CN214581388U

CN214581388U - Controllable phase-change heat storage and release device for storing photovoltaic and peak-valley electric energy

Info

Publication number: CN214581388U
Application number: CN202120818506.9U
Authority: CN
Inventors: 史为民; 吴啟贤
Original assignee: Shihezi University
Current assignee: Shihezi University
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-11-02
Anticipated expiration: 2031-04-21

Abstract

The utility model provides a store controllable formula phase transition heat release device of photovoltaic and peak valley electric energy, including the electric heating wire, the temperature control appearance, pack phase transition filler heat accumulation material and have the heat accumulation box of thermal-insulated heat preservation casing, the heat transfer coil pipe, finned cooling tube and small-size tubing pump, the electric heating wire is resistance type electric heating element, place thin wall stainless steel coil heat exchanger in the heat accumulation box, heat accumulation box sets up stainless steel fin pipe radiator outward, heat exchanger and cooling tube are with PPR pipe connection, regard water as heat transfer medium, install small-size tubing pump on the pipeline of coil heat exchanger water inlet and radiator delivery port department, carry out forced circulation heat transfer. The utility model discloses a plurality of module combinations can be carried out to the replenishment that adapts to different occasions needs of heating, can combine heat preservation structure and heat exchanger technique, can realize the reuse of photovoltaic electric energy ability and peak valley electric energy in different time and space.

Description

Controllable phase-change heat storage and release device for storing photovoltaic and peak-valley electric energy

Technical Field

The utility model relates to a hold heat release device, concretely relates to controllable formula phase transition of storing photovoltaic and peak valley electric energy holds heat release device.

Background

China is a large energy consumption country, and with the requirement of green development, the efficient utilization of clean energy such as solar energy in production and life has become a necessary trend. In addition, along with the popularization and implementation of domestic peak-valley electricity price, the technology for effectively storing abundant electric energy in the power grid during the power utilization valley has great practical value. In response to the need, it is desirable to design a heat storage and release device for storing and utilizing photovoltaic and peak-valley electric energy to improve resource utilization.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that not enough to above-mentioned prior art provides a controllable formula phase transition of storing photovoltaic and peak valley electric energy holds heat abstractor, and the device design scientific and reasonable, the practicality is strong, easy operation, and the cost is controllable, can effectively improve resource utilization, reduces cost of life, can use widely.

In order to solve the technical problem, the utility model discloses a technical scheme is: the controllable phase change heat storage and release device is characterized by comprising a heat storage box body, an electric heating wire, a temperature control instrument, a heat exchange coil, a finned radiating tube and a small pipeline pump, wherein the heat storage box body is filled with a phase change filler, the electric heating wire and the heat exchange coil are immersed in the phase change filler in the heat storage box body, the heat exchange coil is communicated with the finned radiating tube end to end through a circulating pipeline to form a loop, the finned radiating tube is arranged outside the heat storage box body, the small pipeline pump is arranged on the circulating pipeline for communicating the heat exchange coil with the finned radiating tube, water filled in the heat exchange coil and the finned radiating tube is used as a heat exchange medium, the temperature control instrument is connected with a temperature measuring probe, and the temperature measuring probe is immersed in the phase change filler.

Preferably, the heat storage box body is a sealed cylindrical container, the inner diameter of the heat storage box body is 0.6m, the height of the heat storage box body is 1.2m, and the cylinder wall and the top bottom surface of the heat storage box body are sequentially composed of 0.2mm aluminum foil, 2cm wood boards and 10cm heat insulation layers from inside to outside.

Preferably, electric heating wire coiled into cylinder helix is threadlike, radius after electric heating wire coiled is 135mm, the pitch is 15mm, the number of turns is 72 circles, total power is 900W, heat exchange coil is DN 16X 0.8's thin wall stainless steel pipe, heat exchange coil coiled into cylinder helix is threadlike and the cover is established electric heating wire periphery side, and heat exchange coil's after coiling radius is 165mm, the pitch is 30mm, the number of turns is 30 circles.

Preferably, the finned radiating tube is steel-aluminum composite finned radiating tube, the inner tube diameter of finned radiating tube is 25mm, fin diameter is 160mm, set up U type linkage segment on the finned radiating tube, set up two rows of fins in U type linkage segment both sides, the length of single row fin is 1000mm, two rows of fin centre-to-centre spacings are 400 mm.

Preferably, the phase-change filler is polyethylene glycol with the molecular weight of 10000 and the density of 1.42g/cm³The phase change enthalpy is 191J/g, the phase change starting temperature is 50.3 ℃, the phase change ending temperature is 69.9 ℃, the phase change peak temperature is 99.5 ℃, and the upper limit temperature in the device is 70 ℃. 400kg of phase change filler can be contained in the heat storage box body, and theoretically, 7.64 multiplied by 104kJ can be stored.

Preferably, the temperature controller is a socket switch type electronic temperature controller for controlling temperature, the input voltage is 180-. The output plug is 5 holes in national standard. And (4) preparing corrosion-resistant plastic to package the temperature probes. The temperature controller controls the initial heating temperature of the phase-change filler to be 50 ℃ and the final heating temperature to be 70 ℃.

Preferably, the small-sized pipeline pump has a head of 12m and a flow rate of 8L/min.

Preferably, the circulating pipe connecting the heat exchange coil pipe and the finned heat dissipation pipe is a PPR pipe.

Preferably, the CFD calculation is used for simulating and determining the arrangement position and the arrangement mode of the heat exchange coil in the heat storage box body.

Preferably, the device can be used singly or in combination of a plurality of devices to meet the requirement of supplementary temperature rise in different application occasions.

Preferably, the power source of the electric heating wire comprises a photovoltaic power generation device and an existing power grid, and the power source is switched under different time periods and environments, so that the photovoltaic energy and the peak-valley electric energy are efficiently utilized. The temperature controller is also connected between the electric heating wire and the power supply, and the opening and closing of the electric heating wire are controlled through the temperature range set by the temperature controller.

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

1. the utility model discloses the structural design science closes, and the practicality is strong, can make full use of outdoor solar radiation energy and peak valley electric energy, uses the phase transition heat-retaining technique to turn into heat energy with the electric energy, stores heat energy with the mode of phase transition latent heat again. Meanwhile, the heat preservation structure and the heat exchanger technology are combined, and the photovoltaic electric energy and the peak-valley electric energy can be recycled at different time and space.

2. The utility model discloses utilize photovoltaic and peak valley electric energy to make electric heating element produce the heat and melt the phase transition filler, utilize the phase transition heat-retaining technique to store heat energy with the mode of phase transition latent heat. Meanwhile, the heat exchanger technology can release phase change potential for heating of buildings. The device has a heat-insulating shell made of heat-insulating material, and can strictly prevent the internal heat from dissipating, so that the heat can be stored for a long time. The device can make full use of outdoor solar radiation energy and peak-valley electric energy, can be used as a building auxiliary heating means in northwest rural areas where solar energy is abundant and houses need heating in winter, can reduce heating energy consumption, reduces carbon dioxide emission, and realizes low-carbon development.

3. The utility model discloses a phase transition filler with heat-retaining performance comes storage heat energy to heat the water in the electrical heating line, still guarantees through accuse temperature appearance control heating temperature that the temperature of circulating water is in suitable scope, scientific and reasonable, and the result of application is good.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic top view of the heat storage box of the present invention.

Fig. 3 is an enlarged schematic view of the partial structure of the heat exchange coil and the electric heating wire of the present invention.

Description of reference numerals:

1-a heat storage box body; 2-heat exchange coil pipe; 3-an electrical heating wire;

4-finned radiating pipes; 5-U-shaped connecting section; 6, a fin;

7-small pipeline pump; 8-a circulation pipeline; 9-temperature control instrument;

10-temperature measuring probe; 11-heat insulation layer; 12-a wood board layer;

13-aluminium foil layer; 14-phase change filler.

Detailed Description

As shown in fig. 1 to 3, the utility model discloses a heat storage box 1, electric heater wire 3, temperature control appearance 9, heat transfer coil pipe 2, finned radiating tube 4 and miniature pipeline pump 7, fill phase transition filler 14 in the heat storage box 1, electric heater wire 3 and the phase transition filler 14 of heat transfer coil pipe 2 submergence in heat storage box 1, heat transfer coil pipe 2 forms the return circuit through circulating line 8 and 4 end to end intercommunication of finned radiating tube, finned radiating tube 4 sets up outside heat storage box 1, the intercommunication set up miniature pipeline pump 7 on the circulating line 8 of heat transfer coil pipe 2 and finned radiating tube 4, fill water as heat transfer medium in heat transfer coil pipe 2 and finned radiating tube 4, be connected with temperature probe 10 on the temperature control appearance 9, temperature probe 10 submergence is in phase transition filler 14.

In this embodiment, the thermal storage box 1 is a sealed cylindrical container, the thermal storage box 1 has an inner diameter of 0.6m and a height of 1.2m, so the volume is 339L, the cylinder wall and the top bottom surface of the thermal storage box 1 are sequentially composed of an aluminum foil layer 13 with a thickness of 0.2mm, a wood board layer 12 with a thickness of 2cm and a thermal insulation layer 11 with a thickness of 10cm from inside to outside, and the thermal insulation layer 11 is made of a high-density polystyrene foam material.

In this embodiment, electric heating wire 3 coils into cylindrical helix shape, radius after electric heating wire 3 coils is 135mm, the pitch is 15mm, the number of turns is 72 circles, total power is 900W, heat exchange coil 2 is DN 16X 0.8's thin wall stainless steel pipe, heat exchange coil 2 coils into cylindrical helix shape and overlaps and establish 3 periphery sides of electric heating wire, and the radius of heat exchange coil 2 after coiling is 165mm, the pitch is 30mm, the number of turns is 30 circles.

In this embodiment, finned heat dissipation tube 4 is the compound finned heat dissipation tube of steel aluminium, set up U type linkage segment 5 on finned heat dissipation tube 4, set up two rows of ring form fins 6 in 5 both sides of U type linkage segment, finned heat dissipation tube 4's inner tube diameter is 25mm, fin 6 diameter is 160mm, and the length of single row fin 6 is 1000mm, two rows of fin 6 centre-to-centre spacings are 400 mm.

In this embodiment, the phase-change filler 14 is polyethylene glycol with a molecular weight of 10000 and a density of 1.42g/cm³The enthalpy of phase change was 191J/g, the phase change initiation temperature was 50.3 ℃, the phase change termination temperature was 69.9 ℃, the peak temperature of phase change was 99.5 ℃, and the upper limit temperature in this example was 70 ℃. 400kg of phase change filler 14 can be contained in the heat storage box body 1, and theoretically, 7.64 multiplied by 104kJ can be stored.

In this embodiment, the temperature controller 1 is a socket switch type electronic temperature controller for controlling temperature, the input voltage is 180-. The output plug is 5 holes in national standard. Corrosion resistant plastic is provided to encapsulate the temperature probes 10 one. The temperature controller 9 controls the initial heating temperature of the phase-change filler 14 to be 50 ℃ and the final heating temperature to be 70 ℃.

In this embodiment, the small pipe pump 7 has a head of 12m and a flow rate of 8L/min.

In this embodiment, the circulating pipe connecting the heat exchange coil 2 and the finned heat dissipation pipe 4 is a PPR pipe.

In this embodiment, the arrangement position and the arrangement mode of the heat exchange coil 2 in the heat storage box are determined by CFD calculation simulation.

In this embodiment, the device can be used singly or in combination to meet the temperature rise supplement requirements of different application occasions.

In this embodiment, the electric heating wire 3 is a resistive electric heating wire, the power source of the electric heating wire 3 includes a photovoltaic power generation device and an existing power grid, and the power source is switched in different time periods and environments, so that efficient utilization of photovoltaic energy and peak-valley electric energy is realized. The temperature controller 9 is connected between the electric heating wire 3 and the power supply, and the opening and closing of the electric heating wire 3 are controlled through the temperature range set by the temperature controller 9.

When the solar heat collector is used, when outdoor illumination conditions are good, the photovoltaic power generation device is used as a power supply, the temperature controller 9 controls the electric heating wire 3 to heat the phase change filler 14, the heating range of the phase change filler 14 is 50-70 ℃, water in the heat exchange coil 2 is heated to 40-50 ℃ by the heat radiation of the phase change filler 14, hot water flows into the finned radiating pipe 4 under the action of the small-sized pipeline pump 7, and the heat is dissipated under the action of the fins 6 of the finned radiating pipe 4, so that heating of a building is realized; when the electricity price is lower when the electricity consumption is in the valley of the power grid, the electricity price can be switched to the existing power grid for supplying power to enable the electric heating wire 3 to work. The two modes are matched for use, so that the purposes of efficiently utilizing electric energy resources and saving heating cost are achieved.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modifications, changes and equivalent changes made to the above embodiments according to the technical spirit of the present invention all fall within the protection scope of the technical solution of the present invention.

Claims

1. A controllable phase change heat storage and release device for storing photovoltaic and peak-valley electric energy is characterized by comprising a heat storage box body (1), an electric heating wire (3), a temperature control instrument (9), a heat exchange coil (2), a finned radiating tube (4) and a small pipeline pump (7), wherein a phase change filler (14) is filled in the heat storage box body (1), the electric heating wire (3) and the heat exchange coil (2) are immersed in the phase change filler (14) in the heat storage box body (1), the heat exchange coil (2) is communicated with the finned radiating tube (4) end to end through a circulating pipeline (8) to form a loop, the finned radiating tube (4) is arranged outside the heat storage box body (1), the small pipeline pump (7) is arranged on the circulating pipeline (8) communicating the heat exchange coil (2) and the radiating tube (4), and water filled in the heat exchange coil (2) and the finned radiating tube (4) is used as a heat exchange medium, the temperature control instrument (9) is connected with a temperature measuring probe (10), and the temperature measuring probe (10) is immersed in the phase change filler (14).

2. The controllable phase-change heat storage and release device for storing photovoltaic and peak-valley electric energy as claimed in claim 1, wherein the heat storage box body (1) is a sealed cylindrical container, and the wall and the top and bottom surfaces of the heat storage box body (1) are sequentially composed of an aluminum foil layer (13), a wood board layer (12) and a heat insulation layer (11) from inside to outside.

3. The controllable phase-change heat storage and release device for storing photovoltaic and peak-valley electric energy as claimed in claim 1, wherein the electric heating wire (3) is coiled into a cylindrical spiral shape, the radius of the coiled electric heating wire (3) is 135mm, the pitch of the coiled electric heating wire is 15mm, the number of turns of the coiled electric heating wire is 72, the total power of the coiled electric heating wire is 900W, the heat exchange coil (2) is a thin-wall stainless steel round tube with the volume of DN16 x 0.8, the heat exchange coil (2) is coiled into a cylindrical spiral shape and sleeved on the outer peripheral side of the electric heating wire (3), and the radius of the coiled heat exchange coil (2) is 165mm, the pitch of the coiled electric heating wire is 30mm, and the number of turns of the coiled electric heating wire is 30.

4. The controllable phase-change heat storage and release device for storing photovoltaic and peak-valley electric energy as claimed in claim 1, wherein the finned heat dissipation tube (4) is a steel-aluminum composite finned heat dissipation tube, a U-shaped connection section (5) is arranged on the finned heat dissipation tube (4), two rows of fins (6) are arranged on two sides of the U-shaped connection section (5), the diameter of an inner tube of the finned heat dissipation tube (4) is 25mm, the diameter of the fins (6) is 160mm, the total length of a single row of fins (6) is 1000mm, and the center distance between the two rows of fins (6) is 400 mm.