Glass curtain wall structure

Abstract

The present invention provides a glass curtain wall structure, including an inner layer of glass, an outer layer of glass and an isolation strip, wherein the inner layer of glass is transparent photovoltaic glass, a photovoltaic panel is arranged on the side of the inner layer of glass away from the outer layer of glass, the outer layer of glass is light-transmitting tempered glass, a gap is provided between the inner layer of glass and the outer layer of glass, the isolation strip is located between the inner layer of glass and the outer layer of glass, and the isolation strip, the inner layer of glass and the outer layer of glass enclose a closed cavity, a plurality of air inlets are arranged at the bottom of the cavity, the cavity is connected to a gas supply device through the air inlets, and the gas supply device is used to provide an inert gas into the cavity. By isolating the cavity, the thermal insulation effect of the wall can be effectively improved, and when there is no heating and cooling demand indoors, the inert gas is provided into the cavity through the gas supply device, which can reduce the attenuation of the performance of the inner layer of glass and improve its service life.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, and in particular to a glass curtain wall structure. Background Art

[0002] In recent years, my country's construction industry energy consumption, industrial energy consumption, and transportation energy consumption have become one of the three major "energy sources". According to statistics, construction energy consumption accounts for about 30% of the total social energy consumption. Together with the consumption of building materials production process, the total social energy consumption accounts for 46% to 47%, and air conditioning energy consumption accounts for 40% to 50% of building energy consumption. Existing traditional building materials have poor thermal insulation performance and cannot provide functions such as heat, lighting and air exchange. When glass curtain walls are combined with buildings, the thermal insulation is even worse and the building energy consumption is higher.

[0003] Photovoltaic curtain wall is an important application scope of solar photovoltaic building integration. It combines photovoltaic power generation technology and curtain wall technology. It is a high-tech product and represents the latest development direction of solar building integration technology in the world. With the progress of the times and the development of science and technology, the field of construction has undergone profound changes, and more new energy-saving and environmentally friendly technologies and new materials have emerged in an endless stream. As a new type of glass curtain wall, the breathing curtain wall has been valued by scholars at home and abroad for its outstanding environmental protection and energy-saving performance. Many researchers have conducted a lot of fruitful research, and many mature technologies have been applied to practice. Breathing curtain wall refers to a double-layer glass with a gap between the two layers of glass. The glass interlayer is used to achieve the purpose of heating air in winter and cooling in summer, that is, a curtain wall that can "breathe" autonomously. When there is no heating demand indoors, due to the lack of air circulation between the glass interlayers, the breathing curtain wall is easily reduced in service life under long-term exposure to light, which in turn affects the thermal insulation performance of the breathing curtain wall. In addition, the low light transmittance of most photovoltaic curtain walls leads to obstruction of indoor lighting, and indoor lighting needs to be provided, which brings unnecessary energy consumption. Summary of the invention

[0004] The object of the present invention is to provide a glass curtain wall structure with good heat insulation performance and high light transmittance. When there is no heating and cooling demand in the room, the attenuation of the performance of the inner layer of glass can be reduced and its service life can be increased.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a glass curtain wall structure, including an inner layer of glass, an outer layer of glass and an isolation strip, the inner layer of glass is transparent photovoltaic glass, a photovoltaic panel is arranged on the side of the inner layer of glass away from the outer layer of glass, the outer layer of glass is light-transmitting tempered glass, there is a gap between the inner layer of glass and the outer layer of glass, the isolation strip is located between the inner layer of glass and the outer layer of glass, and the isolation strip, the inner layer of glass and the outer layer of glass enclose a closed cavity, a plurality of air inlets are arranged at the bottom of the cavity, the cavity is connected to a gas supply device through the air inlet, and the gas supply device is used to provide inert gas into the cavity.

[0006] Optionally, the top of the cavity is further provided with a first air outlet and a second air outlet, the first air outlet is located on a side of the isolation strip close to the inner glass and passes through the isolation strip, the second air outlet is located on a side of the isolation strip close to the outer glass and passes through the isolation strip, the air inlet is located on a side of the isolation strip close to the inner glass and passes through the isolation strip, and the air inlet is also connected to the room;

[0007] When there is no heating or cooling demand in the room, the first air outlet and the second air outlet are both closed, the air inlet is opened, and the gas supply device provides inert gas to the cavity;

[0008] When the temperature of the room is higher than the temperature of the outside, the second air outlet is closed, the first air outlet and the air inlet are both opened, and the room is connected with the cavity so that the air in the room enters the cavity;

[0009] When the indoor temperature is lower than the outdoor temperature, the first air outlet is closed, the second air outlet and the air inlet are both opened, and the cold air in the room enters the cavity and squeezes out the hot air in the cavity from the second air outlet.

[0010] Optionally, the second air outlet is also connected to a negative pressure suction device, and when there is no heating demand in the room, the negative pressure suction device draws out the air in the cavity through the second air outlet.

[0011] Optionally, the air inlet, the first air outlet and the second air outlet are all provided with an automatic control valve, a flow regulating valve and a filter.

[0012] Optionally, the photovoltaic cell panel is a silicon-based thin-film photovoltaic cell panel.

[0013] Optionally, the photovoltaic glass contains halide perovskite.

[0014] Optionally, the surface of the outer glass is covered with a low-reflection coating.

[0015] Optionally, the gap between the inner layer of glass and the outer layer of glass is between 6 mm and 20 mm.

[0016] Optionally, sealant is filled between the inner layer of glass, the outer layer of glass and the isolation strip.

[0017] Optionally, a desiccant is placed in the cavity.

[0018] The present invention provides a glass curtain wall structure, including an inner layer of glass, an outer layer of glass and an isolation strip, wherein the inner layer of glass is transparent photovoltaic glass, a photovoltaic panel is arranged on the side of the inner layer of glass away from the outer layer of glass, the outer layer of glass is light-transmitting tempered glass, a gap is provided between the inner layer of glass and the outer layer of glass, the isolation strip is located between the inner layer of glass and the outer layer of glass, and the isolation strip, the inner layer of glass and the outer layer of glass enclose a closed cavity, a plurality of air inlets are arranged at the bottom of the cavity, the cavity is connected to a gas supply device through the air inlet, and the gas supply device is used to provide inert gas into the cavity. It has the following beneficial effects:

[0019] 1) The photovoltaic panels arranged on the photovoltaic glass can absorb sunlight and directly or indirectly convert solar radiation energy into electrical energy through the photoelectric effect or the photochemical effect, and then connect the electrical energy to loads such as air conditioning and lighting through the corresponding electrode lead wires, thereby effectively utilizing light energy and saving energy consumption;

[0020] 2) By isolating a cavity, the thermal insulation effect of the wall can be effectively improved, reducing the energy consumption of heating and cooling of the building;

[0021] 3) When there is no heating or cooling demand in the room, inert gas is provided into the cavity through a gas supply device, which can reduce the attenuation of the performance of the inner layer of glass and increase its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a glass curtain wall structure provided by an embodiment of the present invention;

[0023] Wherein, the accompanying drawings are marked as follows:

[0024] 10 - inner glass; 20 - outer glass; 30 - isolation strip; 40 - air inlet; 50 - cavity; 60 - first air outlet; 70 - second air outlet. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer based on the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0026] like Figure 1 As shown, this embodiment provides a glass curtain wall structure, including an inner layer of glass 10, an outer layer of glass 20 and an isolation strip 30, the inner layer of glass 10 is a transparent photovoltaic glass, a photovoltaic panel is arranged on the side of the inner layer of glass 10 away from the outer layer of glass 20, the outer layer of glass 20 is a light-transmitting tempered glass, there is a gap between the inner layer of glass 10 and the outer layer of glass 20, the isolation strip 30 is located between the inner layer of glass 10 and the outer layer of glass 20, and the isolation strip 30 and the inner layer of glass 10 and the outer layer of glass 20 enclose a closed cavity 50, a plurality of air inlets 40 are arranged at the bottom of the cavity 50, the cavity 50 is connected to a gas supply device through the air inlet 40, and the gas supply device is used to provide inert gas into the cavity 50.

[0027] Specifically, the inner glass 10 can be transparent photovoltaic glass, and a photovoltaic panel is arranged on the side of the inner glass 10 away from the cavity 50. Since the wavelength range of the spectrum response of a general solar cell is between (320nm-1100nm), the entire solar spectrum includes ultraviolet region, visible region and infrared region, the wavelength of 380nm-780nm is the visible region, the ultraviolet wavelength range is 0nm-380nm, and the infrared region is the band with a wavelength greater than 780nm, and the percentage of solar energy occupied by the three is 7%, 47.29%, and 45.71% respectively. The transparent photovoltaic glass allows visible light to pass unimpeded, and the transmittance of visible light is as high as 99%. By arranging a photovoltaic panel on the photovoltaic glass, sunlight can be absorbed, and the solar radiation energy can be directly or indirectly converted into electrical energy through the photoelectric effect or the photochemical effect, and then connected to the loads such as air conditioning and lighting through the corresponding electrode lead wires, so that light energy is effectively utilized and energy consumption is saved.

[0028] In this embodiment, the photovoltaic cell panel is a silicon-based thin film photovoltaic cell panel, and the silicon-based thin film photovoltaic cell panel is installed at the edges of the inner glass 10. Silicon-based thin film photovoltaic cell panels can be made on substrates of any shape, and can be designed into various shapes according to architectural needs, which can greatly save installation space and reduce costs. In addition, silicon-based thin film photovoltaic cell panels can be made in a form that transmits part of the visible light, which is conducive to the light entering the room and improving the lighting effect. Of course, the photovoltaic cell panel can also adopt crystalline silicon solar cells or other thin film photovoltaic cell panels on other substrates, and this application does not impose any restrictions on this.

[0029] In this embodiment, the photovoltaic glass contains halide perovskite. The properties of perovskite materials are adjustable, and its composition can be adjusted to selectively absorb light of a specific frequency. By adding halide perovskite to the photovoltaic glass, the photovoltaic glass is as clear as ordinary glass, ensuring that visible light has a high transmittance, and can selectively absorb ultraviolet and near-infrared light to generate electricity, which is beneficial to improving the photoelectric conversion efficiency and leaving excess heat outside.

[0030] The influence of glass curtain walls on indoor thermal environment mainly occurs in two aspects. On the one hand, it is the part of solar radiation that directly transmits heat to the indoor through the window, which means the ratio of the energy of solar radiation directly transmitting through the glass to the solar radiation energy on the glass surface under the same conditions, expressed by the solar heat gain coefficient (SHGC) of glass. On the other hand, due to the temperature difference between indoor and outdoor, heat exchange is inevitable through heat conduction of the outer window glass, which is mainly determined by the heat transfer coefficient of the glass, that is, the thermal insulation performance of the glass curtain wall.

[0031] This example calculates and compares the thermal insulation performance of two sets of double-layer glass curtain wall structures:

[0032] Curtain wall 1 is ordinary double-layer insulating glass, with inner and outer glass both 5mm thick, the middle air layer 9mm thick, free convection conditions, vertical insulating glass, outdoor temperature 34℃, indoor temperature 26℃.

[0033] Curtain wall 2 is made of inner transparent photovoltaic glass with a thickness of 5 mm, to which halide perovskite is added, outer ordinary glass with a thickness of 5 mm, an intermediate air layer with a thickness of 9 mm, free convection conditions, vertical insulating glass, outdoor temperature of 34°C, and indoor temperature of 26°C.

[0034] The heat transfer coefficient and solar heat gain coefficient of curtain wall 1 calculated in the end are greater than those of curtain wall 2. It can be seen that the inner transparent photovoltaic glass absorbs red and ultraviolet rays, reduces the temperature rise effect of solar radiation on the glass, reduces the heat transfer coefficient of the glass curtain wall and the solar heat gain coefficient, and greatly reduces the solar radiation heat gain of the building.

[0035] The outer layer of glass 20 is a light-transmitting tempered glass, so that the outer layer of glass 20 has a high light transmittance and a large strength, ensuring that there is sufficient light in the room. Tempered glass is a prestressed glass that uses chemical or physical methods to form compressive stress on the glass surface, so that when the glass is subjected to external force, the surface stress is first offset, thereby improving the bearing capacity and strength of the glass, and enhancing the glass's own resistance to wind pressure, cold and heat, impact, etc. In this embodiment, the outer layer of glass 20 is physically fully tempered or physically semi-tempered or chemically tempered, wherein the stress range of fully tempered glass is greater than 95MPa, the tempering temperature is 600°C, and the stress range of semi-tempered glass is 24MPa-69MPa.

[0036] Furthermore, the surface of the outer layer of glass 20 is covered with a low-reflection coating, so that the outer layer of glass 20 has a lower reflectivity to avoid causing serious light pollution.

[0037] In this embodiment, the thickness of the outer layer of glass 20 is greater than 5 mm, and its shape is a square, with a long side length ranging from 1900 mm to 3000 mm, and a short side length ranging from 80 mm to 1500 mm.

[0038] Please continue to refer to Figure 1 There is a gap between the inner glass 10 and the outer glass 20, and the gap is between 6mm and 20mm. By providing a gap between the inner glass 10 and the outer glass 20 and sealing them with a spacer strip 30 to form a cavity 50, and then providing a vent on the cavity 50 so that the glass curtain wall can "breathe", the heat insulation performance of the glass curtain wall is improved, and the energy consumption of heating and cooling of the building is reduced.

[0039] Please continue to refer to Figure 1 The bottom of the cavity 50 is provided with a plurality of air inlets 40, and the cavity 50 is connected to a gas supply device through the air inlets 40, and the gas supply device is used to provide an inert gas into the cavity 50. When there is no heating or cooling demand in the room, the inert gas is provided into the cavity 50 through the gas supply device, which can reduce the attenuation of the performance of the inner layer of glass 10 and increase its service life. In this embodiment, the inert gas is, for example, nitrogen or argon. This application is not limited to this.

[0040] Please continue to refer to Figure 1The top of the cavity 50 is also provided with a first air outlet 60 and a second air outlet. The first air outlet 60 is located on the side of the isolation bar 30 close to the inner glass 10 and penetrates the isolation bar 30. The second air outlet 70 is located on the side of the isolation bar 30 close to the outer glass 20 and penetrates the isolation bar 30. The air inlet 40 is located on the side of the isolation bar 30 close to the inner glass 10 and penetrates the isolation bar 30. The air inlet 40 is also connected to the room. In this embodiment, holes can be reserved on the ceiling. The first air outlet 60 and the second air outlet 70 are respectively connected to the room and the outside through the corresponding holes. The air inlet 40 is connected to the gas supply device or the room through the corresponding hole.

[0041] When there is no need for heating in the room, the first air outlet 60 and the second air outlet 70 are closed, the air inlet 40 is opened, and the gas supply device provides inert gas to the cavity 50. After the cavity 50 is filled with inert gas, the air inlet 40 is closed.

[0042] When the indoor temperature is higher than the outdoor temperature, generally in winter when heating is needed, the second air outlet 70 is closed, the first air outlet 60 and the air inlet 40 are both opened, and the indoor is connected to the cavity 50 so that the indoor air enters the cavity 50, realizing an air circulation mode of indoor air intake and indoor air outlet. At this time, the indoor air entering the cavity 50 forms a barrier, increasing the thermal resistance of the glass curtain wall structure, reducing the heat exchange between the indoor and outdoor, thereby effectively increasing the temperature of the inner glass 10 and reducing the heating energy consumption of the building.

[0043] When the indoor temperature is lower than the outdoor temperature, generally in summer when cooling is needed, the first air outlet 60 is closed, the second air outlet 70 and the air inlet 40 are both opened, and the indoor cold air enters the cavity 50 and squeezes out the hot air in the cavity 50 from the second air outlet 70. Since the cold air has a large density and the hot air has a small density, the indoor cold air enters the cavity 50 from the air inlet 40 at the lower part of the cavity 50 and squeezes out the hot air from the second air outlet 70. After the cold air rushes into the cavity 50, the second air outlet 70 and the air inlet 40 are opened again after a set time interval, and the gas in the cavity 50 is heated again, so as to realize the air circulation mode of indoor air intake and outdoor air outlet, and form a low-temperature air layer in the cavity 50, which blocks the transmission of outdoor temperature and delays the temperature rise of the inner glass 10, thereby delaying the rise of indoor temperature and reducing the cooling energy consumption of the building.

[0044] Furthermore, the second air outlet 70 is also connected to a negative pressure suction device. When there is no heating demand in the room, the negative pressure suction device draws out the air in the cavity 50 through the second air outlet 70 to make the cavity 50 reach a negative pressure state, thereby obtaining better heat insulation and sound insulation effects.

[0045] In this embodiment, an automatic control valve, a flow regulating valve and a filter are provided at the air inlet 40, the first air outlet 60 and the second air outlet 70. The automatic control valve is used to control the opening or closing of the air inlet 40, the first air outlet 60 and the second air outlet 70, the flow control valve is used to adjust the flow of the inert gas and the flow of the indoor air, and the filter is used to filter the gas.

[0046] In this embodiment, sealant is filled between the inner glass 10, the outer glass 20 and the isolation strip 30, and the sealant improves the sealing performance of the cavity 50. The sealant is, for example, a weather-resistant sealant or a silicone structural sealant, and the present application does not impose any limitation on this.

[0047] In this embodiment, a desiccant is placed in the cavity 50. By placing a desiccant in the cavity 50 to absorb the moisture in the cavity 50, fogging of the inner glass 10 and the outer glass 20 is avoided, so that the glass remains smooth and transparent even at very low temperatures, the thermal insulation and sound insulation performance of the glass curtain wall structure is improved, and the service life of the glass curtain wall structure is fully extended. It should be understood that the desiccant must meet the conditions of good absorption capacity for volatiles and minimum adsorption of inert gases. For example, a suitable molecular sieve desiccant can be selected, which is an artificially synthesized desiccant product with strong adsorption for water molecules. It is a crystalline aluminosilicate compound with regular and uniform pores in its crystal structure, and the pore size is on the order of the molecular size. It only allows molecules with a diameter smaller than the pore size to enter. Of course, other desiccants can also be used, and this application does not impose any restrictions on this.

[0048] In addition, this embodiment uses a certain region as a standard to calculate the economic benefits of solar energy conversion and utilization and compares the lighting effect. Take the spring solar radiation of the region as 1275MJ / m2, the summer solar radiation as 1593MJ / m2, the autumn solar radiation as 1052MJ / m2, the winter solar radiation as 772MJ / m2, the annual radiation as 4692MJ / m2, the photovoltaic glass panel area accounts for 90% of the wall surface, the outer glass 20 transmittance is 90%, and the inner photovoltaic glass conversion rate is 20%. Finally, the annual economic benefit of the curtain wall per 100 square meters is the heat generated by the combustion of 2.9 tons of standard coal, which has extremely high economic benefits.

[0049] Ordinary silicon-based solar photovoltaic glass curtain walls have high conversion efficiency for solar energy. However, due to their complete blocking of sunlight, they cannot guarantee natural lighting effects for buildings that require daylighting. They are suitable for buildings or roofs that have no daylighting requirements or require sunshade. In contrast, transparent photovoltaic glass curtain walls are suitable for building facades that require daylighting.

[0050] In summary, the embodiment of the present invention provides a glass curtain wall structure, including an inner layer of glass, an outer layer of glass and an isolation strip, wherein there is a gap between the inner layer of glass and the outer layer of glass, the isolation strip is located between the inner layer of glass and the outer layer of glass, and the isolation strip, the inner layer of glass and the outer layer of glass enclose a closed cavity, the bottom of the cavity is provided with a plurality of air inlets, the cavity is connected to a gas supply device through the air inlets, and the gas supply device is used to provide an inert gas to the cavity. By arranging a photovoltaic cell panel on the photovoltaic glass, sunlight can be absorbed, and the solar radiation energy can be directly or indirectly converted into electrical energy through the photoelectric effect or the photochemical effect, and then connected to loads such as air conditioning and lighting through the corresponding electrode lead wires, so that light energy is effectively utilized and energy consumption is saved. In addition, isolating a cavity can effectively improve the thermal insulation effect of the wall, reduce the energy consumption of heating and cooling of the building, and when there is no heating and cooling demand in the room, inert gas can be provided to the cavity through the gas supply device, which can reduce the attenuation of the performance of the inner layer of glass and increase its service life.

[0051] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A glass curtain wall structure, characterized in that: The invention comprises an inner layer of glass, an outer layer of glass and an isolation strip, wherein the inner layer of glass is transparent photovoltaic glass, a photovoltaic cell panel is arranged on the side of the inner layer of glass away from the outer layer of glass, the outer layer of glass is light-transmitting tempered glass, a gap is provided between the inner layer of glass and the outer layer of glass, the isolation strip is located between the inner layer of glass and the outer layer of glass, and the isolation strip, the inner layer of glass and the outer layer of glass enclose a closed cavity, a plurality of air inlets are arranged at the bottom of the cavity, the cavity is connected to a gas supply device through the air inlets, and the gas supply device is used to provide inert gas into the cavity; The top of the cavity is also provided with a first air outlet and a second air outlet, the first air outlet is located on a side of the isolation strip close to the inner glass and passes through the isolation strip, the second air outlet is located on a side of the isolation strip close to the outer glass and passes through the isolation strip, the air inlet is located on a side of the isolation strip close to the inner glass and passes through the isolation strip, and the air inlet is also connected to the room; The photovoltaic cell panel is a silicon-based thin-film photovoltaic cell panel.

2. The glass curtain wall structure according to claim 1, characterized in that: When there is no heating or cooling demand in the room, the first air outlet and the second air outlet are both closed, the air inlet is opened, and the gas supply device provides inert gas to the cavity; When the temperature of the room is higher than the temperature of the outside, the second air outlet is closed, the first air outlet and the air inlet are both opened, and the room is connected with the cavity so that the air in the room enters the cavity; When the indoor temperature is lower than the outdoor temperature, the first air outlet is closed, the second air outlet and the air inlet are both opened, and the cold air in the room enters the cavity and squeezes out the hot air in the cavity from the second air outlet.

3. The glass curtain wall structure according to claim 2, characterized in that: The second air outlet is also connected to a negative pressure suction device. When there is no heating demand in the room, the negative pressure suction device draws out the air in the cavity through the second air outlet.

4. The glass curtain wall structure according to claim 2, characterized in that: The air inlet, the first air outlet and the second air outlet are all provided with an automatic control valve, a flow regulating valve and a filter.

5. The glass curtain wall structure according to claim 1, characterized in that: The photovoltaic glass contains halide perovskite.

6. The glass curtain wall structure according to claim 1, characterized in that: The surface of the outer glass is covered with a low-reflection coating.

7. The glass curtain wall structure according to claim 1, characterized in that: The gap between the inner layer of glass and the outer layer of glass is between 6 mm and 20 mm.

8. The glass curtain wall structure according to claim 1, characterized in that: Sealant is filled between the inner layer of glass, the outer layer of glass and the isolation strip.

9. The glass curtain wall structure according to claim 1, characterized in that: A desiccant is placed in the cavity.

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