CN112833560B - Seasonal light-gathering heat collector for heating in winter - Google Patents

Seasonal light-gathering heat collector for heating in winter Download PDF

Info

Publication number
CN112833560B
CN112833560B CN202110075998.1A CN202110075998A CN112833560B CN 112833560 B CN112833560 B CN 112833560B CN 202110075998 A CN202110075998 A CN 202110075998A CN 112833560 B CN112833560 B CN 112833560B
Authority
CN
China
Prior art keywords
light
sunlight
gathering
heat
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110075998.1A
Other languages
Chinese (zh)
Other versions
CN112833560A (en
Inventor
徐泽山
徐致远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangzhou Xilai Solar Energy Technology Co ltd
Original Assignee
Yangzhou Xilai Solar Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yangzhou Xilai Solar Energy Technology Co ltd filed Critical Yangzhou Xilai Solar Energy Technology Co ltd
Priority to CN202110075998.1A priority Critical patent/CN112833560B/en
Publication of CN112833560A publication Critical patent/CN112833560A/en
Application granted granted Critical
Publication of CN112833560B publication Critical patent/CN112833560B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/75—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems

Abstract

The invention belongs to the technical field of solar heat collectors. A seasonal light-gathering heat collector for heating in winter is characterized by comprising a light gathering groove, a reflective film arranged on the inner wall of the light gathering groove and a heat absorbing pipe arranged in the light gathering groove, wherein the light gathering groove is arranged along the east-west direction and is used for reflecting sunlight irradiated on the light gathering groove to the heat absorbing pipe; the light-gathering groove of the heat collector faces the sun; the heat collector is obliquely arranged, and the inclination angle of the heat collector is the local latitude plus A, wherein A =11 degrees, 63' -12 degrees. The invention solves the technical problem that the heat energy is wasted in non-heating seasons due to annual light condensation of the existing light-condensing heat collector.

Description

Seasonal light-gathering heat collector for heating in winter
Technical Field
The invention belongs to the technical field of solar heat collectors, and particularly relates to a seasonal light-focusing heat collector for winter heating.
Background
Solar heating is an energy-saving product for winter in the north, and the heating needs a large-area lighting area for the purpose of vigorous popularization in environmental governments at present, and the general design proportion is that the ratio of the solar heat collection area to the heating area reaches 1;4, even the solar heat collection area is larger, the requirement of user heating can be preliminarily met. The contradiction is that large-area solar energy can be used for heating in winter, when the heat energy of the large-area heat collector can not be utilized and discarded in other time of a heating season, the solar energy system equipment is aged and damaged due to long-time stop of use, and the equipment can not meet the long-term heating use.
On the other hand, solar energy is inexhaustible clean energy, the energy density of sunlight is low, the energy per square meter on the ground surface is about 500w, the temperature generated during solar thermal utilization is low, particularly, a solar thermal collector for heating is used, the utilization of concentrated solar thermal is one of better ways for solar heating, the current concentrated thermal collector generally meets the annual concentrated thermal utilization performance, namely when the direct radiation point of the sun is between the north gyrus line and the south gyrus line, the light-collecting groove of the thermal collector realizes full light collection, the corresponding solar altitude angle change range is 23 degrees 26' × 2=46 degrees 52', namely the included angle between the sunlight and the central line of the light-collecting groove is 46 degrees 52' (the connecting line between the center of the light-collecting groove and two points at the midpoint of the light-collecting groove is used as the central line of the light-collecting groove); the incidence angle range of the sunlight on the reflecting groove surface of the common fixed light-gathering groove design is about 46 degrees and 52', the incidence angle range is just the range of the annual change of the solar elevation angle, and the sunlight can be gathered on the outer wall of the heat-absorbing pipe all the year round. When heat energy is used for a heating heat collector, the heat energy of the heat collector with a large area can not be utilized and abandoned in other times in a heating season, and due to long-time stop of use, the solar system equipment is aged and damaged, and the equipment cannot meet long-term heating use.
Disclosure of Invention
The invention aims to provide a seasonal light-gathering heat collector for winter heating, which aims to solve the technical problem that the heat energy is wasted in non-heating seasons due to annual light gathering of the conventional light-gathering heat collector.
In order to solve the technical problems, the invention adopts the following technical scheme that the seasonal light-gathering heat collector for winter heating is characterized by comprising a light-gathering groove, a reflective film arranged on the inner wall of the light-gathering groove and a heat absorption pipe arranged in the light-gathering groove, wherein the light-gathering groove is arranged along the east-west direction and is used for reflecting sunlight irradiated on the light-gathering groove to the heat absorption pipe; the light-gathering groove of the heat collector faces the sun; the heat collector is obliquely arranged, the inclination angle of the heat collector is the sum of local latitude and A, and A =11 degrees, 63' -12 degrees;
(1) When the collector is located in the northern hemisphere:
when the direct sunlight point is positioned at the south latitude A, sunlight is directly irradiated in the light-gathering groove, and the included angle between the sunlight and the central line of the light-gathering groove is 0 degree, namely the sunlight is superposed with the central line of the light-gathering groove;
when the sunlight direct-emitting point is positioned at the equator, the included angle between the sunlight and the central line of the light-gathering groove is-A; when the sunlight direct-emitting point is positioned on the south return line, the included angle between the sunlight and the central line of the light-gathering groove is A; when the direct solar radiation point is positioned between the direct equator and the south return line, the included angle between sunlight and the central line of the light-gathering groove is-A-A, the total included angle is 2A, and the light-gathering efficiency of the light-gathering groove is 70-95%; (ii) a
When the direct solar radiation point is positioned between the direct equator and the return-to-north line, the light condensation efficiency of the light condensation groove is reduced to 0-40%;
the time for the light-gathering groove of the northern hemisphere heat collector to exert light-gathering efficiency is that the direct-emitting point of the sun is positioned between the equator and the south return line;
(2) When the collector is located in the southern hemisphere:
when the sunlight direct-emitting point is positioned at the north latitude A, the sunlight is directly emitted into the light-gathering groove, and the included angle between the sunlight and the central line of the light-gathering groove is 0 degree, namely the sunlight is superposed with the central line of the light-gathering groove;
when the direct-emitting point is positioned at the equator, the included angle between the sunlight and the central line of the light-gathering groove is A; when the sunlight direct-emitting point is positioned on the return-to-north line, the included angle between the sunlight and the central line of the light-gathering groove is-A; when the direct solar radiation point is positioned between the direct incidence north return line and the equator, the included angle between the sunlight and the central line of the light-gathering groove is-A-A, the total included angle is 2A, and the light-gathering efficiency of the light-gathering groove is 70-95%;
when the direct solar radiation point is positioned between the direct equator and the south return line, the light condensation efficiency of the light condensation groove is reduced to 0-40%;
the time when the light-gathering groove of the southern hemisphere heat collector exerts light-gathering efficiency is that the direct solar point is positioned between the equator and the return-to-north line.
By adopting the technical scheme, the method has the following beneficial effects:
during the process that the earth runs along with the sun, sunlight irradiates the earth surface, the earth surface shows spring, summer, autumn and winter all the year round, and when the earth revolves around the sun, the earth axis (the earth rotation axis) and the ecliptic plane (the revolution orbit plane) always keep the intersection angle of 66 degrees and 34' north-south return lines. That is, the earth is always leaning around and rotating around the sun. Thus, the earth sometimes tends to the sun in the northern hemisphere and sometimes in the southern hemisphere, and thus the position of the sun directly incident on the earth moves in the north and south directions with time. By the day of summer, sunlight is directly irradiated on the latitude line of the north latitude 23 degrees 26'. After summer solstice, the sunlight gradually moves south, and the time of the northern hemisphere irradiated by the sun gradually decreases. The weft of north latitude 23 ° 26' is the most north bound of the direct point of sunlight on the northern hemisphere, and thus this weft is called the north Return wire. The sunlight is directly irradiated on the weft of 23 degrees 26' of south latitude in winter solstice, and after the winter solstice, the sunlight starts to gradually move to the north, and is directly irradiated to the north return line again in summer solstice. The latitude line of the south latitude 23 degrees 26' is the south-most limit of the direct point of the sunlight on the south hemisphere, so the latitude line is called the south return line. The point of direct solar radiation moves back and forth between the return lines of north and south as the earth revolves.
According to the principle, the heating period is about 10 months to 5 months in the next year, the direct angle of the sun comes and goes between the equator and the south-return line, the time of autumn every year is 9 months and 23 days, the direct angle of the sun is on the equator, the incident angle of the sun moves towards the south-return line every day, the incident angle of the sun moves towards the south-return line in winter (12 months and 22 days), the incident angle of the sun moves towards the north every day, the moving included angle of the sun from the equator to the south-return line is 23 degrees and 26 degrees, the concentrating solar heat collector only needs to concentrate light at the included angle in order to meet the concentrating use in the heating season, and the installation angle of the solar heat collector is as follows: the normal incidence sunlight of the light-gathering groove is positioned on the middle line of the equator and the south return line, the light-gathering angle of the light-gathering heat collector is between-12 degrees and-12 degrees, when the sunlight moves to the north, the sunlight ray is more than 12 degrees, the light-gathering performance is gradually reduced, and the irradiation of the sunlight in summer and autumn is avoided.
The solar heat collector with seasonal condensation is characterized in that a condensation groove is formed by a plurality of continuous curved surfaces to form a groove body, a reflective film for reflecting light is covered on the upper surface of the groove body, the condensation angle of the continuous curved surfaces ranges from-12 degrees to-12 degrees, a strip-shaped heat absorption pipe is arranged in the groove body, when the sunlight incident angle ranges from-12 degrees to-12 degrees, the sunlight is converged on the heat absorption pipe, when the sunlight incident angle ranges from-12 degrees to-12 degrees, the condensation is reduced, and when the sunlight is continuously deviated, the condensation performance is lower. The light-gathering groove of the heat collector is horizontally arranged (transversely arranged) along the east-west direction, and the inclination angle theta of the heat collector is as follows: the orthographic sunlight of the light-gathering groove is positioned on the middle line of the equator and the south return line, namely the inclination angle is positioned on the latitude +12 degrees, and when the latitude of the area is 45 degrees, the inclination angle theta of the heat collector is as follows: 45 ° +12 ° =57 °.
The inclination angle theta of the heat collector is equal to the local latitude +12 degrees, so that the light-gathering grooves can gather light only in the time from autumn to spring of the next year, the sunlight irradiation in summer and autumn is avoided, and the light-gathering performance in non-heating seasons is greatly reduced.
Sunlight shines on the light-concentrating groove inner wall, through the reflector layer on the light-concentrating groove inner wall with sunshine focus on the heat-absorbing pipe outer wall, the light-concentrating groove of design only can be with the sunshine spotlight of the angle of incidence of less scope on the heat-absorbing pipe outer wall, light-concentrating groove angle of incidence scope is generally designed at 24 within ranges, when sunshine elevation angle exceeds 24 within ranges, sunshine passes through the sunshine reduction of light-concentrating groove reflection on the heat-absorbing pipe outer wall, sunshine incident angle skew is big more, the sunshine of spotlight on the heat-absorbing pipe inner wall is just less, until the light-concentrating groove does not spotlight.
In order to solve the technical problem of low light-gathering efficiency of the heat collector, the invention adopts the following technical scheme that the light-gathering groove comprises at least one circular arc groove body, the central angle of a single circular arc groove body is 30-90 degrees, and the projection length of the light-gathering groove is L; the center of the light-gathering groove is connected with the midpoint of the light-gathering groove to form a central line of the light-gathering groove; the center of the heat absorption pipe is positioned on the central line of the light gathering groove, the radius of the light gathering groove is R, and the distance between the center of the heat absorption pipe and the light gathering groove is H, R: h = (2-3): 1;
the projection length of the heat absorption tube is D, L: d = (4-7): 1.
by adopting the technical scheme, the method has the following beneficial effects:
the light-gathering curved surface is a semicircular curved surface, the curved surface is less than a quarter of circumference, the inner surface is coated with a light-reflecting coating, and sunlight is focused on the heat-absorbing pipe after being reflected.
When the incident light inclines by 12 degrees, the reflected light irradiates on the heat absorption tube after being reflected by the curved surface, the reflected light of the upper end surface of one side of the arc irradiates on the lowermost end of the heat absorption tube, the reflected light of the upper end surface of the other side of the arc irradiates on the uppermost end of the heat absorption tube, the reflecting surface is S1, and the larger the inclination angle of the reflecting light surface S1 along with the sunlight is, the smaller the S1 is.
When the sunlight is in normal incidence, the light-gathering groove can gather all light rays on the heat absorption pipe in the groove; when the sunlight inclines upwards by 12 degrees or downwards by 12 degrees, the sunlight concentration rate is about 90 percent; when the sunlight continues to incline, the sunlight concentration rate can be continuously reduced, and when the light rays incline to 15 degrees, the concentration rate is only about 40 percent.
The invention is further improved, and the heat collector also comprises a shell, wherein the light gathering groove is arranged in the shell.
In order to solve the technical problem of low light condensation efficiency caused by dust accumulation in the light condensation groove, the invention adopts the following technical scheme that the heat collector also comprises a light-transmitting cover plate, wherein the light-transmitting plate is positioned above the light condensation groove, and the light-transmitting cover plate and the shell form a closed space in a surrounding manner, so that the light transmission is ensured, the dust accumulation in the light condensation can be prevented, and the light condensation efficiency is prevented from being influenced.
The invention is further improved, the heat absorption pipe is a vacuum heat collection pipe, and water or heat conduction liquid in the pipe directly absorbs energy and is stored in the heat preservation water tank through circulation.
The invention is further improved, the heat absorption pipe is a vacuum heat collection pipe, an inner heat absorption pipe is arranged in the vacuum heat collection pipe, fins are arranged on the inner heat absorption pipe, and water or heat conducting liquid in the inner heat absorption pipe is circulated to store the heat energy absorbed by the sun into the heat insulation water tank.
The solar heat-insulation water heater is further improved, the heat absorption pipe is a metal pipe, the outer wall of the heat absorption pipe is coated with a heat absorption coating, the heat absorption pipe absorbs solar energy and heats water or heat-conducting liquid in the metal pipe, and the absorbed energy is stored into the heat-insulation water tank through circulation.
The invention is further improved, and the reflective film is a mirror surface stainless steel plate or an aluminum-based mirror surface plate.
The invention is further improved, the groove body of the light-gathering groove is made of foaming materials, and the foaming materials comprise polystyrene, phenolic resin or polyurethane.
Drawings
FIG. 1 is a schematic view of the solar operation of the present invention (collector located in northern hemisphere);
FIG. 2 is an installed perspective view of the collector of the present invention;
FIG. 3 is a side view of the installation of the collector of the present invention;
FIG. 4-1 is a view showing the relationship between the heat absorbing pipe and the light collecting groove of the heat collector of the present invention (direct sunlight);
FIG. 4-2 is a view of the relationship of the heat absorbing tubes to the concentrating trough of the collector of the present invention (with respect to direct sunlight, with a 12-degree southerly shift of sunlight);
FIG. 5-1 is a diagram showing the light condensing performance of the light condensing grooves of the heat collector of the present invention (sunlight orthographic view);
FIG. 5-2 is a diagram showing the light-condensing performance of the light-condensing groove of the heat collector of the present invention (12 degree of upward oblique incidence of sunlight);
5-3 are graphs of the light-gathering performance of the light-gathering groove of the heat collector of the invention (sunlight is obliquely emitted downwards by 12 degrees);
FIGS. 5-4 are graphs of the light concentrating performance of the light concentrating grooves of the heat collector of the present invention (sunlight obliquely shines downwards at 15 °);
fig. 6 is a sunlight operation diagram of the present invention (collector in southern hemisphere).
Detailed Description
Example 1
As shown in fig. 1, 2, 3, 4-1 and 4-2, a seasonal light-condensing heat collector 6 for winter heating comprises a shell 5, a light-condensing groove 1, a light-transmitting cover plate 4 and a heat-absorbing pipe 3.
The housing 5 is provided with a light-gathering groove 1 therein. The light-transmitting cover plate 4 is positioned above the light-gathering groove 1, and a closed space is enclosed by the light-transmitting cover plate 4 and the shell 5. The reflective membrane 2 that sets up on 1 inner wall in spotlight groove, the heat absorption pipe 3 that sets up in the spotlight groove 1, spotlight groove 1 sets up along the east-west direction. The light-gathering groove is used for reflecting the sunlight irradiated on the light-gathering groove to the heat absorption pipe.
The light gathering groove 1 comprises at least one circular arc groove body, and the central angle of each circular arc groove body is 30-90 degrees.
The center of the light-gathering groove is connected with the midpoint of the light-gathering groove to form a central line of the light-gathering groove; the center of the heat absorption pipe is positioned on the central line of the light gathering groove, the radius of the light gathering groove is R, and the distance between the center of the heat absorption pipe and the light gathering groove is H, R: h = (2-3): 1.
The projection length of light-gathering groove is L, and the projection length of heat-absorbing pipe is D, L: d = (4-7): 1.
the heat absorption pipe 3 is a vacuum heat collection pipe, and water or heat conduction liquid in the pipe directly absorbs energy and is stored in the heat preservation water tank through circulation.
The light-gathering groove of the heat collector faces the sun; the heat collector is obliquely arranged, the inclination angle of the heat collector is the local latitude plus A, and A =11 degrees, 63' -12 degrees.
(1) When the collector is located in the northern hemisphere (see fig. 5):
when the direct sunlight point is positioned at the south latitude A, sunlight is directly irradiated in the light-gathering groove, and the included angle between the sunlight and the central line of the light-gathering groove is 0 degree, namely the sunlight 8 is superposed with the central line of the light-gathering groove;
when the sunlight direct-emitting point is positioned at the equator, the included angle between the sunlight and the central line of the light-gathering groove is-A; when the sunlight direct-emitting point is positioned on the return line of the south, the included angle between the sunlight and the central line of the light-gathering groove is A; when the direct solar radiation point is positioned between the direct equator and the south return line, the included angle between sunlight and the central line of the light-gathering groove is-A-A, the total included angle is 2A, and the light-gathering efficiency of the light-gathering groove is 70-95%; (ii) a
When the direct solar radiation point is positioned between the direct equator and the return-to-north line, the light condensation efficiency of the light condensation groove is reduced to 0-40%;
the time for the light-gathering groove of the northern hemisphere heat collector to exert light-gathering efficiency is that the direct sun point is positioned between the equator and the south-return line;
(2) When the collector is located in the southern hemisphere (see fig. 6):
when the sunlight direct-emitting point is positioned at the north latitude A, the sunlight is directly emitted into the light-gathering groove, the included angle between the sunlight and the central line of the light-gathering groove is 0 degree, namely the sunlight 8' is superposed with the central line of the light-gathering groove;
when the direct-emitting point is positioned at the equator, the included angle between the sunlight and the central line of the light-gathering groove is A; when the sunlight direct-emitting point is positioned on the return-to-north line, the included angle between the sunlight and the central line of the light-gathering groove is-A; when the direct solar radiation point is positioned between the direct incidence north return line and the equator, the included angle between the sunlight and the central line of the light-gathering groove is-A-A, the total included angle is 2A, and the light-gathering efficiency of the light-gathering groove is 70-95%;
when the direct solar radiation point is positioned between the direct equator and the south-return line, the light condensation efficiency of the light condensation groove is reduced to 0-40%;
the time when the light-gathering groove of the southern hemisphere heat collector exerts light-gathering efficiency is that the direct sun point is positioned between the equator and the return-to-north line.
The reflective film is a mirror surface stainless steel plate or an aluminum mirror surface plate.
The groove body of the light-gathering groove is made of foaming materials, and the foaming materials comprise polystyrene, phenolic resin or polyurethane.
Taking northern hemisphere as an example:
taking Yangzhou city, jiangsu province as an example, the latitude of Yangzhou is 32 degrees in northern latitude. The inclination angle of the collector is 32 ° +11.63 ° =44.63 °.
When the sun is directly irradiated at the south latitude of 11.63 degrees, the sunlight is directly irradiated in the light-gathering groove.
When the direct solar equator and the south return line are between, the condensing angle of the condensing groove is 23 degrees 26' relative to the sunlight which is in the condensing groove.
As shown in fig. 5-1, 5-2, 5-3, 5-4, when the sunlight is normal, the light-gathering groove can gather all the light rays on the heat-absorbing pipes in the groove; when the sunlight inclines upwards by 12 degrees or downwards by 12 degrees, the sunlight concentration rate is about 90 percent; when the sunlight continues to incline, the sunlight concentration rate is continuously reduced, and when the light rays incline to 15 degrees, the concentration rate is only about 40 percent.
Taking the beijing urban as an example, the beijing urban latitude: north latitude 39.9 deg. The inclination angle of the collector is 39.9 ° +12 ° =51.9 °. 11.63 degree
When the sun is directly irradiated at 12 degrees south latitude, the sunlight is directly irradiated in the light-gathering grooves. When the sun is between the direct equator and the return line of south, the sun is directly irradiated in the light-gathering groove, and the light-gathering angle of the light-gathering groove is 24 degrees.
Example 2
Different from the embodiment 1, the heat absorption tube is a vacuum heat collection tube, an inner heat absorption tube is arranged in the vacuum heat collection tube, fins are arranged on the inner heat absorption tube, and water or heat conducting liquid in the inner heat absorption tube stores heat energy absorbed by the sun into the heat preservation water tank through circulation.
Example 3
Different from the embodiment 1, the heat absorption pipe is a metal pipe, the outer wall of the pipe is coated with a heat absorption coating, the heat absorption pipe absorbs solar energy and heats water or heat conduction liquid in the metal pipe, and the absorbed energy is stored in the heat preservation water tank through circulation.
Example 4
As shown in fig. 6, unlike embodiment 1, the use city of the heat collector is located in the southern hemisphere, and the heat collector is disposed obliquely to the north.
Taking the Australian capital Sydney as an example, the central coordinate of the Sydney city is 33 degrees 55' in south latitude. The inclination angle of the collector is 33 ° 55'+12 ° =45 ° 55'.
Taking brazilian capital brazilian as an example, the urban center coordinate of basili is 15 degrees 47' south latitude. The inclination angle of the heat collector is 15 ° + 47'+12 ° =27 ° 47'.

Claims (8)

1. A seasonal light-gathering heat collector for heating in winter is characterized by comprising a light gathering groove, a reflective film arranged on the inner wall of the light gathering groove and a heat absorbing pipe arranged in the light gathering groove, wherein the light gathering groove is arranged along the east-west direction and is used for reflecting sunlight irradiated on the light gathering groove to the heat absorbing pipe; the light-gathering groove of the heat collector faces the sun; the heat collector is obliquely arranged, the inclination angle of the heat collector is the sum of local latitude and A, and A =11 degrees, 63' -12 degrees;
the light-gathering groove comprises at least one circular arc groove body, the central angle of each circular arc groove body is 30-90 degrees, and the projection length of the light-gathering groove is L;
the center of the heat absorption pipe is positioned on the central line of the light gathering groove, the radius of the light gathering groove is R, and the distance between the center of the heat absorption pipe and the light gathering groove is H, R: h = (2-3): 1; the projection length of the heat absorption tube is D, L: d = (4-7): 1;
(1) When the collector is located in the northern hemisphere:
when the direct sunlight point is positioned in the south latitude A, sunlight is normally irradiated in the light-gathering groove, and the included angle between the sunlight and the central line of the light-gathering groove is 0 degree, namely the sunlight is superposed with the central line of the light-gathering groove;
when the sunlight direct-emitting point is positioned at the equator, the included angle between the sunlight and the central line of the light-gathering groove is-A; when the sunlight direct-emitting point is positioned on the return line of the south, the included angle between the sunlight and the central line of the light-gathering groove is A; when the direct solar radiation point is positioned between the direct equator and the south return line, the included angle between sunlight and the central line of the light-gathering groove is-A-A, the total included angle is 2A, and the light-gathering efficiency of the light-gathering groove is 70-95%;
when the direct solar radiation point is positioned between the direct equator and the return-to-north line, the light condensation efficiency of the light condensation groove is reduced to 0-40%;
the time for the light-gathering groove of the northern hemisphere heat collector to exert light-gathering efficiency is that the direct sun point is positioned between the equator and the south-return line;
(2) When the collector is located in the southern hemisphere:
when the sunlight direct-emitting point is positioned at the north latitude A, the sunlight is directly emitted into the light-gathering groove, and the included angle between the sunlight and the central line of the light-gathering groove is 0 degree, namely the sunlight is superposed with the central line of the light-gathering groove;
when the direct-emitting point is positioned at the equator, the included angle between the sunlight and the central line of the light-gathering groove is A; when the sunlight direct-emitting point is positioned on the return line of north, the included angle between the sunlight and the central line of the light-gathering groove is-A; when the direct solar radiation point is positioned between the direct incidence north return line and the equator, the included angle between the sunlight and the central line of the light-gathering groove is-A-A, the total included angle is 2A, and the light-gathering efficiency of the light-gathering groove is 70-95%;
when the direct solar radiation point is positioned between the direct equator and the south-return line, the light condensation efficiency of the light condensation groove is reduced to 0-40%;
the time when the light-gathering groove of the southern hemisphere heat collector exerts light-gathering efficiency is that the direct solar point is positioned between the equator and the return-to-north line.
2. The seasonal light concentrating collector for winter heating according to claim 1, further comprising a housing in which the light concentrating trough is disposed.
3. The seasonal light concentrating collector for winter heating according to claim 2, further comprising a light transmitting cover plate, wherein the light transmitting plate is positioned above the light concentrating groove, and a closed space is defined by the light transmitting cover plate and the shell.
4. The seasonal light concentrating collector for winter heating according to claim 2, wherein the heat absorption pipes are evacuated collector pipes, and water or heat transfer fluid in the pipes directly absorbs energy and is stored in the thermal insulation water tank by circulation.
5. The collector of claim 2, wherein the heat absorbing pipe is a vacuum heat collecting pipe, an inner heat absorbing pipe is arranged in the vacuum heat collecting pipe, fins are arranged on the inner heat absorbing pipe, and the heat energy absorbed by the sun is stored in the heat preservation water tank by circulating water or heat conducting liquid in the inner heat absorbing pipe.
6. The collector of claim 2, wherein the heat absorbing pipe is a metal pipe, a heat absorbing coating is coated on an outer wall of the pipe, the heat absorbing pipe absorbs solar energy and heats water or heat transfer fluid in the metal pipe, and the absorbed energy is stored in the thermal insulation water tank by circulation.
7. The seasonal concentrating collector for winter heating according to claim 1, wherein the reflective film is a mirror stainless steel plate or an aluminum mirror plate.
8. The collector of claim 1, wherein the trough body of the light-gathering trough is made of a foamed material, and the foamed material comprises polystyrene, phenolic resin or polyurethane.
CN202110075998.1A 2021-01-20 2021-01-20 Seasonal light-gathering heat collector for heating in winter Active CN112833560B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110075998.1A CN112833560B (en) 2021-01-20 2021-01-20 Seasonal light-gathering heat collector for heating in winter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110075998.1A CN112833560B (en) 2021-01-20 2021-01-20 Seasonal light-gathering heat collector for heating in winter

Publications (2)

Publication Number Publication Date
CN112833560A CN112833560A (en) 2021-05-25
CN112833560B true CN112833560B (en) 2023-02-28

Family

ID=75928992

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110075998.1A Active CN112833560B (en) 2021-01-20 2021-01-20 Seasonal light-gathering heat collector for heating in winter

Country Status (1)

Country Link
CN (1) CN112833560B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101699191A (en) * 2009-10-21 2010-04-28 北京理工大学 Integrally packaged type solar heat collector with combined curved surface for light collection and vacuum tube for heat collection
CN102032693B (en) * 2010-12-30 2012-11-28 上海极特实业有限公司 Safety protection device for solar heat exchanging system
CN106065675B (en) * 2016-06-17 2018-09-18 北京理工大学 A kind of full passive type solar energy heating wall of double heat pipes cycles of micro- optically focused
CN206944508U (en) * 2017-04-28 2018-01-30 杭州凌萤科技有限公司 Adjusting heat collecting amount camber reflection light-concentrating solar heat-collection device
CN110375444B (en) * 2019-07-09 2024-02-20 清华大学 Solar reflecting plate capable of preventing summer overheat

Also Published As

Publication number Publication date
CN112833560A (en) 2021-05-25

Similar Documents

Publication Publication Date Title
CN103370581B (en) Solar heat concentrator apparatus, system and method
CN201259343Y (en) Multi-surface compound wire focusing groove type solar medium and high temperature heat collection and heat storage system
CN106839456B (en) Composite multi-curved-surface groove type solar concentrating collector with automatic defrosting function
CN201983472U (en) Solar heat collector equipped with compound parabolic collector concentrator
Kalogirou Nontracking solar collection technologies for solar heating and cooling systems
CN201093775Y (en) Glass vacuum metal tube type solar heat collector
WO2014026610A1 (en) Solar energy gathering system
Jesko Classification of solar collectors
CN104143954A (en) Novel tracking-free condenser suitable for solar photovoltaic system and photothermic system
Singh et al. A review on solar energy collection for thermal applications
CN101169286A (en) Reflection type straightforward focusing high temperature solar energy heat collector
CN112833560B (en) Seasonal light-gathering heat collector for heating in winter
CN208365843U (en) A kind of equal receptions escape half-angle solar light-condensing and heat-collecting device
CN2674358Y (en) Solar heat collector
CN2580363Y (en) Basically fixed high power focusing solar heat collector
CN204880790U (en) Exempt from to trail compound paraboloid condenser of solar energy
CN204068849U (en) A kind of Novel free tracking mode concentrator being applicable to photovoltaic and photo-thermal
KR20210066461A (en) Parabolic trough concentrator type solar thermal energy system capable of tracking solar using temperature sensor
CN201945061U (en) Fresnel intermediate-high temperature solar heat-collecting device
CN201584928U (en) Slot-type photovoltaic concentrator device
CN2557882Y (en) Plane board type solar energy focusing heat-collector
CN215372991U (en) Light-gathering solar heat collecting pipe
CN2232129Y (en) High effective condensing type solar heat collector
CN115603657B (en) Non-tracking low-magnification concentrating solar power generation device and design method
CN108397920A (en) It is a kind of efficiently to exempt to track optically focused flat solar energy heat collector

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant