SE446030B - Solar heat accumulating supply air wall - Google Patents

Abstract

The invention is a solar heat accumulating supply air wall comprising a wall construction, built on-site or prefabricated, that absorbs solar heat, stores the heat for a 24-hour period and supplies the solar heat to the room lying within via ventilation air. The ventilation air runs through the wall from outside in via air slats (6, 7) in the wall. While travelling through the air slats (6, 7), the air takes/gives air from/to the thermal storage layers (3, 4) in the wall. The wall can be made with any degree of thermal insulation capability, determined by the thickness of the thermal insulation layer (5), without the solar heat receiving function being affected.<IMAGE>

Description

8300463-0 Background of the Invention In the current shortage of energy raw materials such as oil and electricity, the interest in utilizing solar heat for heating buildings has grown increasingly lfltïeSSê.

It is essential that devices for collecting and recovering (storage) of solar heat can be carried out with simple measures, eg integrated in the building construction. For this purpose, south-facing vertical façade parts appear to be suitable, especially at more northern latitudes where the angle of incidence of the sun during the heating season becomes favorable. Such applications are usually referred to as "passive solar heating applications" as they do not require complicated HVAC technology for their functioning.

In other countries, including France and the USA, the so-called Thrombus Wall has been developed for passive solar heat utilization. The basic idea with Trombeväggen (see DFE report no. 44 page 269 or The passive solar energy book, Edward Mazria pages 44-58) is precisely to collect solar heat during the day and store it in the wall's thermally sluggish stone material and thus obtain a heated one towards the building. wall surface. However, this type of wall is not well suited in colder climates with low solar intensities. The tornado wall has a, for Swedish conditions, substandard thermal insulation capacity § '7 _ Device as a solar heat-absorbing supply air wall uses thermally sluggish' material for storage of the solar heat supplement and equalization over the day 'while maintaining thermal insulation capacity to a standard standard structure comparable to Swedish.

Object of the invention and most important features The device as a sun-absorbing supply air wall thus has a sun-receiving part consisting of a transparent surface layer (1), air gap (6) and an absorber (2) with heat-storing thermally heavy material, eg concrete (3). The inner layer of the wall towards the interior rooms or rooms has a conventional thermal insulation (5).

Through devices with air gaps and air ducts according to the attached drawing (fig. 1), the building's supply air ventilation absorbs the solar heat which is stored in the thermally "heavy" parts of the wall, by supplying the air around the house through the air gaps around the clock. As a side effect, it is occasionally obtained that the supply air flow also counteracts a certain part of heat pipes from inside and out through the wall (so-called transmission losses) as the temperature gradient in the wall is such that it shuts down. 8300463-0 §description_to] ~ figures Fig. 1. Vertical section through wall construction 1 2 10 11 For snow radiation transparent facade covering in one or more layers.

Dark colored surface for absorption of soybean radiation and remodeling of this heat, can be performed with so-called "selective coating".

Load-bearing wall layers in stone or concrete material1. nLika (3). heat-insulating material against transmission losses from inside and out through the wall.

Air gap 1 vertical for transporting ventilation air to the building through the wall.

Like (5).

Air passage between the air gaps (6) and (7).

Outdoor air intake. ventmtionšiufts- (tinuftsqintag tm the room.

Damper for venting the air gap (6) in the event of overheating, eg in summer the damper is set so that it closes to the air passage (8) and opens to the air gap (12). 'Air gap for overheating ventilation.

Damper for direct intake of ventilation air, in summer the damper is set so that it closes to the air gap (7) and opens to the air gap (14).

Air gap for direct intake of ventilation air without passage through the air spaces (6) and (7).

Claims (5)

lssdoëss-u gATENTKRAv Wall construction consisting on the outside of a transparent sheet (1), a heat-absorbing layer (3, 4) and a heat-insulating layer (5), the transparent sheet (1) and the heat-absorbing layer (3, 4) being provided with spaced apart to form an air gap (6) and wherein the heat absorbing layer (3, 4) forms an air passage which can be connected to the interior space via a connecting channel with the air gap (6) between it (the transparent sheet (1) and the heat absorbing the layer (3, 4) and on the other hand over a further channel (10) 7 characterized in that the heat-absorbing layer has an outer (3) and an inner (4) layer which are spaced apart from each other. during the formation of an inner air gap (7) which forms an air passage through the heat-insulated layer, that the outer air gap (6) which is arranged between the transparent sheet (1) and the outer heat-absorbing layer (3) has an air-insulating manner in a known manner. (9) and l uft outlet (12) leading to the external environment, the outlet (12) including a damper (11) or the like by means of which in a first end position during closing of the connecting channel (8) between the outer (6) and the inner (7) air gap the ambient air sucked in through the air inlet (9) can flow out into the environment again and in a second end position the connecting duct (8) between the outer (6) and inner (7) air gap is opened while simultaneously closing the air outlet (12) and _ I f that in the connecting duct (10) leading to the inner space opens an air entrance duct (14) which is connected to the outer environment, the entrance opening being provided with a damper (13) or the like in such a way that the inner space in a first end position is in immediate connection to the surroundings via the duct (10) and the air inlet duct (14) in the event of a simultaneous interrupted connection to the inner air gap (7) and that in a second end position the immediate air connection. the connection is interrupted when the connection to the inner air gap (7) is opened at the same time. Wall construction according to claim 1, characterized in that the air gaps (6, 7) according to claim 1 are formed by inserts of trapezoidal profiled sheet metal, or the like, as a distance between the partial layers of the wall (1, 2, 3, 4). Cradle construction according to claim 27, characterized in that with this embodiment, with trapezoidal plate or similar sheet metal layer, an air gap 8300463-0 for the passage of the ventilation air can also be placed behind the solar heat-absorbing surface layer (2) then made of sheet metal. 4. A wall construction according to claim 3, characterized in that the solar heat-absorbing surface is coated with a selective layer from a radiation point of view, which reduces the proportion of heat radiation from the surface. Wall construction according to claim 1, characterized in that the air passage through the wall takes place alternatively in ducts instead of in gaps in the heat-storing stone or concrete materials (3, 4).