Claims
Claims 1. Heat accumulator (9) for temporarily storage of heat at a temp era trip surpluses, for example daytime, with the aid of a phase change material, as glaubersalt, and for dispose of the temporarily the stored heat at a temperature deficit, for example at night, which accumulator (9) in include a container (7), that is done of a material with good heat management ability, as aluminum, and has at least one vertical wall (3), that on the outside has contact with the atmosphere air and on the inside has contact with the phase change material (10), that is held in that, characterized by that on the outside of mentioned vertical wall (3) is a formulated majority cavities in the wall surface, which cavities have a basis mould essential in the form of a first isosceles triangle with the basis turned downward and the opposite point turned up and which cavities prove to have a depth curve, that stretches himself from the triangle's basis to the opposite point and that begins and ends shallow and reach a maximum depth essential midway between the basis and the opposite point.
2. Heat accumulator according to claim ^characterized by that it first equal parting take the triangle's legs is curved toward the triangle's centers.
3. Heat accumulator according to claim 1 or 2, characterized by that mentioned opposite point of the first equal parting take the triangle is blunt.
4. Heat accumulator according to some off the claim 1-3, characterized by that mentioned depth curve in side boredom stretches itself right to out to the first equilateral triangle's legs and that the cavities at these legs has precipitous sidewalls.
5. Heat accumulator according to some off the claim 1-4, characterized by that from a central batch of the first equal parting take the triangle's basis against the opposite point and in level with the container's wall surface stretches himself a surface batch, as essential has the mould of a second isosceles triangle, that has same basis that it first equal parting to take the triangle but only is approximately the half so long and that has a opposite point approximately midway between first equal parting to take the triangle's basis and opposite point.
6. Heat accumulator according to claim 5, characterized by that it other equal parting take the triangle's legs is curved toward the triangle's centers.
7. Heat accumulator according to claim 5 or 6, characterized by that mentioned opposite point of the other equal parting take the triangle is bulging.
8. Heat accumulator according to some off the claim 5-7, characterized by that mentioned depth curve inside boredom stretches itself right in to the legs and the opposite point of the other equilateral triangle and that the cavities at these legs and this point has precipitous walls.
9. Heat accumulator according to some off the claim 1-8, characterized by that it constitutes one of several lamellae of one lamellacurtain, that is suitable to be suspended in a room in a platen surface (a window). |
Description
HEAT ACCUMULATOR The invention's area
The invention intends a heat accumulator stem temporarily storage of heat at a temperature surpluses, for example daytime, with the aid of one phase change material, as glaubersalt, and for dispose of the temporarily stored heat at a temperature deficit, for example at night, which accumulator includes a container, that is done of a material with good heat management ability, as aluminum, and has at least one vertical wall, that on the outside has contact with the atmosphere air and on the inside has contact with mentioned phase change material, that is held in that.
Well-known technology
From the patentscript DE 42 09 251 A1 is a heat accumulator according to preamble well-known. That described accumulator has the advantage that it uses one phase change material as glauber - or other PCM-salt and in this way can store considerably more energy than for example waters. The salt is held in a closed container of metal, that constitutes it of several lamellae in one lamellacurtain. Lamellae is twisting around the own length - or vertical abor and is moveover relocation in sideways. The thought with this is that on goodest possible ways use an existing temperature surplus, that for example can to be achieved of sunbeams that fall in through a window, or at a temperature deficit, for example when mentioned sunbeams are absent on evening, during so long time that possible once or more to give off the salt stored energy.
Despite the above described adjustable of lamellae, that does the possible to twist them for example after the sun, lacks the well-known accumulator in the form of it lamellacurtain the ability that in the described the use example to achieve your entire possible energy storage during only some few sun hours, that on distances from the land's equator stands to have at one ' s disposal during spring and autumn. This depends on that convection between the ambient air and the accumulator is too slow.
Well-known ways to promote convection is either establishing of protrusive flanges or to strengthen it natural, of the heat run air power with the aid of a fan. It is realized that flanges raise the price of the accumulator both concerning production and material consumption and that a fan means costs both in obtaining and operation and moreover influences the energy balance negative.
The purpose with the invention
Against this background is the purpose with the invention to so improve the well-known accumulator that in particular faster heat storage becomes possible.
Summary of the invention according to the invention is achieved this purpose through that on the outside of mentioned vertical wall is a formulated majority cavities in the wall surface, which cavities have a basis mould essential in the form of a first isosceles triangle with the basis turned downward and the opposite point turned up and which cavities prove to have a depth curve, that stretches himself from the triangle's basis to the opposite point and that begins and ends shallow and reach a maximum depth essential midway between the basis and the opposite point.
It shows itself amazing that cavities with it in previous paragraph the described mould bring increased turbulent along the accumulator's vertical wall, what in turn improves the convection. This does that the heat storage comes to levels faster than at the well-known accumulator entire without increase the costly flanges and fans.
The wide heat accumulator according to the invention is it first equal parting take the triangle's legs especially curved toward the triangle's centers, what joints in the air power against triangle's centers.
Mentioned opposite point of the first equal parting take the triangle is suitable blunt. This means that the heated air from triangle's centers receives a lower density and gets up against triangle's point, through the blunt opening facilitates that the air's moves up from the cavity.
The cavity's depth curve stretches itself in sideway especially right to out to the first isosceles triangle's legs, at which the cavities at these legs has precipitous sidewalls. The precipitous sidewalls get the air to pass over depth huddling used to without influencing the air in the cavity.
Especially stretches itself from a central batch of the first equal parting to take the triangle's basis against the opposite point and in level with the container's wall surface a surface batch, as essential has the mould of a second isosceles triangle, that has same basis that it first equal parting to take the triangle but only is approximately the half so long and that has a opposite point approximately midway between the first equal parting to take the triangle's basis and opposite point. This means one increased air speed in to the cavity's lower leg, since the air follows an input radius that passes on in a concave radius, what ends in first triangle's approximate centers.
The others equal parting take the triangle's legs is suitable curved toward the triangle's center, what joints in the air power against triangle's center.
Mentioned opposite point of the other equal parting take the triangle is bulging . From triangle's center against the point is bottom accordingly (that is to say) especially built with a convex radius in order to the air will be forced up from the cavity's center to the triangle's upper blunt point.
The depth curve stretches itself inside evil suitable right in to the legs and the opposite point of the other isosceles triangle and the cavities at these legs and this point has suitable precipitous walls. This gets the air that sideways flow over depth huddling used to without influencing the air in the cavity.
The heat accumulator according to the invention constitutes especially one of several lamella of one lamellacurtain, that is intended to be suspended in a room in a platen surface. It can at such use positive contribute to energy housekeeping in particular also during relations with relatively little sunshine and low winger temperatures.
Short description of blueprint
Below is described a presentations of the preferred embodiment of the invention with the aid of enclosed blueprint. On this shows:
Fig 1 one cross-section view through a heat accumulator according to the invention,
Fig 2 one topview of a cavity in one wall surface off this,
Fig 3 one along- section view through this cavity,
Fig 4 one cross-section view through this cavity's two legs,
Fig 5 one perspectiveview with hidden and highlighted batches.
Description of the preferred embodiment
The on the blueprint showed preferred embodiment of the invention is a heat accumulator 9 in the form of one lamellacurtain, that is suitable for temporarily storage of heat at a temperature surpluses, for example daytime, with the aid of a phase change material, as glauber - or other PCM-salt, and for dispose of the temporarily stored heat at a temperature deficit, for example at night. Accumulator 9 include a container 7, that is done of a material with good heat management ability, as aluminum, and has at least one vertical wall 3, that on the outside has contact with the atmosphere air and on the inside has contact with mentioned phase change material 10, that is held in that. On the outside of mentioned vertical wall 3 is a formulated majority cavities 6 in the wall surface, which cavities have a basis mould
essential in the form of a first isosceles triangle with the basis turned downward 4 and the opposite point turned up 2. The cavities prove to have a depth curve, that stretches itself from the triangle's basis to the opposite point and that begins and ends shallow and reach a maximum depth 1 essential midway between the basis and the opposite point. It constitutes one of several lamellae of one lamellacurtain, that is suitable to be suspended in a room in a platen surface. Lamellae are assembled in modules about approximately 5 pes lamellae. Each lamella is twisting in the length arbor with 180 degrees' angle, in order to part's has possibility to follow the sun slant during the day part's to prevent insight and sunbeam. The aim with the cavities 6 in the vertical wall surface 3 is that in each cavity's center 1 increase the air's temperature, it happens through that the heat from the flange 8 transfers more heat to the cavity's center compared with the area around. It means that different temperatures arise along the accumulator's surface and in the cavities. A higher temperature arises on the surface in the cavity's center 1 and is transmitted over to the air. The hot air with lower density rough up against the cavity's upper bulging surface 2, one under pressure is created in the cavity's center and the pressure equalisation be sought with cool air from the cavity's lower part 4. The entire process creates a turbulensce along the container's wall 3.
The system is run of the internal heat storage 10 until temperature - the difference is levelled out on the inside and the outside of the heat accumulator 9.