CN2834080Y

CN2834080Y - Sensible heat-latent heat storage heating tube device for electric floor heating

Info

Publication number: CN2834080Y
Application number: CN 200520118227
Authority: CN
Inventors: 刘中良; 张明; 李晶; 李莉; 马重芳
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2005-09-02
Filing date: 2005-09-02
Publication date: 2006-11-01
Anticipated expiration: 2015-09-02

Abstract

The utility model relates to a sensible heat-latent heat storage heating tube device for electric floor heating, which belongs to a device applied in the electric floor heating. The utility model is additionally provided with a thermal storage tube or a thermal storage capsule in a heat generation tube section, and a heating medium is filled in the thermal storage tube or the thermal storage capsule. When heated or cooled, a heat storage medium generates phase change, which is a latent heat storage process. On the one hand, the heating medium is used as a fluid medium for transferring heat between a heat collecting surface or a heating surface and the heat storage medium, so heat transfer in the heat storage medium is enhanced; on the other hand, the heat storage medium generates temperature change following the heat storage or releasing process, which is sensible heat storing process. By the technology of the utility model, the heat transfer process in the heat storage medium can be obviously strengthened. Compared with a traditional latent heat storage heating tube with phase change, the utility model can increase the heat storage capacity of unit volume and reduce the volume of heat storage equipment. Thus, an electric heating floor has strong heat storage capacity, the economical efficiency is increased and the comfort degree is enhanced.

Description

A kind of sensible heat-latent-heat storage heating tube device that is used for under-floor electric heating

Technical field

The utility model relates to a new device that is applied in the under-floor electric heating.

Background technology

Floor heating is in recent years at the emerging a kind of heating system of China.Because it has plurality of advantages such as energy-conserving and environment-protective, construction a home from home, the saving interior space, is accepted by people just gradually.Floor heating mainly relies on the heat transfer free convection between radiation and floor surface and air, and effectively the warm oneself temperature in space of indoor bottom is high 1～2 degree centigrade when adopting radiator.And before the traditional heat-dissipating device generally was placed in window, this had also strengthened heat scattering and disappearing to the room external space.It is generally acknowledged that floor heating is than traditional heating mode energy-conservation 20%～30%.Thus, floor heating is a good approach of building energy conservation.Floor heating can improve indoor effective heating temperature, reduces the heat radiation of human body.Simultaneously, make the interior space produce temperature gradient, satisfy the needs of people " the warm head of foot is cold ", strengthen the comfort of human body along short transverse.We can say that floor heating is a kind of near desirable heating system.This kind heating system has also been saved the careat that radiator occupied, and the interior space is arranged seem convenient flexible.

Now common floor heating system generally with water as media.Heat provides and is divided into boiler central heating and electric heating dual mode.The electric heating mode has reduced the pollution of boiler smoke, has avoided troubles such as construction central heating system and service conduit, and has utilized the convenient of electric power conveying.Account under the background that the ratio of gross generation improves day by day at China's nuclear power, water power, can be described as a kind of heating system of economic environmental protection.And the electric heating floor construction is flexible, is not subjected to the restriction of central heating, and is also more convenient aspect adjusting and energy consumption measure.

At present, the pipe layout method of floor heating system comparative maturity.As shown in Figure 1, pipeline 4 materials are generally selected high molecule plastic tubing (as: crosslinked polyethylene pipe, crosslinked PAP, Polybutylene Pipe etc.) for use, in order to make heat to uploading, between pipeline 4 and structure sheaf 9, lay composite heat-insulating layer 8, and utilize bail 2 that pipe is fixed on the composite heat-insulating layer 8.The main effect of cast concrete layer 7 thereon is protection pipeline and supports, and can play the effect of conducting heat with accumulation of heat simultaneously, makes ground formation temperature radiation heating face comparatively uniformly.Pass through screed-coat 6 levellings again, just can directly lay ground floor 5 (as: flooring laminate, floor tile, timber floor etc.) in the above.In work progress, to note simultaneously installing the corner insulation material 1 at place, corner additional and in concrete layer, reserving dilatation joint 3.

The quality of electric heating floor heat storage performance is strong and weak directly related with comfort property often.There is the drawback of " cold " in the tradition under-floor electric heating process, and frequently regulates temperature control system, can influence floor useful life once closing.If the electric heating floor has good heat storage performance, can be easy to such an extent that the ground plate temperature is controlled in the optimum reelability quality, fluctuations in indoor temperature can be smaller.Simultaneously, good heat storage performance can make the accumulation of heat of electric heating floor utilization valley power.Such as, when night, electricity consumption of resident was generally less, carry out the floor accumulation of heat, utilize the floor to put aside daytime when electricity consumption of resident is generally bigger heat heating.This not only can alleviate the contradiction of peak of power consumption period power tense, improve the operational efficiency of whole electric power system, and because government generally all carries out the electricity consumption policy of peak and valley time valuation, thereby reduce the cost of electric heating greatly, so heat accumulating type under-floor electric heating technology have great economy value and Practical significance.

Adopt the electric heating floor of traditional paving mode, do not have heat accumulation function.Though cement mortar in the packing layer or crushed stone concrete have certain accumulation of heat effect.But the specific heat capacity of cement is less, and relies on the cement variations in temperature fully and realize the storage of heat, is complete sensible heat accumulation of heat.This obviously is difficult to reach the requirement of accumulation of heat electric heating floor heat storage performance.

Therefore, how making the electric heating floor have the new emphasis that good heat storage performance is this area research, also is the new direction of development.Advantage such as have the thermal storage density height, temperature persistance is good is compared in the latent heat of phase change accumulation of heat with the sensible heat accumulation of heat, but because phase-transition heat-storage medium heat conduction coefficient is little, heat transfer property is poor.So simple phase-transition heat-storage floor heating holds, exothermal efficiency is all very low, has influenced its practical application.Therefore, must adopt corresponding reinforcement technique to strengthen its diabatic process, and reduce its thermal storage density so greatly, make the latent heat of phase change accumulation of heat lose the high advantage of its heat storage capacity.How could improve the heat storage performance on electric heating floor better, how the latent heat of phase change heat accumulation method could be applied in the electric heating floor, all these is demanded urgently from structure and technical solving.

Summary of the invention

The utility model is intended to solve the problem of existing electric heating floor heat storage capacity deficiency, propose a kind ofly can overcome that latent heat of phase change heat-storing material conductive coefficient is little, the shortcoming of heat transfer property difference, effectively improve the comfortableness on electric heating floor, the floor sensible heat one latent-heat storage electric heating technology of economy.

We redesign the structure and the form of heating pipeline section of the prior art in of the present utility model, have added phase-transition heat-storage medium and heating agent therein, make it have very strong heat storage capacity.Its concrete scheme is: comprise pipeline 4 and be arranged on the heating cable 10 at pipeline center, be characterised in that also to be provided with the packed bed of being made up of phase-transition heat-storage medium and heating agent that is enclosed in around the heating cable 10 in pipeline 4.Packed bed can have two kinds of structures, one is the accumulation of heat tubular type, its structure can just axially be placed the heat accumulation pipe 11 that is filled with the phase-transition heat-storage medium at pipeline 4 referring to Fig. 3～Fig. 4, leaves the slit that charges into heating agent 12 between the heat accumulation pipe 11 and between heat accumulation pipe 11 and the pipeline 4.It is two for the accumulation of heat capsule-type, and its structure can just be placed the accumulation of heat capsule 13 that is filled with the phase-transition heat-storage medium referring to Fig. 5 in the cavity of pipeline 4, between the accumulation of heat capsule 13, leave the space that charges into heating agent 12 between accumulation of heat capsule 13 and the pipeline 4.

The mode that installs additional of these two kinds of phase-change materials can both reach good accumulation of heat effect.Want the wall thickness of heat accumulation pipe and accumulation of heat capsule to require to be not more than 0.5mm in addition,, increase the heat storage capacity of unit volume to increase the quality that fills of heat-storing material as far as possible.Heating agent will have good heat-conducting and certain sensible heat heat storage capacity, thereby the heating cable liberated heat is passed to the latent-heat storage material very soon.Simultaneously, the rising itself along with temperature also has certain accumulation of heat effect.Require phase change heat storage material to have higher latent heat density and suitable phase transition temperature.If the phase transition temperature of heat storage medium is low excessively, the electric heating floor is in temperature-rise period, and the too early latent-heat storage process that enters must influence the conduction of heat, increases the response time, can not reach the effect of instant-heating.If the phase transition temperature of heat storage medium is too high, can make the ground plate temperature maintain high value for a long time.Obviously can reduce the comfort level of floor heating, also be unfavorable for the adjusting of indoor temperature.Research and use experience prove that different according to building heat preservation degree and people's demand, surface temperature generally is controlled in 24～30 degrees centigrade of scopes.Temperature is crossed when hanging down and is not reached the heating requirement, the too high comfort level that influences of temperature, and cause unnecessary energy waste.Because consider the temperature gradient of concrete fill layer, the phase transition temperature of heat storage medium is advisable with 40～45 degrees centigrade.

Basic principle of the present utility model: heat storage medium is made the porous packed bed, and the bed body fills heating agent in the space.Heat storage medium is heated/undergoes phase transition when cooling off, and this is the latent-heat storage process.And heating agent strengthens the heat transfer of phase transformation heat storage medium inside on the one hand as the fluid media (medium) that conducts heat between heat-obtaining/heating surface and the heat storage medium; Again along with holding/the carrying out of exothermic process, occurrence temperature changes on the other hand, and this is the sensible heat heat-accumulating process.Use this technology, can strengthen the diabatic process of heat storage medium inside greatly, improve volume accumulation of heat intensity.

The utility model redesigns the structure of heating pipeline section in the existing floor heating technology, makes the electric heating floor have heat storage performance, has improved the heat storage capacity of unit volume, has reduced the volume of thermal storage equipment.

Description of drawings

Fig. 1: the pipe layout method figure of existing floor heating technology;

Fig. 2: single-screw type piping arrangement;

Fig. 3: the accumulation of heat tubular type pipeline section schematic diagram of the utility model technology;

Fig. 4: the A-A view among Fig. 3;

Fig. 5: the accumulation of heat capsule-type pipeline section schematic diagram of the utility model technology;

Label is among Fig. 1～Fig. 5: 1. corner insulation material, 2. bail, 3. dilatation joint, 4. pipeline, 5. ground floor, 6. screed-coat, 7. concrete layer, 8. composite heat-insulating layer, 9. structure sheaf, 10. heating cable, 11. heat accumulation pipes, 12. heating agents, 13. accumulation of heat capsules.

Embodiment

At first, make the heat accumulation pipe and the accumulation of heat capsule that fill the phase-transition heat-storage medium, will note when filling heat storage medium reserving certain spatial margin, volumetric expansion produces the pipe that rises when avoiding the fusing of phase-transition heat-storage medium.Will carry out the strictness sealing to it after filling, in order to avoid the long-time back phase-change material that uses oozes out, this can reduce the accumulation of heat effect greatly.The phase-transition heat-storage medium can be selected the organic or inorganic phase-change material of phase transition temperature between 40～45 degrees centigrade for use.Then, heating cable is installed at overclad tubes material center.Next step fills up remaining space in the tubing with making good heat accumulation pipe or accumulation of heat capsule.Its concrete structure can be referring to Fig. 3～Fig. 5.At last, heating agent (generally selecting water for use as heating agent) will be filled with in the slit.Like this, the making of pipeline structure is finished substantially.The laying of pipeline can be laid according to method of the prior art, the visible Fig. 1 of concrete measure.The layout of pipeline can adopt the arrangement mode of single-screw type, as shown in Figure 2.Lay the room on this electric heating floor, can realize the accumulation of heat in evening, daytime heat-obtaining heating system.The residence comfort in room also will improve greatly.

Claims

1, a kind of sensible heat-latent-heat storage heating tube device that is used for under-floor electric heating, comprise pipeline (4) and be arranged on the heating cable (10) at pipeline center, it is characterized in that: in pipeline (4), also be provided be enclosed in heating cable (10) thus on every side form packed bed by phase-transition heat-storage medium and heating agent with composite heat storage function.

2, a kind of sensible heat-latent-heat storage heating tube device that is used for under-floor electric heating according to claim 1, it is characterized in that: the structure of packed bed is the accumulation of heat tubular type, just in pipeline (4), axially place the heat accumulation pipe (11) that is filled with the phase-transition heat-storage medium, leave the slit that charges into heating agent (12) between the heat accumulation pipe (11) and between heat accumulation pipe (11) and the pipeline (4).

3, a kind of sensible heat-latent-heat storage heating tube device that is used for under-floor electric heating according to claim 1, it is characterized in that: the structure of packed bed is the accumulation of heat capsule-type, just in the cavity of pipeline (4), place the accumulation of heat capsule (13) be filled with the phase-transition heat-storage medium, between the accumulation of heat capsule (13), leave the space that charges into heating agent (12) between accumulation of heat capsule (13) and the pipeline (4).

4, according to claim 2 or 3 described a kind of sensible heat-latent-heat storage heating tube devices that are used for under-floor electric heating, it is characterized in that: the pipe thickness of heat accumulation pipe (11) and accumulation of heat capsule (13) is all less than 0.5mm.