KR102569574B1 - Temperature difference power generation system using solar collected heat - Google Patents

Abstract

A temperature difference power generation system using solar heat collection is disclosed. The disclosed temperature difference power generation system using solar collected heat is a photovoltaic power generation and heat collection unit configured to convert solar light energy into electrical energy and thermal energy, a hot water storage unit configured to store hot water obtained by recovering the thermal energy, and the hot water By exchanging heat between the first hot water discharged from the storage unit and the 1-1 working fluid, the first hot water is cooled and converted into the second hot water, and the 1-1 working fluid is heated to convert it into the 1-2 working fluid. A first heat exchanger configured to do so, and a steam power generation unit configured to generate electricity using the 1-2 working fluid discharged from the first heat exchanger, wherein the first-2 discharged from the first heat exchanger 2 working fluid is configured to pass through the steam power generation unit and be converted into 1-3 working fluids.

Description

Temperature difference power generation system using solar collected heat}

A temperature difference power generation system using solar heat collection is disclosed. More specifically, a temperature difference power generation system using solar heat collection that can generate power itself and utilize it as renewable energy is disclosed.

Currently, a system that obliges power generation companies to supply a certain percentage of total power generation as new and renewable energy according to the new and renewable energy supply expansion policy, that is, the 'Renewable Portfolio Standard (RPS)' is being implemented. Accordingly, the target companies selected as power generation operators with a power generation facility capacity of 500MW or more must supply 2% of power generation annually as a new and renewable energy source. It is currently necessary to purchase a certificate (REC-generation amount) to meet the mandatory quota.

Therefore, research on power generation systems using renewable energy, such as solar or wind power, is being conducted. Research on how to use it is ongoing.

For example, Korean Patent Registration No. 10-0776353 discloses that when surplus power greater than the demand is generated among renewable energy such as solar cells and wind power generation facilities, hydrogen is produced and stored using a water electrolysis device, and the amount of power generated is reduced. In this case, an energy self-sufficient system using hydrogen energy capable of generating and supplying power from a fuel cell using stored hydrogen is disclosed. However, the energy self-sufficient system utilizes only surplus electrical energy, and the fuel cell used is a low-temperature fuel cell operating at 60 to 70°C.

On the other hand, surplus heat may be generated in various industrial facilities, and surplus heat is generated using various wastes discharged from industrial sites and living sites. A technology to utilize it as a heat source is being developed, but its utilization is limited. .

One embodiment of the present invention provides a temperature difference power generation system using solar heat collection that can self-generate power and utilize it as renewable energy.

One aspect of the present invention,

a photovoltaic power generation and heat collection unit configured to convert sunlight energy into electrical energy and thermal energy;

a hot water storage unit configured to store hot water obtained by recovering the thermal energy;

By exchanging heat between the first hot water discharged from the hot water storage unit and the 1-1 working fluid, the first hot water is cooled and converted into second hot water, and the 1-1 working fluid is heated to obtain the 1-2 working fluid. a first heat exchanger configured to convert; and

And a steam power generation unit configured to generate electricity using the 1-2 working fluid discharged from the first heat exchanger,

The 1-2 working fluid discharged from the first heat exchanger provides a temperature difference power generation system using solar light collection heat configured to pass through the steam power generation unit and be converted to the 1-3 working fluid.

The photovoltaic power generation and heat collection unit includes a photovoltaic power generation and heat collection panel, an inverter configured to convert DC electricity generated by the photovoltaic power generation and heat collection panel into alternating current electricity, and the photovoltaic power generation and heat collection panel. It may include a heat exchanger configured to recover the generated heat as hot water.

The temperature difference power generation system using the sunlight collection heat may further include a preheater between the photovoltaic power generation and heat collection unit and the hot water storage unit.

The temperature difference power generation system using the sunlight collection heat exchanges heat between the 1-3 working fluids discharged from the steam power generation unit and a separate second working fluid, thereby evaporating the second working fluid and supplying it to the first heat exchanger. It may further include an evaporation unit configured to convert the 1-1 working fluid into the 1-1 working fluid, and the 1-3 working fluid passes through the evaporation unit and is configured to be converted into the 1-4 working fluid.

The temperature difference power generation system using the photovoltaic collection heat is configured to pressurize and heat the 1-4 working fluids by compressing the 1-4 working fluids discharged from the evaporation unit to convert them into the 1-5 working fluids. A compression unit may be further included.

The temperature difference power generation system using the sunlight collection heat heats the second hot water by exchanging heat with the second hot water discharged from the first heat exchanger for the first to fifth working fluids discharged from the compression unit, thereby heating the third hot water. It may further include a second heat exchanger configured to convert the 1-5 working fluids into 1-6 working fluids by cooling them.

The temperature difference power generation system using the sunlight collection heat heats the third hot water by exchanging heat with the third hot water discharged from the second heat exchanger for the first to sixth working fluids discharged from the second heat exchanger, 4 may further include a third heat exchanger configured to convert hot water into hot water and cool the first to sixth working fluids to convert them into first to seventh working fluids.

The temperature difference power generation system using the sunlight collection heat heats the fourth hot water by exchanging heat with the fourth hot water discharged from the third heat exchanger for the working fluids 1-7 discharged from the third heat exchanger to generate electricity. 5 may further include a fourth heat exchanger configured to convert hot water into hot water and cool the first to seventh working fluids to convert them into first to eighth working fluids.

The temperature difference generation system using the sunlight collection heat may be configured such that the fifth hot water discharged from the fourth heat exchanger is re-supplied to the hot water storage unit.

The temperature difference power generation system using the photovoltaic collection heat includes a condensation unit configured to condense the 1-8 working fluids discharged from the fourth heat exchanger by exchanging heat with the 3rd working fluid to convert them into 1-9 working fluids. can include more.

The temperature difference power generation system using the sunlight collection heat may further include an expansion unit configured to expand the first to ninth working fluids discharged from the condensation unit and convert them into the second working fluid supplied to the evaporation unit. there is.

The third working fluid supplied to the condensation unit may be maintained at a lower temperature than the first to eighth working fluids supplied to the condensation unit by geothermal heat.

The temperature difference power generation system using the sunlight collection heat may further include a working fluid transfer line configured to raise the third working fluid from the ground to the ground, pass the condensing unit, and then send the third working fluid down to the ground.

The working fluid transfer line may include a thermal insulation part positioned above and above the ground and a heat conduction part positioned below the ground.

The hot water stored in the hot water storage unit may be maintained at a temperature of 70 to 80°C, and the heat conducting portion of the working fluid transfer line may be maintained at a temperature of 15 to 17°C.

In the temperature difference power generation system using the photovoltaic collection heat, the steam power generation unit may include a turbine and an alternator connected thereto.

The temperature difference power generation system using the sunlight collection heat may further include an energy storage unit configured to store electricity generated by the steam power generation unit.

The temperature difference power generation system using the photovoltaic collection heat may be configured to use electricity generated by the steam power generation unit alone or together with external power as input power of the photovoltaic power generation and heat collection unit.

At least one of the 1-1 working fluid to the 1-9 working fluid, the second working fluid, and the third working fluid may include an HFC-based working fluid.

The temperature difference power generation system using solar heat collection according to an embodiment of the present invention can produce power itself and use it as new and renewable energy, thereby not only reducing power costs but also properly coping with the new and renewable energy mandatory quota system. can

1 is a diagram schematically showing a temperature difference power generation system using sunlight collection heat according to an embodiment of the present invention.

Hereinafter, a temperature difference power generation system using solar heat collection according to an embodiment of the present invention will be described in detail with reference to the drawings.

In the present specification, “upper” means a reverse direction of gravity, and “lower” means a direction of gravity.

Also, in this specification, "working fluid" is a fluid that operates a steam power generation unit, and means a liquid, a gas, a mixture of a liquid and a gas, or a combination thereof.

Also in this specification, "electricity" and "power" are used in the same meaning.

1 is a diagram schematically showing a temperature difference power generation system 100 using sunlight collection heat according to an embodiment of the present invention.

The temperature difference power generation system 100 using solar collected heat according to an embodiment of the present invention includes a photovoltaic power generation and heat collection unit 110, a hot water storage unit 120, a first heat exchanger HX1, and a steam power generation unit. (130).

The photovoltaic power generation and heat collection unit 110 may be configured to convert light energy from the sun into electrical energy and thermal energy.

The photovoltaic power generation and heat collection unit 110 may include a photovoltaic power generation and heat collection panel 111 , an inverter 112 and a heat exchanger 113 .

The photovoltaic power generation and heat collection panel 111 may be configured to generate electrical energy and thermal energy by absorbing light energy from the sun. For example, solar power and heat collection panel 111, although not specifically shown in FIG. It may have a configuration of a built-in heat exchanger/insulator.

The inverter 112 may be configured to convert DC electricity generated by the photovoltaic power generation and heat collection panel 111 into AC electricity. The outflow power (PW) generated by the inverter 112 may be stored in an energy storage unit (not shown) such as a battery.

The heat exchanger 113 may be configured to recover heat generated by the photovoltaic power generation and heat collection panel 111 as hot water (HW).

Hereinafter, referring to FIG. 1 , an operating mechanism of the photovoltaic power generation and heat collection unit 110 will be described in detail.

First, the photovoltaic power generation and heat collection panel 111 may absorb light energy from the sun and receive a heat medium (not shown) from the outside. The absorbed light energy may be converted into electricity and heat in the photovoltaic power generation and heat collection panel 111 .

Next, the generated electricity may be converted into AC electricity through the inverter 112 as DC electricity. In addition, the generated heat is sequentially passed through the heat medium transfer line L11, the heat medium transfer line L13, the heat medium transfer line L14, the pump P1 and the heat medium transfer line L15 by the action of the three-way valve V. circulated to the photovoltaic power generation and heat collection panel 111 (this is a bypass operation performed when the temperature of the heat medium is less than a certain level), the heat medium transfer line (L11), the heat medium transfer line (L12), the heat exchanger ( 113), the heat medium transfer line (L14), the pump (P1), and the heat medium transfer line (L15) may be circulated to the photovoltaic power generation and heat collection panel 111 in turn (this is when the temperature of the heat medium is above a certain level). normal operation conducted). At this time, cold water (CW) is supplied from the outside to the heat exchanger 113, and the cold water (CW) can be converted into hot water (HW) by exchanging heat with the heat medium flowing inside the heat medium transfer line (L12).

The heating medium may be gas or liquid. As an example, the heating medium may be air. As another example, the heat medium may be water or antifreeze.

Next, the hot water HW discharged from the heat exchanger may be supplied to the hot water storage unit 120 through the pump P2.

In addition, the temperature difference power generation system 100 using sunlight collection heat may further include a preheater (not shown) between the photovoltaic power generation and heat collection unit 110 and the hot water storage unit 120 . Specifically, the preheater additionally heats the hot water (HW) when the temperature of the hot water (HW) generated by the photovoltaic power generation and heat collection unit 110 is lower than the reference temperature (eg, 70 to 80 ° C). It serves to raise the temperature to the reference temperature.

The hot water storage unit 120 may be configured to store hot water (HW).

In addition, the amount of hot water (HW) stored in the hot water storage unit 120 may be increased as desired.

In addition, as the amount of hot water (HW) stored in the hot water storage unit 120 increases, the amount of electricity produced by the steam power generation unit 130 described below may also increase. Therefore, by increasing the amount of hot water (HW) stored in the hot water storage unit 120 as desired, the amount of electricity produced by the steam power generation unit 130 may also be increased as desired.

In addition, a portion of the hot water HW stored in the hot water storage unit 120 (ie, the first hot water) serves to heat the 1-1 working fluid through the first heat exchanger HX1 as will be described later. In addition, some of the hot water (HW) can be used as domestic hot water or hot water for heating.

In addition, the hot water (HW) stored in the hot water storage unit 120 may be maintained at a temperature of 70 to 80 °C.

The first heat exchanger (HX1) is operated by discharging the first hot water discharged from the hot water storage unit 120 and supplied to the first heat exchanger (HX1) through the hot water transfer line (L21) and discharged from the evaporation unit 140 to be described later. By exchanging heat with the 1-1 working fluid supplied to the 1-1 heat exchanger HX1 through the fluid transfer line (L31), the 1-1 hot water is cooled and converted into 2-nd hot water, and the 1-1 working fluid is heated. It may be configured to convert to the 1-2 working fluid.

The steam power generation unit 130 is configured to generate electricity by using the first-second working fluid discharged from the first heat exchanger HX1 and supplied to the steam power generation unit 130 through the working fluid transfer line L32. It can be.

In addition, in the temperature difference power generation system 100 using sunlight collection heat, the 1-2 working fluid transferred along the working fluid transfer line L32 passes through the steam power generation unit 130 to the 1-3 working fluid. After conversion, it may be configured to be supplied to the evaporation unit 140 to be described later along the working fluid transfer line (L33).

As such, electricity generated by the steam power generation unit 130 mainly uses hot water (HW) and geothermal heat, and thus corresponds to renewable energy because it does not use fossil fuel or nuclear power.

Specifically, the steam power generation unit 130 may include a turbine (not shown) and an alternator (not shown) connected thereto.

In addition, the temperature difference power generation system 100 using solar heat collection may further include an evaporation unit 140 .

The evaporation unit 140 is discharged from the steam power generation unit 130 and the 1-3 working fluid supplied to the evaporation unit 140 through the working fluid transfer line L33 and the expansion unit 170 to be described later are discharged By heat-exchanging the second working fluid supplied to the evaporation unit 140 through the working fluid transfer line (L40), the second working fluid is evaporated and passed through the working fluid transfer line (L31) to the first heat exchanger (HX1) It may be configured to be converted into the 1-1 working fluid supplied to.

In addition, in the temperature difference power generation system 100 using sunlight collection heat, the 1-3 working fluid discharged from the steam power generation unit 130 and supplied to the evaporation unit 140 through the working fluid transfer line L33 evaporates. After passing through the unit 140, it may be configured to be converted into the first to fourth working fluids supplied to the compression unit 150 to be described later through the working fluid transfer line L34.

In addition, the temperature difference power generation system 100 using sunlight collection heat pumps the 1-1 working fluid discharged from the evaporation unit 140 to the first heat exchanger HX1 through the working fluid transfer line L31. It may further include a configured pump (not shown).

In addition, the temperature difference power generation system 100 using sunlight collection heat is configured to pump the 1-3 working fluid discharged from the steam power generation unit 130 to the evaporation unit 140 through the working fluid transfer line L33. A pump (not shown) may be further included.

The 1-1 working fluid to the 1-3 working fluid, the 1-4 working fluid to 1-9 working fluids described later, and the second working fluid may be of the same material. In this case, the first The -1 working fluid to the first to ninth working fluids may each be a gas, and the second working fluid may be a liquid. Accordingly, each of the 1-1 working fluid to the 1-9 working fluid may have a higher temperature than that of the second working fluid.

In addition, the temperature difference power generation system 100 using solar heat collection may further include a compression unit 150 .

The compression unit 150 pressurizes the 1-4 working fluids by compressing the 1-4 working fluids discharged from the evaporation unit 140 and supplied to the compression unit 150 through the working fluid transfer line L24. And it may be configured to be heated and converted into the first to fifth working fluids supplied to the second heat exchanger (HX2) to be described later through the working fluid transfer line (L35). That is, the first-fourth working fluid discharged from the evaporation unit 140 may be compressed in the compression unit 150 and converted into a high-temperature and high-pressure gas, the first-fifth working fluid.

In addition, the temperature difference power generation system 100 using solar collected heat reheats the hot water (HW) stored in the hot water storage unit 120 by heat exchange with the first to fifth working fluids discharged from the compression unit 150. can be configured. Accordingly, the hot water (HW) stored in the hot water storage unit 120 is discharged from the evaporation unit 140 and supplied to the first heat exchanger HX1 through the working fluid transfer line L31 in the low-temperature 1-1 operation. Heat lost to the fluid may be supplemented by the high-temperature working fluids 1-5 discharged from the compression unit 150 . This will be described in more detail below.

Specifically, the temperature difference power generation system 100 using solar heat collection may further include a second heat exchanger HX2.

The second heat exchanger (HX2) transfers the first to fifth working fluids discharged from the compression unit 150 and supplied to the second heat exchanger (HX2) through the working fluid transfer line (L35) to the first heat exchanger (HX1). The second hot water is heated and converted into third hot water by exchanging heat with the second hot water discharged from the hot water transfer line (L22) supplied to the second heat exchanger (HX2), and the 1-5 working fluid is It may be configured to be cooled and converted into the first to sixth working fluids.

The third hot water discharged from the second heat exchanger HX2 passes through hot water transfer lines L23, L24, and L25 to a third heat exchanger HX3, a fourth heat exchanger HX4, and a hot water storage unit 120. ) can be supplied sequentially. However, the present invention is not limited thereto. As an example, the fourth heat exchanger (HX4) may be omitted. In this case, the third hot water discharged from the second heat exchanger (HX2) passes through the hot water transfer line (L23, L24 = L25) to the third heat exchanger ( HX3) and the hot water storage unit 120 may be sequentially supplied. As another example, both the third heat exchanger (HX3) and the fourth heat exchanger (HX4) may be omitted. In this case, the third hot water discharged from the second heat exchanger (HX2) is supplied to the hot water transfer line (L23=L24). =L25) may be directly supplied to the hot water storage unit 120.

In addition, the first to sixth working fluids discharged from the second heat exchanger (HX2) are condensed through the third heat exchanger (HX3), the fourth heat exchanger (HX4) and condensed through the working fluid transfer lines (L36, L37, L38). may be supplied in turn to unit 160 . However, the present invention is not limited thereto. As an example, the fourth heat exchanger (HX4) may be omitted. In this case, the first to sixth working fluids discharged from the second heat exchanger (HX2) are removed through the working fluid transfer lines (L36, L37=L38). It may be supplied sequentially to the 3 heat exchanger (HX3) and the condensation unit (160). As another example, both the third heat exchanger (HX3) and the fourth heat exchanger (HX4) may be omitted, and in this case, the 1-6 working fluids discharged from the second heat exchanger (HX2) are transferred to the working fluid transfer line. It can be directly supplied to the condensation unit 160 through (L36 = L37 = L38).

In addition, the temperature difference power generation system 100 using solar heat collection may further include a third heat exchanger HX3.

The third heat exchanger (HX3) transfers the 1-6 working fluids discharged from the second heat exchanger (HX2) and supplied to the third heat exchanger (HX3) through the working fluid transfer line (L36) to the second heat exchanger ( The third hot water is heated and converted into fourth hot water by exchanging heat with the third hot water discharged from HX2 and supplied to the third heat exchanger HX3 through the hot water transfer line L23, and the first to sixth operations It may be configured to cool the fluid and convert it to the 1-7 working fluids.

The fourth hot water discharged from the third heat exchanger HX3 may be sequentially supplied to the fourth heat exchanger HX4 and the hot water storage unit 120 through hot water transfer lines L24 and L25. However, the present invention is not limited thereto. For example, the fourth heat exchanger (HX4) may be omitted. In this case, the fourth hot water discharged from the third heat exchanger (HX3) passes through the hot water transfer line (L24=L25) to the hot water storage unit 120. can be supplied directly.

In addition, the first to seventh working fluids discharged from the third heat exchanger HX3 may be sequentially supplied to the fourth heat exchanger HX4 and the condensation unit 160 through the working fluid transfer lines L37 and L38. . However, the present invention is not limited thereto. For example, the fourth heat exchanger (HX4) may be omitted. In this case, the working fluids 1-7 discharged from the third heat exchanger (HX3) pass through the working fluid transfer line (L37=L38) to the condensation unit. It can be fed directly to (160).

In addition, the temperature difference power generation system 100 using solar heat collection may further include a fourth heat exchanger HX4.

The fourth heat exchanger (HX4) transfers the 1-7 working fluid discharged from the third heat exchanger (HX3) and supplied to the fourth heat exchanger (HX4) through the working fluid transfer line (L37) to the third heat exchanger ( The fourth hot water is heated and converted into fifth hot water by exchanging heat with the fourth hot water discharged from HX3 and supplied to the fourth heat exchanger HX4 through the hot water transfer line L24, and the operation 1-7 It may be configured to cool the fluid and convert it to 1-8 working fluids.

The fourth hot water discharged from the fourth heat exchanger HX4 may be re-supplied to the hot water storage unit 120 through the hot water transfer line L25.

In addition, the first to eighth working fluids discharged from the fourth heat exchanger HX4 may be supplied to a condensing unit 160 to be described later through a working fluid transfer line L38.

In addition, the temperature difference power generation system 100 using solar heat collection may further include a condensation unit 160 .

The condensing unit 160 operates by raising the 1-8 working fluids discharged from the fourth heat exchanger HX4 and supplied to the condensing unit 160 through the working fluid transfer line L38 from the ground ER to the ground. It may be configured to be condensed by heat exchange with the third working fluid supplied to the condensing unit 160 through the fluid transfer line (L41) and converted into first to ninth working fluids.

In addition, the temperature difference power generation system 100 using solar heat collection may further include an expansion unit 170 .

The expansion unit 170 expands the first to ninth working fluids discharged from the condensing unit 160 and supplied to the expansion unit 170 through the working fluid transfer line L39, thereby forming the working fluid transfer line L40. It may be configured to be converted into the second working fluid supplied to the evaporation unit 140 through.

The second working fluid discharged from the expansion unit 170 and then supplied to the evaporation unit 140 has a lower temperature than the first to ninth working fluids supplied to the expansion unit 170 after being discharged from the condensation unit 160. can have

For example, expansion unit 170 may be an expansion valve.

The third working fluid supplied to the condensing unit 160 may be maintained at a lower temperature than the first to eighth working fluids supplied to the condensing unit 160 by geothermal heat.

In addition, the temperature difference power generation system 100 using solar heat collection uses a pump P3 configured to pump the third working fluid from the ground ER to the condensing unit 160 through the working fluid transfer line L41 to the ground. can include more.

In addition, the temperature difference power generation system 100 using sunlight collection heat may further include a working fluid transfer line L42 in addition to the working fluid transfer line L41.

The working fluid transfer lines (L41, L42) may be configured to raise the third working fluid from the ground (ER) to the ground, pass through the condensation unit 160, and then send it down to the ground (ER) again.

In addition, the working fluid transfer lines L41 and L42 may include a heat insulating part IS and a heat conducting part CD.

Insulation (IS) may be located above the ground (ER) and above the ground. For example, the heat insulation unit (IS) may be installed in all parts of the working fluid transfer lines (L41, L42) where the temperature of the surrounding ground (ER) exceeds 17 ° C. and on the ground.

The heat conduction unit (CD) may be located below the ground (ER). For example, the heat conduction unit (CD) may be installed in a part where the temperature of the surrounding ground (ER) is 17 ° C or less among the working fluid transfer lines (L41, L42). Therefore, the heat conductive part CD may be maintained at a temperature of 15 to 17°C.

The third working fluid flowing inside the working fluid transfer lines L41 and L42 is cooled by heat exchange with cold geothermal heat in the heat conduction unit CD, and then passed through the insulation unit IS to be supplied to the condensation unit 160. . At this time, the third working fluid may be supplied to the condensation unit 160 as it is cooled in the heat conduction unit (CD) without being heated again by the surrounding ground (ER) and air due to the existence of the insulation unit (IS). .

In addition, the temperature difference power generation system 100 using solar heat collection may further include an energy storage unit 180 .

The energy storage unit 180 may be configured to store electricity produced by the steam power generation unit 130 .

Also, the energy storage unit 180 may be omitted, and in this case, the energy storage unit 180 may be configured to transmit (transmit) electricity generated in the steam power generation unit 130 to the outside.

In addition, the temperature difference power generation system 100 using solar collected heat uses electricity (that is, renewable energy) produced by the steam power generation unit 130 alone or with external power (fossil fuel and/or nuclear power-based energy). Together, they may be configured to be used as input power of the photovoltaic power generation and heat collection unit 110 (eg, operation power of the pumps P1 and P2, the three-way valve V and/or the preheater).

At least one of the 1-1 working fluid to the 1-9 working fluid, the second working fluid, and the third working fluid may include an HFC-based working fluid. For example, at least one of the 1-1 working fluid to the 1-9 working fluid, the second working fluid, and the third working fluid may be R32, but the present invention is not limited thereto.

Preferred embodiments according to the present invention have been described with reference to the drawings above, but this is only exemplary, and those skilled in the art can understand that various modifications and equivalent other embodiments are possible therefrom. There will be. Therefore, the scope of protection of the present invention should be defined by the appended claims.

100: Temperature difference power generation system using solar heat collection
110: solar power generation and heat collection unit 111: solar power generation and heat collection panel
112: inverter 113: heat exchanger
120: hot water storage unit 130: steam power generation unit
140: evaporation unit 150: compression unit
160: condensation unit 170: expansion unit
180: energy storage unit L11 to L14: heat medium transfer line
P1~P3: Pump HX1~HX4: Heat exchanger
L21~L25: hot water transfer line IS: insulation
CD: heat conductor ER: underground
L31~L40, L41, L42: Working fluid transfer line

Claims (19)

a photovoltaic power generation and heat collection unit configured to convert sunlight energy into electrical energy and thermal energy;
a hot water storage unit configured to store hot water obtained by recovering the thermal energy;
By exchanging heat between the first hot water discharged from the hot water storage unit and the 1-1 working fluid, the first hot water is cooled and converted into second hot water, and the 1-1 working fluid is heated to obtain the 1-2 working fluid. a first heat exchanger configured to convert; and
And a steam power generation unit configured to generate electricity using the 1-2 working fluid discharged from the first heat exchanger,
The 1-2 working fluid discharged from the first heat exchanger is configured to pass through the steam power generation unit and be converted into the 1-3 working fluid,
By heat-exchanging the 1-3 working fluid and the second working fluid discharged from the steam power generation unit, the second working fluid is evaporated and converted into the 1-1 working fluid supplied to the first heat exchanger. Further comprising an evaporation unit configured, wherein the 1-3 working fluid passes through the evaporation unit and is configured to be converted into a 1-4 working fluid,
Further comprising a compression unit configured to pressurize and heat the 1-4 working fluid by compressing the 1-4 working fluid discharged from the evaporation unit to convert it into a 1-5 working fluid,
The first to fifth working fluid discharged from the compression unit is heat-exchanged with the second hot water discharged from the first heat exchanger to heat the second hot water and convert it into third hot water, and the first to fifth working fluid Further comprising a second heat exchanger configured to cool and convert the first to sixth working fluids,
By exchanging heat with the third hot water discharged from the second heat exchanger, the first to sixth working fluid discharged from the second heat exchanger heats the third hot water and converts it into fourth hot water, and the first to sixth operation fluid is heated. Further comprising a third heat exchanger configured to cool the fluid and convert it to 1-7 working fluids;
The fourth hot water is heated and converted into fifth hot water by exchanging heat with the fourth hot water discharged from the third heat exchanger with the 1-7 working fluid discharged from the third heat exchanger, A temperature difference power generation system using solar light collection heat further comprising a fourth heat exchanger configured to cool the fluid and convert it to the first to eighth working fluids. According to claim 1,
The photovoltaic power generation and heat collection unit includes a photovoltaic power generation and heat collection panel, an inverter configured to convert DC electricity generated by the photovoltaic power generation and heat collection panel into alternating current electricity, and the photovoltaic power generation and heat collection panel. A temperature difference power generation system using solar collected heat including a heat exchanger configured to recover generated heat as hot water. According to claim 1,
A temperature difference power generation system using solar heat collection further comprising a preheater between the photovoltaic power generation and heat collection unit and the hot water storage unit. delete delete delete delete delete delete According to claim 1,
and a condensation unit configured to condense the first to eighth working fluids discharged from the fourth heat exchanger by exchanging heat with a third working fluid to convert them into first to ninth working fluids. system. According to claim 10,
The system further comprises an expansion unit configured to expand the first to ninth working fluids discharged from the condensation unit and convert them into the second working fluid supplied to the evaporation unit. According to claim 10,
The third working fluid supplied to the condensing unit is maintained at a lower temperature than the first to eighth working fluids supplied to the condensing unit by geothermal heat. According to claim 12,
The temperature difference power generation system using solar light collection heat further comprising a working fluid transfer line configured to raise the third working fluid from the ground to the ground, pass through the condensation unit, and then send the third working fluid down to the ground. According to claim 13,
The working fluid transfer line is a temperature difference power generation system using solar light collection heat including an insulation part located above and above the ground and a heat conduction part located below the ground. According to claim 14,
The hot water stored in the hot water storage unit is maintained at a temperature of 70 to 80 ° C, and the heat conducting part of the working fluid transfer line is maintained at a temperature of 15 to 17 ° C. According to claim 1,
The steam power generation unit is a temperature difference power generation system using solar heat collection comprising a turbine and an alternator connected thereto. According to claim 1,
A temperature difference power generation system using solar heat collection further comprising an energy storage unit configured to store electricity generated by the steam power generation unit. According to claim 1,
A temperature difference power generation system using solar heat collection configured to use the electricity generated by the steam power generation unit alone or together with external power as input power of the photovoltaic power generation and heat collection unit. According to claim 11,
At least one of the 1-1 working fluid to the 1-9 working fluid, the second working fluid, and the third working fluid includes a HFC-based working fluid.

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