CN208154856U - A kind of three hot composite volume formula solar heat absorbers - Google Patents

Abstract

The utility model discloses a kind of three hot composite volume formula solar heat absorbers, and mainly the optical window made of shell, calcirm-fluoride, cold pipe, high temperature coil pipe, medium temperature coil pipe, low-temperature coil, multiple fins, high temperature efferent duct, medium temperature efferent duct and low temperature efferent duct are constituted.Fin leads to supercooling tube and is installed in shell, and high temperature coil pipe, medium temperature coil pipe and low-temperature coil are mounted on fin, and high temperature coil pipe, medium temperature coil pipe and low-temperature coil are sequentially distributed from the direction far from optical window, the cold liquid being then located in high temperature coil pipe, medium temperature coil pipe and low-temperature coil can absorb different heats, to obtain the fluid of three kinds of different temperatures, for follow-up equipment use.High temperature coil pipe, medium temperature coil pipe, low-temperature coil and fin form labyrinth effect in shell simultaneously, make to be not easy to reflect away into the intracorporal sunlight of shell, reduce radiation heat loss and convection current heat waste, guarantee that solar energy is fully absorbed.

Description

A three-heat composite volumetric solar heat absorber

technical field

The utility model relates to the technology of a solar heat absorber, in particular to a three-heat composite volumetric solar heat absorber.

Background technique

Energy is the driving force for social development and progress, and today the fossil energy on the earth is continuously decreasing, and the human demand for energy is getting higher and higher. In order to cope with the increasingly serious energy shortage and environmental pollution problems, human beings have turned their attention to the development and utilization of renewable energy. With "energy, environment, and development" as the theme of the times, it has become a new trend in the development of energy utilization to develop and utilize new energy scientifically and rationally, to maintain the safety of the ecological environment and the sustainable development of human society.

As a clean, non-polluting, widely distributed and low-cost renewable energy, solar energy has attracted increasing attention. At present, the methods for utilizing solar energy mainly include photothermal conversion, photoelectric conversion and photochemical conversion. Among them, the photothermal conversion of solar energy is to gather low-temperature solar radiation through a solar concentrator to form high-density radiant heat energy, and then convert high-concentration ratio solar radiation into high-temperature heat energy through a high-temperature thermal energy conversion device. The high-temperature thermal utilization of solar energy is one of the development trends of solar thermal utilization technology. The high-temperature conversion technology of solar energy involves the collection and transmission of spectral energy, and the coupling of various physical processes such as thermal radiation, heat conduction, and convection in high-density energy conversion devices. It is currently an international At the forefront of solar research. Use the concentrator to gather sunlight, pass the solar energy to the heat exchange working medium through the solar heat absorber, and finally realize the thermal power generation of the solar pool through the thermal power device. Solar thermal power generation systems mainly include two types: non-focused and focused. Among them, the non-focused system mainly includes solar hot air power generation and solar pool thermal power generation. The focused system is divided into trough type according to the different solar concentrators used. , tower and dish three. Among them, the dish solar concentrator is mainly composed of a rotating parabolic reflector, a heat absorber, a tracking device, and a thermal power conversion device. The power of the device is small, and it can be applied to a distributed energy system. The solar heat absorber converts the concentrated solar energy into the thermal energy of the heat exchange working medium, and its heat absorption efficiency is an important factor affecting the energy utilization rate of the solar power generation system. There are two types of solar heat absorbers: volumetric and surface. Among them, the volumetric heat absorber uses porous materials as the heat exchange medium, which greatly increases the heat exchange area, and has the advantages of light weight and high heat exchange efficiency.

Based on the Carnot cycle, the Rankine cycle controls the working fluid to be heated to saturated steam and continues to heat for a period of time to make it superheated, and then sends it to the steam turbine to do work. At the same time, after the working fluid is cooled to the state of saturated water in the condenser, the pressure is slightly increased for preheating, and then sent back to the heater for heating. The working fluid can continuously undergo four processes of heat absorption, expansion, heat release, and compression in the thermal equipment, so that heat energy can be converted into mechanical energy.

Commonly used optical window preparation materials include BK ₇ glass, ultraviolet grade fused silica, infrared grade calcium fluoride, etc. According to the research of Xu Lanyun et al., using the crucible descent method, the transmittance in the infrared range can be more than 90% and relatively stable. , in the ultraviolet-mid-infrared range, the CaF ₂ crystal with a small refractive index change rate has less light reflection loss.

Generally speaking, there are many types of solar heat absorbers at present, but the light-to-heat conversion efficiency is not high, and the manufacturing process is complicated, the cost is high, and the large-scale production has not yet been popularized, so it cannot be applied on a large scale. How to reduce the heat loss in the process of solar energy conversion, realize the high-efficiency storage of solar energy and the wide application of thermal power generation technology is the key to the development and research of current solar thermal power generation technology.

Utility model content

The purpose of this utility model is to provide a three-heat composite volumetric solar heat absorber in order to overcome the shortcomings of the above prior art. The three-heat composite volumetric solar heat absorber makes it difficult for light to be reflected and produced, which is conducive to fully absorbing solar energy.

The purpose of this utility model is achieved through the following technical solutions: the three-heat composite volumetric solar heat absorber includes a housing, an optical window made of calcium fluoride, a cold pipe, a high-temperature coil, a medium-temperature coil, and a low-temperature coil , a plurality of fins, a high-temperature output tube, a medium-temperature output tube and a low-temperature output tube; the optical window is installed at one end of the housing, the cold tube is installed in the housing, and one end of the cold tube extends out of one end of the housing Outside: multiple fins are fixed on the outer wall of the cold pipe, and the multiple fins are evenly distributed relative to the axis of the cold pipe, and the multiple fins are all located in the shell; the high temperature coil, the medium temperature coil and the low temperature coil are all installed on the fins, and the high temperature coil, medium temperature coil and low temperature coil are distributed from the direction away from the optical window; one end of the high temperature coil is connected to the cold pipe through a high temperature splitter, and the high temperature coil The other end is connected to one end of the high-temperature output pipe through a high-temperature manifold, and the high-temperature diverter and high-temperature manifold are distributed along the flow direction of the medium in the cold pipe; one end of the medium-temperature coil is connected to the cold pipe through a medium-temperature diverter, and the The other end of the medium-temperature coil is connected to one end of the medium-temperature output pipe through a medium-temperature confluence, and the medium-temperature diverter and the medium-temperature confluence are distributed along the flow direction of the medium in the cold pipe; one end of the low-temperature coil is connected to the cold pipe through a low-temperature diverter The other end of the low-temperature coil is connected to one end of the low-temperature output pipe through a low-temperature confluence, and the low-temperature splitter and low-temperature confluence are distributed along the flow direction of the medium in the cold pipe; the other end of the high-temperature output pipe, the medium-temperature The other end of the output pipe and the other end of the low-temperature output pipe protrude from the other end of the housing; the inner wall surface of the housing, the outer surface of the fins, the outer surface of the high-temperature coil, the outer surface of the medium-temperature coil and the low-temperature The outer surface of the coil is provided with a paint layer for absorbing solar energy.

Preferably, the housing has a double-layer structure, and a heat insulating material is filled between the inner layer and the outer layer of the housing.

Preferably, the shell includes two symmetrical half shells, and the two half shells are connected by bolts.

Preferably, the cold pipe includes a curved pipe part and a straight pipe part, one end of the curved pipe part protrudes from one end of the casing, and the other end of the curved pipe part is connected to the straight pipe part, and the straight pipe part The axis of the housing is on the same straight line as the central axis of the housing, and the optical window is installed in the center of one end of the housing.

Preferably, the paint layer is made of phthalocyanine green and iron-copper composite oxide.

Preferably, the other end surface of the cold pipe is a closed structure, and the distance between the other end surface of the cold pipe and the opposite inner wall of the housing is greater than or equal to 50mm.

Preferably, the three-heat composite volumetric solar heat absorber further includes an annular support, the outer curved surface of the annular support is connected to the inner wall of the housing, and the center of the annular support is connected to the cold pipe.

Preferably, the outer wall of the cold pipe is provided with a high-temperature branch pipe, the high-temperature splitter is in the shape of a ring, and the inner side of the high-temperature splitter is provided with a high-temperature inlet matching the high-temperature branch pipe; the high-temperature splitter is sleeved on the cold pipe. The high-temperature branch pipe is connected to the high-temperature inlet; the right side of the high-temperature branch pipe is provided with a first high-temperature opening equal to the number of high-temperature coils, and the first high-temperature opening is connected to one end of the high-temperature coil;

Preferably, the high-temperature confluence is in the shape of a ring, and the left side of the high-temperature confluence is provided with a second high-temperature opening equal to the number of high-temperature coils, and the second high-temperature opening is connected to the other end of the high-temperature coil. The right side of the high temperature confluence is connected with the high temperature output pipe.

Preferably, the outer wall of the cold pipe is provided with a medium-temperature branch pipe, the medium-temperature shunt is in the shape of a ring, and the inner side of the medium-temperature shunt is provided with a medium-temperature inlet matching the medium-temperature branch pipe; tube, and the medium-temperature branch pipe is connected to the medium-temperature inlet; the right side of the medium-temperature branch pipe is provided with a first medium-temperature opening equal to the number of the medium-temperature coil, and the first medium-temperature opening is connected to one end of the medium-temperature coil;

Preferably, the medium-temperature confluence is in the shape of a ring, and the left side of the medium-temperature confluence is provided with a second medium-temperature opening equal to the number of medium-temperature coils, and the second medium-temperature opening is connected to the other end of the medium-temperature coil. The right side of the medium temperature confluence is connected with the medium temperature output pipe.

Preferably, the outer wall of the cold pipe is provided with a low-temperature branch pipe, the low-temperature shunt is annular, and the inner side of the low-temperature shunt is provided with a low-temperature inlet matching the low-temperature branch pipe; the low-temperature shunt is sleeved on the cold pipe. The low-temperature branch pipe is connected to the low-temperature inlet; the right side of the low-temperature branch pipe is provided with a first low-temperature opening equal to the number of the low-temperature coil, and the first low-temperature opening is connected to one end of the low-temperature coil;

Preferably, the low-temperature manifold is in the shape of a ring, and the left side of the low-temperature manifold is provided with a second low-temperature opening equal to the number of cryogenic coils, and the second low-temperature opening is connected to the other end of the cryogenic coil. The right side of the cryogenic manifold is connected with the cryogenic output pipe.

The utility model has the following advantages relative to the prior art:

1. Strong ability to capture and transmit light. The optical window of the utility model is made of calcium fluoride, which has strong spectral selectivity and transmittance, and has a transmittance of more than 90% for the light in the 0.3-3μm band that occupies more than 95% of the total energy of the solar spectrum. , the spectral transmittance of the band above 3μm is extremely small, which reduces the radiation heat loss and convective heat loss of the heat exchange device.

2. Radiation heat loss and convection heat loss are small. The utility model has only one optical window directly communicated with the outside world, and the internal air does not convect with the outside world. After the incident light enters the cavity, it is easily absorbed by the paint layer made of phthalocyanine green and iron-copper composite oxide coated on the inner wall of the heat absorber and the fin coil assembly. Coil and cryogenic coil) are installed in the shell through fins, so that the light inside the shell produces a labyrinth effect, so that the light is not easy to reflect, and the sunlight can be fully absorbed by the coating layer.

3. The heat conduction loss through the shell is small. The shell is a double-layer steel hollow structure, and the inner and outer layers of the shell are filled with insulating materials (ie glass fiber, asbestos and rock wool, etc.), which greatly reduces the total thermal conductivity of the shell.

4. The internal heat exchange capacity of the heat absorber is strong. The coils of the utility model (that is, the high-temperature coils, the medium-temperature coils and the low-temperature coils) have a large contact area with the fins, enhance heat transfer, and ensure effective exchange of heat.

5. The shell is easy to disassemble and assemble. The double-layer steel shell is composed of the upper and lower heat sink shells connected by bolts, and the bolts are sealed with rubber gaskets, which is easy to disassemble and assemble. The structure of the finned coil assembly of the heat absorber is symmetrical, which is convenient for manufacture, modular assembly, and its specification can be enlarged or reduced according to different work requirements.

Description of drawings

Fig. 1 is a schematic structural view of a three-heat composite volumetric solar heat absorber of the present invention.

Fig. 2 is a cross-sectional view of the first viewing angle of the three-heat composite volumetric solar heat absorber of the present invention.

Fig. 3 is a side view of the three-heat composite volumetric solar heat absorber of the present invention.

Fig. 4 is a cross-sectional view of the second viewing angle of the three-heat composite volumetric solar heat absorber of the present invention.

Fig. 5 is a structural schematic diagram of various internal components of the housing of the present invention.

Fig. 6 is a front view of various internal components of the housing of the present invention.

Fig. 7 is a structural schematic diagram of the cold pipe of the present invention.

Fig. 8 is a front view of the fin of the present invention.

Fig. 9 is a front view of the high temperature shunt of the present invention.

Fig. 10 is a front view of the high temperature manifold of the present invention.

Fig. 11 is a structural schematic diagram of the utility model of the high-temperature confluence installed on the cold pipe.

Fig. 12 is a front view of the medium-temperature shunt of the present invention.

Fig. 13 is a front view of the medium temperature collector of the present invention.

Fig. 14 is a structural schematic diagram of the utility model in which the medium-temperature confluence is installed on the cold pipe.

Fig. 15 is a front view of the low temperature shunt of the present invention.

Fig. 16 is a front view of the cryogenic manifold of the present invention.

Fig. 17 is a structural schematic diagram of the utility model low-temperature manifold installed on the cold pipe.

Among them, 1 is the shell, 1-1 is the half shell, 1-2 is the heat insulating material, 2 is the optical window, 3 is the cold pipe, 3-1 is the bending part, 3-2 is the straight pipe part, 4 is the high temperature Coil, 5 is medium temperature coil, 6 is low temperature coil, 7 is fin, 7-1 is high temperature fin, 7-2 is medium temperature fin, 7-3 is low temperature fin, 8 is high temperature output pipe, 9 is a medium-temperature output pipe, 10 is a low-temperature output pipe, 11 is a high-temperature diverter, 12 is a high-temperature confluence, 13 is a medium-temperature diverter, 14 is a medium-temperature confluence, 15 is a low-temperature diverter, 16 is a low-temperature confluence, and 17 is a Bolt, 18 is an annular support, 19 is a high temperature branch pipe, 20 is a high temperature inlet, 21 is a first high temperature opening, 22 is a second high temperature opening, 23 is a medium temperature branch pipe, 24 is a medium temperature inlet, 25 is a first medium temperature opening, 26 is The second medium-temperature opening, 27 is a low-temperature branch pipe, 28 is a low-temperature inlet, 29 is a first low-temperature opening, 30 is a second low-temperature opening, 31 is a groove, 32 is a retaining post, 33 is a clamping hole, and 34 is a through hole.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

The three-heat composite volumetric solar heat absorber shown in Figures 1 to 6 includes a shell, an optical window made of calcium fluoride, a cold pipe, a high-temperature coil, a medium-temperature coil, a low-temperature coil, and multiple fins. sheet, high-temperature output pipe, medium-temperature output pipe, and low-temperature output pipe; the optical window is installed at one end of the casing, the cold pipe is installed in the casing, and one end of the cold pipe extends outside one end of the casing; multiple sheets The fins are fixed on the outer wall of the cold pipe, and the plurality of fins are evenly distributed relative to the axis of the cold pipe, and the plurality of fins are all located in the housing; the high temperature coil, the medium temperature coil and the low temperature coil are all installed on sheets, and the high-temperature coil, medium-temperature coil and low-temperature coil are distributed from the direction away from the optical window; one end of the high-temperature coil is connected to the cold pipe through a high-temperature splitter, and the other end of the high-temperature coil is connected through a high-temperature The confluence is connected to one end of the high-temperature output pipe, and the high-temperature diverter and the high-temperature confluence are distributed along the flow direction of the medium in the cold pipe; one end of the medium-temperature coil is connected to the cold pipe through a medium-temperature diverter, and the middle-temperature coil is connected to the cold pipe. The other end is connected to one end of the medium-temperature output pipe through a medium-temperature manifold, and the medium-temperature diverter and the medium-temperature manifold are distributed along the flow direction of the medium in the cold pipe; one end of the low-temperature coil is connected to the cold pipe through a low-temperature diverter, and the The other end of the low-temperature coil is connected to one end of the low-temperature output pipe through a low-temperature confluence, and the low-temperature splitter and the low-temperature confluence are distributed along the flow direction of the medium in the cold pipe; the other end of the high-temperature output pipe, the other end of the medium-temperature output pipe One end and the other end of the low-temperature output pipe protrude from the other end of the housing; the inner wall surface of the housing, the outer surface of the fins, the outer surface of the high-temperature coil, the outer surface of the medium-temperature coil and the outer surface of the low-temperature coil The surface is provided with a paint layer for absorbing solar energy.

Specifically, as shown in FIG. 5 and FIG. 6 , there are 6 fins, and the 6 fins are evenly distributed with respect to the circumference of the central axis of the cold pipe. Each fin includes high-temperature fins, medium-temperature fins and low-temperature fins. Every two high-temperature coils are installed on both sides of each high-temperature fin, and every two medium-temperature fins are installed on both sides of each medium-temperature fin. , every two cryogenic coils are installed on both sides of each cryogenic fin, the structure is simple and easy to install. The installation of fins and coils (i.e. high temperature coil, medium temperature coil and low temperature coil) forms a labyrinth effect in the housing, so that the light entering the housing is less likely to be reflected and thus fully absorbed by the paint layer. The fins are made of nickel alloy to ensure the heat transfer effect, and also make the fins have various physical properties such as light weight, high specific strength, vibration reduction, heat dissipation, impact energy absorption, electromagnetic shielding, etc., and promote the effective exchange of heat. The coils (high temperature coil, medium temperature coil and low temperature coil) are made of brass. As shown in Figure 8, the outer wall of the coil is pressed, and the side of the fin is provided with a groove that matches the shape of the coil. When the coil is installed in the groove, the contact surface between the coil and the fin increases. , which further facilitates the cooling liquid in the coil to absorb heat.

The casing has a double-layer structure, and a heat insulating material is filled between the inner layer and the outer layer of the casing. This setting reduces the thermal conductivity of the housing and reduces heat loss inside the housing. The heat insulating material can be any one of glass fiber, asbestos, rock wool and silicate. The entire shell is divided into a high temperature zone, a medium temperature zone and a low temperature zone along its axial direction. The high temperature zone and the low temperature zone are respectively fixed at both ends of the medium temperature zone. Conical shape, the middle temperature zone is cylindrical, and the optical window is installed at one end of the high temperature zone.

As shown in Fig. 2 and two roads 4, the shell includes two symmetrical half shells, which are connected by bolts. This arrangement facilitates assembly of the housing.

The cold pipe includes a curved pipe part and a straight pipe part, one end of the curved pipe part protrudes from one end of the housing, and the other end of the curved pipe part is connected to the straight pipe part, and the axis of the straight pipe part is in line with the straight pipe part. The central axes of the casing are on the same straight line, and the optical window is installed at the center of one end of the casing. This structure prevents the installation of the cold pipe from affecting the optical window. The optical window is installed in the center, which ensures the uniformity of light entering the inner cavity of the housing.

The paint layer is made of phthalocyanine green and iron-copper composite oxide. Generally, iron-copper composite oxide is mixed with phthalocyanine green: Fe ₃ CuO ₅ is used as pigment, acrylic resin is used as binder, ethyl acetate, butyl acetate and xylene are used as solvent, and multiple spraying methods are used. The thickness of the coating on the steel plate substrate shall not exceed 3 μm. The solar absorption ratio of the coating is 0.94-0.96, and the emissivity ratio is 0.37-0.39.

The other end surface of the cold pipe is a closed structure, and the distance between the other end surface of the cold pipe and the opposite inner wall of the housing is greater than or equal to 50 mm.

The three-heat composite volumetric solar heat absorber also includes an annular support, the outer curved surface of the annular support is connected to the inner wall of the shell, and the center of the annular support is connected to the cold pipe, which ensures that the fins are installed stability.

As shown in Figures 9 to 17, the outer wall of the cold pipe is provided with a high-temperature branch pipe, the high-temperature splitter is in the shape of a ring, and the inner side of the high-temperature splitter is provided with a high-temperature inlet matching the high-temperature branch pipe; The splitter is sleeved on the cold pipe, and the high-temperature branch pipe is connected to the high-temperature inlet; the right side of the high-temperature branch pipe is provided with a first high-temperature opening equal to the number of high-temperature coils, and the first high-temperature opening is connected to one end of the high-temperature coil connection; the high-temperature confluence is in the shape of a ring, and the left side of the high-temperature confluence is provided with a second high-temperature opening equal to the number of high-temperature coils, and the second high-temperature opening is connected to the other end of the high-temperature coil. The right side of the high temperature manifold is connected with the high temperature output pipe. The outer wall of the cold pipe is provided with a medium-temperature branch pipe, the medium-temperature shunt is in the shape of a ring, and the inner side of the medium-temperature shunt is provided with a medium-temperature inlet matching the medium-temperature branch pipe; the medium-temperature shunt is sleeved on the cold pipe, and The medium-temperature branch pipe is connected to the medium-temperature inlet; the right side of the medium-temperature branch pipe is provided with a first medium-temperature opening equal to the number of medium-temperature coils, and the first medium-temperature opening is connected to one end of the medium-temperature coil; the medium-temperature confluence is round Ring, the left side of the medium temperature confluence is provided with a second medium temperature opening equal to the number of medium temperature coils, the second medium temperature opening is connected to the other end of the medium temperature coil, and the right side of the medium temperature confluence is connected to the medium temperature output tube connection. The outer wall of the cold pipe is provided with a low-temperature branch pipe, the low-temperature splitter is in the shape of a ring, and the inner side of the low-temperature splitter is provided with a low-temperature inlet matching the low-temperature branch pipe; the low-temperature splitter is sleeved on the cold pipe, and The low-temperature branch pipe is connected to the low-temperature inlet; the right side of the low-temperature branch pipe is provided with a first low-temperature opening equal to the number of low-temperature coils, and the first low-temperature opening is connected to one end of the low-temperature coil; the low-temperature confluence is round Ring shape, the left side of the cryogenic manifold is provided with a second low temperature opening equal to the number of cryogenic coils, the second low temperature opening is connected to the other end of the cryogenic coil, the right side of the cryogenic manifold is connected to the low temperature output tube connection. This structure is simple and easy to install. At the same time, in order to ensure the stability of the installation of the high-temperature manifold, the medium-temperature manifold and the low-temperature manifold, a retaining column is provided on the outer wall of the cold pipe, and a baffle column is provided on the inner side of the high-temperature manifold, the medium-temperature manifold, and the low-temperature manifold. Matching holes for the retaining posts. At the same time, in order to ensure overall compactness, there are through holes through which output pipes (ie, high-temperature output pipes and medium-temperature output pipes) pass through in the medium-temperature flow divider, medium-temperature flow divider, low-temperature flow flow divider and low-temperature flow combiner.

The working process of the three-heat composite volumetric solar heat absorber is as follows:

After the sunlight is concentrated, it enters the cavity of the heat absorber through the optical window. Since the optical window uses calcium fluoride with strong spectral selectivity and strong permeability to prevent it from leaving the cavity after being reflected, more than 90% of the sunlight is absorbed by the cavity. Absorbed by the paint layer coated on the inner wall of the heat sink shell, fins and coils (that is, high temperature coils, medium temperature coils and low temperature coils), these paint layers absorb sunlight to generate heat, and transfer the heat to the coil Tube. Because the distance between the high temperature coil, the medium temperature coil and the low temperature coil and the optical window is different, the heat received by the high temperature coil, the medium temperature coil and the low temperature coil is different. The high temperature coil close to the optical window can receive more heat, while the medium temperature coil and low temperature coil receive less heat in turn.

After the cold liquid enters the cold pipe, it enters the high-temperature coil, medium-temperature coil and low-temperature coil through the high-temperature splitter, medium-temperature splitter and low-temperature splitter respectively to absorb different heat. Then the cold liquid in the high temperature coil, the medium temperature coil and the low temperature coil absorbs different heat, so that the cold liquid is converted into three different temperature fluids. The fluid produced in the high temperature coil flows out of the high temperature output pipe, while the fluid produced in the medium temperature coil flows out of the medium temperature output pipe, and the fluid produced in the low temperature coil flows out of the low temperature coil.

These three fluids with different temperatures are delivered to the three pressure steam turbine solar thermal power generation systems through the high-temperature output pipe, the medium-temperature output pipe and the low-temperature output pipe respectively. This heat absorber absorbs solar energy through the paint layer in the shell, and the absorption rate is high.

The use of this three-heat composite volumetric solar heat absorber has the following benefits:

High, medium and low temperature liquids of different temperatures can be obtained through solar heating, and the obtained medium and high temperature fluids can be effectively used to solve the problem of heating gap caused by the serious shortage of supply due to the continuous increase of heating demand in my country. For a dish-type parabolic mirror field with an area of about 50,000m ₂ , the conversion of solar energy to working medium heat energy can be completed within 5-6 hours a day. It is used in a three-pressure steam turbine solar thermal power generation system and can maintain the normal operation of a 100MW generator set for 24 hours.

It not only makes full use of solar energy resources, realizes the rational development and utilization of solar energy, but also realizes the cascade utilization of thermal energy, improves the comprehensive utilization level of solar energy, reduces energy consumption costs, improves social and economic benefits, and meets the requirements of "energy saving, consumption reduction, environmental protection and emission reduction" requirements. According to the working process of the three-heat composite volumetric solar heat absorber, the total amount of heat converted from solar energy by the heat absorber can be used for the three-pressure steam turbine solar thermal power generation system, and the energy storage can be used for the continuous operation of the generator set for 100 days. Compared with the current 100MW thermal power generation unit in China, it can effectively reduce CO ₂ emissions by about 20,000 tons/year.

The specific implementation described above is a preferred embodiment of the utility model, and does not limit the utility model. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the utility model are included in the utility model. within the scope of the new protection.

Claims (10)

1. a kind of three hot composite volume formula solar heat absorbers, it is characterised in that：Including optical window made of shell, calcirm-fluoride Mouth, cold pipe, high temperature coil pipe, medium temperature coil pipe, low-temperature coil, multiple fins, high temperature efferent duct, medium temperature efferent duct and low temperature output Pipe；The optical window is installed on one end of shell, and in the cold pipe mounting shell body, and shell is stretched out in one end of the cold pipe On the outside of one end；Multiple fins are fixed on the outer wall of cold pipe, and multiple fins are distributed relative to the circumference of cold pipe, multiple wings Piece is respectively positioned in shell；The high temperature coil pipe, medium temperature coil pipe and low-temperature coil are mounted on fin, and the high temperature coil pipe, in Winchester disk pipe and low-temperature coil are certainly far from the directional spreding of optical window；One end of the high temperature coil pipe by high-temperature shunt with it is cold The other end of pipe connection, the high temperature coil pipe is connect by high temperature junction station with one end of high temperature efferent duct, and the high temperature shunts The flow direction of medium distribution of device and high temperature junction station in cold pipe；One end of the medium temperature coil pipe by medium temperature current divider with it is cold The other end of pipe connection, the medium temperature coil pipe is connect by medium temperature junction station with one end of medium temperature efferent duct, and the medium temperature shunts The flow direction of medium distribution of device and medium temperature junction station in cold pipe；One end of the low-temperature coil by low temperature current divider with it is cold The other end of pipe connection, the low-temperature coil is connect by low temperature junction station with one end of low temperature efferent duct, and the low temperature shunts The flow direction of medium distribution of device and low temperature junction station in cold pipe；The other end of the high temperature efferent duct, medium temperature efferent duct The other end of the other end and low temperature efferent duct stretches out the other end of shell；The inner wall of the shell, the outer surface of fin, height Outer surface, the outer surface of medium temperature coil pipe and the outer surface of low-temperature coil of Winchester disk pipe are equipped with the coating for absorbing solar energy Layer.

2. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The shell has double Layer structure, and heat-insulating material is filled between the internal layer and outer layer of the shell.

3. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The shell includes two A symmetrical half shell, this two half shells are bolted.

4. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The cold pipe includes curved Pipe portion and straight sections, one end of the bent portion are stretched out outside one end of shell then, and the other end and straight sections of the bent portion connect It connects, the axis of this straight sections and the central axis of shell are located along the same line, and the optical window is installed in shell one end The heart.

5. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The dope layer is by phthalein Cyanines are green and iron copper composite oxides are made.

6. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The cold pipe it is another End end face be enclosed construction, and the distance between the inner wall of shell of the end face of the other end of the cold pipe corresponding thereto be greater than or Equal to 50mm.

7. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：It further include annular branch It holds, the outer end curved surface of the ring-shaped bearing and the inner wall of shell connect, and the center of the ring-shaped bearing is connect with cold pipe.

8. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The outer wall of the cold pipe Equipped with high temperature branch pipe, the high-temperature shunt is annular in shape, and the inside of the high-temperature shunt is equipped with matched with high temperature branch pipe High temperature inlet；The high-temperature shunt is socketed on cold pipe, and the high temperature branch pipe is connect with high temperature inlet；The high temperature branch pipe Right then be equipped with first high temperature open equal with high temperature coil pipe quantity, this first high temperature open connect with one end of high temperature coil pipe；

The high temperature junction station is annular in shape, and it is high that the left side of the high temperature junction station is equipped with second equal with high temperature coil pipe quantity Temperature opening, this second high temperature open are connect with the other end of high temperature coil pipe, the right side of the high temperature junction station and high temperature efferent duct Connection.

9. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：The outer wall of the cold pipe Equipped with medium temperature branch pipe, the medium temperature current divider is annular in shape, and the inside of the medium temperature current divider is equipped with matched with medium temperature branch pipe Medium temperature entrance；The medium temperature current divider is socketed on cold pipe, and the medium temperature branch pipe is connect with medium temperature entrance；The medium temperature branch pipe Right then be equipped with first medium temperature equal with medium temperature coil pipe quantity and be open, this first medium temperature opening is connect with one end of medium temperature coil pipe；

The medium temperature junction station is annular in shape, and the left side of the medium temperature junction station is equipped in equal with medium temperature coil pipe quantity second Temperature opening, this second medium temperature opening are connect with the other end of medium temperature coil pipe, the right side of the medium temperature junction station and medium temperature efferent duct Connection.

10. three hot composite volume formula solar heat absorber according to claim 1, it is characterised in that：Outside the cold pipe Wall is equipped with low temperature branch pipe, and the low temperature current divider is annular in shape, and the inside of the low temperature current divider is equipped with to be matched with low temperature branch pipe Low-temperature inlet；The low temperature current divider is socketed on cold pipe, and the low temperature branch pipe is connect with low-temperature inlet；The low temperature branch pipe It is right be then equipped with first low temperature equal with low-temperature coil quantity and be open, this first low temperature opening and one end of low-temperature coil connect It connects；

The low temperature junction station is annular in shape, and it is low that the left side of the low temperature junction station is equipped with second equal with low-temperature coil quantity Temperature opening, this second low temperature opening are connect with the other end of low-temperature coil, the right side of the low temperature junction station and low temperature efferent duct Connection.