CN116123588A - Dry-type phase-change heat-storage type floor radiant heating terminal - Google Patents

Abstract

The invention discloses a dry phase-change heat accumulating type floor radiant heating terminal, which sequentially comprises an insulation layer, an aluminum plate heat conduction layer, a heating coil, a shaping phase-change material layer and a floor layer from bottom to top, and is mainly used for heating village and town buildings in winter. The heat-insulating layer adopts a dry type floor heating module with prefabricated grooves, and the heating coil is embedded in the dry type floor heating module and transfers heat to the aluminum plate heat-conducting layer and the phase change material layer through heat conduction. The phase change material layer is in modularized shaping encapsulation by high-density polyethylene, and the modules are supported by keels so as to meet the leakage-proof and pressure-bearing requirements of the phase change material. The invention can effectively reduce the starting time of a floor radiation heating system, improve the utilization rate of renewable energy sources such as solar energy and the like, reduce the peak-valley gap of power load and achieve the purposes of saving energy, reducing emission and saving operation cost by the heat accumulation of the phase change material in the tail end.

Description

Dry-type phase-change heat-storage type floor radiant heating terminal

Technical field:

the invention belongs to the technical field of heating ventilation and air conditioning, and particularly relates to a dry-type phase-change heat storage type floor radiant heating terminal.

Background

The heating modes commonly used at present are two modes of radiator hot water heating and radiation heating. The radiator heats by hot water, takes the radiator as heating equipment and takes hot water as heating medium; the radiation heating is a heating mode which depends on radiation heat exchange between radiation heating equipment with higher temperature and the inner surface of the enclosure structure and convection heat exchange between radiation heating equipment and indoor air to ensure that the average temperature of the inner surface of the enclosure structure of the room is higher than that of the indoor air. Compared with the radiator for heating, the floor radiation heating can utilize low-temperature hot water, has the advantages of energy conservation, high thermal comfort and no occupation of indoor space, and is widely applied to the existing heating engineering.

The heat storage technology can alleviate the mismatch of the two sides of energy supply and demand in time, space and intensity, and the phase change heat storage technology is to absorb or release a large amount of latent heat in the process of changing the physical state by utilizing the phase change material so as to realize the storage and release of energy, and compared with sensible heat storage, the energy storage density is greatly improved. The problem of unstable energy output when solar energy is used as a heat source can be solved through phase change energy storage, and meanwhile, the heat storage technology is an effective mode for relieving peak-valley differences of the power grid.

The phase-change heat storage technology is combined with the floor radiant heating technology, and the phase-change heat storage type floor radiant heating terminal has wide application prospect. The phase-change temperature control characteristic of the phase-change material can also prolong the constant temperature time of heating. Reasonable use of the phase change material can maintain the stability of indoor temperature for a long time under the condition of intermittent heating.

The Chinese patent with the patent number of 201810675855 discloses a phase-change heat storage floor structure, which sequentially comprises a heat preservation layer, a concrete layer, a heat storage layer, a leveling layer and a finish layer from bottom to top. The floor adopts the phase change material to store heat, so that the starting time of a floor radiation heating system can be effectively reduced, the electricity consumption is saved, and the purposes of saving energy and shifting peak and filling valley by electric power are achieved. But the floor structure is filled with 30mm of bean stone concrete, the whole floor is high, and a large amount of indoor space is occupied.

The Chinese patent with the patent number of 201520801759 discloses a phase-change heat accumulating type solar low-temperature hot water radiation heating floor, which is sequentially provided with a floor base layer, a heat insulating layer, an aluminum foil protective layer, a cast-in-situ filling layer, a dry and hard cement mortar leveling layer and a ground decorative layer from bottom to top. The method has the beneficial effects that the traditional concrete is replaced by the pea stone concrete doped with the phase-change microcapsule, so that the building material has certain phase-change heat storage. The floor combines the concrete filling layer and the heat accumulating layer into a whole, reduces the height of the floor to a certain extent, but the phase change microcapsule is doped in the concrete, the phase change material is less, and the heat accumulating capacity of the floor is not great.

Disclosure of Invention

Based on the background and the problems, a dry phase-change heat accumulating type floor radiant heating terminal is provided.

The floor radiant heating terminal mainly comprises a floor structure layer, a heat preservation layer, an aluminum plate heat conduction layer, a heating coil, a shaping phase change material layer and a floor layer.

The floor structure layer refers to a base layer of a floor or a floor slab, and the rest parts are paved above the base layer.

The heat-insulating layer adopts a dry floor heating module, an aluminum plate heat-conducting layer is attached to the module, prefabricated grooves are formed in the module, and the coils are embedded into the module according to corresponding grooves based on design calculation of the radiation coils.

The shaping phase-change material layer consists of three parts, namely a phase-change material packaging box, a phase-change material and a supporting keel.

The phase change material packaging box is made of high-density polyethylene, and the filling volume of the phase change material in the box is 85% so as to adapt to the volume change of the material when the material is solidified and melted, and effectively prevent the leakage of the phase change material.

The phase change material adopts inorganic material, and the main component is CaCl ₂ ·6H ₂ O is prepared by combining a plurality of inorganic hydrated salts to meet the phase transition temperature, phase transition latent heat and heat conductivity coefficient required by the material and to inhibit supercooling and phase separation phenomena.

The supporting keels are used for meeting the pressure-bearing requirements of the phase-change material and the packaging box, so that the phase-change material and the packaging box cannot deform due to the pressure on the upper part of the floor, and the thermal performance of the tail end is affected. The keels can be selected from wood keels or light steel keels according to specific conditions.

The floor layer refers to a floor decoration layer, and wood floors or floor tiles and the like can be selected.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic structural diagram of a phase change material layer according to the present invention.

In fig. 1, (a) a structural layer; (b) an insulating layer; (c) shaping the phase change material layer; (d) a ground layer; (e) an aluminum plate heat conducting layer; (f) heating coil.

In fig. 2, (g) a phase change material package; (h) an inorganic phase change material; (i) supporting the keel.

Detailed Description

The following describes the radiation end of the dry-type phase-change heat storage floor in the invention in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1, the floor structure layer (a) refers to a base layer of a floor or slab, which is already present before the end laying, and a detailed description of the practice thereof is not necessary here.

As shown in FIG. 1, the heat-insulating layer (b) adopts a dry floor heating module, and the length, width and height of the module are 1200mm multiplied by 600mm multiplied by 30mm. The grooves are circular and have a diameter of 20mm. The groove spacing is prefabricated according to the geothermal coil design calculation spacing.

As shown in FIG. 1, the shaped phase change material layer is composed of three parts, namely a phase change material packaging box, a phase change material and a supporting keel. The specific structure is shown in fig. 2.

As shown in FIG. 2, the phase change material packaging box is made of high-density polyethylene, the length and width of the packaging box are 328mm multiplied by 225mm multiplied by 10mm, and the thickness of the packaging box is 1mm.

As shown in fig. 2, the phase change material is an inorganic material, and after being compounded by a plurality of inorganic phase change materials according to a certain proportion, the physical parameters are respectively as follows: the phase transition temperature is 29 ℃; latent heat of phase change 185kJ/kg; thermal conductivity of 0.75W/m ² K; density 1750kg/m ³ The method comprises the steps of carrying out a first treatment on the surface of the Constant pressure heat capacity, 1400J/kg.K.

As shown in fig. 2, the support runners are positioned between the phase change material enclosures.

As shown in FIG. 1, the heating coil is a PE-RT tube with a tube diameter of 20mm.

As shown in FIG. 1, when the floor layer is a wood floor, the thickness is 12mm.

Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the radiating end of the present floor, and are not limiting. The specification of the tail end structure can be flexibly designed according to different regional conditions or actual building loads in actual use. The technical scheme of the dry-type phase-change heat accumulating type floor radiation end making method is modified or replaced equivalently, and the spirit and the scope of the technical scheme are not deviated.

Claims (2)

1. The dry phase-change heat-accumulating type floor radiant heating terminal is characterized by comprising a floor structure layer, a heat-insulating layer, an aluminum plate heat-conducting layer, a heating coil, a shaping phase-change material layer and a floor layer.

The heat-insulating layer adopts a dry floor heating module, and an aluminum plate heat-conducting layer is attached on the module.

The heating coil adopts a PE-RT pipe with the pipe diameter of 20mm.

The shaping phase-change material layer consists of three parts, namely a phase-change material packaging box, a phase-change material and a supporting keel.

2. The dry phase-change thermal storage type floor radiant heating terminal according to claim 1, wherein the encapsulation box in the shaped phase-change material layer is made of high-density polyethylene material, and the phase-change material is made of inorganic hydrated salt composite material.

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