KR20140079744A - Power generation system that combines a heat pump and heat engine - Google Patents

Abstract

The present invention relates to a system supplied with a driving power derived from heat energy of an external heat source. Disclosed is a heat engine system including a condenser capable of producing a driving power by driving a turbine through a first fluid vaporized by the heat source and cooling the first fluid flowing in from the turbine; and a pump for circulating the first fluid of a liquid type cooled in the condenser or the heat source through a heat engine passage selected from the turbine and the heat source. The disclosed heat pump system circulates a second fluid which is heat-exchanged with the first fluid of the heat engine system, and circulates the first fluid in the turbine by providing heat energy.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power generation system that combines a heat pump and a heat pump,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power system, and more particularly, to a power system capable of obtaining power by using an arrangement, a furnace, a boiler exhaust heat or a geothermal heat as a heat source, And a heat pump are combined to obtain power.

Thermal power generation, including nuclear power, uses the concept of the second law of thermodynamics, which is classical physics, to convert heat into heat by using the concept of " In contrast to the directivity of work, much heat energy that can not be converted into work is discharged into rivers, rivers, and seawater where the specific heat is high and the temperature change is not large. Therefore, the power generation efficiency is 35 to 45% ~ 50%, which is very low.

In contrast to the directionality of the conversion of heat and work here, it means that all the heat is not converted into heat in the process of converting from heat to heat, and in particular, the conversion rate to the heat is relatively low, Low.

In recent years, energy costs have risen due to energy depletion, and a number of technologies are being developed that can reduce or utilize energy. However, there has been a problem in that the waste heat of the external heat source has been used at an initial level in the recycling of the waste heat of the external heat source, or the waste heat is still abandoned because the efficiency is not high in the recycling process.

Therefore, a technology to utilize waste heat more efficiently and a device technology to make energy use efficiency very high is desired.

Korean Patent Application No. 2011-0142532 Korean Patent Application No. 2011-0142536 Korean Patent Application No. 2012-0092196

SUMMARY OF THE INVENTION The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide an air conditioner which is capable of accommodating waste heat derived from an external heat source but difficult to use in a heat exchanger connected to an external heat source, And the heat is transferred to the combined heat pump. The heat transfer is performed using a fluid, and the fluid is evaporated at a high temperature while passing through the evaporator and the condenser. The heat energy is again converted into thermal energy. So that it is possible to realize an energy device such as a small-sized power generation system.

In addition, the present invention relates to a heat pump for a high-temperature and high-pressure refrigerant, which comprises a heat pump and a heat pump combined with a fluid for evaporating at a high temperature in a heat pump so that a subcritical or supercritical high temperature is arranged in a plurality of arrangements, various furnaces, Low heat of geothermal heat is absorbed by the heat pump evaporation heat source, so the reversible heat of compression is reversed, and the isothermal process of reversing the condensation is supplied to the steam for power generation to make the waste heat resource and the electric power generation efficiency is greatly improved and valuable energy such as fossil fuel and nuclear energy Another purpose is to provide a system that can contribute to the environment such as prevention of global warming as well as economic efficiency by reducing resource waste.

In order to achieve the above-mentioned object, the present invention provides a system for obtaining power supplied with heat energy from an external heat source, the turbine being driven through a first fluid in the form of steam, the state of which is changed by the heat source, And a pump for circulating a first fluid in the form of a liquid cooled in the condenser along any one of the heat engine flow paths selected from the turbine and the heat source, Includes a heat engine system; And a heat pump system that circulates a second fluid that is in heat exchange with the first fluid of the heat engine system and provides heat energy to the first fluid to circulate to the turbine.

The first fluid cooled through the condenser is divided and introduced into the turbine and the heat source through a distributor provided in the heat pipe line.

The heat pump system includes: a heat pump evaporator for performing an isothermal change of the second fluid by heat exchange with the first fluid flowing into the condenser; A heat pump compressor for thermally changing the second fluid of the heat pump evaporator to a high pressure to generate a mixed gas; A heat pump condenser for accumulating heat from the mixed gas compressed at a high pressure through the heat pump compressor and for isothermally changing the liquid to make the second fluid liquid; And a heat pump expansion valve provided between the heat pump condenser and the heat source evaporator for reducing the pressure by changing the static pressure of the second fluid flowing into the heat source evaporator.

Preferably, the heat source is any one of exhaust heat of a boiler, waste heat of a furnace, and geothermal heat, and the first fluid is heated to a high temperature to generate steam to drive the turbine.

The heat source includes a heat source system that exhausts or circulates in the furnace or heats and compresses the third fluid to a high temperature by using geothermal heat to accumulate high temperature thermal energy from the third fluid and perform heat exchange with the first fluid It is preferable to further comprise.

The heat source system may include a heat source evaporator for deriving thermal energy from the furnace or the geothermal heat to induce an isothermal change of the third fluid; A heat source compressor for generating a mixed gas by adiabatically varying the third fluid of the heat source evaporator at a high pressure; A heat source condenser for condensing the heat from the mixed gas compressed at a high pressure through the heat source compressor, and liquid-isothermally changing the third fluid; And a heat source unit expansion valve provided between the heat source condenser and the heat source evaporator to reduce the pressure of the third fluid flowing into the heat source evaporator by reducing the pressure of the third fluid.

The heat engine system further includes a superheater provided between the turbine and the heat pump condenser to reheat the first fluid, the check valve being provided between the superheater and the turbine so that the directionality of the first fluid is limited .

According to the present invention as described above, the present invention has been devised in order to solve the above-mentioned problems, and it is an object of the present invention to provide an air conditioner in which waste heat derived from an external heat source, And the heat is transferred to the combined heat pump through a condenser. The heat transfer is performed using a fluid, and the fluid is evaporated at a high temperature through the evaporator and the condenser to be again turned into thermal energy. As a result, The energy device such as a high-efficiency compact power generation system can be realized.

FIG. 1 is a whole view for explaining a power generation system according to a preferred embodiment of the present invention;
2 is a detailed view for explaining a heat engine system according to a preferred embodiment of the present invention;
3 is a detailed view for explaining a heat pump system according to a preferred embodiment of the present invention,
4 is an overall view of a power generation system for explaining an example of a heat source according to a preferred embodiment of the present invention,
5 is a detailed view illustrating a heat source system according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the present invention, the defined terms are defined in consideration of the functions of the present invention, and they can be changed according to the intention or custom of the technician working in the field, and the definition is based on the contents throughout this specification It should be reduced.

The heat pump is based on the principle that "power is required to transfer heat from a low-temperature material to a high-temperature material", or it is capable of removing heat from unnecessary materials to be removed, In order to provide a high temperature to the steam such as the condensed high-temperature steam discharged from the steam turbine, the furnace, the boiler exhaust, and the geothermal heat of about 100 to 200 ° C. after the work is performed, And the water vapor or water mixture which evaporates in the heat pump is circulated in the heat pump to circulate the state change by the input power so that the evaporation heat is obtained from the high temperature heat source and the high temperature steam required for the power generation in the compression arrangement is obtained with high resultant coefficient, It is possible to greatly improve the power generation efficiency.

Therefore, by combining the heat pump with the heat pump with the evaporating fluid at high temperature and using the waste heat from the high temperature as the heat source, it is possible to solve the heat and the semi- And the energy can be greatly reduced.

FIG. 2 is a detailed view of a heat pipe system, and FIG. 3 is a detailed view of a heat pump system. FIG.

As shown, the power system 100 combines a heat engine system 130 and a heat pump system 140 in a heat source 110 to regenerate the heat energy discarded through the condenser 132 at a high temperature, , It is aimed to reduce the waste of valuable energy such as fossil and nuclear energy by recycling waste heat, thereby contributing to improvement of economic efficiency as well as enhancement of competitiveness and prevention of warming.

In addition, the power system 100 is mainly applied to a large-scale power plant, and the thermal energy discarded through the condenser 132 is regenerated at a high temperature to be used for power generation, so that power generation efficiency can be increased, It is possible to construct the power generation system by using the high temperature exhaust as the heat source through the boiler used in various industrial fields as well as the furnace. It is possible.

The power system 100 includes a heat source 110 for providing a heat source, a heat engine system 130 for circulating a first fluid around the heat source 110, and a heat exchanger 130 for heat- And a heat pump system 140 in which the second fluid is circulated so as to be circulated to the heat source 110 by raising the temperature of the first fluid.

The heat engine system 130 includes a condenser 132 and a condenser 132 for generating power by driving the turbine 131 through a change in state of the fluid by the heat source 110 and for cooling the steam flowing in the turbine 131, So that the first fluid in the liquid phase cooled in the second heat exchanger is circulated along the heat pipe line.

1, the first fluid is circulated through the turbine 131, the condenser 132, and the pump 133 to the turbine, or is circulated through the heat pipe line 135 as shown in FIG. 2, To the heat source 110 so that a part of the heat is supplied to the turbine 131 through the turbine 131, the condenser 132 and the distributor P at a predetermined ratio to the heat source via the heat pump condenser 143 can do. Here, it is preferable that the ratio is selectively distributed according to the flow rate of the heat pipe line to the distributor (P), and when the flow rate is the same, the ratio is preferably distributed at a ratio of 5: 5.

The heat engine system 130 may further include a superheater 134 for reheating the first fluid flowing into the turbine 131 into the heat pipe line 135 to multiply the driving force of the turbine 131, 134 are preferably provided between the heat pump condenser 143 and the turbine 131 and a check valve C is further provided between the superheater 134 and the turbine 131 so that the directionality of the first fluid is restricted Is very preferable.

Here, the check valve C is provided for limiting the directionality of the flow of the fluid to prevent backflow. Further, the check valve C may be further provided between the heat source 110 and the turbine 131.

The heat pump system 140 is for causing a second fluid to be heat-exchanged with the first fluid of the heat engine system 130 to circulate along the heat pump fluid line 145.

The heat pump system 140 includes a heat pump evaporator 141 and a heat pump evaporator 141 that heat exchange with the first fluid flowing into the condenser 132 to change the isothermal temperature of the second fluid, A heat pump compressor 142 that generates gas, a heat pump condenser 143 and a heat pump condenser 143 that heat the heat of the mixed gas compressed at high pressure through the heat pump compressor 142, And a heat pump expansion valve 144 provided between the heat pump evaporator 141 and reducing the pressure by changing the static pressure of the second fluid flowing into the heat pump evaporator 141.

The heat pump evaporator 141 is built in the condenser 132 so that the steam flowing from the turbine 131, that is, the first fluid and the second fluid can exchange heat with each other, .

At this time, the second fluid flowing into the heat pump evaporator 141 is higher than the temperature at which the second fluid flows after the adiabatic change through the heat pump expansion valve 144 and is isothermal change endothermic, so that the necessary heat of the high temperature is absorbed in the heat source of the higher temperature And the evaporation heat is higher than the sensible heat of the cool water at a low temperature because it is about five times as much as the sensible heat at the isothermal temperature.

Therefore, the condenser 132 does not affect the degree of vacuum, and the remaining heat is cooled by the cooling means arranged in the final stage, so that no problem occurs in the vacuum of the condenser 132. [

Here, the expansion valve is for fitting the second fluid introduced into the heat pump evaporator 141, and is not limited to the expansion valve, and may be replaced by an orifice having similar functions.

The heat pump compressor 142 is for generating a high pressure heat energy by generating a high pressure mixed gas by changing the second fluid suction adiabatic heat of the heat pump evaporator 141.

The heat pump condenser 143 is for heat energy to be stored in the high-pressure mixer by the heat pump compressor 142, wherein the stored heat energy is such that the first fluid entering the turbine, as shown, Thereby operating the turbine 131.

As described above, the power generation system 100 of the present invention can improve power generation efficiency through heat exchange between the first fluid and the second fluid as shown in FIG. 1, and more specifically, 1 fluid is vaporized to generate power by driving the turbine 131 and is introduced into a heat pump condenser 143 that is cooled by the condenser 132 and is supplied with heat energy through a pump 133 to obtain heat at a high temperature, (110), thereby increasing energy efficiency.

In other words, for example, when a plurality of power generation columns is used as a heat source,

Steam pressure for the electric power generation 230kg / ㎠ temperature 550 ℃ when v = 0.01437㎥ / kg, h "805.70kcal / kg s = 1.4963kcal / kg f K obtained in the column arrangement of a heat pump system for supplying high-temperature steam, and the The steam is supplied to the heat source 110 to obtain the heat of combustion of the fuel to be superheated by the high temperature steam and the transfer turbine 131 produces electric energy to the turbine 131, The heat pump system 140 obtains heat from the waste heat at a rate of about 21% except for the power supplied to the heat pump system 140 although the heat source 140 is 32.12% and the heat source 110 is 67.88% %.

However, as an example, it shows the approximate efficiency and should not be limited to the above value.

4, the heat source 110 further includes a heat source system 121 for heating the first fluid to a high temperature according to the heat source 110 and generating steam to drive the turbine 131, This will be described with reference to the drawings.

FIG. 4 is an overall view of a power generation system for explaining an example of a heat source according to a preferred embodiment of the present invention, and FIG. 5 is a detailed view of a heat source system.

As shown in the figure, the heat source system 121 uses any one of a boiler, a waste heat of a furnace, and a geothermal heat as a heat source. When the heat source is relatively low in thermal energy compared to a power plant, Or circulated, or by using geothermal heat to heat and compress the third fluid to a high temperature to accumulate high-temperature heat energy from the third fluid and to effect heat exchange with the first fluid.

The heat source system 121 includes a heat source evaporator 122 for deriving thermal energy from the furnace or the geothermal heat to induce a change in isothermal temperature of the third fluid, a third fluid flowing through the heat source evaporator 122 at a high pressure A heat source compressor (123) for generating a mixed gas to be adiabatically changed, heat of the mixed gas compressed at a high pressure through the heat source compressor (123) is stored, and the isomorphous change is generated, The heat energy accumulated through the third fluid is provided between the heat source condenser 124 and the heat source compressor 123 and the heat source evaporator 122 so that the third heat source evaporator 122, And a heat source unit expansion valve 125 for reducing the pressure of the fluid to induce a change in the static pressure.

Here, the heat source system 121 is configured such that the third fluid circulates through the heat source bypass conduit 126 and is heated to a high temperature by the heat exchanged through the heat source evaporator 122 and the heat exhausted and discharged from the geothermal or furnace, The three fluids are compressed by the mixed vapor in the heat source compressor 123 and arranged in the heat source condenser 124 and then circulated to the heat source evaporator 122 through the heat source expansion valve 125.

The first fluid circulates through the heat source condenser 124 and is used to drive the turbine 131 to obtain thermal air. The first fluid is then supplied to the turbine 131, the condenser 132, and the distributor P, The heat is circulated through the heat source condenser 124 and the heat pump condenser 124 at a predetermined ratio to obtain heat, and the heat is circulated back to the turbine 131 to obtain power.

As described above, the power system of the present invention can be used in combination with a heat pump and a heat pump, and in particular, a heat pump system can transfer heat from a low temperature heat source to a high temperature and transfer heat to a temperature limit that the heat exchanger can not transfer In particular, by using a heat pump system, there has been no attempt to raise heat to a load of 200 to 400 DEG C or more at a heat source of about 100 DEG C or more, and by implementing the present invention, Can be expected to develop the industry.

In addition, when the heat engine system obtains work from the heat, the isothermal state change of the first fluid evaporating at a high temperature, when using an arrangement that discards the work obtained with low efficiency against the direction of the conversion as an evaporator heat source of the heat pump, It is possible to obtain a high coefficient of performance (COP) and superheating degree, and the next step is to exist as a mixed fluid while maintaining the heat compression at a high temperature. Even if heat exchange is performed with the first fluid of the high temperature heat pipe in the condenser, It is possible to improve the productivity of the power by largely eliminating the semi-directionality of the conversion of heat and work in the isothermal state.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

100: Power system 110: Heat source
121: heat source system 122: heat source evaporator
123: heat source compressor 124: heat source condenser
125: Heat source unit expansion valve 126: Heat source auxiliary pipe
130: heat engine system 131: turbine
132: condenser 133: pump
134: superheater 135: heat pipe
140: heat pump system 141: heat pump evaporator
142: Heat pump compressor 143: Heat pump condenser
144: Heat pump expansion valve 145: Heat pump duct
150: cooling means

Claims (7)

A system for obtaining power supplied with thermal energy from an external heat source,
A condenser for cooling the first fluid in the form of vapor introduced from the turbine to generate power by driving the turbine through a first fluid in the form of steam in a state changed by the heat source, And a pump for circulating the fluid along any one of the heat engine flow path selected from the turbine and the heat source; And
And a heat pump system for circulating a second fluid to be heat-exchanged with the first fluid of the heat pipe system and circulating the first fluid by providing thermal energy to the turbine. Thereby obtaining power. The method according to claim 1,
The first fluid, cooled through the condenser,
Wherein the heat pump is divided into a turbine and a heat source through a distributor provided in the heat pipe, and the heat pump and the heat pump are combined to obtain power. The method according to claim 1,
In the heat pump system,
A heat pump evaporator for exchanging heat with the first fluid flowing into the condenser and isothermally changing the second fluid;
A heat pump compressor for thermally changing the second fluid of the heat pump evaporator to a high pressure to generate a mixed gas;
A heat pump condenser for accumulating heat from the mixed gas compressed at a high pressure through the heat pump compressor and for isothermally changing the liquid to make the second fluid liquid; And
And a heat pump expansion valve disposed between the heat pump condenser and the heat source evaporator for reducing the pressure by changing the static pressure of the second fluid flowing into the heat source evaporator. Lt; / RTI > The method according to claim 1,
The heat source may include:
Wherein the first fluid is heated to a high temperature and steam is generated to drive the turbine, characterized in that the heat pump is a combination of a heat pump and a heat pump Thereby obtaining power. 5. The method of claim 4,
The heat source may include:
And a heat source system for exhausting or circulating in the furnace or heating and compressing the third fluid at a high temperature by using geothermal heat to accumulate high temperature thermal energy from the third fluid and heat exchange with the first fluid, A system in which a heat pump and a heat pump are combined to obtain power. 6. The method of claim 5,
In the heat source system,
A heat source evaporator for deriving thermal energy from the furnace or the geothermal heat to induce an isothermal change of the third fluid;
A heat source compressor for generating a mixed gas by adiabatically varying the third fluid of the heat source evaporator at a high pressure;
A heat source condenser for condensing the heat from the mixed gas compressed at a high pressure through the heat source compressor, and liquid-isothermally changing the third fluid; And
And a heat source unit expansion valve disposed between the heat source condenser and the heat source evaporator for reducing the pressure by changing the static pressure of the third fluid flowing into the heat source evaporator. Lt; / RTI > 7. The method according to any one of claims 1 to 6,
The hot-
And a superheater provided between the turbine and the heat pump condenser for reheating the first fluid, the check valve being provided between the superheater and the turbine to limit the directionality of the first fluid, A system that combines power from a heat pump and a heat pump.

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