SE502791C2 - Powerful heat magazine - Google Patents

Abstract

The heat magazine is charged by night when the cost of electricity is low and produces heat during the daytime without use of electricity. The smelt heat in a metal, pref. aluminium is used in that it is enclosed in an airtight capsule so that oxidation of the metal does not occur and room air either flows past four elements into the room or emits its heat in that a plate (8) (heat exchanger) conducts heat without room air (7) being overheated. The warm air in the heat magazine is not fed out into the room without passing against a plate which is then warmed, whereby room air (5, 7) is fed past the warm plate (8) and in this way heats the room without bad-smelling overheated air flowing out into the room.

Description

502 791 2 A heat storage can be built up of heating modules fig. 2 and 3 or consist of larger modules, here called troughs, in which melt heat is stored fi g , 7, 8 and 10. Fig. 2 shows that a heating module can consist of one outer casing (1), an electric heating coil (5), encapsulated in a stainless steel tube (3), wherein the casing constituting steel lining (1) holds about 85% aluminum (4), and the residue noble gas or vacuum (2), to prevent oxidation of the metal (4). The electric heating rod heats up the metal 4 to approx 658 ° C (melting heat is about 82 kcal in kg).

Thus, for a heat storage consisting of, for example, 80 kg of aluminum about 5,510 kcal in digestive tract, which corresponds to about 6.4 Kwh, to this specific heat that is about 9.7 Kwh, ie total heat the content will be about 16 Kwh.

Figures 3a and 3b show a heating element for dwellings that may have dimension LxHxT = 900 x 600 x 130 mm and which is located below the window which is the rule. Figure 3a on the left shows that the heat storage is built up of troughs as described in Fig. 4.

The air transport in the magazine fig.3 is based on the thermal movement of the air.

Cold air (13) flows into and past heat storage (see arrow 14), whereby the air is heated and flows out at (6), if the flap (9) is in its upper location. The flume air (15) is sucked into the duct thanks to the thermals that formed at (7). When the thermostat senses that set room temperature reached, close the flap (9) until the thermostat again signals that the flap must be opened.

Fig. 3a further shows that the heating rods (23) in each trough do not run through the wall of the trough where the level of melt is but above the level, this for to reduce the different length expansion differences between steel and aluminum. For the same reason, the sides of the trough are skewed so that the length extension of aluminum does not get full force when it is aggravated from the cold state because it expands considerably more than the steel make. The trough is heated and cooled once a day as previously shown, (Fig. 1), and the fatigue of the constituent parts must therefore minimized.

The flue air (15), is slightly colder at the floor and is called here cold air (13), enters and encloses the capsule (21), and heats up and rises (14), after which it flows out at (6), if the flap (9), is open and the room air (15), mixes at (6), and flows upwards at (7), and out in the room (8). The capsule (21) is mounted on a heat insulating disc (10).

Fig. 4a shows a heating module in the form of a trough, seen from the side and figure 4 b from above. The electric heating element has a spiral shape (25), which takes up the differences in length extension between steel and aluminum. At each melting sequence occurs a sharp contraction, then the heat layer cooled down, but thanks to the fact that the electric heating rod is not exposed to differences in length extension (resiliently anchored electric heating element) becomes the thermal stresses small and the thermal fatigue small ..

Figures 5 a and 5 b show a heating magazine from the side and from the front without insulation (only the heating magazine), intended for central heat source in a b ostadshus with a capacity of about 70 -100 Kwh. The magazine consists of capsule (21), expansion space (22), electric heating electrode (23), aluminum (24), and resilient clamping (25), of the electrode.

Fig. 6 shows a heat storage through which the hot air does not circulate the magazine without the room air (15), strokes past the hot plate (18 "), whereby it heats up and in this way heats the surroundings as it flows out at (11 '). The flap (10) regulates the amount of hot air into the room.

Figs. 7 and 8 show a larger heat magazine. Fig. 7 shows a section from the side and Fig. 8 from above. The magazine consists of an outer cover of steel sheet with sloping sides and pleated top and bottom (77, 78, 79) to mitigate the thermal expansion between steel and aluminum.

The heating coil (75) is encapsulated in a stainless steel tube (73). The area above the aluminum (72) is filled with suitable gas that prevents oxidation, e.g. argon.

Figs. 9a and 9b show a hot air producing heating element with heat storage (99), and hot air heat exchanger (98 ').

The hot air in the elements circulates acc. the arrows (94), ie past the magazine up in the tube (98), and then down in the magazine.

The second air stream consists of room air entering the duct (91), and is heated by the tube (98), the hot air flowing out at (93), thanks to the thermals in the hot air Fig. 10 shows a heating magazine with a larger capacity, ie the entire villa daily needs can be stored during the night (approx. 8 hours a night).

The magazine has an outer dimension of 0.6 x 0.6 m and a height of about 1.6 m. It is placed next to the existing heat source, eg electric boiler (200), and this means that the heating magazine primarily heats the house. If the heating magazine does not have sufficient capacity, for example for much cold days, the electric boiler automatically enters and provides support heat ..

The hot air in the element circulates in the same way as described previously, ie from magazine (194), to the tube (198), by the fan (195), which controlled by a thermostat. The water-filled pipe loop (204) discharges hot water with the pump (205).

A room element for residential heating Figs. 3a and 3b with core off aluminum (800x600x50 mm) gets a dimension after insulation of approx 900x700x140 mm. Tests have shown that you achieve about 14 Kwh stored heat after 8 hours of charging.

Basic data is: s: xD -à 502 791 z, - Specific heat Melting heat Melting point x) Weight Sp. weight kcal / kg kcal / kg ° C kg / element kg / m3 ALUMINUM 0.214 and 82 658 64.8 2.7 Steel 0.114 49 about 1300 187.2 7.8 Granite 0.200 - ca 1400 72.0 2.5-3.1 Zinc 0.092 28 419 170.4 7.1 Water 1.0 24 0.998 Heat storage with different materials in the active magazine has the following capacity: based on the volume 800 x 600 x 50 mm ceramic x 8h.

For water, G x c x t = 1,080.

Specific heat Melting heat Total kcal / element kcal I element Kwh I element Steel 1 1220 unrealistically high approx. 13 temperature Granite 8880 "ca 10 Alumlnlum 8400 + 5,510 = ca 14 Water 1,080 ---- 1, 2 The only material that has a suitable melting point and is relatively high melting heat value is thus aluminum.

With a heat content of a total of 16 Kwh can can an element (according to above 800 x 600 x 50 mm) produce heat for a whole day without further replenishment with the whole 675 W I h.

Claims (3)

PATENT REQUIREMENTS Heat reservoirs which are preferably charged during the night when the electricity price is low, and which during the day produce heat without electricity consumption, CHARACTERIZING THEREFORE, that the solidifying heat of a metal, preferably (aluminum) is utilized by enclosing it in an airtight capsule (1 ), so that oxidation of the metal does not take place and that the room air gives off its heat by a plate (18 “) (heat exchanger) conducting the heat without the room air (7) overheating. Heat magazine according to Claims 1 and 2. CHARACTERISTIC DELETE, that an electric heating rod (3) has a resilient clamp (5), which prevents thermal fatigue of the rod, one end of which is welded to the upper cover, and the lower end of which is fixed in aluminum. and between these attachment points, resilient insp. (5) (molten or solid form from time to time) due to different length expansion coefficients between Al / steel. Heat magazine according to Claim 1. CHARACTERISTICS OF THAT, that hot air in the magazine circulates around the magazine (94), past a heat-emitting duct such as a pipe (98), by means of a fan 95 which is controlled by a thermostat which senses the heat demand of the room. 1