CN110762599A - Light phase-change heat storage floor heating and design method thereof - Google Patents

Abstract

The invention relates to a light phase-change heat storage floor heating and a design method thereof. Its characterized in that should warm up the structure and include: the bottom layer is a heat preservation layer (1), a pipe clamping module (2) is arranged above the heat preservation layer (1), the floor heating coil (3) is wound between clamping teeth above the pipe clamping module (2), phase change heat storage materials (4) are filled between the floor heating coil (3) and the clamping teeth of the pipe clamping module, and the top layer covers a floor (5). The novel floor heating system solves the problems of poor heat storage and poor heat conductivity of the traditional floor heating system, can prolong the continuous heating time by over 100 percent compared with the common floor heating system under the same experimental heating working condition without additional energy consumption, and has the advantages of simple process, low raw material cost, wide source and better economic benefit and social benefit.

Description

A light-weight phase-change thermal storage floor heating and its design method

technical field

The invention relates to a floor heating, in particular to a light-weight phase-change heat storage floor heating and a design method thereof.

Background technique

With the rapid development of my country's economy, people's living standards have been continuously improved, and living conditions have been improved. At the same time, building energy consumption has increased rapidly, and building energy consumption accounts for about 30% of the total social energy consumption, which intensifies the energy supply. tensions. In building energy consumption, heating and heating energy accounts for about 45%, which is the key area of building energy conservation. In order to reduce building energy consumption, it is necessary to save and open source. Therefore, relevant researchers in my country are working to expand the application scope of renewable energy in buildings. Solar energy is an inexhaustible clean energy source and one of the important energy sources that human beings can rely on for a long time. The use of solar thermal energy to heat buildings can achieve very good energy saving and environmental benefits. For a long time, it has been widely valued by all countries in the world. In the past ten years, the large-scale utilization technology of solar heating and heating in developed countries in Europe and North America has developed rapidly, and a large number of district heating and heating projects using solar energy have been built, and corresponding technical guidelines and design manuals have been compiled and published. Many cold areas in my country are very rich in solar energy. In order to make full use of this natural energy, the Ministry of Housing and Urban-Rural Development of my country and the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China jointly issued the "Technical Specifications for Solar Heating and Heating Engineering" (GB50495-2009) on March 19, 2009. Implemented on August 1, 2009.

Solar energy is an unstable heat source and will be affected by cloudy, rainy and snowy weather. The supply of solar energy varies in both quantity and time. Solar energy can only be obtained during the day, especially direct sunlight, and can only be obtained when it is sunny, and the energy in life is more concentrated in the morning and evening than during the day. If the solar energy can be temporarily stored and recycled when necessary, it can not only improve the convenience of energy but also expand the scope of application. Therefore, in response to this situation, the invention intends to design a phase-change thermal storage floor heater by combining new solid phase change materials, which can transfer the solar heat during the day to heating at night. If the heat supply fluctuation exceeds the capacity of the heat storage device, or the heat supply temperature is lower than the user's request, an auxiliary heat source can be set to supplement. Both the heat collection efficiency and the heat collection temperature are easier to drop in winter than in summer. Therefore, large-scale solar heat utilization systems generally use boilers or heat pumps as auxiliary heat sources.

At present, in my country's northwestern Sichuan, Tibet, Xinjiang and other regions, the temperature difference between day and night is large, the solar radiation intensity is high during the day, and the temperature at night is low. In order to make more rational use of solar energy and improve the utilization efficiency of solar energy resources, the application of thermal storage technology in buildings in the above-mentioned areas is also increasing. At this stage, the combined solar heating method is mostly the use of water tank heat storage to meet the night heating demand. For example, the public publication number CN201910091235 provides a heating solution using a water tank for heat storage, but it often needs to consume a certain amount of traditional energy in order to maintain the water temperature in a certain range during night heating, and the transmission of circulating water also requires power, which cannot really be realized at night. Zero-energy heating, and if this type of system is used in alpine regions, there is a risk that the water body will freeze due to insufficient insulation measures, which will cause the water circulation to stagnate, or even burst pipes. Another example is CN201720323159, which uses the water tank to store heat, and sends hot water to the coils of each room to heat in the form of hot air. However, this type of heat storage heating system also has the risk of water freezing, and it cannot achieve zero zero at night. Energy consumption heating. In order to better provide heating strategies for alpine regions, people are actively exploring the heating method of house structure heat storage to replace the traditional water tank heat storage mode. For example, publication number CN201510524099 provides a heating strategy for wall heat storage, which uses heat source heating and wall heat storage to heat the room at night, and can achieve zero-energy heating at night, but because it uses paraffin as the wall The bulk phase change heat storage material makes the invention often face the technical obstacles of material sealing and the difficulty of construction in practical application.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention designs a light-weight phase-change thermal storage floor heater.

The basic operation idea of the system is: in the daytime, the hot circulating water heated by a heating device such as a solar collector can be passed into the floor heating coil (3) to heat the phase change heat storage material (4), and a part of the heat is stored through the phase change. The thermal material is directly introduced into the floor (5) for instant heating of the room, and another part of the heat is stored in the phase-change heat storage material (4) in the form of latent heat of phase change. At night, the circulating water can no longer be fed, and the heat stored during the day by the phase-change heat storage material (4) can continue to continuously heat the room. With the efficient heat storage and release capacity of the phase change heat storage material, it is basically possible to achieve zero-energy heating of the room at night, so as to achieve the purpose of energy saving and emission reduction.

Wherein, the thermal insulation layer (1) is an extruded polystyrene thermal insulation foam board.

An aluminum foil reflective layer is closely attached to the surface of the foam board.

Wherein, the phase change heat storage material (4) is a mixture of paraffin wax and 80 mesh expanded graphite.

The mass proportions of the paraffin and 80-mesh expanded graphite are: 95% and 5%, respectively.

The phase-change heat storage material (4) is filled on the support frame module around which the floor heating coil (3) is wound.

Wherein, the floor heating coil (3) is clamped between the clamp teeth on the support frame module.

The supporting frame module is characterized in that the surface has two kinds of clamping teeth, long teeth and short teeth, which are arranged in a staggered manner.

The distance between the long teeth and the short teeth is equal to the outer diameter of the floor heating coil (3).

The thermal insulation layer is an extruded polystyrene thermal insulation foam board.

Wherein, the filling height of the phase change heat storage material (4) on the support frame module is the same as the height of the long teeth.

The advantages of the present invention are:

1. The phase change heat storage technology is used to realize the poor-time utilization of solar energy, which can produce obvious energy-saving benefits.

2. The floor heating can not only be combined with solar energy, but also well combined with other clean energy such as geothermal energy and wind energy. The structure is simple and can be used in a variety of energy structures.

3. The application of the floor heating system does not need to set up a large hot water storage tank, which saves investment.

4. The phase change heat storage material used has a wide range of sources, low price, stable physical and chemical properties, and large latent heat of phase change, so that the heating system using this material can truly realize zero-energy heating at night.

Description of drawings

Figure 1 is a schematic diagram of the phase change thermal storage geothermal layer.

In the picture: 1 thermal insulation layer; 2 supporting frame module; 3 floor heating coil; 4 phase change heat storage material; 5 floor.

Detailed ways

The present invention will be further non-limitingly described below in conjunction with the accompanying drawings and embodiments.

Local heating is a lightweight phase change thermal storage floor heating and its design method designed and invented for the climatic characteristics of cold climate and long low temperature weather cycle in plateau areas. During the daytime, hot circulating water heated by a heating device such as a solar collector can be passed through the floor heating coil (3) to heat the phase change heat storage material (4), and part of the heat is directly introduced to the floor through the phase change heat storage material ( 5) is used to instantly heat the room, and another part of the heat is stored in the phase-change heat storage material (4) in the form of phase-change latent heat. At night, the circulating water can no longer be fed, and the heat stored during the day by the phase-change heat storage material (4) can continue to continuously heat the room. With the efficient heat storage and release capacity of the phase change heat storage material, it is basically possible to achieve zero-energy heating of the room at night, so as to achieve the purpose of energy saving and emission reduction.

Further, the above-mentioned source for heating the thermal circulating water can be solar energy or geothermal heat with relatively high temperature.

Further, if the floor heating is used in the heating system of a large building, an auxiliary heater, such as a large boiler or a heat pump, can be added.

Further, the filling amount of the phase change thermal storage material should be determined according to the room load.

Further, if the room has higher requirements for the air preheating speed, graphene can be added to the above-mentioned phase change heat storage material, and the proportions of paraffin, 80 mesh expanded graphite and graphene are: 94% and 5% respectively. , 1% ratio.

Further, the floor can be wooden floor, tile floor or solid wood floor.

Further, the floor heating coil can be coiled in a loop shape, a double loop shape, or a serpentine shape, and the specific coiling method should be determined by the space characteristics of the room.

Further, if the floor heating is used in areas where solar energy resources are not abundant, in addition to using the solar collector as a heat source, a wall-hung boiler or electric heating can be added to store and heat the ground.

Further, if the floor heating is applied to an area with an electricity price difference, it can use low-cost electricity to heat the circulating water to heat the room at night and store heat for the heat storage material. Directly change the water heating to electric heating to improve energy efficiency.

Further, the materials used in the floor heating can also be used in various occasions, especially in the heating system in areas with cold winters and hot summers and abundant solar energy resources, such as Xinjiang, Gansu and other provinces, and can be used in the above-mentioned floor heating in winter. For heating, when the temperature is high in summer, the material can also be used in thermal insulation water tanks, and the hot water generated by solar energy can be stored in thermal insulation water tanks and used as domestic water. In addition, the high latent heat composite phase change heat storage material used in the system can also be used in the system of wall heat storage, roof heat storage and pipeline heat storage.

The present invention will be described in detail below with reference to specific embodiments.

For example, when the floor heating is used in ordinary residential houses in plateau areas, if the house is a low-rise bungalow, the solar collector can be placed on the roof to minimize the pipe sections exposed to the outdoors, and the pipe sections exposed to the outdoors must be treated. With sufficient insulation measures, a small gas-fired wall-hung boiler or an electric water heater can be installed indoors and connected to a solar collector as an auxiliary heat source. During the day, the heat of the hot circulating water is released to the indoor to the maximum extent through the floor heating coil, part of which is used for instant heating, and the other part is stored in the phase-change heat storage material. At night, the supply of circulating water is stopped, and the heat stored by the floor heating continues to heat the room. If the residence is a building, the application of the system is relatively limited. However, it can still be used for some units with a rising sun. The main difference in application is that the solar collector tube can be designed at the air-conditioning unit to replace the traditional blinds, which is not only beautiful, but also can efficiently utilize the solar energy.

Another example is when the floor heating is used in large public buildings in plateau areas, such as railway station halls. Due to the large roof space such as stations and airport terminals, solar collectors can be installed on the roof. At this time, the solar collector in the system is better to choose a plate collector, and the auxiliary heater can use a large boiler or air Source heat pump and plate collector can also lock the heat in the public space while collecting heat. The hot water is passed under the floor to release part of the heat and store the other part of the heat. It can also be used at night without energy consumption. Continuous and efficient heating of the interior.

The above descriptions are only examples of preferred embodiments of the present invention, and the parts that are not described in detail are the common knowledge of those of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present invention, such as the change of the ratio of phase-change heat storage materials, is also within the protection scope of the present invention.

Claims (7)

1. A light-weight phase-change thermal storage floor heating and a design method thereof, characterized in that the floor heating structure comprises: the bottom layer is an insulation layer (1), a support skeleton module (2) is arranged above the insulation layer (1), and the floor heating The coil (3) is coiled above the support frame module (2), the top of the floor heating coil (3) is filled with a phase-change heat storage material (4) to cover, and the uppermost layer is covered with a floor (5). 2 . The light-weight phase-change thermal storage floor heating and design method thereof according to claim 1 , wherein the thermal insulation layer is an extruded polystyrene thermal insulation foam board. 3 . 3 . The extruded polystyrene thermal insulation foam board according to claim 2 , wherein a thin reflective layer of aluminum foil is closely attached to the upper surface of the foam board. 4 . 4 . The light-weight phase change thermal storage floor heater and the design method thereof according to claim 1 , wherein the surface of the support skeleton module has two kinds of clamping teeth, long teeth and short teeth, which are alternately arranged in sequence. 5 . 5 . The pipe clamping teeth according to claim 4 , wherein the spacing between the teeth is equal to the outer diameter of the floor heating coil. 6 . 6 . The light-weight solar phase-change thermal storage floor heating system according to claim 1 , wherein the phase-change thermal storage material is a mixture of paraffin wax and 80-mesh expanded graphite. 7 . 7 . The mixture of paraffin wax and expanded graphite according to claim 6 , wherein, the mass ratio of the components of the mixture is: paraffin wax: expanded graphite=95:5. 8 .