Glazed assembly

Abstract

The present invention concerns a glazed assembly comprising at least two panes, one of which having a higher energetic absorptance, at least one heat transfer means and at least one ventilation means that may improve the thermal management of a building; a partition comprising the glazed assembly; the use of the glazed assembly positioned in a partition for preheating a fluid circulating from one side to the other side of the partition; the process of preheating a fluid circulating from one side to the other side of the partition thanks to the glazed assembly.

Description

Glazed assembly Technical field

[0001] The present invention concerns a glazed assembly comprising at least two panes, one ofwhich having a higher energetic absorptance, at least one heat transfer means and at least one ventilation means that may improve the thermal management of a building.

[0002] The present invention also concerns a partition comprising the glazed assembly, the useof the glazed assembly positioned in a partition for preheating a fluid circulating from one side to the other side of the partition, the process of preheating a fluid circulating from one side to the other side of the partition thanks to the glazed assembly. Background art

[0003] Nowadays, in order to respond to the climate change, an important trend is to increasethe energy performance of buildings.

[0004] The move to improved energy performance typically includes a better insulation of thebuildings. Improved insulation often goes hand in hand with increased airtightness of the building envelope. While airtightness helps in reducing heat loss or gain, it can also restrict the natural exchange of indoor and outdoor air. Natural exchange or ventilation relies on airmovement through cracks, gaps, or open windows, helps remove indoor pollutants, moisture and replenish fresh air. Insufficient natural ventilation due to increased insulation can result in poor indoor air quality. Therefore, ventilation is an important consideration that needs to be considered in parallel to the insulation improvement of a building. The current trend is toconsider ventilation as a parameter to take into account for the design and assessment ofenergy performance of buildings. It is the case for instance in the mandatory energyperformance assessments of buildings in Belgium in the PEB (Performance Énergétique des Bâtiments) or in France in the DPE (Diagnostic de Performance Energétique).

[0005] Ventilation may be a natural ventilation, a single-flow or double-flow mechanicalventilation. Natural ventilation is a process using natural forces, such as wind and temperature differences or indoor depression created for instance by chimneys, to create airflow andexchange indoor and outdoor air. It relies on openings like windows, doors, cracks, gaps, vents or chimneys to allow fresh air to enter and stale air to exit the building. This has cleardisadvantages during cold seasons, when the incoming air is cold. Cold air can create thermaldiscomfort and must be heated, which has a negative impact on energy performance.Furthermore, the air flow is not controlled with this system. Single-flow mechanical ventilation involves the use of mechanical fans typically installed in humid rooms such as bathrooms, kitchens, or utility rooms to remove stale air from a building. This method creates a depression inside the building, which draws fresh air in through unintentional leaks or intentional vents. There is a control on the air flow, but the incoming air is again at the exterior environment temperature. Double-flow mechanical ventilation is a system that uses mechanical fans to both exhaust stale air and supply fresh air to a building in a controlled manner. This system ensures a balanced air flow by using two fans: one for extracting stale air from the buildingtypically and another for bringing in fresh air. The two air streams pass through a heat exchanger, which allows for the transfer of heat between the outgoing and incoming air streams, improving energy efficiency. Air is typically extracted from humid rooms and blowninto the dry rooms. With this system, there is an air flow control and the heat exchangerrecovers heat from the outgoing air and preheats the incoming air which is advantageous froman energy point of view and from a thermal comfort point of view.

[0006] When considering typically natural and single-flow mechanical ventilation, glazing mayplay an important role in the flow of incoming air. Windows with ventilation vents are availableon the market ensuring the supply of fresh air in the building, typically through dry rooms such as living rooms and bedrooms. However, the incoming air is at the temperature of the outsideenvironment. Although there are air vents with self-regulating valves that supply fresh air in a controlled manner by automatically adjusting the air flow, this system attempts to balance ventilation and excessive cold draughts, but does not fully eliminate these cold incoming air drawbacks.

[0007] There is thus a need for a glazed assembly allowing the supply of fresh air in the buildingand preheating that incoming air before it enters the building in order to achieve better thermalcomfort while limiting the energy consumption for heating the incoming air to room temperature, and thus contributing to the energy performance of buildings.Summary of invention

[0008] Against these drawbacks, we hereby provide a glazed assembly configured to separatea first space, Sp1, from a second space, Sp2, comprising:a) a glazing unit comprising:^ a first glass pane, GP1, having two main faces, F11 and F12, an upper edge, a loweredge and lateral edges, ^a second glass pane, GP2, having two main faces, F21 and F22, an upper edge, alower edge and lateral edges, ^a first spacer assembly comprising a first spacer and at least one sealing barrier andhermetically coupling GP1 and GP2 and defining a first internal volume between them, wherein face F11 is oriented towards Sp1, face F12 and face F21 are in contact with the first internal volume and face F22 is oriented towards Sp2, and wherein a part of GP2, GP2e, extends beyond the first spacer assembly on at least one edge of GP2, b) at least one heat transfer means,c) at least one ventilation means,and wherein: ^the energetic absorptance, AE2 , of GP2 is greater than the energetic absorptance, AE1,of GP1, AE2 > AE1, ^the at least one heat transfer means is fastened to GP2e,^ the at least one ventilation means encompasses the at least one heat transfer meansand fluidly connects spaces Sp1 and Sp2.

[0009] The invention further concerns a partition of a stationary or a mobile object configured toseparate an exterior space and an interior space, said partition comprising an opening in which the glazed assembly is positioned with Sp1 being the exterior space and Sp2 being theinterior space.

[0010] The invention further concerns the use of the glazed assembly positioned in an openingof a partition of a stationary or a mobile object configured to separate an exterior space and an interior space, with Sp1 being the exterior space and Sp2 being the interior space, forpreheating a fluid circulating from the exterior space to the interior space through the ventilation means by transfer of the solar energy absorbed by GP2 to the heat transfer meansfastened to GP2e and from the heat transfer means to the fluid.

[0011] The invention also relates to a process for preheating a fluid circulating from an exteriorspace to an interior space comprising the steps of: ^positioning the glazed assembly in an opening of a partition of a stationary or a mobileobject configured to separate an exterior space and an interior space with Sp1 being the exterior space and Sp2 being the interior space, ^circulating the fluid from the exterior space to the interior space through the ventilationmeans.

[0012] The inventors have found that a glazed assembly according to the invention allows thesupply of fresh air in a mobile or stationary object, typically a building, as well as the preheatingof that incoming air before it enters the building. It was found that GP2 having a higherenergetic absorptance than GP1, and therefore absorbing more solar energy when exposedto sunlight and heating up, is able to transfer this heat by conduction to its part extendingbeyond the spacer assembly, GP2e. From GP2e the heat is extracted and transferred to theheat transfer means fastened thereto. Heat is then available to preheat to the fluid, typically air, in the vicinity of the heat transfer means. A heat flow or heat pump mechanism is thus generated. The ventilation means encompasses the heat transfer means and is configured to provide a connection for fluids, typically air, between Sp1 and Sp2. When the glazed assembly is positioned in a partition of a stationary or a mobile object, for instance a façade wall of a building, with Sp1 being the exterior space and Sp2 being the interior space, the air flow from the exterior to the interior space passing through the ventilation means is preheated in the vicinity of the heat transfer means before reaching the interior space. Detailed description of the invention

[0013] The present invention relates to a glazed assembly configured to separate a first space,Sp1, from a second space, Sp2, comprising: a) a glazing unit comprising:^ a first glass pane, GP1, having two main faces, F11 and F12, an upper edge, alower edge and lateral edges, ^a second glass pane, GP2, having two main faces, F21 and F22, an upper edge,a lower edge and lateral edges,^ a first spacer assembly comprising a first spacer and at least one sealing barrierand hermetically coupling GP1 and GP2 and defining a first internal volume between them, wherein face F11 is oriented towards Sp1, face F12 and face F21 are in contact with the first internal volume and face F22 is oriented towards Sp2, and wherein a part of GP2, GP2e, extends beyond the first spacer assembly on at least one edge of GP2, b) at least one heat transfer means,c) at least one ventilation means,and wherein: ^the energetic absorptance, AE2 , of GP2 is greater than the energetic absorptance, AE1,of GP1, AE2 > AE1, ^the at least one heat transfer means is fastened to GP2e,^ the at least one ventilation means encompasses the at least one heat transfer meansand fluidly connects spaces Sp1 and Sp2.

[0014] The glazed assembly according to the invention is configured to separate a first spacedesignated as Sp1 from a second space designated as Sp2. Each of Sp1 and Sp2 is locatedon one of the sides of the glazed assembly. As an example, if the glazed assembly ispositioned in a façade wall of a building, Sp1 and Sp2 will be the exterior and interior spaceslocated on each side of the glazed assembly.

[0015] The glazed assembly comprises a glazing unit with a first and a second glass panedesignated respectively as GP1 and GP2. Each of GP1 and GP2 has two main faces designated as F11 and F12 for GP1 and F21 and F22 for GP2, and lateral faces defining the thickness of the glass panes. GP1 and GP2 may have the same or different dimensions. Inthe glazed assembly of the invention, face F11 is oriented towards Sp1, face F12 and face F21 are in contact with the first internal volume and face F22 is oriented towards Sp2. “Oriented towards” indicates an orientation of a pane face towards a given space and does not imply a contact with that space. “In contact with” means that a face is partially or totally in contact with a given space. The glass panes have also edge zones herein designated asedges, which are the peripheral zones of the glass panes. They have an upper and a bottom edge which are respectively the edges configured to be above and below the other edgeswhen the glazed assembly is installed in a building and they have lateral edges connectingthe upper and bottom edges. The glass panes have typically an upper edge, a bottom edgeand 2 lateral edges. Generally, the glass panes are rectangular or square and have 2 mainfaces, 4 lateral faces, an upper edge, a bottom edge and 2 lateral edges.

[0016] The term “glass” in the present invention is understood to mean any type of mineral ororganic glasses known to the skilled in the art. The mineral glasses may be soda-lime-silicate glass, alumino-silicate glass, alkali-free glass, boro-silicate glass, crystalline and polycrystalline glasses. Preferably, the mineral glass is a soda-lime-silicate glass, alumino- silicate glass or boro-silicate glass. More preferably and for reasons of lower production costs, the mineral glass is a soda-lime-silicate glass.

[0017] Advantageously, the expression soda-lime-silicate glass in the present invention is usedin a broad sense and relates to any mineral glass which comprises the following components in weight percentage, expressed with respect to the total weight of mineral glass (Comp. A).More preferably, the mineral glass composition (Comp. B) is a soda-lime-silicate-type glass with a base glass matrix of the composition comprising the following components in weight percentage, expressed with respect to the total weight of mineral glass. Comp. A Comp. BSiO2 40 - 78% 60 - 78 wt%Al2O3 0 - 18% 0 - 8 wt%, pref 0 - 6 wt%B2O3 0 - 18% 0 - 4 wt%, pref 0 - 1 wt%Na2O 0 - 20% 5 – 20 wt%, pref 10 - 20 wt%CaO 0 - 15% 0 - 15 wt%, pref 5 - 15 wt%MgO 0 – 10% 0 – 10 wt%, pref 0 - 8 wt%K2O 0 – 10% 0 – 10 wt%BaO 0 – 5% 0 – 5 wt%, pref 0 - 1 wt%.

[0018] Other advantageous glass compositions for the mineral glass of the present invention,comprise the following components in weight percentage, expressed with respect to the total weight of mineral glass:Comp. C Comp. D Comp. E65 ≤ SiO2 ≤ 78 wt% 60 ≤ SiO2 ≤ 78 % 65 ≤ SiO2 ≤ 78 wt% 5 ≤ Na2O ≤ 20 wt% 5 ≤ Na2O ≤ 20 % 5 ≤ Na2O ≤ 20 wt% 0 ≤ K2O < 5 wt% 0.9 < K2O ≤ 12 % 1 ≤ K2O < 8 wt% 1 ≤ Al2O3 < 6 wt%,4.9 ≤ Al2O3 ≤ 8 % 1 ≤ Al2O3 < 6 wt%pref 3 < Al2O3 ≤ 5 % 0 ≤ CaO < 4.5 wt% 0.4 < CaO < 2 % 2 ≤ CaO < 10 wt% 4≤ MgO ≤ 12 wt% 4 < MgO ≤ 12 % 0 ≤ MgO ≤ 8 wt%(MgO / (MgO+CaO)) ≥ 0.5,K2O / (K2O+Na2O) : 0.1 - 0.7.pref 0.88 ≤ [MgO / (MgO+CaO)] < 1.

[0019] In particular, examples of mineral base glass matrixes for the composition according tothe invention are described in published in PCT patent applications WO2015 / 150207A1, WO2015 / 150403A1, WO2016 / 091672 A1, WO2016 / 169823A1 and WO2018 / 001965 A1.

[0020] According to certain embodiments of the invention, the mineral glass may have acomposition comprising a total iron (expressed in terms of Fe2O3) content ranging from 0.002 to 0.06 weight%. A total iron (expressed in the form of Fe2O3) content of less than or equal to 0.06 weight% makes it possible to obtain a mineral glass with almost no visible coloration. Preferably, the composition comprises a total iron (expressed in the form of Fe2O3) content ranging from 0.002 to 0.04 weight%. More preferably, the composition comprises a total iron (expressed in the form of Fe2O3) content ranging from 0.002 to 0.020 weight%. Advantageously, for extra-clear mineral glass, the composition comprises a total iron (expressed in the form of Fe2O3) content ranging from 0.002 to 0.015 weight% for the lowest visible light absorption.

[0021] The mineral glass may also be a tinted mineral glass which has an energetic absorptionhigher than normal clear glass. In particular, the tinted mineral glass is composed of a soda- lime -silicate glass comprising the aforesaid components and an added coloring agent. Some examples of commercial tinted mineral glasses are Planibel Bronze, Planibel Dark Blue,Planibel Dark Grey, Planibel Green, Planibel Grey, Planibel Linea Azzurra, Planibel Privablue soda-lime glass ranges commercialized by AGC Glass Europe.

[0022] Glass sheets of mineral glass can be obtained by the known methods such as a floatingprocess, a drawing process, a rolling process or any other process known to manufacture a glass sheet starting from a molten glass composition.

[0023] Organic glasses are typically transparent thermoplastic polymers having a Young’smodulus of at least 0.5 GPa and a glass transition temperature of at least 70°C. The term “transparent” denotes a property illustrating the average LT (light transmittance) of visible light transmitted through a material in the visible spectrum of at least 1%. Preferably, transparent relates to a LT of at least 10%, more preferably a LT of at least 50%, most preferably a LT of at least 70%. Light transmittance is the percentage of incident light flux, illuminant D65 / 2°,transmitted by the material. The glass transition temperature is a well-known quantity that can be measured according to methods known by the skilled person such as for instance according to ISO 11357-2. The Young’s modulus is preferably at least 1 GPa, more preferably at least 1.5 GPa. The Young’s modulus is also a well-known quantity that can be measured according to methods known by the skilled person such as for instance according to ASTM D 638 and D 618 (Procedure A or B) in the case of polymers. The organic glasses are well- known by the skilled in the art and some non-exhaustive examples of suitable polymers comprise polystyrene, polyethylene terephthalate, polycarbonate and poly(methyl methacrylate). The most widely used as organic glasses are typically polycarbonate and poly(methyl methacrylate).

[0024] Glass sheets of organic glass may be obtained by any method known by the skilled in theart.

[0025] The organic glass may also be a tinted organic glass obtained by adding a coloring agentto the polymer and increasing its energetic absorptance. Example of coloring agents are dyesor pigments. These additives selectively absorb certain wavelengths of solar radiation, converting them into heat.

[0026] The glass panes in the present invention may be selected from single glass sheets orlaminates of two glass sheets assembled by a polymer interlayer.

[0027] The polymer interlayer that may be used in the present invention typically comprises amaterial selected from the group consisting ethylene vinyl acetate copolymer (EVA), polyisobutylene (PIB), polyvinyl butyral (PVB), polyurethane (PU), polyvinyl chlorides (PVC), polyesters, copolyesters, polyacetals, cyclo olefin polymers (COP), ionomer and / or an ultraviolet activated adhesive, and others known in the art of manufacturing glass laminates.Blended materials using any compatible combination of these materials can be suitable as well. Typically, polymer interlayers suitable to laminate mineral glass sheets comprise a thermoplastic material selected from the group consisting of ethylene vinyl acetate copolymer and polyvinyl butyral, more preferably polyvinyl butyral. The polymer interlayer is also designated as a “bonding interlayer” since the polymer interlayer and the glass pane form a bond that results in adhesion between the glass pane and the polymer interlayer. Typical thicknesses for polymer interlayers are 0.3 mm to 3.5 mm, preferably 0.75 mm to 1.75 mm.Traditional, commercially available polymer interlayers are polyvinyl butyral (PVB) layers of 0.38 mm and 0.76mm, 1.52 mm, 2.28 mm and 3.04mm. To achieve the desired thickness,one or more of those films can be used.

[0028] Polymer interlayers having enhanced energetic absorptance also exist. Such polymerinterlayers are well-known by the skilled in the art as solar control interlayers, some non-exhaustive examples of which are solar control ethylene vinyl acetate copolymer or polyvinyl butyral, preferably a solar control polyvinyl butyral.

[0029] The glass panes are characterized by a solar direct absorptance in the sense of EN410herein referred to as energetic absorptance. The energetic absorptance of GP2 designatedas AE2, is greater than the energetic absorptance of GP1 designated as AE1, AE2 > AE1.

[0030] The inventors have found that when GP1 has a limited energetic absorptance and GP2has a higher one, a significant amount of solar energy is transmitted through GP1 andavailable for absorption by GP2 that heats up. This heat is transferred by conduction to GP2eand extracted from GP2e to the heat transfer means fastened thereto and is available forpreheating the fluid in the vicinity of said heat transfer means.

[0031] The energetic absorptance of GP1, AE1 is thus preferably at most 20%, more preferablyat most 15% so that a significant amount of energy remains available for absorption by GP2.

[0032] The energetic absorptance of GP2, AE2 is preferably at least 25%, more preferably atleast 30%

[0033] In an embodiment of the invention AE2 is at least 10% greater than AE1, preferably atleast 15% greater, more preferably at least 20% greater, even more preferably at least 30% greater.

[0034] In a preferred embodiment, GP2 is selected from a single tinted mineral glass sheet anda laminate of two mineral glass sheets assembled by a polymer interlayer. Said polymerinterlayer may be a solar controlled interlayer. GP2 may also comprise pre-stressed glasssheet(s) that may optionally be tinted. GP2 may alternatively be a double glazing with aninternal volume filled with water, aqueous or solvent solutions or gels that are transparentwhile also having the ability to absorb solar energy and conduct heat.

[0035] In another preferred embodiment, GP1 is a single mineral glass sheet such as a soda-lime-silica glass sheet, alumino-silicate glass sheet or boro-silicate glass sheet. Preferably,GP1 is a soda-lime-silica glass sheet.

[0036] In yet another preferred embodiment, GP1 is a soda-lime-silica glass sheet and GP2 isselected from a single tinted mineral glass sheet and a laminate of two mineral glass sheets assembled by a polymer interlayer. Said polymer interlayer may be a solar controlled interlayer.

[0037] The glazing unit comprises also a first spacer assembly comprising a first spacer and at least one sealing barrier. The spacer is made of any material known by the skilled personsuch as metal, polymer, ceramic, glass, a composite material reinforced by glass fibers or a mix of several of these materials. Use of warm-edge spacers, often made of polymer reinforced with a metallic foil, are advantageous to reduce thermal fluxes at the periphery ofthe glass panes. The spacer can be solid or hollow. Hollow spacers are able to receive dryingmaterials also designated as desiccants. When the spacer is solid, for instance made ofpolymer, the desiccative material may be incorporated into the polymer matrix. The spacer has typically a thickness ranging from 4 to 32 mm. In standard glazing units, the thicknessranges from 9 to 18 mm.

[0038] The spacer is hold between the glass panes typically by means of at least one sealingbarrier consisting of a seal located at each interface between the spacer and the glass panes.This first sealing barrier is typically made of materials selected from polyisobutylene, silicone,acrylic resin, epoxy resin, polyurethane resin, and mixtures or combinations thereof. In some embodiments, an additional sealing barrier may be present at the interface between on onehand the spacer and the first sealing barrier and on the other hand the exterior of the glazingunit. This second sealing barrier is typically made of materials selected from polyisobutylene,silicone, polysulfide, polyurethane or mixtures or combinations thereof. Generally the spacerassembly consists either of a spacer and first sealing barrier or of a spacer, a first and asecond sealing barrier.

[0039] The spacer assembly hermetically couples GP1 and GP2 and maintains them at a certaindistance from each other. The spacer assembly, GP1 and GP2 thus define an internal volumehermetically sealed and typically filled with an insulating gas which may be selected from air, dry air, argon (Ar), krypton (Kr), xenon (Xe), sulfur hexafluoride (SF6), carbon dioxide or a combination thereof. Said gas or gas mixtures are effective for enhancing thermal insulating performances and / or may be used to reduce sound transmission. Preferably the gas within the internal volume comprises at least 50% Ar or Kr as such noble gases considerably improveinsulation properties.

[0040] The second glass pane, GP2, has a part extending beyond the spacer assembly on atleast one edge of GP2, said part or portion is designated as GP2e. In other words, GP2eprotrudes over the spacer assembly towards the exterior of the glazing unit, in the directionopposite to the internal volume. GP2e extends beyond the spacer assembly on one edge ofGP2 or on several edges of GP2.

[0041] In a preferred embodiment, GP2e extends beyond the spacer assembly on the upperedge and / or on at least one of the lateral edges of GP2. In this embodiment, it means thatGP2e extends beyond the spacer assembly either on the upper edge, or on one or more ofthe lateral edges, or both on the upper edge and on one or more of the lateral edges of GP2.

[0042] In an embodiment of the present invention, GP2e extends up to a distance of at least 5cm, 7 cm, 8 cm or even 10 cm beyond the spacer assembly. This distance is adapted, for example made larger for larger glass panes, as a larger GP2e may provide a larger heatexchange area.

[0043] In another particular embodiment, GP2e extends not only beyond the spacer assembly,but also beyond the corresponding edge or the corresponding edges of GP1 so that GP2eprotrudes over GP1 on that edge or on these edges. As an example, if GP2e extends beyondthe upper edge of GP2, it extends beyond the upper edge of GP1, if GP2e extends beyondthe upper edge and one lateral edge of GP2, it extends beyond the upper edge and the same lateral edge of GP1. In this embodiment, GP2e may extend up to a distance of at least 7 cm,8 cm or even 10 cm beyond the spacer assembly. This distance may again be adapted, for example made larger for larger glass panes as a larger GP2e may provide a larger heatexchange area.

[0044] The glazed assembly also comprises at least one heat transfer means which is fastenedto GP2e. Heat transfer means aim at collecting and extracting the heat received by GP2e fromGP2 and transfer it to the fluid surrounding them. The term “fluid” in the present invention isunderstood to mean material media including gases and liquids. The fluid is preferably a gasand preferably air, more preferably atmospheric air, which can equivalently be referred to as ambient air. Heat transfer means may include a plurality of heat exchange fins. Heat exchangefins enlarge the heat transfer surface thus increasing heat transfer efficiency from GP2e tothe surrounding fluid. The contact between the heat transfer means and GP2e at the fastening zone has to conduct heat as much as possible by any suitable means. The fastening of heattransfer means to GP2e may for instance be done with thermally conductive adhesivematerials, such as for example glues or double-sided adhesives. Such adhesive materialsimprove thermal conduction at the fastening zones with GP2e. The thermal conduction at thefastening zones can further be improved by a conductive coating deposited on GP2e, forinstance a copper coating. The heat transfer means is fastened to GP2e and may optionallyextend beyond GP2e in the direction opposite to the internal volume.

[0045] When GP2e extends beyond the spacer assembly on several edges of GP2, it is preferredthat a heat transfer means is fastened on GP2e on each of said edges.

[0046] In a preferred embodiment, GP2e extends beyond the spacer assembly on the upperedge and / or at least one of the lateral edges of GP2, and heat transfer means is / are fastened to GP2e on the corresponding edge(s) of GP2. So, in this preferred embodiment, GP2e may:- extend beyond the spacer assembly on the upper edge of GP2 with a heat transfer meansfastened to GP2e on said upper edge, or- extend beyond the spacer assembly on one lateral edge of GP2 with a heat transfer meansfastened to GP2e on said lateral edge, or- extend beyond the spacer assembly on more than one lateral edges of GP2 with heattransfer means fastened to GP2e on each of said lateral edge, or- extend beyond the spacer assembly on the upper edge of GP2 and on one or more lateraledges of GP2 with a heat transfer means fastened to GP2e on said upper edge and onsaid one or more lateral edge(s).

[0047] In another preferred embodiment, GP2e extends beyond the spacer assembly on theupper edge and / or at least one of the lateral edges of GP2 and beyond the correspondingedge(s) of GP1 and heat transfer means is / are fastened to GP2e on the correspondingedge(s) of GP2. So, in this preferred embodiment, GP2e may:- extend beyond the spacer assembly on the upper edge of GP2 and beyond the upperedge of GP1 with one heat transfer means fastened to GP2e on said upper edge, or- extend beyond the spacer assembly on one lateral edge of GP2 and beyond thecorresponding lateral edge of GP1 with one heat transfer means fastened to GP2e on saidlateral edge, or -extend beyond the spacer assembly on more than one lateral edges of GP2 and beyondthe corresponding lateral edges of GP1 with one heat transfer means fastened to GP2e on each of said lateral edges, or -extend beyond the spacer assembly on the upper edge of GP2 and on one or more lateraledges of GP2 and beyond the upper and the corresponding lateral edge(s) of GP1 with one heat transfer means fastened to GP2e on said upper edge and on each of said oneor more lateral edge(s).

[0048] The position of the heat transfer means on the upper edge and / or one of the lateral edgesof GP2 is advantageous over the bottom edge.

[0049] In another preferred embodiment applicable to all previous embodiments, the at least oneheat transfer means is preferably fastened to GP2e on face F21. In a double glazingconfiguration, any heat transfer means is preferably fastened to GP2e on face F21. This is ofparticular interest when the glazed assembly aims at being positioned in a partition of a stationary or a mobile object, for instance a façade wall of a building, with Sp1 being the exterior space and Sp2 being the interior space because in this case the heat transfer means are available for preheating air coming from the exterior space.

[0050] The glazed assembly also comprises at least one ventilation means which encompassesthe heat transfer means and fluidly connects spaces Sp1 and Sp2. In other words, the ventilation means is configured to allow a connection for fluids between Sp1 and Sp2, i.e. it allows the existence of a fluid continuum between Sp1, the inside of the ventilation means and Sp2. It is also configured to encompass the heat transfer means so that the fluid present inside the ventilation means surrounds the heat transfer means and advantageously benefitsfrom be preheating by the heat transfer means.

[0051] When the glazed assembly comprises several heat transfer means, they are allencompassed by ventilation means to ensure the fluid circulation in the vicinity of the heattransfer means. Depending on the position of the heat transfer means, one or more ventilation means might be necessary.

[0052] While preheating exterior air before it enters a building is advantageous in cold seasons,it can be disadvantageous in warm seasons. Therefore, the ventilation means may optionally comprise self-regulating valves that limit the circulation of the fluid near the heat transfer means.

[0053] In a particular embodiment of the invention, the ventilation means comprises a ventilationcap defining a ventilation path between Sp1 and Sp2, said ventilation cap: ^encompasses the heat transfer means,^ is fastened to at least one of the glass panes of the glazing unit ,^ comprises at least one ventilation hole opening to Sp1 and at least one ventilation holeopening to Sp2 that are fluidly connected by the ventilation path.

[0054] In this particular embodiment, the ventilation means is fastened to the glazing unit.However, an embodiment wherein the glazed assembly comprises frame elements with afastening or integration of the ventilation means to one or more frame elements is notexcluded.

[0055] For aesthetic reasons and / or for allowing the replacement of the glazing with the glazedelement of the invention while keeping the existing frame, the ventilations means can be arranged flush with at least one face of the glazing unit.

[0056] When the glazed assembly is positioned in a partition of a stationary or a mobile object,for instance a façade wall of a building, with Sp1 being the exterior space and Sp2 being the interior space, the ventilation path may be configured to allow air circulation from the exterior to the interior space. The heat transfer means are positioned in the ventilation path thereby allowing preheating air from the exterior space circulating through the ventilation path.

[0057] In a preferred embodiment of the invention, the glazing unit further comprises:^ a third glass pane, GP3, having two main faces, F31 and F32, an upper edge, a loweredge and lateral edges, and having an energetic absorptance, AE3, ^a second spacer assembly comprising a second spacer and at least one sealing barrierand hermetically coupling: ^GP3 to GP2 and defining a second internal volume between GP3 and GP2with faces F31 and F22 in contact with said second internal volume and F32 oriented towards Sp2, or^ GP3 to GP1 and defining a second internal volume between GP3 and GP1with faces F32 and F11 in contact with said second internal volume and F31 oriented towards Sp1.

[0058] Similarly to GP1 and GP2, GP3 has two main faces designated as F31 and F32 andlateral faces defining the thickness of the glass pane. GP3 has an upper, a bottom and lateraledges connecting the upper and bottom edges. GP3 has typically an upper edge, a bottom edge and 2 lateral edges. Generally, GP3 is rectangular or square and has 2 main faces, 4 lateral faces, an upper edge, a bottom edge and 2 lateral edges. GP1, GP2 and GP3 may have the same or different dimensions.

[0059] In this preferred embodiment, the glazing unit comprises a second spacer assemblycomprising a second spacer and at least one sealing barrier and an optional second sealing barrier as described supra. The second spacer assembly may be composed of the same elements as the first spacer assembly or may be different. The second spacer assemblyhermetically couples GP3 either to GP2 or to GP1 and maintains them at a certain distancefrom each other. In other words, GP2 is sandwiched between GP1 and GP3 or GP1 is sandwiched between GP3 and GP2, respectively. In the first case, faces F31 and F22 are incontact with the second internal volume and F32 is oriented towards Sp2. In the second case, faces F32 and F11 are in contact with the second internal volume and F31 is oriented towards Sp1. The spacer assembly, GP2 and GP3 or the spacer assembly, GP1 and GP3 thus define a second internal volume which is filled with an insulating gas or gas combination, as defined supra, which may have the same composition as in the first internal space or a different one.

[0060] In this preferred embodiment, the energetic absorptance of GP3, AE3, may either behigher, equal or lower than the energetic absorptance of GP2, it is preferably equal or lower than the energetic absorptance of GP2, more preferably lower than the energetic absorptance of GP2. In this preferred last case, GP2 is thus a glass pane having a higher energetic absorptance than both GP1 and GP3. Even more preferably, the energetic absorptance of GP2, AE2, is at least 10% greater than the energetic absorptance of GP3, AE3, preferably 15% greater, more preferably 20% greater, most preferably 30% greater.

[0061] In another more preferred embodiment, the second spacer assembly hermeticallycouples GP3 to GP2 and defines a second internal volume between them with faces F31 andF22 in contact with said second internal volume and F32 oriented towards Sp2. In this embodiment, GP2 is sandwiched between GP1 and GP3.

[0062] GP3 may be a single glass sheet or a laminate of two glass sheets assembled by apolymer interlayer as described supra. GP3 is preferably is a single mineral glass sheet suchas a soda-lime-silica glass sheet, alumino-silicate glass sheet or boro-silicate glass sheet. More preferably, GP3 is a soda-lime-silica glass sheet.

[0063] In this more preferred embodiment, GP1 and GP3 are preferably soda-lime-silica glasssheets and GP2 is preferably selected from a single tinted mineral glass sheet and a laminateof two mineral glass sheets assembled by a polymer interlayer. Said polymer interlayer may be a solar controlled interlayer.

[0064] In this more preferred embodiment, the at least one heat transfer means is preferablyfastened to GP2e on face F21. When the glazed assembly comprises several heat transfer means, they are preferably fastened to GP2e on face F21. This is of particular interest when the glazed assembly aims at being positioned in a partition of a stationary or a mobile object,for instance a façade wall of a building, with Sp1 being the exterior space and Sp2 being the interior space because in this case the heat transfer means are available for preheating air circulating from the exterior space to the interior space.

[0065] In this more preferred embodiment, different configurations of the glazed assembly arepossible.

[0066] In a first configuration, GP2e extends beyond the first spacer assembly on at least oneedge of GP2 and beyond the corresponding at least one edge of GP1 so that GP2e protrudesover GP1 on at least that edge and F21 of GP2e is thus exposed to Sp1. In this configuration,a heat transfer means is fastened to F21 of GP2e.

[0067] In a second configuration, GP2e extends beyond the first spacer assembly on at leastone edge of GP2 and beyond the corresponding at least one edge of GP1 and further extends beyond the second spacer assembly on that / those same edge(s) of GP2 and beyond thecorresponding at least one edge of GP3. In this case, GP2e protrudes over GP1 and overGP3 on at least that edge, and F21 of GP2e is thus exposed to Sp1 and F22 of GP2e to Sp2.In this configuration, a heat transfer means is fastened to F21 of GP2e and an additional heattransfer means may be fastened to F22 of GP2e. Alternatively, a heat transfer means is fastened to F21 of GP2e and a insulating material may be fastened to F22 of GP2e.

[0068] In an embodiment of the invention, at least a part of at least one pane face of the glazingunit comprises a functional coating. That is to say that when the glazing unit comprises twoglass panes GP1 and GP2, at least a part of at least one of F11, F12, F21 and F22 comprisesa first functional coating. When the glazing unit comprises three glass panes GP1, GP2 andGP3, at least a part of at least one of F11, F12, F21, F22, F31 and F32 comprises a firstfunctional coating. The glazing unit may also comprise several functional coatings on at leastpart of several glass pane faces.

[0069] The functional coatings are infrared (IR) reflecting and / or absorbing coatings, for examplesolar control coatings or low-emissivity (lowE) insulating coatings. The position and nature of the functional coating may be adapted according to thermal management needs, for example for increased insulating properties in colder regions of for increased solar control needs in hotter regions.

[0070] Functional coatings may comprise a transparent conductive oxide or comprise at leastone functional, infrared reflecting, layer comprising silver, and include one or more layers, and in many embodiments it may be multilayer coating. Low-emissivity functional coatings for example includes at least one infrared (IR) reflecting layer (e.g., based on silver) sandwiched between at least first and second dielectric layers. Since one example function of low- emissivity coatings is to block certain amounts of IR radiation and prevent the same from reaching the building interior, the solar management coatings may include at least one IR blocking (i.e., IR reflecting and / or absorbing) layer. Example IR blocking layer(s) which may be present in coatings are of or include silver (Ag), nickel-chrome (NiCr), gold (Au), and / or any other suitable material that blocks significant amounts of IR radiation. It will be appreciated by those skilled in the art that IR blocking layer(s) of lowE coating need not block all IR radiation, but only need to block significant amounts thereof. In certain embodiments, each IR blocking layer of coating is provided between at least a pair of dielectric layers. Example dielectric layers include silicon nitride, titanium oxide, silicon oxynitride, tin oxide, zinc stannate, and / or other types of metal-oxides and / or metal-nitrides. In certain embodiments, in addition to being between a pair of dielectric layers, each IR blocking layer may also be provided between a pair of contact layers of or including a material such as an oxide and / or nitride of nickel-chrome or any other suitable material. Example low-emissivity coatings which may be provided on substrates are described in Patents WO03106363A1, WO2004071984A1, WO2006048462A1, WO2009115595A1, WO2009115596A1, WO2009115599A1, WO2006048463A1, WO2006067102A1, WO2006122900A1, WO2007138097A1, WO2008113786A1, WO2011147875A1, WO2011147864A1, WO2013079400A1, WO2014191472A1, WO2014191474A1, WO2014191484A1, WO2014125081A1, WO2014125083A1, WO2014207171A1, all of which are herebyincorporated herein by reference. Of course, functional coatings herein are not limited to these particular coatings, and any other suitable functional coatings capable of blocking amounts of IR radiation may instead be used. Functional coatings herein may be deposited on glasssheets in any suitable manner, including but not limited to sputtering, vapor deposition, and / orany other suitable technique.

[0071] In a preferred embodiment, the glazing unit comprises a functional coating on at least apart of F21. When the glazing unit comprises three glass panes GP1, GP2 and GP3 with GP2sandwiched between GP1 and GP3, a second functional coating may be present on at leasta part of F22, i.e. both faces of GP2 may be at least partially covered by a functional coating.Producing a glass pane with a functional coating on each face involves additional costly process steps such as cleaning the glass surface before the application of any additionalcoating not obtained directly on the float glass production line, so that alternatively, a secondfunctional coating may be present on at least a part of F31, i.e. the two pane faces facing the second internal volume are at least partially covered by a functional coating.

[0072] The glass panes energetic absorptances in the present invention may be adjusted by the energetic absorptance of a glass sheet used, its tint and thickness, by the use of polymerinterlayers, and / or also by the choice of a functional coatings deposited on at least one pane face.

[0073] According to any of the embodiments or combination of embodiments hereinabove, thelight transmittance of the glazing unit is at least 30%, preferably at least 40%, more preferably at least 50%.

[0074] The present invention further concerns a partition of a stationary or a mobile object configured to separate an exterior space and an interior space, said partition comprising an opening in which a glazed assembly according to any of the embodiments or combination of embodiments hereinabove is positioned with Sp1 being the exterior space and Sp2 being the interior space.

[0075] The stationary object may typically be a building and the mobile object may be for instancea vehicle, a rapid transit system such as a train, tram or the like. The interior space is the space inside the object and the exterior space is the space outside the object.

[0076] In this configuration, the heat of GP2 is transferred to GP2e by conduction and extractedfrom GP2e to the heat transfer means fastened thereto. The ventilation means encompassing the heat transfer means fluidly connects Sp1 and Sp2, i.e. the ventilation means allows theexistence of a fluid continuum between Sp1, the inside of the ventilation means and Sp2. Therefore, the fluid present in the ventilation means in the vicinity of the heat transfer means advantageously benefits from the heat available in said heat transfer means and is preheated to a temperature above the temperature of the exterior environment. A heat flow or heat pump mechanism is thus generated.

[0077] The partition is preferably a partition of a building, more preferably a façade wall of abuilding separating the exterior space, i.e. the environment outside the building, from the interior space of the building. The glazed assembly thus provides the air intake needed to ventilate the interior space, while ensuring thermal comfort by preheating the incoming air. It is particularly suitable for a building having natural or single-flow mechanical ventilation, since in these cases, glazing is a major entry point for incoming air.

[0078] The present invention also concerns the use of a glazed assembly according to any ofthe embodiments or combination of embodiments hereinabove, wherein the glazed assembly is positioned in an opening of a partition of a stationary or a mobile object configured toseparate an exterior space and an interior space, with Sp1 being the exterior space and Sp2being the interior space, for preheating a fluid circulating from the exterior space to the interior space through the ventilation means by transfer of the solar energy absorbed by GP2 to theheat transfer means fastened to GP2e and from the heat transfer means to the fluid. Asexplained hereabove, the solar energy absorbed by GP2 is transferred to GP2e by conductionand extracted from GP2e is extracted by the heat transfer means fastened thereto. The heat is thus available to preheat to the fluid, typically air, present in the ventilation means in the vicinity of the heat transfer means.

[0079] The present invention also relates to a process for preheating a fluid circulating from anexterior space to an interior space comprising the steps of: ^positioning a glazed assembly according to any of the embodiments or combination ofembodiments hereinabove in an opening of a partition of a stationary or a mobile objectconfigured to separate an exterior space and an interior space with Sp1 being the exterior space and Sp2 being the interior space, ^circulating the fluid from the exterior space to the interior space through the ventilationmeans.

[0080] The fluid circulation from the exterior space to the interior space may for instance beinduced by a depression in the interior space. The depression may be the result of indoor airescaping the building envelope for instance through cracks, gaps, open windows or chimneys as may be the case with natural ventilation; or may be due to the use of mechanical fans used to remove stale air from the building in the case of a single-flow ventilation. The circulation may also be forced by a fan.

[0081] The invention will now be further illustrated by way of drawings and examples that areprovided for illustrative purposes only and which in no way limit the scope of the invention. The drawings are schematic representations and are not drawn to scale. It is noted that theinvention relates to all possible combinations of features recited in the claims or in the described embodiments. Description of drawings

[0082] Figure 1 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention where the ventilation means is not illustrated. In this view, the glazed assembly (1) separates two spaces Sp1 and Sp2. It comprises a glazing unit with a first glass pane, GP1, having two main faces, F11 and F12, an upper edge, a loweredge and 4 lateral edges. It comprises a second glass pane, GP2, having two main faces,F21 and F22, an upper edge, a lower edge and 4 lateral edges. GP2 is a glass pane having an energetic absorptance, AE2, greater than the energetic absorptance, AE1, of GP1 (AE2 > AE1). GP1 and GP2 are hermetically coupled by a first spacer assembly (101) and GP1, GP2 and the spacer assembly (101) define a first internal volume not visible on the drawing. Face F11 is oriented towards Sp1, face F12 and face F21 are in contact with the first internal volume and face F22 is oriented towards Sp2. A part of GP2, referred to as GP2e, extends beyondthe first spacer assembly (101) on the upper edge of GP2 and beyond the upper edge of GP1.A heat transfer means (103) is fastened to GP2e on face F21 and includes a plurality of heatexchange fins.

[0083] Figure 2 is a cross-sectional view of Figure 1 according to A-A’ where the ventilationmeans (104) and the first internal volume (102) are illustrated. The ventilation means (104)encompasses the heat transfer means (103) and provides a fluid connection between spaces Sp1 and Sp2. It is fastened to GP1 and GP2 and is flush with the glazing unit, it does not protrude beyond F11 on the side of Sp1 and does not protrude beyond F22 on the side ofSp2.

[0084] Figure 3 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention where the ventilation means is not illustrated. In thisembodiment, GP2e extends beyond the first spacer assembly (101) on the upper edge of GP2 and beyond the upper edge of GP1. The heat transfer means (103) is fastened to GP2e on face F21 and extends beyond GP2e in the direction opposite to the internal volume.

[0085] Figure 4 is a cross-sectional view of Figure 3 according to B-B’ where the ventilationmeans (104) and the first internal volume (102) are illustrated. The ventilation means (104)encompasses the heat transfer means (103) and provides a fluid connection between spaces Sp1 and Sp2. It is fastened to glass panes GP1 and GP2 and is flush with the glazing unit, it does not protrude beyond F11 on the side of Sp1 and does not protrude beyond F22 on the side of Sp2.

[0086] Figure 5 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention where the ventilation means is not illustrated. In this viewGP2e extends beyond the first spacer assembly (101) on one lateral edge of GP2 and beyondthe corresponding lateral edge of GP1. A heat transfer means (103) is fastened to the extension GP2e on face F21 and includes a plurality of heat exchange fins.

[0087] Figure 6 is a cross-sectional view of a glazed assembly (1) according to a certainembodiment of the present invention. In this view, the first spacer assembly comprises a firstspacer (1010), a sealing barrier (1011) and another sealing barrier (1012). GP2e extends beyond the first spacer assembly on the upper edge of GP2, but not beyond the upper edge of GP1. A heat transfer means (103) is fastened to GP2e on face F21 and is encompassed by the ventilation means (104).

[0088] Figure 7 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention where the ventilation means is not illustrated. In this view, the glazed assembly (1) comprises a glazing unit similar to that of Figure 1 to which is added: ^a third glass pane, GP3, having two main faces, F31 and F32, an upper edge, a loweredge and 4 lateral edges, ^a second spacer assembly (105) hermetically coupling GP3 to GP2 and defining a secondinternal volume (106) between them, not visible on the drawing.In this view, GP2 is sandwiched between GP1 and GP3. The faces F31 and F22 are in contactwith the second internal volume and F32 is oriented towards Sp2. GP2e extends beyond thefirst spacer assembly (101) on the upper edge of GP2 and beyond the upper edge of GP1.

[0089] Figure 8 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention where the ventilation means is not illustrated. In this view, the glazed assembly (1) comprises a glazing unit similar to that of Figure 5 to which is added: ^a third glass pane, GP3, having two main faces, F31 and F32, an upper edge, a loweredge and 4 lateral edges, ^a second spacer assembly (105) hermetically coupling GP3 to GP2 and defining a secondinternal volume (106) between them, not visible on the drawing. In this view, GP2 is sandwiched between GP1 and GP3. The faces F31 and F22 are in contact with the second internal volume and F32 is oriented towards Sp2. GP2e extends beyond thefirst spacer assembly (101) on one lateral edge of GP2 and beyond the same edge of GP1.

[0090] Figure 9 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention which differs from Figure 8 in that GP2e further extendsbeyond the second spacer assembly (105) and beyond the corresponding lateral edge of GP3.In this case, GP2e protrudes over GP1 and over GP3 on that edge, and F21 of GP2e is thus exposed to Sp1 and F22 to Sp2. A heat transfer means (103) is fastened to F21 of GP2e andanother heat transfer means (103) is fastened to F22 of GP2e.

[0091] Figure 10 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention which differs from Figure 8 in that GP2e further extendsbeyond the second spacer assembly (105) and beyond the corresponding lateral edge of GP3. Thus GP2e protrudes over GP1 and over GP3 on that edge. In this view, F21 of GP2e is exposed to Sp1 and a heat transfer means (103) is fastened thereto and an insulating material(109) is fastened to F22 of GP2e.

[0092] Figure 11 is a schematic 3D view of a glazed assembly (1) according to a certainembodiment of the present invention where the ventilation means (104) is illustrated. It comprises a first glass pane, GP1, having two main faces, F11 and F12, a second glass pane, GP2, having two main faces, F21 and F22 and a third glass pane, GP3, having two mainfaces, F31 and F32. Face F11 is oriented towards Sp1, face F12 and face F21 are in contact with the first internal volume. In this view, GP2 is sandwiched between GP1 and GP3. Thefaces F31 and F22 are in contact with the second internal volume and F32 is oriented towardsSp2. The ventilation means (104) extends upwards and encompasses the heat transfermeans (not visible). The ventilation means comprises a ventilation cap (107) defining aventilation path between Sp1 and Sp2 and a ventilation hole (108) for the fluid inlet visible at the bottom of the ventilation means on Sp1 side and a ventilation hole (not visible) at the top of the ventilation means on Sp2 side. Examples

[0093] A first triple glazing, example 1, according to embodiments of the present invention wasprepared. The first glass pane, GP1, was a 4mm thick clear soda-lime glass sheet bearing alow emissivity functional coating on face F12. The third glass pane, GP3, was a 4mm thick clear soda-lime glass sheet bearing a low emissivity functional coating on F31. The secondglass pane, GP2, was a 6mm thick bronze colored tinted soda-lime glass sheet. The first and second internal volumes are filled with a gas comprising 90% Ar. The first internal volume is of 10mm thickness and the second internal volume is of 12mm thickness. Both functional coatings are thermal insulation coatings ‘iplus 1.1’ commercialized by AGC Glass Europe. A corresponding conventional triple glazing unit without heat transfer means and ventilationmeans on GP2e, comparative example 1, was also prepared.

[0094] A second triple glazing, example 2, according to embodiments of the present inventionwas prepared. The first glass pane, GP1, and the third glass pane, GP3, were 4mm thick clearsoda-lime glass sheets both bearing a lowE insulating coating iPlus 1.1 from AGC Glass Europe on their faces respectively in contact with the first internal volume, F12, and thesecond internal volume, F31. The second glass pane, GP2, comprised two extra-clear, or low-iron, 4mm thick soda-lime glass sheets joined by a 0.38mm thick grey PVB polymer interlayer.The first and second internal volumes are filled with a gas comprising 90% Ar. The first internal volume is of 10mm thickness and the second internal volume is of 12mm thickness. Acorresponding conventional triple glazing unit without heat transfer means and ventilationmeans on GP2e, comparative example 2, was also prepared.

[0095] A third triple glazing, example 3, according to embodiments of the present invention wasprepared. GP1 and GP3 were 4mm thick extra-clear, low-iron soda-lime glass sheets, glasssheets bearing no functional coatings. GP2 comprised two clear 4mm thick soda-lime glasssheets joined by a 0.72mm thick clear PVB polymer interlayer. The first and second internal volumes are filled with a gas comprising 90% Ar. The first internal volume is of 10mmthickness and the second internal volume is of 12mm thickness. GP2 bears on the face F21a functional coating, the thermal insulation coating ‘iplus 1.1’ commercialized by AGC Glass Europe. GP2 further bears on the face F22 a functional coating, a solar control coating,‘Stopray Vision 60 commercialized by AGC Glass Europe. A corresponding conventional triple glazing unit without heat transfer means and ventilation means on GP2e, comparativeexample 3, was also prepared.

[0096] In the examples 1 to 3, GP2e extends by 10cm beyond the first spacer assembly and thesecond spacer assembly.

[0097] Table 1 below illustrates some simulated opto-energetical properties of the examples 1to 3 in simulated working conditions where the glazed element is positioned in a building withthe first space Sp1 being the exterior space and the second space Sp2 being the interiorspace. The solar factor (SF) also designated as the solar heat gain coefficient measures how readily heat from direct solar energy flows through a glazing. Solar factor is the ratio between incident solar energy transmitted through a glazing, and the total solar energy received by thesurface of the glazing facing the exterior space. SF is expressed as a percentage, the higher the value, the greater the solar energy transmitted through the glazing, so the more solar heat penetrates and the warmer the interior space is kept. The SF calculation is provided in standard norms such as norms EN410 or ISO9050. Norm EN410 is typically used for building applications. The solar factor (SF) was calculated by simulation for examples 1 to 3 wherein for evaluation purposes all solar energy absorbed by the second glass pane is estimated to be reemitted towards the interior space providing a theoretical higher solar factor (SF). GoodU-values and light transmittance (LT) are maintained.

[0098] In comparison, the glazed assemblies of comparative examples 1 to 3 have the referenceSF values of the glazed elements without heat transfer means and ventilation means onGP2e.

[0099] Examples 1 to 3 have a higher solar factor than the comparative examples. Heat will thus be available for transfer to GP2e and to the heat transfer means. The air flow from the exterior to the interior space passing through the ventilation means can be preheated in the vicinity of the heat transfer means before reaching the interior space. The glazing assemblies according the invention can thus contribute to a better thermal comfort while limiting the energyconsumption for heating the air entering into the interior space to room temperature and then contribute to the energy performance of buildings.Table 1 Energetic absorptance [%] LT [%] SF [%] U[W / (m².K)] First Second Third glass glass glass pane pane pane Example 1 13 32 3 41 57 0.8Comparative13 32 3 41 42 0.8example 1 Example 2 13 30 3 41 59 0.8Comparative13 30 3 41 42 0.8example 2 Example 3 2 34 1 56 62 0.7Comparative2 34 1 56 42 0.7example 3NUMERAL REFERENCESRef.# Feature1 Glazed assemblySp1 First spaceSp2 Second spaceGP1 First glass paneF11 One main face of GP1F12 The other main face of GP1GP2 Second glass paneF21 One main face of GP2F22 The other main face of GP2GP2e Part of GP2 extending beyond the a spacer assembly101 First spacer assembly1010 First spacer1011 A sealing barrier1012 Another sealing barrier102 First internal volume103 Heat transfer means104 Ventilation meansGP3 Third glass paneF31 One main face of GP3F32 The other main face of GP3105 Second spacer assembly106 Second internal volume107 Ventilation cap108 Ventilation hole109 Insulating material

Claims

CLAIMS1. A glazed assembly (1) configured to separate a first space, Sp1, from a second space, Sp2,comprising: a) a glazing unit comprising:^ a first glass pane, GP1, having two main faces, F11 and F12, an upper edge, alower edge and lateral edges, ^a second glass pane, GP2, having two main faces, F21 and F22, an upper edge,a lower edge and lateral edges, ^a first spacer assembly (101) comprising a first spacer (1010) and at least onesealing barrier (1011) and hermetically coupling GP1 and GP2 and defining a first internal volume (102) between them, wherein face F11 is oriented towards Sp1, face F12 and face F21 are in contact with the first internal volume (102) and face F22 is oriented towards Sp2, and wherein a part of GP2, GP2e, extends beyond the first spacer assembly on at least one edge of GP2, b) at least one heat transfer means (103),c) at least one ventilation means (104),characterized in that :^ the energetic absorptance, AE2 , of GP2 is greater than the energetic absorptance, AE1,of GP1, AE2 > AE1, ^the at least one heat transfer means (103) is fastened to GP2e,^ the at least one ventilation means encompasses the at least one heat transfer means andfluidly connects spaces Sp1 and Sp2.

2. The glazed assembly according to the preceding claim wherein GP2e extends beyond thespacer assembly on the upper edge and / or on at least one of the lateral edges of GP2.

3. The glazed assembly according to any of the preceding claims wherein GP2e extends beyondthe spacer assembly on at least one edge of GP2 and beyond the corresponding at least one edge of GP1.

4. The glazed assembly according to any of the preceding claims wherein the at least one heattransfer means (103) is fastened to GP2e on face F21.

5. The glazed assembly according to any of the preceding claims wherein GP2e extends up toat least 5 cm, 7 cm, 8 cm or even 10 cm beyond the first spacer assembly on at least one edge of GP2.

6. The glazed assembly according to any of the preceding claims wherein GP2 is a single tintedmineral glass sheet or a laminate of two mineral glass sheets with a polymer interlayer.

7. The glazed assembly according to any of the preceding claims wherein the energeticabsorptance of GP2, AE2, is at least 10% greater than the energetic absorptance of GP1, AE1, preferably 15% greater, more preferably 20% greater, most preferably 30% greater.

8. The glazed assembly according to any of the preceding claims wherein the glazing unit furthercomprises: ^a third glass pane, GP3, having two main faces, F31 and F32, an upper edge, a loweredge and lateral edges, and having an energetic absorptance, AE3, ^a second spacer assembly (105) comprising a second spacer and at least one sealingbarrier and hermetically coupling: ^GP3 to GP2 and defining a second internal volume (106) between GP3 and GP2with faces F31 and F22 in contact with said second internal volume and F32 oriented towards Sp2, or ^GP3 to GP1 and defining a second internal volume (106) between GP3 and GP1with faces F32 and F11 in contact with said second internal volume and F31 oriented towards Sp1.

9. The glazed assembly according to the preceding claim wherein the second spacer assembly(105) hermetically couples GP3 to GP2 and defines a second internal volume (106) between them with faces F31 and F22 in contact with said second internal volume and F32 orientedtowards Sp2.

10. The glazed assembly according to any of claims 8 and 9 wherein the energetic absorptanceof GP2, AE2, is greater than the energetic absorptance of GP3, AE3, preferably at least 10% greater, more preferably 15% greater, even more preferably 20% greater, most preferably 30% greater.

11. The glazed assembly according to any of the preceding claims wherein at least a part of atleast one pane face of the glazing unit comprises a functional coating.

12. The glazed assembly according to any of the preceding claims wherein the ventilation meanscomprises a ventilation cap (107) defining a ventilation path between Sp1 and Sp2, said ventilation cap: ^encompasses the heat transfer means,^ is fastened to at least one of the glass panes of the glazing unit,^ comprises at least one ventilation hole (108) opening to Sp1 and at least one ventilationhole (108) opening to Sp2 that are fluidly connected by the ventilation path.

13. A partition of a stationary or a mobile object configured to separate an exterior space and aninterior space, said partition comprising an opening in which a glazed assembly according to any of claims 1 to 12 is positioned with Sp1 being the exterior space and Sp2 being the interior space.

14. Use of a glazed assembly according to any of claims 1 to 12 positioned in an opening of apartition of a stationary or a mobile object configured to separate an exterior space and an interior space with Sp1 being the exterior space and Sp2 being the interior space, for preheating a fluid circulating from the exterior space to the interior space through the ventilation means by transfer of the solar energy absorbed by GP2 to the heat transfer meansfastened to GP2e and from the heat transfer means to the fluid.

15. Process for preheating a fluid circulating from an exterior space to an interior spacecomprising the steps of: ^positioning a glazed assembly according to any of claims 1 to 12 in an opening of apartition of a stationary or a mobile object configured to separate an exterior space and an interior space with Sp1 being the exterior space and Sp2 being the interior space,^ circulating the fluid from the exterior space to the interior space through the ventilationmeans.

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