WO2018050076A1

WO2018050076A1 - Heat collection device for solar energy collector

Info

Publication number: WO2018050076A1
Application number: PCT/CN2017/101647
Authority: WO
Inventors: 曾智勇; 陈武忠; 崔小敏; 黄贝
Original assignee: 深圳市爱能森科技有限公司
Priority date: 2016-09-14
Filing date: 2017-09-13
Publication date: 2018-03-22
Also published as: CN106152560A; CN106152560B

Abstract

A heat collection device for a solar energy collector comprises: a first flow division pipe (11) and a second flow division pipe (12) disposed in parallel; multiple sets of heat collection pipe units (13), disposed side by side above the first flow division pipe (11) and the second flow division pipe (12) in the length direction of the first flow division pipe (11) and the second flow division pipe (12), for forming an irradiation surface of sunlight; an inflow pipe (14), communicating with one of the first flow division pipe (11) and the second flow division pipe (12); and an outflow pipe (15) communicating with the other of the first flow division pipe (11) and the second flow division pipe (12). The inflow pipe (14) is configured to allow a liquid working medium to sequentially flow into the multiple sets of heat collection pipe units (13), and the outflow pipe (15) is configured to allow the liquid working medium to sequentially flow out of the multiple sets of heat collection pipe units (13).

Description

Heat collecting device for solar collector

Technical field

The present disclosure relates to the field of solar thermal power generation technology, for example, to a heat collecting device for a solar thermal collector.

Background technique

With the development of civilization, the use of fossil fuels has increased dramatically, which has led to serious environmental pollution problems and global warming. This issue has become a hot topic in the international community, but due to the relationship between developed countries, developing countries and less developed countries. Different opinions related to national interests are moving in an undesired direction. Accordingly, various attempts have been made to develop new renewable energy sources to actively respond to global warming and environmental problems. New renewable energy refers to energy that is utilized by converting traditional fossil fuels or utilizing renewable energy sources such as sunlight, water, geothermal, and biological organisms. The new renewable energy source is the future energy source for sustainable energy supply systems. Due to the instability of oil prices and the restrictions of climate change agreements, the importance of new renewable energy sources has increased. Renewable energy includes solar heat, sunlight, biomass, wind, small hydro, geothermal, ocean energy and waste energy, while new energy sources include fuel cells, liquefied coal, gasified coal and hydrogen. The problem is that the cost of generating electricity from new renewable sources, especially sunlight, does not reach the grid parity equivalent to the cost of traditional thermal power generation using fossil fuels. However, with the development of technology, solar thermal power generation from solar thermal power generation in new renewable energy sources continues to decrease in power generation costs, and power generation efficiency is gradually increasing.

In the related art, by using a high-efficiency concentrator to collect solar energy in a short focal length while tracking the sun, the liquid medium in the solar collector is heated, and then thermally converted with an external power generating device. The heat collecting device of the solar collector designed in this way has Within the limited volume, the heat receiving area is small and the heat conversion efficiency is low, so it is necessary to improve the heat collecting device of the solar collector.

Summary of the invention

The present disclosure provides a heat collecting device for a solar heat collector, which has a large lighting area and high heat conversion efficiency.

This embodiment adopts the following technical solutions:

A heat collecting device for a solar collector, comprising: a first shunt tube and a second shunt tube that are erected in parallel; and the first shunt is arranged side by side along the length direction of the first shunt tube and the second shunt tube a plurality of sets of heat collecting tube units for forming a sun light irradiation surface above the tube and the second shunt tube; an inflow tube penetrating the one of the first shunt tube and the second shunt tube; and An outflow tube through which the other of the first shunt tube and the second shunt tube passes;

The inflow tube is configured to sequentially flow the liquid working medium into the plurality of sets of heat collecting tube units, and the outflow tube is configured to sequentially flow out the plurality of sets of heat collecting tube units for the liquid working medium.

Optionally, each set of the heat collecting tube unit comprises a first heat collecting tube unit and a second heat collecting tube unit; wherein the first heat collecting tube unit comprises a plurality of heat collecting tubes arranged side by side to form an arched heat absorbing surface; The second heat collecting unit comprises a plurality of heat collecting tubes arranged side by side in sequence and smoothly connected with the arched heat absorbing surface to form a heat absorbing surface having a non-zero angle with respect to the horizontal mask.

Optionally, the first heat collecting tube unit and the second heat collecting tube unit are both provided with a curved top portion, two supporting portions that are connected to the two ends of the curved top portion, and are respectively connected to the two supporting portions. Two load-bearing portions are connected, and the two load-bearing portions are respectively connected to the first and second shunt tubes.

Optionally, there is a gap between the plurality of heat collecting tubes of the first heat collecting tube unit and the bearing portion of the second heat collecting tube unit.

Optionally, the first shunt tube and the second shunt tube are respectively disposed with a plurality of shunting units spaced apart along the length direction of the tube, and the plurality of shunting units are respectively connected to the nozzles of the bearing portions, and the plurality of The first diverting unit is sequentially disposed through the first heat collecting tube unit and the second heat collecting tube unit which are arranged side by side.

Optionally, the tube lengths and arc lengths of the plurality of heat collecting tubes of the first heat collecting tube unit are all set to be equal, and the tube lengths of the plurality of heat collecting tubes of the second heat collecting tube unit are sequentially set and the arc length is equal .

Optionally, a plurality of drain pipes are respectively disposed on the plurality of splitter units of the first or second splitter tubes.

Optionally, the heat collecting device further includes a plurality of heat insulating brackets for erecting the first shunt tube and the second shunt tube, and a working channel for erecting the plurality of heat insulating brackets, wherein The plurality of heat insulating brackets are evenly disposed along the longitudinal direction of the work channel, and the support wall of the work channel is uniformly opened with a plurality of heat insulating holes along the length direction.

Optionally, each of the heat insulation brackets includes a support base fastened to the top of the work channel, a U-shaped card slot disposed at the top of the support base, and disposed in the U-shaped card slot Insulating cotton matched with the first shunt tube and the second shunt tube, respectively.

The heat collecting device for the solar collector provided by the embodiment is capable of disposing the liquid medium introduced through the inlet pipe along the side by side by the shunting action of the first shunt pipe and the second shunt pipe which are erected in parallel The heat pipe units are sequentially flowed, and finally the heat on the surface of the sunlight irradiated by the plurality of heat collecting tubes is discharged through the liquid medium in the heat collecting tube, thereby performing energy conversion with the external heat exchange device. In this embodiment, the lighting area is large and the heat conversion efficiency is high.

DRAWINGS

1 is a perspective view of a heat collecting device for a solar collector provided by the embodiment;

Figure 2 is a perspective view of the first heat collecting unit of Figure 1;

Figure 3 is a perspective view of the second heat collecting unit of Figure 1;

Figure 4 is a perspective view of the small heat collecting unit of the first heat collecting tube unit of Figure 2;

Figure 5 is a partial enlarged view of a portion A in Figure 4;

Figure 6 is a perspective view of the small heat collecting unit of the second heat collecting tube unit of Figure 3;

Figure 7 is a partial enlarged view of B in Figure 6;

Figure 8 is a perspective view of the first shunt tube and the second shunt tube of Figure 1 after installation;

Figure 9 is a partial enlarged view of E in Figure 8;

Figure 10 is a partial enlarged view of a portion C in Figure 8;

Figure 11 is a partial enlarged view of the portion D in Figure 8;

Figure 12 is a perspective view of the furnace body of Figure 1.

detailed description

The technical solutions of the present disclosure will be described below in conjunction with the accompanying drawings and by alternative embodiments.

As shown in FIG. 1 , the heat collecting device includes a first shunt tube 11 and a second shunt tube 12 that are erected in parallel, and is arranged side by side along the longitudinal direction of the first shunt tube 11 and the second shunt tube 12 in the first shunt tube 11 and a plurality of sets of heat collecting tube units 13 for forming a sun light irradiation surface above the two shunt tubes 12, and an inlet tube 14 penetrating the one of the first shunt tubes 11 and the second shunt tubes 12; The other one of the first shunt tube 11 and the second shunt tube 12 is connected to the outflow tube 15; wherein the inlet tube 14 is arranged to sequentially flow the liquid working medium into the plurality of sets of heat collecting tubes 13 The outflow pipe 15 is disposed to sequentially flow out the plurality of sets of heat collecting tubes 13 for the liquid working medium. The inlet tube 14 and the outlet tube 15 are connected to an external heat exchange device, respectively. When the sunlight is irradiated to the sunlight irradiation surface which is combined by the plurality of sets of heat collecting tube units 13 side by side, the liquid working medium in the plurality of sets of heat collecting tube units is introduced through the inlet tube 14, in the first shunt tube 11 and the second shunt tube Under the action of the tube 12, the plurality of heat collecting tubes are sequentially heated to be heated to a high temperature liquid, and the heated high temperature liquid finally flows into the external heat exchange device through the outlet tube 15. The external heat exchange device comprises a cryogenic liquid working tank for introducing the cryogenic liquid working medium in the cryogenic liquid working tank into the liquid pump of the inlet pipe 14, and is connected to the outlet pipe 15 for storage. A high temperature liquid working medium tank for a high temperature liquid working medium, and a steam turbine power generating device disposed between a low temperature liquid working medium tank and a high temperature liquid working medium tank.

Optionally, the liquid working medium in the embodiment is configured to heat the molten salt, and the external heat exchange device comprises a cryogenic liquid working medium tank, and the liquid for introducing the cryogenic liquid working medium in the cryogenic liquid working medium tank into the inlet pipe 14 The pump is connected to the outlet pipe 15 for storing a high temperature liquid working medium tank of a high temperature liquid working medium, and a steam turbine power generating device disposed between the low temperature liquid working medium tank and the high temperature liquid working medium tank.

Optionally, the heat collecting device in this embodiment is applicable to the tower type solar heat collector, and the heat collecting device can be irradiated by the sunlight reflected by the mirror group arranged by the bottom of the tower to perform energy conversion.

In this embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 3 , each set of the heat collecting tube unit includes a first heat collecting tube unit 131 and a second heat collecting tube unit 132 ; wherein the first heat collecting tube unit 131 includes a plurality of The root heat collecting tubes are arranged side by side to form an arched heat absorbing surface; and the second heat collecting tube unit 132 includes a plurality of heat collecting tubes for sequentially arranging side by side and smoothly connecting with the arched heat absorbing surface to form a relatively non-zero clip with respect to the horizontal mask. The endothermic side of the corner. Optionally, the non-zero angle is 30 degrees to 60 degrees, for example, 45 degrees.

Optionally, as shown in FIG. 4 and FIG. 5, the tube length and the arc length of the plurality of heat collecting tubes of the first heat collecting tube unit 131 are all set to be equal. As shown in FIG. 6 and FIG. 7, the second heat collecting tube unit 132 is provided. The tube lengths of the plurality of heat collecting tubes 1314 are set in descending order and the arc lengths are equal; in this manner, the first heat collecting tube unit 131 and the second heat collecting tube unit 132 are combined to form a set as shown in FIG. The heat chamber can facilitate the sunlight emitted from the bottom to be emitted from between adjacent heat pipes, and can effectively increase the light receiving area and improve the heat conversion efficiency of the heat collecting tube unit.

In this embodiment, as shown in FIG. 1 , FIG. 4 and FIG. 5 , the first heat collecting tube unit 131 and the second heat collecting tube unit 132 are both provided with a curved top portion 1311 and two ends connected to the curved top portion 1311 . The two support portions 1312 are respectively connected to the two support portions 1312 and the two load-bearing portions 1313 are respectively connected to the first shunt tube 11 and the second shunt tube 12, and the first heat collecting tube unit 131 and the first The two heat collecting unit 132 has a plurality of heat collecting tubes 1314 combined side by side, after combination The plurality of heat collecting tubes of the first heat collecting unit 131 and the load bearing portion 1313 of the second heat collecting unit 132 are dispersedly disposed (there is a gap between the plurality of heat collecting tubes). The heat collecting tube unit adopting the above structural design takes the first heat collecting tube unit as an example. Alternatively, firstly, the eight heat collecting tubes with the same structure are bent and combined side by side into a small small heat collecting unit unit as shown in FIG. 4 . The heat collecting unit, the supporting portion 1312 of the small heat collecting unit is welded with the curved top portion in a tightly aligned structure, and then the heat collecting tubes of the bearing portion are dispersed symmetrically as shown in FIG. The weight of the whole small heat collecting unit, in order to make the bearing part have better bearing effect, prevent the hollow heat collecting tube from being deformed, and sleeve the sleeve at the end of the bearing part, thereby making the bearing weight more stable and reliable.

As in the above principle, when the second heat collecting tube unit is arranged side by side, in order to form an inclined surface at the top to effectively prevent the loss of sunlight, the lengths of the plurality of heat collecting tubes for constituting the second heat collecting tube unit are fixed and the tube length is fixed. The length is successively decreased, and the support portion and the bearing portion are disposed in the same structure as the support portion and the load-bearing portion of the first heat collecting tube unit, and are sequentially aligned so that the nozzles of the bearing portion are respectively the first as shown in FIGS. 8 to 11 The shunt tube and the circular hole on the second shunt tube are matched, and finally combined into a heat collecting device as shown in FIG.

As shown in FIG. 4, FIG. 8 and FIG. 9, the first shunt tube 11 and the second shunt tube 12 in this embodiment are respectively disposed with a plurality of shunting units 111 spaced apart in the longitudinal direction of the tube, and the plurality of shunting units 111 and the load-bearing unit respectively The nozzles of the portion 1313 are in communication, and the plurality of flow dividing units 111 are sequentially disposed through the first heat collecting tube unit 131 and the second heat collecting tube unit 132 which are arranged side by side. The arrangement of the flow dividing unit is designed by uniformly distributing the blocking piece 1112 on the shunt tube to prevent the liquid medium from flowing directly along the length of the shunt tube, that is, the blocking piece 1112 is radially inserted into the groove formed in the shunt tube. The axial flow of the liquid medium is blocked, so that the liquid medium in the flow dividing unit of the first shunt tube 11 flows along one end of the heat collecting tube to the other end and flows into the shunting unit of the second shunt tube, in order to make the adjacent shunt The unit can be connected in series, and optionally, as shown in FIG. 10, the shunt disposed at both ends of the first shunt tube Only eight split ports 122 are provided on the unit, and the remaining split unit and the split unit on the second splitter tube are disposed on the 16 split ports 122, so that the split unit and the second on the first shunt tube 11 are The flow dividing units on the shunt tube 12 are sequentially passed through.

In order to prevent the heating molten salt from flowing in the heat collecting tube, or the heat collecting tube is required to be cleaned and drained during long-term use, as shown in FIG. 11, the plurality of dividing units 111 of the first shunt tube 11 are respectively provided with a plurality of sewage discharging tubes. 112.

In this embodiment, as shown in FIG. 8 and FIG. 9, the heat collecting device further includes a plurality of heat insulating brackets 17 for erecting the first shunt tube 11 and the second shunt tube 12, and for erecting the heat insulating bracket 17 The work channel steel 16 and the plurality of heat insulation brackets 17 are evenly arranged along the longitudinal direction of the work channel steel 16, and the support wall of the work channel steel 16 is uniformly opened with a plurality of heat insulation holes 161 along the length direction, and each heat insulation bracket The utility model comprises a support seat fastened on the top of the work channel 16 , a U-shaped card slot 171 disposed on the top of the support base, and a U-shaped card slot 171 for respectively separating the first shunt tube 11 and the second shunt tube 12 . Matching insulation cotton 172. Designed in this manner, heat from the first shunt tube 11, the second shunt tube 12, and the plurality of sets of heat collecting tubes 13 can be effectively blocked to prevent heat loss. The U-shaped card slot is a card slot and has a U shape. The above structure can be mounted in the furnace body 2 as shown in Fig. 12, and is exposed to sunlight through an opening 24 in a side wall of the furnace body 2, thereby performing well in the absence of sunlight at night. The insulation effect.

Industrial applicability

The embodiment provides a heat collecting device for a solar collector, and the heat collecting device designed by using the structure can make the liquid introduced through the inlet pipe through the shunting action of the first shunt pipe and the second shunt pipe which are erected in parallel. The medium flows along the plurality of sets of heat collecting tubes arranged side by side, and finally the heat on the surface of the sunlight irradiated by the plurality of heat collecting tubes arranged side by side is led out through the liquid medium in the heat collecting tube, thereby performing energy conversion with the external heat exchange device. In this embodiment, the lighting area is large and the heat conversion effect is The rate is high.

Claims

A heat collecting device for a solar collector, comprising:

a first shunt tube and a second shunt tube that are erected in parallel;

And a plurality of sets of heat collecting tube units for forming a sun light irradiation surface are arranged side by side along the longitudinal direction of the first shunt tube and the second shunt tube;

An inlet pipe penetrating through one of the first diverter pipe and the second diverter pipe; and an outflow pipe penetrating the other of the first diverging pipe and the second diverging pipe;

The inflow tube is configured to sequentially flow the liquid working medium into the plurality of sets of heat collecting tube units, and the outflow tube is configured to sequentially flow out the plurality of sets of heat collecting tube units for the liquid working medium.
The heat collecting device according to claim 1, wherein each of the heat collecting tube units comprises a first heat collecting tube unit and a second heat collecting tube unit;

Wherein, the first heat collecting tube unit comprises a plurality of heat collecting tubes arranged side by side in sequence to form an arched heat absorbing surface;

And the second heat collecting unit comprises a plurality of heat collecting tubes arranged side by side and then smoothly connected with the arched heat absorbing surface to form a heat absorbing surface having a non-zero angle with respect to the horizontal mask.
The heat collecting device according to claim 2, wherein the first heat collecting tube unit and the second heat collecting tube unit are each provided with a curved top portion and two supports penetratingly connected to both ends of the curved top portion And two load-bearing portions respectively connected to the two support portions, and the two load-bearing portions are respectively connected to the first and second shunt tubes.
The heat collecting device according to claim 3, wherein a gap is formed between the plurality of heat collecting tubes of the first heat collecting tube unit and the bearing portion of the second heat collecting tube unit.
The heat collecting device according to claim 3, wherein the first shunt tube and the second shunt tube are spaced apart from each other in a longitudinal direction of the tube, and the plurality of shunting units are respectively associated with the bearing portion The nozzles are connected to each other, and the plurality of branching units are sequentially disposed through the first heat collecting tube unit and the second heat collecting tube unit disposed side by side.
The heat collecting device according to claim 2, wherein a length of the tube and an arc length of the plurality of heat collecting tubes of the first heat collecting tube unit are set to be equal, and a tube of the plurality of heat collecting tubes of the second heat collecting tube unit The length is set in descending order and the arc length is equal.
The heat collecting device according to claim 5, wherein the plurality of flow dividing units of the first or second shunt tubes are respectively provided with a drain pipe.
The heat collecting device according to claim 1, further comprising a heat insulating bracket for erecting the first shunt tube and the second shunt tube, and a work channel for erecting the plurality of heat insulating brackets, wherein The heat insulating bracket is evenly disposed along the longitudinal direction of the work channel, and the support wall of the work channel is uniformly opened with a plurality of heat insulating holes along the length direction.
The heat collecting device according to claim 8, wherein each of the heat insulating brackets includes a support base fastened to a top of the work channel, a U-shaped card slot provided at a top of the support base, and a setting Insulating cotton for cooperating with the first shunt tube and the second shunt tube respectively in the U-shaped card slot.