CN105042903A - A concrete air heat storage - Google Patents

Abstract

The invention discloses a concrete air heat reservoir which is connected with an air heat collector, air is used as a heat transfer medium, a heat storage space is arranged in the heat reservoir, the heat reservoir is provided with an input port and an output port communicated with the internal heat storage space, and a plurality of concrete heat storage blocks are arranged in the heat storage space in an array manner. The concrete heat storage blocks are arranged to be convenient for adopting a modularization method, so that the heat storage capacity of the heat storage device can be conveniently adjusted, and the concrete heat storage device is suitable for occasions such as distributed energy utilization and the like.

Description

A concrete air heat storage

technical field

The invention relates to a solar heat storage device which uses concrete as a heat storage material and air as a heat charging and heat release medium, which can be used in a solar air boiler and belongs to the field of solar heat utilization.

Background technique

The air density is low and the temperature rises quickly. Due to the low density, its heat transfer capacity is poor, the specific heat is low, and the heat storage effect is not good. Moreover, due to the small specific heat capacity of the air system, it is easy to be fluctuated by solar radiation, which brings the air in the collector temperature fluctuations. At present, molten salt or pressurized heat preservation containers are generally used for heat storage. The heat storage cost of this technical means is high, and due to the low heat transfer coefficient of air, a heat exchanger with a large heat transfer area is required to achieve high power. It is not conducive to the popularization and use of air boilers.

Contents of the invention

In order to overcome the deficiencies in the prior art, the invention provides a concrete air heat storage device with extremely low heat storage cost and high heat release power.

The present invention solves the above technical problems through the following technical solutions:

A concrete air heat storage device, which is connected with an air heat collector, uses air as the heat transfer medium, and includes a heat storage device with a heat storage space inside the heat storage device. The input port and the output port of the thermal space, the thermal storage space is provided with a plurality of concrete heat storage blocks in an array.

As an improvement of the present invention, the concrete heat storage block is in the shape of a block or a sheet.

As an improvement of the present invention, the plurality of concrete heat storage blocks are placed in a spaced array in the heat storage space through supports, and the supports are metal or concrete.

As an improvement of the present invention, the plurality of concrete heat storage blocks are hoisted in the heat storage space through a connecting piece, and the connecting piece is metal or concrete.

As an improvement of the present invention, the concrete heat storage block is a pure concrete component or a concrete component with steel bars.

As an improvement of the present invention, an insulation layer is provided outside the heat storage space.

The beneficial effect of the present invention is that the heat storage space of the heat storage device of the present invention is provided with a plurality of concrete heat storage blocks arranged in an array. The heat storage material formed is extremely cheap, and heat storage is carried out by placing small pieces of concrete in the heat storage space, which reduces the resistance of air flow, thereby greatly reducing the cost of power consumption and operation. The heat exchange structure composed of multiple concrete heat storage blocks makes The heat exchange surface area is greatly increased, and the heat exchange power is increased. In terms of layout, the concrete heat storage block is convenient to adopt a modular method, so that the heat storage capacity of the heat storage device can be easily changed flexibly, which is suitable for occasions such as distributed energy consumption.

Description of drawings

Fig. 1 is a schematic diagram of the connection structure between the present invention and an air heat collector.

Fig. 2 is a structural schematic diagram of the concrete heat storage block of the present invention.

Detailed ways

The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

Figure 1 is a schematic structural diagram of this embodiment after it is connected to an air heat collector 1. This embodiment includes a heat storage device 2, which has a heat storage space inside, and the heat storage device 2 has a connection to the The input port 7 and the output port 8 of the internal heat storage space, the heat storage space is provided with a plurality of concrete heat storage blocks 3 in an array, the concrete heat storage blocks 3 are block-shaped, and the plurality of concrete heat storage blocks 3 is hoisted in the heat storage space by steel bars 9, the concrete heat storage block 3 is a concrete member with steel bars, an insulation layer is provided outside the heat storage space, and the heat storage device 2 is also provided with air The inlet 5 and the outlet 6 of the heat collector 1 are connected, and an air compressor 4 is arranged between the heat storage 2 and the air heat collector 1 .

working principle:

The present invention uses concrete as the heat storage material, and concrete blocks are made into the heat storage space to form the interior of the heat storage device 2 . During heating, under the power of the air compressor 4, hot air flows through the gaps between the concrete blocks to heat the concrete, and the air flows out from the outlet 6 and returns to the air heat collector 1 to be heated, and then returns to the storage tank from the inlet 2. In heater 2, a cycle is formed. When releasing heat, cold air enters the heat accumulator 2, passes through the concrete space, and flows out of the heat accumulator 2 after being heated.

The present invention is connected with the air heat collector 1 to form a solar air boiler system, wherein the air heat collector 1 receives solar radiation, the heat absorber of the air heat collector 1 is heated, and the air enters under the action of the air compressor 4 The air heat collector 1 is heated into hot air and then enters the heat storage device 2. In the heat storage space inside the heat storage device 2, concrete heat storage blocks 3 arranged in an array are placed, and the hot air gradually heats the concrete heat storage blocks 3. Then flow out, after the heating is completed, the cold air enters from the input end 7 of the heat storage device 2, is heated and becomes hot air, and then flows out from the output end 8 for supply to users.

The main feature of the present invention is that: inside the heat storage device 2, a plurality of small concrete heat storage blocks 3 are evenly spaced and arranged in the heat storage space, and the concrete heat storage blocks 3 are connected by steel bars 9 and can be formed in intervals. Air turbulence and increase the heat exchange area to increase the charging and discharging power. During heating, under the power of the air compressor 4, hot air enters the heat accumulator 2 from the inlet 5, flows through the intervals of multiple concrete heat storage blocks 3, heats the concrete, and the air flows out from the outlet 6 of the heat accumulator 2 After returning to the air heat collector 1 to be heated, it enters the heat storage device 2 through the inlet 5 to form a cycle. When releasing heat, cold air enters the heat accumulator 2 through the input port 7, flows through the intervals of multiple concrete heat storage blocks 3, and flows out of the heat accumulator 2 through the output port 8 after being heated.

The concrete heat storage block 3 can be made of pure concrete or reinforced concrete, and the reinforced concrete can increase the thermal conductivity of concrete. The concrete heat storage block 3 can be in the shape of a block or a sheet, and can be placed on the interlayer through a bracket, or can be hung in the heat storage space by a steel bar 9 to form a hoisting structure for air circulation. The support can be metal or concrete.

The outstanding advantages of the present invention are: the heat storage material of the heat storage device of the present invention is extremely cheap, and the heat storage is carried out by placing small pieces of concrete in the heat storage space, which reduces the resistance of air flow, thereby greatly reducing the power consumption and operating costs, The heat exchange structure composed of multiple concrete heat storage blocks greatly increases the heat exchange surface area and heat exchange power. In terms of layout, the concrete heat storage block is convenient to adopt a modular method, so that the heat storage capacity of the heat storage device can be easily changed flexibly, which is suitable for occasions such as distributed energy consumption.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (6)

1. A concrete air heat storage device, which is connected with an air heat collector and uses air as a heat transfer medium, is characterized in that it includes a heat storage device, and the inside of the heat storage device has a heat storage space, and the heat storage device The device has an input port and an output port connected to an internal heat storage space, and a plurality of concrete heat storage blocks are arranged in an array in the heat storage space. 2. The concrete air heat storage device according to claim 1, characterized in that, the concrete heat storage block is in the shape of a block or a sheet. 3. The concrete air heat storage device according to claim 1, wherein the plurality of concrete heat storage blocks are placed in the heat storage space in an array at intervals through supports, and the supports are metal or concrete. 4. The concrete air heat storage device according to claim 1, characterized in that the plurality of concrete heat storage blocks are hoisted in the heat storage space through connecting pieces, and the connecting pieces are metal or concrete. 5. The concrete air heat storage device according to claim 1, wherein the concrete heat storage block is a pure concrete component or a concrete component with steel bars. 6. The concrete air heat storage device according to claim 1, wherein an insulation layer is provided outside the heat storage space.