CN212691921U

CN212691921U - Interlayer ventilation type phase change heat storage structure

Info

Publication number: CN212691921U
Application number: CN202020761780.2U
Authority: CN
Inventors: 吕石磊; 孙一猛; 赵靖
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2021-03-12
Anticipated expiration: 2030-05-08

Abstract

The utility model discloses an interlayer ventilation type phase change heat storage structure, which consists of a plurality of unit structures, wherein each unit structure comprises a galvanized thin steel plate (6) with a phase change heat storage layer (3), a heat preservation layer (5) with a reflecting film (4) and an air channel (1); the reflecting film (4) is laid on the heat-insulating layer (5), the phase-change heat storage layer (3) is laid on the galvanized thin steel plate (6), and the galvanized thin steel plate (6) with the phase-change heat storage layer (3) is fixed on the keel (2). The utility model can improve the heat storage capacity of the whole structure, reduce the weight and volume of the structure and reduce the occupancy rate of the indoor space; the air channel can be simultaneously utilized in winter and summer, so that the waste of resources caused by the fact that the phase change heat storage structure only serves a single season is avoided.

Description

Interlayer ventilation type phase change heat storage structure

Technical Field

The utility model relates to a heating refrigeration technical field in building energy conservation and renewable energy field especially relates to a ventilation formula phase change heat accumulation structure.

Background

At present, air pollution is serious in winter, scattered coal is used for heating villages and towns, the important reason for air pollution in winter is that how to popularize clean heating is achieved, the energy using mode of farmers is changed, and heating by using clean energy is the key point. Solar energy is used as a clean energy source, and has abundant resources in most areas in the north of China, and the annual irradiation dose is more than 4200 MJ/square meter. The problem of unmatched supply and demand in time existing in solar heating needs to be solved by combining a heat storage technology.

The phase-change material is a substance which stores or releases a large amount of heat energy through self phase change, the temperature of the material is almost kept unchanged before the phase change is completed during the phase change, a wide temperature platform is formed, and the phase-change material has the advantage of large heat storage capacity. The phase-change material can be combined with the building envelope to form a building comprehensive heat storage system. The system has the characteristic of being coupled with an indoor hot area, the phase-change material has large contact area with the indoor, the heat exchange effect is good, and the effect of stabilizing the room temperature can be achieved.

Chinese patent 201811068101.7 discloses a shaped phase change and embedded pipe type ventilated roof, and provides the thickness of the phase change layer, the phase change temperature range and the ventilation strategy which are suitable for different areas; this roofing is including the roof covering that has phase change material layer and embedded tubular air pipe simultaneously to and air intake and air outlet, wherein, the air intake is provided with electronic blast gate and fan, and the fan is used for carrying outdoor air to air pipe, and electronic blast gate is used for switching outdoor air and embedded tubular air pipe intercommunication and the state of non-intercommunication. The utility model discloses an in used setting phase change material, its heat accumulation is less, causes the volume of structure itself and the increase of weight, occupies more building space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intermediate layer ventilation formula phase change heat storage structure utilizes air passage to improve phase change material heat-retaining or exothermic speed, increases envelope's thermal insulation performance, for the building realizes solar energy heating in winter and provides the solution thinking, the building can realize the radiation cooling in summer simultaneously.

The utility model discloses a sandwich ventilation type phase change heat storage structure, which consists of a plurality of unit structures, wherein each unit structure comprises a galvanized thin steel plate 6 with a phase change heat storage layer 3, a heat preservation layer 5 with a reflection film 4 and an air channel 1; wherein: the reflecting film 4 is laid on the heat preservation layer 5, the phase change heat storage layer 3 is laid on the galvanized thin steel plate 6, and the galvanized thin steel plate 6 with the phase change heat storage layer 3 is fixed on the keel 2.

The air channel 1 is a ventilation channel connected in parallel.

The phase-change heat storage layer 3 is formed by tightly sticking a thin bag packaged with a phase-change material on the galvanized thin steel sheet 6 by glue.

The phase-change temperature range of the phase-change material adopted by the phase-change heat storage layer 3 is 18-20 ℃.

The thickness of the galvanized thin steel sheet 6 is 0.8 mm-1 mm.

The width of the keel 2 is 60 mm-80 mm.

The width of the air channel 1 is not wider than 250 mm.

Compared with the prior art, the utility model has the following advantage:

1. the heat storage capacity of the whole structure is improved, the weight and the volume of the structure are reduced, and the occupancy rate of indoor space is reduced;

2. the air channel can improve the heat preservation performance of the building envelope structure, the phase change temperature of the phase change material is low, the phase change material can be used in winter and summer, and the problem that the phase change heat storage structure only serves a single season to cause resource waste is avoided.

Drawings

Fig. 1 is a schematic cross-sectional view of a unit structure of a sandwich ventilation type phase change heat storage structure according to the present invention;

fig. 2 is a schematic view of a unit structure air duct of a sandwich ventilation type phase change heat storage structure of the present invention;

fig. 3 is a schematic view of an embodiment of a sandwich ventilation type phase change thermal storage structure according to the present invention.

Reference numerals:

1. the air channel, 2, fossil fragments, 3, phase transition heat accumulation layer, 4, reflectance coating, 5, heat preservation, 6, galvanized sheet steel.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only, not limitation.

As shown in fig. 1, it is a schematic cross-sectional view of a unit structure of a sandwich ventilation type phase change heat storage structure of the present invention;

the utility model discloses a unit structure of intermediate layer ventilation formula phase change heat accumulation structure comprises galvanized sheet steel 6, phase change heat accumulation layer 3, fossil fragments 2, reflectance coating 4 and heat preservation 5. The reflective film 4 is laid on the heat preservation layer 5, and the reflective film is made of a material with high reflectivity, so that radiation heat dissipation of the phase change heat storage layer 3 to one side of the heat preservation layer 5 is reduced. The phase change heat storage layer 3 is arranged on the galvanized thin steel sheet 6, the galvanized thin steel sheet 6 with the phase change heat storage layer 3 is fixed on the keel 2, and the keel 2 is fixed outside the reflecting film 4. The heat insulating layer 5 with the reflecting film 4 and the galvanized thin steel plate 6 with the phase change heat storage layer 3 form an air channel 1. And sealing the gaps among the keel 2, the galvanized thin steel sheet 6 and the reflecting film 4 by using a sealant to prevent air leakage of the air channel 1 in the air supply process and wind pressure loss.

As shown in fig. 2, it is a schematic diagram of a unit structure air duct of the sandwich ventilation type phase change heat storage structure of the present invention. Is a ventilation mode of one unit construction. The unit configuration has two channels and a break point, air entering from one channel side and returning from the other.

Fig. 3 is a schematic view showing an embodiment of the sandwich ventilation type phase change heat storage structure according to the present invention. The interlayer ventilation type heat storage structure in the room is composed of a plurality of unit structures, and the unit structures are arranged in parallel to form an indoor air interlayer and an outdoor air interlayer, so that the heat resistance of the enclosure structure is increased. The paving mode can be simultaneously and uniformly paved to form a group of ventilation channels connected in parallel. The paving mode is as follows: firstly, phase change materials are packaged in a thin bag, the phase change temperature of the phase change materials is 18-20 ℃, the thickness of the thin bag used for packaging is 0.09-0.12 mm, and the thin bag is packaged into a long strip shape by a heat packaging machine. And then the thin bag packaged with the phase-change material is tightly stuck on the galvanized thin steel sheet 6 by glue to form the phase-change heat storage layer 3. The wall body and the roof are provided with a heat preservation layer 5, the keel 2 is fixed outside the heat preservation layer 5 paved with the reflecting film 4, and then the galvanized thin steel plate 6 with the phase change heat storage layer 3 is fixed on the keel 2.

The working process of the utility model is as follows:

heating in winter: the solar air heat collector has the advantages of high heat collection efficiency and low manufacturing cost, and can collect hot air by the solar air heat collector, respectively send the hot air to one side of each unit structure air channel in daytime and then send the hot air back to the solar air heat collector from the other side. The phase-change material is heated by hot air to melt and store heat, and meanwhile, the indoor temperature is maintained. At night, the phase-change material is solidified to release heat, and the indoor temperature is continuously maintained, so that the utilization of solar energy is realized.

Cooling in summer: in daytime, when the indoor temperature is higher than the phase transition temperature of the phase transition material, the phase transition material is melted by the heat transfer of the galvanized sheet steel 6, and the function of stabilizing the room temperature is achieved. At night, natural wind with low outdoor temperature is sent into the air channel 1, the phase-change material is solidified and released heat when meeting condensation, and heat accumulated in the phase-change material in the daytime is replaced out of the room, so that the aim of cooling in summer is fulfilled.

The utility model adopts a macroscopic packaging mode to increase the packaging amount of the phase change heat storage material, improve the heat storage amount of the whole structure, simultaneously reduce the weight and the volume of the structure and reduce the occupancy rate of the indoor space; the phase-change material is packaged in the thin bag and is adhered to the galvanized thin steel sheet, so that heat transfer resistance with the indoor space can be reduced, and the heat exchange rate between the phase-change material and the indoor space is enhanced; the phase change temperature of the selected phase change material is low, so that the condition of overheating indoors in summer is avoided. Meanwhile, cold air or natural air is introduced into the air channel in summer, so that the purpose of indoor cooling can be achieved, and the problem that resources are wasted because the phase change heat storage structure only serves a single season is avoided.

Claims

1. A sandwich ventilation type phase change heat storage structure is characterized by comprising a plurality of unit structures, wherein each unit structure comprises a galvanized thin steel plate (6) with a phase change heat storage layer (3), a heat insulation layer (5) with a reflection film (4) and an air channel (1); wherein: the reflecting film (4) is laid on the heat insulation layer (5), the phase change heat storage layer (3) is laid on the galvanized thin steel plate (6), and the galvanized thin steel plate (6) with the phase change heat storage layer (3) is fixed on the keel (2).

2. The sandwich ventilated phase-change thermal storage structure according to claim 1, wherein the air channels (1) are ventilation channels connected in parallel.

3. The sandwich ventilated phase-change heat storage structure according to claim 1, wherein the phase-change heat storage layer (3) is tightly adhered to the galvanized sheet steel (6) by a thin bag encapsulating the phase-change material with glue.

4. The sandwich ventilated phase-change heat storage structure according to claim 1, wherein the phase-change material used in the phase-change heat storage layer (3) has a phase-change temperature ranging from 18 ℃ to 20 ℃.

5. The sandwich ventilated phase-change heat storage structure according to claim 1, wherein the galvanized steel sheet (6) has a thickness of 0.8mm to 1 mm.

6. The sandwich ventilated phase-change thermal storage structure according to claim 1, wherein the width of the keel (2) is 60mm to 80 mm.

7. The sandwich ventilated phase-change thermal storage structure according to claim 1, wherein the width of the air channel (1) is not wider than 250 mm.