KR20220139837A - Power generation system using fluid circulation - Google Patents

Abstract

The present invention relates to a power generation system using fluid circulation, and more specifically, to a power generation system using fluid circulation, which pumps fluid (water) stored in a water tank to a predetermined height, and generates the electric energy by using the height energy produced by dropping the pumped fluid, thereby recycling the fluid. To this end, the power generation system using fluid circulation according to the present invention comprises: a water tank in which fluid is stored; a water pumping pump which pumps the fluid stored in the water tank; a suction pipe which is arranged between the water pumping pump and the water tank to suck and transfer the fluid in the water tank by the operation of the water pumping pump; a discharge pipe which comprises a discharge upper pipe to raise the fluid discharged from the water pumping pump to a predetermined height, and a discharge lower pipe which is extended from the discharge upper pipe to guide the fluid to the water tank; and a power generation device which is installed at the discharge lower pipe to produce the electric energy by using the height energy of the discharged fluid. Therefore, water pumping may be easily performed.

Description

Power generation system using fluid circulation {POWER GENERATION SYSTEM USING FLUID CIRCULATION}

The present invention relates to a power generation system using fluid circulation, and more particularly, by pumping a fluid (water) stored in a water tank to a certain height and using the height energy generated by dropping the pumped fluid to produce electrical energy, It relates to a power generation system using fluid circulation that can reuse the fluid.

It is known that the use of small hydropower not only produces electricity by utilizing domestic renewable energy resources, but also promotes regional development through the development of clean energy sources, and the economic ripple effect from this is also known to be very large. Although small-scale hydroelectric power generation is a classic technology, it is a technology that can be established even with pure domestic technology combining IT technology and eco-friendly technology, and the planning, design and construction period is fast.

Although hydroelectric energy accounts for only 14% of electricity production and 84% of the capacity of each power generation facility in the reality of Korea's energy policy, it has played an important role as an energy source.

First of all, hydroelectric energy, which has excellent supply stability and long-term stable and cheap power generation price, is worth continuously developing as an alternative energy to petroleum with high technical skill. In addition, hydropower is a renewable and purely domestic energy, and at the same time contributes to energy stability and contributes to the prevention of global warming as a clean energy that does not emit carbon dioxide (CO2), so the need for development is increasing.

As a form of hydroelectric power generation, there is a pumped pump that pumps water from the lower reservoir to the upper reservoir at night or when power is plentiful, then waterproofs it when power is needed and generates power.

As one of the technologies for pumped-water power generation, a small hydro power generation system was disclosed in Korean Patent Publication No. 10-1933012.

The technology includes a storage tank in which liquid is stored; a pump for supplying the liquid stored in the storage tank to the point of use; a main line connecting the storage tank and the pump as well as connecting the pump and the place of use; branch lines branching from the main line; And one side is coupled to the storage tank and the other side is connected to the branch line and includes a generator generated by the liquid supplied through the branch line, the liquid passing through the generator is supplied to the storage tank, and the pump operates at all times, but It is characterized in that it is a pump that recirculates the minimum flow rate to prevent overload due to the flow rate of the pump not flowing.

In addition, Korean Patent Publication No. 10-2125054 discloses a power and cooling water supply system for a data center using a tidal current/pumped water power generation system.

The technology is driven by a tidal force to generate electrical energy; a pump for pumping up seawater to the upper part by using the electric energy generated by the tidal power generation unit; a storage unit for storing seawater transferred by the pump for pumping; a small hydro power generation unit for generating electrical energy by seawater falling from the storage unit; Including; an integrated control unit for controlling the tidal current generation unit, the pump and the small hydro power generation unit, the integrated control unit, the power generated by the tidal power generation unit or the power generated by the small hydro power generation unit to supply to the data center is composed

However, in the case of the above techniques, the height and capacity that can be pumped vary according to the performance of the pump for pumping the fluid. Accordingly, as the capacity of the pump increases, more power is consumed, thereby reducing the efficiency of the circulating power generation system.

Registered Patent Publication No. 10-1933012 (2018. 12. 20.) Registered Patent Publication No. 10-2125054 (2020. 06. 15.)

The present invention has been devised to solve the above problems, and the problem to be solved in the present invention is to reduce the load on the pumping pump, so that even if a low-capacity pump is applied, a power generation system using a fluid circulation that can easily perform pumping. is to provide

Another object of the present invention is to provide a power generation system using fluid circulation capable of producing and supplying surplus electrical energy while driving the pumping pump through hydraulic power generation by application of a low-capacity pumping pump.

Power generation system using fluid circulation according to the present invention for solving the above problems is a water tank in which the fluid is stored; a pump for pumping the fluid stored in the water tank; a suction pipe disposed between the pumping pump and the water tank to suck and transport the fluid in the water tank by driving the pump; a discharge pipe including a discharge pipe through which the fluid discharged from the pumping pump rises to a predetermined height and a discharge pipe extending to the discharge pipe to guide the fluid into the water tank; It is installed in the discharge lower pipe and includes a power generation device for producing electric energy by using the height energy of the discharged fluid.

Here, rainwater is stored, and it may be configured to further include a rainwater storage tank including a rainwater supply pipe for supplying the stored rainwater to the discharge lower pipe, and the fluid stored in the rainwater storage tank is to conserve the loss of fluid in the tank or , characterized in that it is supplied to the discharge lower pipe.

In addition, the water tank may be provided with a multi-stage baffle that partitions a suction part in which the suction pipe is immersed in the fluid and a drop part in which the fluid discharged from the discharge lower pipe falls.

In this case, a screen for filtering foreign substances contained in the fluid may be installed in the multi-stage baffle.

In addition, the power generation device uses a first generator for producing electric energy using a propeller aberration installed inside the discharge lower pipe and a Pelton water wheel installed at the end of the discharge lower pipe to generate electrical energy Includes a second generator to produce.

According to the present invention, the principle of the siphon is applied by the flow of the fluid that is guided downward and passes through the discharge lower pipe, so that the load on the pump is reduced, and as the load on the pump is reduced, the power applied to the pump is reduced. Thus, there is an advantage in that the power generated by the power generation device installed in the discharge pipe can produce surplus power, excluding the power required to drive the pumping pump.

In addition, the power generation system using fluid circulation according to the present invention can be applied to not only pico hydropower (5KW or less) but also mini hydropower (100KW ~ 1,000KW), so that even in areas where supply from KEPCO is alienated There are advantages to using it.

In addition, since the loss of the fluid is reduced through the recirculation of the fluid, the cost associated with the operation can be minimized, and thus there is an advantage in that electricity can be produced at low cost.

1 is a schematic configuration diagram of a power generation system using fluid circulation according to the present invention;
2 is a block diagram of a power generation system using fluid circulation according to the present invention;
3 is a configuration diagram of a first generator applied to a power generation system using fluid circulation according to the present invention;
4 is a block diagram of a second generator applied to a power generation system using fluid circulation according to the present invention.

Next, a preferred embodiment of the power generation system using the fluid circulation according to the present invention will be described in detail with reference to the drawings.

Hereinafter, the same reference numerals are used for technical elements having the same function, and repeated detailed descriptions are omitted to avoid overlapping descriptions.

In addition, the examples described below are illustratively shown in order to effectively show the preferred embodiments of the present invention, and should not be construed to limit the scope of the present invention.

The present invention relates to a power generation system using fluid circulation, and more particularly, by pumping a fluid (water) stored in a water tank to a certain height and using the height energy generated by dropping the pumped fluid to produce electrical energy, It relates to a power generation system using fluid circulation that can reuse the fluid.

1 is a schematic configuration diagram of a power generation system using fluid circulation according to the present invention.

1, the configuration of the power generation system using fluid circulation according to the present invention is largely composed of a water tank 10, a pumping pump 20, a suction pipe 30, a discharge pipe 40, and a power generation device 50. consists of including.

The water tank 10 has a predetermined shape, and a fluid is stored therein.

Although FIG. 1 shows that the upper part of the water tank 10 is open, it may be closed with a cover to prevent the inflow of foreign substances, etc. and to prevent safety accidents such as drowning.

The pump 20 performs a function of pumping the fluid (or water, hereinafter referred to as 'fluid') stored in the water tank 10 using electric energy, and may be configured as a general pump.

The suction pipe 30 is disposed between the water tank 10 and the pumping pump 20 , and one side is immersed in the fluid stored in the water tank 10 , and the other side is connected to the suction part of the pump 20 . do.

The discharge pipe 40 includes a discharge upper pipe 41 and a discharge lower pipe 42 .

The discharge pipe 41 raises the fluid discharged from the discharge part of the pump 20 to a certain height, and the discharge lower pipe 42 extends to the discharge pipe 41 and is transferred to the discharge pipe 41 The fluid is led into the water tank (10).

The power generation device 50 is installed on the flow path of the discharge lower pipe 42 , and uses the height energy of the fluid falling through the discharge lower pipe 42 to produce electrical energy.

In other words, the fluid stored in the water tank 10 is sucked into the suction pipe 30 by the pump 20 and rises to a predetermined height through the discharge pipe 40 . As the elevated fluid falls through the discharge pipe 40 disposed downward, the power generation device 50 installed in the discharge pipe 40 is driven, and electric energy is produced by driving the power generation device 50 .

In addition, the fluid used for driving the power generation device 50 is introduced into the water tank 10 .

The electric energy produced by the generator 50 is used to drive the pump 20, and the surplus electric energy (power) is transmitted to the outside to supply electric power.

In the above configuration, the electric energy required for the initial driving of the pump 20 uses renewable energy such as wind power generation or solar power generation, or electric energy stored in a battery in advance, or electricity produced by a power generation device using fossil fuels. Energy can be used.

When the pump 20 is driven in a state where there is no fluid in the suction pipe 30 and the discharge pipe 40, the pump 20 absorbs and pumps the fluid in the water tank 10. will consume

However, when the fluid discharged by the driving of the pump 20 is transferred to the discharge lower pipe 42 through the discharge upper pipe 41, the fluid induced in the discharge lower pipe 42 falls by gravity, and the fluid A vacuum force is generated due to the fall of the , and an effect of pulling the fluid discharged from the pump 20 is generated. That is, according to the principle of the siphon, the fluid falling from the discharge lower pipe 42 attracts the fluid of the suction pipe 41 and the discharge pipe 41 .

In detail, at the time of initial operation, the pumping device 20 must bear the burden from the height of the fluid stored in the water tank 10 to the first height h1 of the suction pipe 30 and the discharge pipe 41 . Thereafter, when the pumped fluid is transferred to the discharge lower pipe 42 and discharged through the discharge lower pipe 42, the pump is discharged from the pump 20 due to the siphon principle by the fluid falling into the discharge lower pipe 42 attracts the fluid. In this state, the pumping height to be borne by the pumping pump 20 is a third height ( h3) only.

However, considering the loss due to the driving of the pump 20, the friction between the fluid and the inside of the pipe while passing through the suction pipe 30 and the discharge pipe 40, the pumping height that the pump 20 must bear is the third It may be relatively higher than the height h3.

Even so, when the principle of the siphon is operated by the fluid falling into the discharge lower pipe 42, the pumping height borne by the pumping pump 20 is relatively lower than the first height h1, and the corresponding The load on the pump 20 is reduced.

2 is a block diagram of a power generation system using fluid circulation according to the present invention.

2, the power generation system using fluid circulation according to the present invention is a water tank 10, a pumping pump 20, a suction pipe 30, a discharge pipe 40, a power generation device 50, and a rainwater storage tank ( 60) is included.

Although each configuration will be described, a description of a portion overlapping with the description of FIG. 1 will be omitted.

The fluid discharged from the discharge lower pipe 42 of the discharge pipe 40 may fall into the water tank 10 to generate air (bubbles) in the fluid. When the bubbles generated inside the fluid flow into the suction pipe 30 , the pumping capacity of the pumping pump 20 is reduced.

Accordingly, the water tank 10 has a multi-stage baffle 11 that divides the suction part 10a in which the suction pipe 30 is immersed in the fluid and the drop part 10b in which the fluid discharged from the discharge lower pipe 42 falls. can be installed.

The multi-stage baffle 11 stabilizes the flow of the fluid dropped to the falling part 10b and prevents air bubbles from flowing into the suction pipe 30 , and is relatively higher than the height of the fluid stored in the water tank 10 . The first baffle 11a is formed high and is exposed to the upper part of the fluid and has an opening through which the fluid moves, and is formed relatively lower than the height of the fluid stored in the water tank 10 so that the upper part is immersed in the fluid, so that the upper part is immersed in the fluid. It is configured to include a second baffle (11b) to which the fluid is moved to the side.

In addition, various foreign substances may be introduced into the water tank 10 .

The fluid containing foreign substances reduces the pumping ability of the pumping pump 20 .

Accordingly, in order to filter foreign substances contained in the fluid, a screen 12 for filtering foreign substances contained in the fluid is installed in the opening of the multi-stage baffle 11 .

That is, the screen 12 may be installed in the opening of the first baffle 11a or above the second baffle 11b, and the opening of the first baffle 11a and the second baffle 11b ) can be installed on the upper part of both.

The discharge pipe 40 is a discharge pipe 41 through which the fluid discharged from the pump 20 rises to a predetermined height, and a discharge pipe extending to the discharge pipe 41 to guide the fluid into the water tank 10 ( 42), but may further include a horizontal flow path pipe 43 connecting between the discharge upper pipe 41 and the discharge lower pipe 42 .

The power generation device 50 is discharged from the end of the first generator 51 and the discharge lower pipe 42 for generating electrical energy using the height energy generated by the transfer of the fluid falling to the discharge lower pipe 42 . It may be configured to include a second generator 52 for producing electrical energy by using the falling of the fluid.

3 is a schematic configuration diagram of a first generator applied to a power generation system using fluid circulation according to the present invention.

3, the first generator 51 is a propeller (propeller) water wheel (51a) installed inside the discharge lower pipe (42) and a shaft (51b) for transmitting the rotation of the propeller water wheel (51a) And it is configured to include a power generation module (51c) for producing electric energy by using the rotation of the shaft (51b).

In the above configuration, the discharge lower pipe 42 is configured to be bent at a predetermined angle.

In addition, the shaft 51b is installed through the bent portion of the lower discharge pipe 42 and is configured to be rotatable, but is sealed to prevent leakage.

According to the above configuration, in the first generator 51, the fluid falling through the discharge lower pipe 42 rotates the propeller aberration 51a, and uses the propeller aberration 51a to produce electric energy. do.

4 is a schematic configuration diagram of a second generator applied to a power generation system using fluid circulation according to the present invention.

Referring to FIG. 4 attached, the second generator 52 produces electrical energy by using a pelton aberration 52a installed at the end of the discharge lower pipe 42 .

On the other hand, if the discharge lower pipe 42 is filled with a fluid, it is possible to reduce the power required when the pump 20 is initially driven.

In addition, in the power generation system of the present invention, the loss of fluid may be minimized by circulating the fluid in the water tank 10 , but the fluid stored in the water tank 10 may be reduced by evaporation of the fluid.

Accordingly, in order to reduce the electric power required for the initial operation of the pump 20 and to maintain a constant level of the fluid stored in the water tank 10 or to compensate for the loss, the fluid must be supplied.

In the present invention, rainwater may be used to fill the fluid in the discharge lower pipe 42 or to supplement the lost fluid.

The rainwater storage tank 60 is for storing rainwater and supplying a fluid to the inside of the water tank 10 or the discharge lower pipe 42 as necessary.

At this time, the rainwater storage tank 60 is a rainwater supply pipe 61 for supplying the stored rainwater fluid to the discharge lower pipe 42, branching from the rainwater supply pipe 61 to supply rainwater to the tank 10 It includes a fluid replenishment passage pipe (62). In addition, a supplemental fluid control valve (60a) for intermittent control of the flow path of the rainwater supply pipe (61) is further installed.

In the above, when the fluid is filled in the discharge lower pipe 42 during the initial (initial) operation of the pumping pump 20, the discharge lower pipe 42 is provided to prevent the fluid supplied from the rainwater storage tank 60 from being discharged. A fluid discharge control valve (42a) for intermittently discharging the fluid is installed, and the horizontal flow path pipe (43) between the discharge upper pipe (41) and the discharge lower pipe (42) is connected to the fluid supplied from the rainwater supply pipe (61). An air discharge valve (43a) for discharging the internal air is installed.

Accordingly, when the supplementary fluid control valve 60a is opened in the closed state and the air discharge valve 43a in the closed state, the fluid stored in the rainwater storage tank 60 is discharged. It is introduced into the upper tube 41 and the discharge lower pipe 42 .

When the pump 20 is driven while closing the air discharge valve 43a and opening the fluid discharge control valve 42a in a state where the discharge upper pipe 41 and the discharge lower pipe 42 are filled with fluid , it is possible to reduce the power required for the initial driving of the pump 20 .

In addition, the fluid stored in the rainwater storage tank 60 is supplied to the water tank 10 through the fluid replenishment passage pipe 62 in order to keep the water level at which the fluid of the water tank 10 is stored constant or to compensate for the loss. is composed

At this time, a control valve (not shown in the drawing) for intermitting the flow path may be configured in the fluid replenishment flow path pipe 62 , and the control valve includes a water level sensor (not shown in the drawing) for detecting the fluid level in the water tank 10 and It may be configured to be driven in association.

According to the present invention, the principle of the siphon is applied by the flow of the fluid that is guided downward and passes through the discharge lower pipe, so that the load on the pump is reduced, and as the load on the pump is reduced, the power applied to the pump is reduced. Thus, there is an advantage in that the power generated by the power generation device installed in the discharge pipe can produce surplus power, excluding the power required to drive the pumping pump.

In addition, the power generation system using fluid circulation according to the present invention can be applied to not only pico hydropower (5KW or less) but also mini hydropower (100KW ~ 1,000KW), so that even in areas where supply from KEPCO is alienated There are advantages to using it.

In addition, since the loss of the fluid is reduced through the recirculation of the fluid, the cost associated with the operation can be minimized, and thus there is an advantage in that electricity can be produced at low cost.

In the above, a preferred embodiment of a power generation system using fluid circulation according to the present invention has been described, but the present invention is not limited thereto, and various modifications are made within the scope of the claims and the description of the invention and the accompanying drawings. It is possible, and this is also within the scope of the present invention.

10: Tank 11: Multi-stage baffles
12: screen 20: pumping water
30: suction pipe 40: exhaust pipe
41: discharge tube 42: discharge lower tube
50: generator 51: first generator
52: second generator 60: rainwater storage tank

Claims (5)

a water tank 10 in which the fluid is stored;
a pumping water pump 20 for pumping the fluid stored in the water tank 10;
a suction pipe 30 disposed between the pump 20 and the water tank 10 to suck the fluid in the water tank 10 by driving the pump 20 and transport it;
A discharge pipe including a discharge pipe 41 through which the fluid discharged from the pump 20 rises to a predetermined height, and a discharge pipe 42 extending to the discharge pipe 41 to guide the fluid into the water tank 10 . (40); and
a power generation device (50) installed on the flow path of the discharge lower pipe (42) and generating electrical energy using the height energy of the discharged fluid;
Power generation system using fluid circulation, characterized in that it comprises a.
The method according to claim 1,
Rainwater storage tank 60 that stores rainwater and includes a rainwater supply pipe 61 for supplying the stored rainwater to the discharge lower pipe 42;
Consists of further comprising,
The fluid stored in the rainwater storage tank (60) is a power generation system using fluid circulation, characterized in that the loss of the fluid in the tank (10) or supplied to the discharge lower pipe (42).
The method according to claim 1,
The water tank 10,
Fluid circulation, characterized in that the multi-stage baffle (11) dividing the suction part (10a) in which the suction pipe (30) is submerged in the fluid and the falling part (10b) from which the fluid discharged from the discharge lower pipe (42) falls is installed. power generation system using
The method of claim 3 .
A power generation system using fluid circulation, characterized in that the multi-stage baffle (11) is provided with a screen (12) for filtering foreign substances contained in the fluid.
The method according to claim 1,
The power generation device 50,
a first generator 51 for producing electric energy using a propeller aberration installed inside the discharge lower pipe 42; and
a second generator 52 for producing electrical energy using a pelton aberration installed at the end of the discharge lower pipe 42;
Power generation system using fluid circulation, characterized in that it comprises a.

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