CN116915166A - Method and device for improving power generation capacity of double-sided photovoltaic panel - Google Patents
Method and device for improving power generation capacity of double-sided photovoltaic panel Download PDFInfo
- Publication number
- CN116915166A CN116915166A CN202310846070.8A CN202310846070A CN116915166A CN 116915166 A CN116915166 A CN 116915166A CN 202310846070 A CN202310846070 A CN 202310846070A CN 116915166 A CN116915166 A CN 116915166A
- Authority
- CN
- China
- Prior art keywords
- double
- sided photovoltaic
- photovoltaic panel
- reflecting plate
- power generation
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
-
- 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
- F24S23/80—Arrangements for concentrating solar-rays for solar heat collectors with reflectors having discontinuous faces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/10—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface
- F24S25/13—Profile arrangements, e.g. trusses
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/10—Cleaning arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
A method for improving the power generation capacity of a double-sided photovoltaic panel is characterized in that the double-sided photovoltaic panel is mounted in a suspended mode, and solar rays are reflected to the bottom surface of the double-sided photovoltaic panel by utilizing a bottom reflecting plate mounted at the bottom of the double-sided photovoltaic panel and a front reflecting plate and a rear reflecting plate mounted at the front end and the rear end of the double-sided photovoltaic panel respectively so as to improve the utilization rate of sunlight. According to the utility model, the bottom reflecting plate arranged at the bottom of the double-sided photovoltaic plate, and the front reflecting plate and the rear reflecting plate respectively arranged at the front end and the rear end of the double-sided photovoltaic plate are utilized to reflect solar rays to the bottom surface of the double-sided photovoltaic plate, so that the utilization rate of sunlight is improved, and the power generation efficiency of the double-sided photovoltaic plate is greatly improved.
Description
Technical Field
The utility model relates to the technical field of solar photovoltaic, in particular to a method and a device for improving the power generation capacity of a double-sided photovoltaic panel.
Background
Photovoltaic solar energy is used as a clean energy source, the proportion of the energy source is increased, and the global construction of large-scale solar photovoltaic power stations is a trend. Photovoltaic panels are the direct core component of solar energy absorption in photovoltaic devices. In recent years, a technology of a double-sided photovoltaic panel has been developed, wherein a back electrode of the photovoltaic panel is also manufactured into a light-transmitting grid line, so that the back photovoltaic panel also has a certain light-absorbing capacity.
With this capability of the bifacial photovoltaic panel, higher power generation gains can be obtained by projecting the upper sunlight through the reflecting means onto the lower back of the photovoltaic panel, and some techniques related to the combination of reflecting means with bifacial photovoltaic panels are described in the literature, for example:
1. a double-sided power generation photovoltaic module; application number: CN201720121136.7; applicants: li Kang; wang; summary: a double-sided power generation photovoltaic module. The utility model provides a double-sided power generation photovoltaic module, which is low in light receiving amount and low in power generation amount, and aims at the problems, and comprises a double-sided photovoltaic panel (1) and a bracket system (2), and is characterized in that: the double-sided photovoltaic module comprises a double-sided photovoltaic panel (1), and is characterized by further comprising an arc-shaped reflecting plate (3) used for reflecting light onto the double-sided photovoltaic panel (1), wherein the concave surface of the arc-shaped reflecting plate (3) faces the double-sided photovoltaic panel (1) and the bottom edge of the arc-shaped reflecting plate (3) is connected with the bottom edge of the double-sided photovoltaic panel (1), the bottom edge length of the arc-shaped reflecting plate (3) is greater than or equal to the bottom edge length of the double-sided photovoltaic panel (1), and the bracket system (2) is used for supporting the double-sided photovoltaic panel (1) and the arc-shaped reflecting plate (3).
2. A heterojunction double-sided photovoltaic module; application number: CN202020514653.2; applicants: jiangsu Dong photovoltaic technologies Co., ltd.; abstract: a heterojunction double-sided photovoltaic module relates to the technical field of double-sided photovoltaic modules. The utility model comprises a double-sided photovoltaic panel, wherein a bracket is arranged at the Fu Bande part of the double-sided light; the back of the bottom of the double-sided photovoltaic panel is rotationally connected with a first reflecting plate; guide frames are arranged on two sides of the top of the back of the double-sided photovoltaic panel; the bottom end of the guide frame is fixedly connected with the support; the opposite surfaces of the two guide frames are in sliding fit with guide blocks; a second reflecting plate is slidably matched between the two guide blocks. According to the utility model, the guide frame, the first reflecting plate, the guide block and the second reflecting plate are matched, the support is used for supporting and placing the first reflecting plate, so that light rays irradiated on the ground can be directly reflected by the first reflecting plate, and the second reflecting plate is used for reflecting light rays overflowing from the front surface of the double-sided photovoltaic plate to the back surface of the double-sided photovoltaic plate for supplementing light, so that the power generation efficiency of the photovoltaic assembly can be improved, and the practicability is higher.
3. A double-sided photovoltaic module intensifying system; application number: CN202121779554.8; applicants: new energy science and technology share company in Jiangsu; summary: a bifacial photovoltaic module intensifying system comprising: the double-sided photovoltaic modules are arranged at intervals along the length direction of the support piece, and the double-sided photovoltaic modules and the support piece are arranged at preset angles; and the reflecting assemblies are connected with the supporting pieces, and one side, close to the back surface, of each double-sided photovoltaic assembly is provided with the reflecting assemblies, so that the back surfaces of the double-sided photovoltaic assemblies are subjected to light supplementing. According to the double-sided photovoltaic module light increasing system, the reflection assemblies are added in the front-back gaps of the double-sided photovoltaic modules of the traditional inclination angle flat single-shaft support, the back sides of the double-sided photovoltaic modules are subjected to light supplementing, and the overall power generation efficiency of the double-sided photovoltaic modules is effectively improved.
In the prior art, although the reflecting mechanism is arranged to collect solar rays, when the sun walks to the back of the photovoltaic panel at an angle, the solar energy absorbed by the photovoltaic panel is greatly reduced, and the power generation capacity of the double-sided photovoltaic panel is limited.
Disclosure of Invention
The utility model aims to provide a method and a device for improving the power generation capacity of a double-sided photovoltaic panel, which utilize a bottom reflecting plate arranged at the bottom of the double-sided photovoltaic panel, and a front reflecting plate and a rear reflecting plate respectively arranged at the front end and the rear end of the double-sided photovoltaic panel to reflect solar rays to the bottom surface of the double-sided photovoltaic panel so as to improve the utilization rate of sunlight and greatly improve the power generation efficiency of the double-sided photovoltaic panel.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a method for improving the power generation capacity of a double-sided photovoltaic panel is characterized in that the double-sided photovoltaic panel is mounted in a suspended mode, and solar rays are reflected to the bottom surface of the double-sided photovoltaic panel by utilizing a bottom reflecting plate mounted at the bottom of the double-sided photovoltaic panel and a front reflecting plate and a rear reflecting plate mounted at the front end and the rear end of the double-sided photovoltaic panel respectively so as to improve the utilization rate of sunlight.
The front reflecting plate and the rear reflecting plate are utilized to guide obliquely-projected solar rays to the lower part of the double-sided photovoltaic plate, and the light rays are reflected to the bottom surface of the double-sided photovoltaic plate by the reflecting action of the bottom reflecting plate, so that the generated energy of the double-sided photovoltaic plate is increased.
The middle part of the front reflecting plate is hinged with the upright post B, and the lower end of the upright post B is connected with the base B.
The middle part of the rear reflecting plate is hinged with a stand column C, and the lower end of the stand column C is connected with a base C.
The front reflecting plate and the rear reflecting plate which are hinged can adjust the inclination angle according to the irradiation angle of sunlight, so that light can be better guided into the bottom surface of the double-sided photovoltaic panel.
The front end of the front reflecting plate is a cambered surface.
The rear end of the rear reflecting plate is a cambered surface.
The cambered surface parts at the end parts of the front reflecting plate and the rear reflecting plate can effectively improve the capability of collecting sunlight, so that more sunlight enters the bottom surface of the double-sided photovoltaic plate through the reflection of the cambered surfaces.
Motors are arranged in the base B and the base C, a worm is arranged on a motor rotating shaft and meshed with a worm wheel, a gear A coaxial with the worm wheel is connected with a gear B through a chain, and the gear B is connected with a front reflecting plate or a rear reflecting plate through a rotating shaft.
The motor drives the front and rear reflecting plates to rotate as follows: the motor drives the worm to rotate, the worm drives the engaged worm wheel to rotate, the worm wheel is fixed on the first shaft through the flat key, the gear A is further arranged on the first shaft and fixed on the first shaft through the flat key, after the worm wheel rotates, the gear A also rotates simultaneously, the gear B above is driven to rotate through the chain, the gear B is fixed on the second shaft through the flat key, the second shaft is further fixedly connected with the front reflecting plate and the rear reflecting plate, and therefore the motor is finally driven to rotate, and the inclination angle is changed. The meshing locking effect of the worm gear can prevent the locking of the mechanism from being operated under the condition that the motor does not rotate, and the front reflecting plate and the rear reflecting plate are prevented from automatically changing the inclination angle under the action of gravity.
The double-sided photovoltaic panel is supported above the ground by two upright posts A and reinforced by diagonal braces.
The bottom reflecting plate is parallel to the double-sided photovoltaic plate, and the distance from the back surface of the double-sided photovoltaic plate is 600-1000mm.
The working principle of the utility model is illustrated by the accompanying drawings:
the device is in a state of the device in the primary stage, the angle between the sun irradiation light and the photovoltaic panel is overlarge, the capability of obtaining sunlight on the front surface of the photovoltaic panel is low, at the moment, the sunlight is refracted to the back surface of the photovoltaic panel mainly by virtue of the rear reflecting plate facing the sun light, and part of the sun light is guided into the back surface of the photovoltaic panel through the front reflecting plate, so that the energy absorption gain of the back surface of the photovoltaic panel is realized.
The solar energy is reflected to the back of the photovoltaic panel by the front reflecting plate mainly depending on the solar rays facing the front reflecting plate, and part of the solar rays are led into the back of the photovoltaic panel through the rear reflecting plate, so that the energy absorption gain of the back of the photovoltaic panel is realized.
The utility model has the advantages that:
1. the utility model is applied to a double-sided photovoltaic device, can realize the power generation gain of a double-sided photovoltaic panel, and effectively increases the utilization efficiency of sunlight under the condition of not increasing the occupied area and the area of the photovoltaic panel.
2. The reflecting plates are all inclined planes, and have the following advantages: when the rain weather is met, the inclined plane can naturally drain rainwater, so that the phenomenon of water accumulation is avoided; secondly, when foreign matters fall on the arc top surface, the foreign matters are easy to roll off or fall along with wind blowing or rain discharging, and the self-cleaning of the shed roof is facilitated.
Description of the drawings:
FIG. 1 is a front view block diagram of the present utility model;
FIG. 2 is a schematic view of the appearance of a double-sided photovoltaic panel and its support structure;
FIG. 3 is a schematic view of the device in the state of the sun in the initial stage;
FIG. 4 is a schematic view of the state of the device during sunset phase of the sun;
FIG. 5 is a schematic view of a driving structure for angle conversion of front and rear reflection plates;
the component names in the drawings are as follows: 1-a double-sided photovoltaic panel; 11-stand column A; 12-diagonal bracing; 2-bottom reflecting plate; 3-front reflecting plate; 31-an upright B; 32-a base B; 4-a rear reflection plate; 41-upright C; 42-base C; 51-a motor; 52-worm; 53-worm gear; 54-gear a; 55-chain; 56-gear B.
Detailed Description
Example 1
A method for improving the power generation capacity of a double-sided photovoltaic panel is characterized in that the double-sided photovoltaic panel 1 is mounted in a suspended manner, and solar rays are reflected to the bottom surface of the double-sided photovoltaic panel 1 by utilizing a bottom reflecting plate 2 mounted at the bottom of the double-sided photovoltaic panel 1 and a front reflecting plate 3 and a rear reflecting plate 4 respectively mounted at the front end and the rear end of the double-sided photovoltaic panel 1 so as to improve the utilization rate of sunlight.
The middle part of the front reflecting plate 3 is hinged with the upright post B31, and the lower end of the upright post B31 is connected with the base B32.
The middle part of the rear reflecting plate 4 is hinged with a stand column C41, and the lower end of the stand column C41 is connected with a base C42.
The front end of the front reflecting plate 3 is a cambered surface.
The rear end of the rear reflecting plate 4 is a cambered surface.
The motor 51 is installed in the base B32 and the base C42, a worm 52 is installed on the rotating shaft of the motor 51, the worm 52 is meshed with a worm wheel 53, a gear A54 coaxial with the worm wheel 53 is connected with a gear B56 through a chain 55, and the gear B56 is connected with the front reflecting plate 3 or the rear reflecting plate 4 through the rotating shaft.
The double-sided photovoltaic panel 1 is supported above the ground by two upright posts A11 and is reinforced by diagonal braces 12.
The bottom reflecting plate 2 is parallel to the double-sided photovoltaic plate 1, and the distance from the back of the double-sided photovoltaic plate 1 is 800mm.
Example 2
A method for improving the power generation capacity of a double-sided photovoltaic panel is characterized in that the double-sided photovoltaic panel 1 is mounted in a suspended manner, and solar rays are reflected to the bottom surface of the double-sided photovoltaic panel 1 by utilizing a bottom reflecting plate 2 mounted at the bottom of the double-sided photovoltaic panel 1 and a front reflecting plate 3 and a rear reflecting plate 4 respectively mounted at the front end and the rear end of the double-sided photovoltaic panel 1 so as to improve the utilization rate of sunlight.
The front end of the front reflecting plate 3 is a plane.
The rear end of the rear reflection plate 4 is a plane.
The double-sided photovoltaic panel 1 is supported above the ground by two upright posts A11 and is reinforced by diagonal braces 12.
The bottom reflecting plate 2 is parallel to the double-sided photovoltaic plate 1, and the distance from the back of the double-sided photovoltaic plate 1 is 800mm.
Example 3
A method for improving the power generation capacity of a double-sided photovoltaic panel is characterized in that the double-sided photovoltaic panel 1 is mounted in a suspended manner, and solar rays are reflected to the bottom surface of the double-sided photovoltaic panel 1 by utilizing a bottom reflecting plate 2 mounted at the bottom of the double-sided photovoltaic panel 1 and a front reflecting plate 3 and a rear reflecting plate 4 respectively mounted at the front end and the rear end of the double-sided photovoltaic panel 1 so as to improve the utilization rate of sunlight.
The front end of the front reflecting plate 3 is a cambered surface.
The rear end of the rear reflecting plate 4 is a cambered surface.
The double-sided photovoltaic panel 1 is supported above the ground by two upright posts A11 and is reinforced by diagonal braces 12.
The bottom reflecting plate 2 is parallel to the double-sided photovoltaic plate 1, and the distance from the back of the double-sided photovoltaic plate 1 is 800mm.
Application examples:
the double-sided photovoltaic panel is a double-sided photovoltaic panel product of the department of crystal energy Co., ltd, the model is JKM540M-72HL4BDVP, the area of the photovoltaic panel is 2 square meters, and the test site is: zhaoqing in Guangdong of China, 5 months, all day temperature: 24-31 ℃;
the power of the driving motor is 100W, the total daily accumulated rotation time is 10min, and the motor efficiency is about 80%;
therefore, the double-sided photovoltaic panel power generation device has the advantages that the generated energy is obviously improved, and even if the consumed electric quantity of the driving motor is subtracted, the obtained power generation gain is still considerable.
Claims (8)
1. A method for improving the power generation capacity of a double-sided photovoltaic panel, which is characterized by comprising the following steps: the double-sided photovoltaic panel (1) is mounted in a suspended mode, and solar rays are reflected to the bottom surface of the double-sided photovoltaic panel (1) by utilizing the bottom reflecting plate (2) mounted at the bottom of the double-sided photovoltaic panel (1) and the front reflecting plate (3) and the rear reflecting plate (4) mounted at the front end and the rear end of the double-sided photovoltaic panel (1) respectively so as to improve the utilization rate of sunlight.
2. The method for improving the power generation capacity of a double-sided photovoltaic panel according to claim 1, wherein: the middle part of the front reflecting plate (3) is hinged with the upright post B (31), and the lower end of the upright post B (31) is connected with the base B (32).
3. The method for improving the power generation capacity of a double-sided photovoltaic panel according to claim 1, wherein: the middle part of the rear reflecting plate (4) is hinged with the upright post C (41), and the lower end of the upright post C (41) is connected with the base C (42).
4. The method for improving the power generation capacity of a double-sided photovoltaic panel according to claim 1, wherein: the front end of the front reflecting plate (3) is a cambered surface.
5. The method for improving the power generation capacity of a double-sided photovoltaic panel according to claim 1, wherein: the rear end of the rear reflecting plate (4) is a cambered surface.
6. A method of increasing the power generation capacity of a double-sided photovoltaic panel according to claim 2 or 3, characterized in that: the motor (51) is arranged in the base B (32) and the base C (42), the worm (52) is arranged on the rotating shaft of the motor (51), the worm (52) is meshed with the worm wheel (53), the gear A (54) coaxial with the worm wheel (53) is connected with the gear B (56) through the chain (55), and the gear B (56) is connected with the front reflecting plate (3) or the rear reflecting plate (4) through the rotating shaft.
7. The method for improving the power generation capacity of a double-sided photovoltaic panel according to claim 1, wherein: the double-sided photovoltaic panel (1) is supported above the ground by two upright posts A (11) and is reinforced by diagonal braces (12).
8. The method for improving the power generation capacity of a double-sided photovoltaic panel according to claim 1, wherein: the bottom reflecting plate (2) is parallel to the double-sided photovoltaic plate (1), and the distance from the back of the double-sided photovoltaic plate (1) is 600-1000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310846070.8A CN116915166A (en) | 2023-07-11 | 2023-07-11 | Method and device for improving power generation capacity of double-sided photovoltaic panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310846070.8A CN116915166A (en) | 2023-07-11 | 2023-07-11 | Method and device for improving power generation capacity of double-sided photovoltaic panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116915166A true CN116915166A (en) | 2023-10-20 |
Family
ID=88357492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310846070.8A Pending CN116915166A (en) | 2023-07-11 | 2023-07-11 | Method and device for improving power generation capacity of double-sided photovoltaic panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116915166A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7780831B1 (en) * | 2025-03-13 | 2025-12-05 | 泰生 小山 | Indoor solar power generation building and photoelectric converter |
-
2023
- 2023-07-11 CN CN202310846070.8A patent/CN116915166A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7780831B1 (en) * | 2025-03-13 | 2025-12-05 | 泰生 小山 | Indoor solar power generation building and photoelectric converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106339009B (en) | Double-sided double-glass solar cell panel tracking bracket | |
| CN104410356A (en) | Solar tracking and concentrating power generation system | |
| CN116915166A (en) | Method and device for improving power generation capacity of double-sided photovoltaic panel | |
| CN211606462U (en) | High-performance flat single-shaft photovoltaic tracking support structure for double-sided double-glass photovoltaic panel | |
| CN113819439B (en) | An energy-saving and environmentally friendly multi-energy street lamp device | |
| CN114430248A (en) | Photovoltaic power generation support system and method capable of automatically tracking sunlight turnover | |
| CN211880341U (en) | Flexible bending type solar photovoltaic module | |
| CN204271986U (en) | A kind of solar energy tracking Blast Furnace Top Gas Recovery Turbine Unit (TRT) | |
| CN113587027A (en) | Multifunctional device of traffic light of solar street lamp | |
| CN220190765U (en) | Distributed photovoltaic power generation device | |
| CN212034046U (en) | Photovoltaic power plant with adjustable inclination angle | |
| CN222736060U (en) | Angle adjustment device for photovoltaic support | |
| CN211127681U (en) | A large-span photovoltaic support for photovoltaic power station | |
| CN201378770Y (en) | Novel electric push rod for photovoltaic solar tracking power station | |
| CN208849722U (en) | A photovoltaic module support device | |
| CN221900779U (en) | Photovoltaic bracket and photovoltaic module | |
| CN223744648U (en) | Adjustable photovoltaic panel | |
| CN219780052U (en) | Hybrid solar cell panel and hybrid solar power generation device | |
| CN219931350U (en) | Solar photovoltaic curtain wall | |
| CN223472211U (en) | Supporting device capable of realizing angle adjustment of photovoltaic panel | |
| CN214900781U (en) | Environment-friendly new forms of energy photovoltaic board power generation facility | |
| CN221408741U (en) | A solar photovoltaic panel fixing support device | |
| CN216042234U (en) | Solar photovoltaic roof with adjustable angle | |
| CN221103240U (en) | Photovoltaic power generation support frame with multi-angle is adjusted | |
| CN221748304U (en) | A rooftop solar bracket |
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 |