectively.

[Conventional technology] A power generation device has been proposed that utilizes the temperature difference between warm seawater on the surface of the ocean and cold seawater in the deep ocean, and it is easy to generate electricity in deep seawater, where the temperature of warm seawater on the surface of the ocean is high and the temperature of cold seawater is low. On the resulting tropical and subtropical islands, power plants were actually constructed and operated on a trial basis, for example, in Hawaii, the Republic of Nauru, and Tokunoshima in Japan.

FIG. 6 is an explanatory diagram showing the basic configuration of these ocean temperature difference power generation devices. Ammonia, fluorocarbon, etc. are mainly used as the heat medium. In Fig. 0, 2 is an evaporator. Ammonia as a heat medium is evaporated in the evaporator 2 by the heat of the warm seawater. Warm seawater is pumped up from the ocean surface layer by a warm seawater pump 3, heated in an evaporator 2 to evaporate and gasify a heat medium such as ammonia, and then returned to the ocean. The heat medium, such as ammonia vapor, evaporated by raising the temperature is separated into gas and liquid in the separator 4. The heat medium in a vapor state enters the turbine 5 and drives the turbine 5, and then is cooled by cold seawater in the condenser 7 and condensed to become a liquid. Cold seawater for cooling the heat medium in the condenser 7 is pumped up from the deep ocean by a cold seawater pump 8, exchanged with heat in the condenser 7, and then returned to the ocean.

The cooled and condensed heat medium is stored in a heat medium tank 9 and sent to the evaporator 2 again by a heat medium pump 10.
It is evaporated and drives the turbine 5 to generate electricity. The shaft of the turbine 5 is directly connected to the generator 6, and when the turbine 5 is driven by the heat medium, the power generation fi6 rotates and generates electricity.

There are 2 features of the ocean temperature difference power generation device! Since the power is extracted by using the slight temperature difference between seawater and cold seawater, a large proportion of the power required for the warm seawater pump 2 and the cold seawater pump 8 is required. Utilizing power is an important matter to improve the efficiency of ocean thermal power generation devices.

Here, a proposal related to technology that meets the above issues is published in JP-A-62
-93486. That is, the external shape is a transverse conical shape, a hot water intake is opened at the leading end of the transverse conical shape, a drainage port is provided at the tail end of the conical shape, and a kite is provided on the outer periphery. use,
This is a temperature difference power generation device characterized by having a propulsive force that prevents it from being washed away by tidal currents. FIG. 7 is an explanatory diagram showing an outline of the configuration of the proposed ocean temperature difference power generation device.

In the figure, 71 is an offshore plant. 72 is a temperature difference power generation device. 73 is a warm seawater intake port, and 74 is a drainage port. 75 is a cold seawater intake. 76 is a guide vane. 77 indicates the ffi current, and 78 indicates the sea level. 79 is a thruster.

A spindle-shaped temperature control device 72 in the shape of an airship installed below the sea surface 78 of the offshore plant 71 directs the warm seawater intake lower 3 at its leading end to face the tidal current 77 using a guide page 76 to collect warm seawater. Water intake was made possible by applying extremely little power to the thruster 79.

[Problem to be solved by the invention] However, according to the conventional proposals, it cannot be used for anything other than supplying the necessary power in offshore plants, and 11! Power generation is only possible at sea, which is far away from land where the current is fast.

Transmitting electricity from the ocean, which is far from land, to areas of high demand is extremely difficult. Therefore, there was a desire to provide an ocean temperature difference power generation device that is firmly attached to land.

In addition, in a situation where power demand differs between daytime and nighttime, it is desired to provide an ocean temperature difference power generation device that can store surplus energy during the nighttime when demand is low and effectively utilize the stored energy during the daytime. It had been.

[1! Means for Solving the Problem The ocean temperature difference power generation device according to the present invention is a power generation device that utilizes the temperature difference between warm seawater on the surface of the ocean and cold seawater in the deep ocean. It is characterized by comprising a seawater storage device, a pump for pumping seawater to the storage device, and a water wheel driven by the warm seawater stored in the storage device.

[Function] The ocean temperature difference power generation device according to the present invention is equipped with a storage device for warm seawater having a water level higher than the sea level and a pump for pumping seawater into the storage device, and uses surplus electricity at night when electricity demand is low. pumping seawater into the storage device;
Since the cold seawater pump is driven by a water wheel driven by stored warm seawater during daytime power generation, surplus power at night is effectively utilized and ocean temperature difference power generation is performed efficiently.

[Example] The present invention will be explained below with reference to the drawings. FIG. 1 is an explanatory diagram showing the basic configuration of an ocean temperature difference power generation device in which the present invention is implemented.
7, 8, 9, and 10 are as explained in FIG.

Here, a case where ammonia is used will be described as an example. The heat medium made of ammonia is evaporated in the evaporator 2 by the heat of the warm seawater. Warm seawater is pumped up from the ocean surface layer by a warm seawater pump 3, and ammonia is heated and evaporated in an evaporator 2 before being returned to the ocean. The ammonia evaporated by raising the temperature is separated into gas and liquid in the seven daughters 4. Gaseous ammonia is produced by turbine 5.
After entering the water and driving the turbine 5, it is cooled by cold seawater in the condenser 7 and condensed to become a liquid.

Using surplus electricity at nighttime when electricity demand is low -
), the seawater is transferred to the storage device by a water storage pump 12 and a motor 17.
The warm seawater is pumped up and stored in the storage device F13. The highest water level of the storage device 213 is 20M above sea level, and the water surface of the storage device 3 is a square with sides of 100M. The capacity of motor 17 is 200KW. During the daytime when the demand for electricity is high, warm seawater stored in the storage device [13] is guided to the water wheel 14, which is driven to supply the water to the post-evaporator 2. During the daytime when the demand for electricity is high, the warm seawater pump 3 is stopped or operated with a reduced load.

When the water turbine 14 is driven by this warm seawater, the motor 15 of the cold seawater pump 8 disengages the clutch 1 (on the motor side) and the cold seawater pump 8 is driven by the water 14. is 25-33℃, and the temperature of cold seawater is 4
~7"C, the amount of warm seawater used is 5000 T/H, and the amount of cold seawater used is 4000 T/H. Evaporator 2
The heat medium of ammonia gas in the condenser 7 is 10Kg/c at 25℃, and the ammonia in the condenser 7 is 6℃ at 10℃.
7 cm" is circulated by the heat medium pump 10. The amount of ammonia circulated is 60 T/H. The heat medium drives the turbine 5, and the generator TFI 6 whose shaft is directly connected to the turbine 5 generates electricity. The power generation capacity of the 0 generator 6 is 500Xlll.

Furthermore, FIG. 2 shows a part related to warm seawater in another embodiment of the present invention. The pump 19 is operated to pump up warm seawater by two warm seawater pumps, and a portion of the pumped warm seawater is supplied to the evaporator 2, and the rest is repressurized by the water storage pump 12 and stored in the storage device 13. Store in. Furthermore, FIG. 3 shows a portion relating to warm seawater in still another embodiment of the present invention.5 Here, a case where a water storage pump and a water wheel are used in common is shown.In FIG. 3, 18 is a bombu water wheel shared machine. When using the Bombu water turbine shared machine] 8 as a water intake pump, connect the clutch 16 on the motor side and release the clutch on the opposite side.

In addition, in all of the above eight embodiments, in which the connection is reversed when used as a water turbine, surplus power during two nights can be effectively utilized, and ocean temperature difference power generation can be efficiently performed during the day. Previously the fifth
As shown in the figure, the rated output of the generator was required to be the value of the maximum power demand plus the sum of the power of the heat medium pump, warm seawater pump, and cold seawater pump, that is, the sum of the power within the station. Therefore, when the demand for electricity decreases at night, the shaded area in the figure cannot be utilized. However, according to the ocean temperature difference power generation according to this invention, the rated output of the power generation device is the maximum as shown in section 4. It can be seen that the rated output of the power generation device can be significantly reduced because only the power demand of the heat medium pump is added to the power demand of . Furthermore, according to the ocean temperature difference power generation according to the present invention, the shaded area in FIG. With the above configuration, energy stored during the night can be effectively used during the day, and ocean temperature difference power generation with low equipment costs and low power generation costs can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of an ocean temperature difference power generation device in which this invention is implemented, FIG. 2 is an explanatory diagram showing a part related to warm seawater of another embodiment of this invention, and FIG. An explanatory diagram showing a part between warm seawater of still another embodiment of the invention,
Fig. 4 is an explanatory diagram explaining the details of this invention, and Fig. 5 is an explanatory diagram 2 regarding the rated output, etc. of the conventional ocean temperature landing device.
FIG. 6 is an explanatory diagram showing the configuration of a conventional ocean temperature difference power generation device, and FIG. 7 is an explanatory diagram showing the configuration of a conventional proposed ocean temperature difference power generation device. 2. Evaporator, 3- Warm seawater pump, 4. Separator,
5. Turbine, 6. Generator, 7. Condenser, 8. Cold seawater pump, 9. Heat medium tank, 10. Heat medium pump, 12. Water storage pump, 13. Storage device, 14. Water turbine, 15 Motor, 16 ・Clutch, 17・Motor, 18...Pump-water turbine shared machine, 19・Pre-warmed seawater pump 6

Claims (1)

[Claims] A power generation device that utilizes the temperature difference between warm seawater on the surface of the ocean and cold seawater in the deep ocean, which includes a storage device for warm seawater with a water level higher than the seawater level, a pump for pumping seawater to the storage device, and storage in the storage device. An ocean temperature difference power generation device comprising: a water wheel driven by heated seawater.