CN114017837A

CN114017837A - Radiant heating suspended ceiling heated by solar energy

Info

Publication number: CN114017837A
Application number: CN202111507842.2A
Authority: CN
Inventors: 王子云; 朱甲; 王墨馨; 陈星百; 张�诚
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-02-08

Abstract

The invention discloses a radiant heating suspended ceiling heated by solar energy, which structurally comprises: radiation heating furred ceiling, heat pipe, outer wall body, window shade support. The solar heat collector combines the solar heat collecting process and the heat conducting process of the heat pipe, and transfers the solar radiation heat received by the outer wall of the building to the internal ceiling of the building and stores the solar radiation heat; at night, the suspended ceiling in the building emits the stored heat to the indoor space, and the room is continuously heated. The invention has the characteristics of high solar energy utilization rate, obvious indoor temperature increase, small daily fluctuation of the room temperature, no consumption of other energy sources except solar energy and the like.

Description

Radiant heating suspended ceiling heated by solar energy

Technical Field

The invention belongs to the technical field of building radiant heating suspended ceilings, and particularly relates to a radiant heating suspended ceiling heated by solar energy.

Background

China is the largest energy consuming country in the world and accounts for 23% of the energy consumption of the world. The building operation energy consumption accounts for 21-24% of the total energy consumption of China's society, and the proportion of the building energy consumption is continuously improved along with the deepening of the industrialization degree of China. Therefore, the building energy-saving development is promoted, and the building energy-saving building has important practical significance and profound strategic significance for realizing green development of China.

Solar energy is one of the most potential-developing, clean and environment-friendly green energy sources nowadays as an inexhaustible clean energy source. In the solar energy utilization technology, solar energy photo-thermal utilization is a common application form, solar energy is fully utilized to reduce heating load, and the method is an effective way for realizing near-zero energy consumption of buildings.

The existing radiant heating technology adopts a boiler for heat supply, and more non-renewable energy sources such as coal, natural gas and the like are combusted, so that the resource waste is serious, and the environmental pollution can be caused. Therefore, it is necessary to design a radiant heating ceiling heated by solar energy, so that the energy consumption of the building is reduced while the indoor heating requirement is met.

Disclosure of Invention

The invention aims to provide a radiant heating ceiling heated by solar energy, which is mainly used for indoor heating in winter, and the energy input end of a system only uses solar energy without consuming other energy.

The invention relates to a heat pipe, which is characterized in that the solar radiation heat of an outer wall of a building is transferred to a ceiling in the building by utilizing the characteristics of high thermal diode performance and high heat transfer coefficient of the heat pipe, the outer wall of the building is used for heat preservation and solar heat collection, and the ceiling in the building is used for heat storage and heat release. In winter and daytime, solar radiation heat received by the outer wall of the building is transferred to the internal ceiling of the building and stored through the combination of a solar heat collection process and a heat conduction process of the heat pipe; at night, the heat pipe does not work, and the suspended ceiling in the building discharges the stored heat indoors to supply heat to rooms. In summer, the roller shutter falls down to shield sunlight, and the heat pipe stops working, so that the increase of the heat load of the building is avoided. The invention has the characteristics of high solar energy utilization rate, obvious indoor temperature increase, small daily fluctuation of the room temperature and the like, and only consumes solar energy and does not consume other energy sources.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the invention provides an embodiment of a ceiling for heating by utilizing solar heating radiation, which comprises the following components: radiation heating furred ceiling, heat pipe, outer wall body, window shade support.

The radiant heating ceiling is composed of a core material made of a solid-solid phase change energy storage material and a surface material made of gypsum. The solid-solid phase change energy storage material realizes macroscopic solid-solid phase change by using a hard section and stores energy by using polyethylene glycol as a soft section. The solid-solid phase change energy storage material is uniformly mixed in gypsum. The gypsum is used as the outer layer of the sandwich structure, and under the matching of sandwich materials, the gypsum meets the strength requirement of the suspended ceiling, and meanwhile, the ideal energy storage effect is realized. The surface material and the core material can be compounded by fixing with bolts or the like, bonding with an adhesive, direct casting compounding or the like. In the embodiment, in order to match the pipe burying of the heat pipe, a casting compounding method is adopted.

The heat pipe is formed by arranging a plurality of micro heat pipes. The micro heat pipe is internally filled with a circulating working medium and comprises an evaporation section and a condensation section, the evaporation section is arranged on the outer wall body, the surface of the evaporation section is provided with a heat absorption coating or a heat collection piece for absorbing solar radiation energy to heat the circulating working medium, and the condensation section is buried inside the radiation heating ceiling so as to release the heat of the circulating working medium into the radiation heating ceiling. The micro heat pipe buried in the radiant heating ceiling extends upwards in an inclined mode along the direction from the evaporation section to the condensation section. The number, density and area proportion of the micro heat pipe buried pipes are determined according to local meteorological resource conditions and room heat supply requirements.

The outer wall body is one side of a building, and the side of the outer wall body with the largest total solar radiation energy is usually selected as the building outer wall.

The shading curtain is a movable rolling curtain, the movable rolling curtain is folded in winter, and the sun directly irradiates the heat pipe arranged on the outer wall body. In summer, the movable roller shutter falls down to shield the heat pipe on the outer wall body, so as to avoid being directly irradiated by the sun.

The support of the light-shading curtain is arranged on the outer wall with the heat pipes for supporting the light-shading curtain.

The invention has the characteristics and beneficial effects that:

1. the invention provides a radiant heating ceiling heated by solar energy, which utilizes a high-efficiency heat transfer element heat pipe to transfer solar radiant heat of an outer wall body of a building to an inner ceiling of the building. Compared with a conventional building, the internal surface of the indoor heat-releasing enclosure structure is changed from a south wall to a ceiling, so that the temperature in a room is more uniform, and the thermal comfort of the room is improved. The thermal diode nature of heat pipe has decided it is out of work night, avoids becoming the heat dissipation part, and the furred ceiling is continuously exothermic, compares conventional building and has effectively prolonged the time that envelope released heat to indoor in one day.

2. The quantity, density and area proportion of the heat pipe embedded pipes can be determined according to local meteorological resource conditions and room heat supply requirements, so that the actual total heat storage and release amount of the suspended ceiling is designed, the indoor thermal environment is improved, and fossil energy consumption caused by heating in winter is reduced.

3. The radiation heating ceiling adopted by the invention is made of the phase-change material, absorbs and stores heat in the daytime, prevents the room temperature from rising rapidly due to excessive heat supply, discharges the stored heat to the indoor by the radiation heating ceiling at night, prevents the room temperature from reducing too much at night, can effectively reduce the daily fluctuation of the room temperature, and is controlled in a thermal comfort area of a human body.

4. The shading curtain adopted by the invention can shield solar radiation irradiating on the evaporation section of the heat pipe when the solar altitude is higher in summer, thereby effectively avoiding the condition of overheating of a room in summer, improving the indoor thermal environment in winter and simultaneously not influencing the thermal comfort of indoor personnel in summer.

Drawings

Fig. 1 is a schematic view of the overall structure of an embodiment of a radiant heating ceiling using solar heating according to the present invention in the winter season.

Fig. 2 is a schematic diagram of the overall summer structure according to the embodiment of the present invention.

Fig. 3 is a perspective view of a winter system in accordance with an embodiment of the present invention.

Fig. 4 is a perspective view of a summer system in accordance with an embodiment of the present invention.

Fig. 5 is an isometric perspective view of a radiant heating ceiling with heat pipes according to the present invention embedded therein.

FIG. 6 is a front perspective view of a radiant heating ceiling with heat pipes according to the present invention embedded therein.

FIG. 7 is a side perspective view of a radiant heating ceiling with heat pipes according to the present invention embedded therein.

In the figure: the heat pipe type solar energy heat supply system comprises a radiation heating suspended ceiling, 2 heat pipes, 3 outer wall bodies, 4 window shades and 5 window shade supports.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.

Examples

Referring to fig. 1 to 7, the present invention provides an embodiment of a ceiling for heating by solar heating radiation, including: radiation heating furred ceiling, heat pipe, outer wall body, window shade support.

The radiant heating suspended ceiling 1 is composed of a solid-solid phase change energy storage material serving as a core material and gypsum serving as a surface material. The solid-solid phase change energy storage material realizes macroscopic solid-solid phase change by using a hard section and stores energy by using polyethylene glycol as a soft section. The solid-solid phase change energy storage material is uniformly mixed in gypsum. The gypsum is used as the outer layer of the sandwich structure, and under the matching of sandwich materials, the gypsum meets the strength requirement of the suspended ceiling, and meanwhile, the ideal energy storage effect is realized. The surface material and the core material can be compounded by fixing with bolts or the like, bonding with an adhesive, direct casting compounding or the like. In the embodiment, in order to fit the pipe laying of the heat pipe 2, a cast-in-place method is adopted.

Furthermore, the radiation heating ceiling 1 is a heat accumulator, so that heat conducted by the heat pipe is stored through phase change while radiation heating is performed to the inside of the room in the daytime, and radiation heating is continuously performed to the inside of the room at night, so that fluctuation of room temperature in the room all day long is reduced.

The heat pipe 2 is formed by arranging a plurality of micro heat pipes. The micro heat pipe is filled with a circulating working medium, the micro heat pipe comprises an evaporation section ab and a condensation section cd, the evaporation section ab is arranged on the outer wall body 3, a heat absorption coating or a heat collection piece is arranged on the surface of the evaporation section ab and used for absorbing solar radiation energy to heat the circulating working medium, and the condensation section cd is buried inside the radiant heating ceiling 1 so as to release the heat of the circulating working medium into the radiant heating ceiling 1. The micro heat pipe buried in the radiant heating ceiling 1 extends obliquely upward along the direction of the evaporation section ab toward the condensation section cd. The number, density and area proportion of the micro heat pipe buried pipes are determined according to local meteorological resource conditions and room heat supply requirements.

Further, the heat pipe 2 of the embodiment is formed by a plurality of micro heat pipes which are not communicated with each other, are closed and are all in an L shape, and are arranged in a close and parallel manner, referring to fig. 6 and 7, the heat pipe 2 is divided into an evaporation section ab and a condensation section cd, and the L-shaped folding point is used for distinguishing the evaporation section ab from the condensation section cd, referring to fig. 5 and 6. The heat pipe 2 is filled with a circulating working medium, and the circulating working medium flows in the closed cavity of the heat pipe 2. The circulating working medium filled in the heat pipe 2 is generally acetone, R141b, ethanol and other substances and mixtures thereof. The evaporation section ab of the heat pipe 2 is located on the outer wall 3, so that the evaporation section ab of the heat pipe 2 forms a plane attached to the outer wall 3, see fig. 1 and 5. The condensation section cd of the heat pipe 2 is buried inside the radiant heating ceiling 1, and transfers heat to the radiant heating ceiling 1 through a heat conduction manner, see fig. 5 to 7.

Further, in order to realize the gravity diode property of the heat pipe 2, the evaporation section ab of the heat pipe 2 is vertically arranged, and the condensation section cd is obliquely arranged. The angle of inclination between the flow direction of the working medium in the condensation section cd and the horizontal direction is greater than or equal to 3 ° and less than 15 °, see fig. 7.

Further, the surface of the evaporation section ab of the heat pipe 2 is provided with a heat absorption component. The heat absorbing component arranged on the surface of the evaporation section ab of the heat pipe 2 can be a heat absorbing coating sprayed on the surface of the evaporation section ab of the heat pipe 2, such as heat collecting paint or black paint. The heat absorbing component disposed on the surface of the evaporation section 11 of the heat pipe 2 may also be a heat collecting member, such as a heat collecting plate. The evaporation section ab of the heat pipe 2 receives solar radiation in the daytime, and the absorption of the heat of the solar radiation is improved through the heat absorption part.

The outer wall body 3 is one outer wall of a building, and the outer wall body is usually selected from one outer wall of the building with the largest total solar radiation energy.

The shading curtain 4 is a movable rolling curtain, the movable rolling curtain is folded in winter, and the sun directly irradiates the heat pipe arranged on the outer wall body. In summer, the movable roller shutter falls down to shield the heat pipe on the outer wall body, so as to avoid being directly irradiated by the sun.

Further, the window shade 4 is located on the outer wall body 3 above the evaporation section ab of the heat pipe 2, and when the movable roller shade falls down, the movable roller shade completely shades the heat pipe on the outer wall body to avoid being directly irradiated by the sun, see fig. 2 and 4, so as to avoid causing indoor overheating when the solar altitude angle is high in summer.

The window shade bracket 5 is arranged on the outer wall 3 with the heat pipes and supports the window shade 4.

The working principle is as follows:

during the winter and the daytime, solar radiation irradiates the surface of the evaporation section ab of the heat pipe 2 sprayed with the heat absorption coating, and the heat absorption coating with high absorptivity for the solar radiation absorbs a large amount of solar radiation heat.

The evaporation after 2 inside working mediums of heat pipe absorb the heat in evaporation zone ab department, the production carries thermal steam, steam upwards flows along the 2 evaporation zone ab of heat pipe of vertical setting to it is exothermic to run into the condensation when the lower radiant heating furred ceiling 1 of temperature is met in condensation zone cd department of heat pipe 2, gives radiant heating furred ceiling 1 with the heat transfer, and the condensation of working medium steam, the liquid drop of formation falls back to the evaporation zone ab of heat pipe 2 under the action of gravity. The heat is continuously circulated, and the heat transfer from the evaporation section to the condensation section is completed.

The radiant heating ceiling 1 absorbs heat released by the condensation section cd of the heat pipe 2, the temperature of the wall surface of the radiant heating ceiling 1 rises gradually, and the heat is transferred to indoor air through heat convection, so that the room temperature rises. Meanwhile, the solid-solid phase change energy storage material in the radiant heating ceiling 1 realizes macroscopic solid-solid phase change by a hard section, and the polyethylene glycol soft section stores heat.

At night in winter, because of no solar radiation irradiation, working media in the heat pipe 2 are not subjected to heat absorption vaporization and are in liquid states, and are always positioned in the evaporation section ab of the heat pipe 2 under the action of self gravity, so that circular flow cannot be formed. The radiant heating suspended ceiling 1 continuously releases heat absorbed and stored in the polyethylene glycol soft section in the daytime, and continues to supply heat to the indoor space.

In summer, the shading curtain 4 falls down, and because the solar altitude angle is higher, the shading curtain 4 shields the solar radiation irradiating the evaporation section ab of the heat pipe 2, and the heat pipe 2 is prevented from leading the absorbed solar heat into the indoor space to cause overheating.

While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an utilize radiant heating furred ceiling of solar heating which characterized in that: comprises a radiation heating ceiling, a heat pipe, an outer wall body, a window shade and a window shade bracket.

2. A radiant heating ceiling as claimed in claim 1, wherein: the radiant heating ceiling consists of two parts, namely a solid-solid phase change energy storage material as a core material and gypsum as a surface material.

3. A heat pipe as set forth in claim 1 wherein: the heat pipe is formed by arranging a plurality of micro heat pipes.

4. The micro heat pipe of claim 3, wherein: the micro heat pipe is L-shaped.

5. The micro heat pipe of claim 4, wherein: the micro heat pipe is divided into an evaporation section and a condensation section, and an L-shaped break point is used for distinguishing the evaporation section from the condensation section.

6. The micro heat pipe evaporator end of claim 5, wherein: and a heat absorption coating or a heat collection piece is arranged on the surface of the evaporation section of the micro heat pipe.

7. The micro heat pipe condenser section of claim 5, wherein: the micro heat pipe condensation section is buried inside the radiant heating ceiling.

8. The micro heat pipe condenser section of claim 7, wherein: the micro heat pipe condensation section buried in the radiation heating ceiling is upwards obliquely and extends along the direction of the evaporation section towards the condensation section, and the inclination angle is larger than 3 degrees and smaller than 15 degrees.

9. The exterior wall body of claim 1, wherein: the outer wall body is the building outer wall with the largest total solar radiation energy.

10. The shade of claim 1, wherein: the window shade is a movable roller shutter which is folded in winter and put down in summer.