CN112902722A

CN112902722A - Phase-change capacitance storage converter

Info

Publication number: CN112902722A
Application number: CN201911256177.7A
Authority: CN
Inventors: 王存义
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2021-06-04

Abstract

The invention relates to a phase change high-capacity accumulator, belonging to the field of solar heat utilization or energy storage power stations. The heat storage and exchange integrated device is characterized in that a phase-change heat storage working medium is filled in a heat insulation cavity, a heat exchanger filled with a work working medium is embedded in the phase-change heat storage working medium, heat conductors filled with a heat conduction working medium and made of capillary tube groups or coil pipes are distributed in the phase-change working medium, and when the heat conduction working medium is heated by solar energy or surplus electricity to transfer heat to the phase-change working medium to melt the phase-change working medium, the heat is stored in the phase-change working medium in a latent heat mode for use by the work working medium in the absence of the sun or the electricity. Has the advantages of large heat storage capacity, small volume, less material consumption, low cost and the like.

Description

Phase-change capacitance storage converter

Background

The solar energy photo-thermal utilization has many advantages, but one of the biggest defects is its intermittence and uncertainty, therefore, no matter solar thermal power generation is called photo-thermal power generation for short, or solar energy is used for heating or industrial steam supply, heat storage is needed, the existing heat storage mode is generally sensible heat storage, most of high-temperature heat storage is stored by fused salt or heat conducting oil, and also is stored by solid such as concrete, the sensible heat storage mode uses a lot of materials, has large volume and high cost, and the fused salt has strong corrosivity, the fused salt and the heat conducting oil are easy to age, and are easy to replace within a certain time, and are easy to decompose and denature when the temperature is too high.

Disclosure of Invention

The invention aims to solve the problems, and provides a phase-change high-capacity storage converter which is large in heat storage capacity, small in size, low in cost, high in heat release temperature and capable of storing heat by latent heat and sensible heat.

The invention is realized by the following scheme

1. The utility model provides a phase transition holds and stores up changer, stores up the changer for short, it includes storage and trades chamber, phase transition working medium, heat conductor and heat exchanger, perhaps still includes the heat generator, and its special character lies in:

A. the heat storage and exchange device is a short-term device for heat storage and exchange, in the heat storage and exchange cavity, near the cavity wall, phase-change working media are all distributed with heat conductors or heat generators, the heat exchanger is arranged near the middle part of the phase-change working media, working media are arranged in the heat exchanger, the working media are media capable of pushing a machine which converts heat energy into mechanical energy to work, and the working media are short-term working media;

a. the storage converter is a high-temperature storage converter or a medium-temperature storage converter, and the phase change working medium of the medium-temperature storage converter is zinc; the phase change working medium of the high-temperature accumulator is aluminum;

b. the heat conductor is a capillary heat conductor or a coil heat conductor, and a heat conducting working medium is arranged in the heat conductor;

c. the heat exchanger is a cavity heat exchanger or a pipeline heat exchanger, and the wall of the heat exchanger is made of a material with high heat conductivity coefficient; the wall of the heat exchanger is fixedly connected with an inlet pipe nozzle and an outlet pipe nozzle of working medium.

B. The storage and exchange cavity is a cavity formed by a cavity body and a cavity cover or a cavity formed by a cavity body and a cavity door, the cavity body and the cavity cover are sealed in a working state, and the cavity body and the cavity door are also sealed in a working state;

C. in the storage and exchange cavity, except for the equipment required for heat storage, heat conduction and heat exchange, the rest space is vacuum or low-pressure gas, inert gas or normal-pressure gas.

D. The wall of the storage and exchange cavity is fixedly connected with an inlet and an outlet nozzle of a heat-conducting working medium, which are fixedly connected for short; the working medium is respectively communicated between the two inlet pipe mouths on the wall of the heat exchanger and the wall of the storage and exchange cavity and between the two outlet pipe mouths by pipelines;

E. the walls of the storage and exchange cavity, namely the cavity body, the cavity cover, the cavity bottom or the cavity door, are completely surrounded by heat insulation materials, or the whole storage and exchange device is arranged in the omnibearing heat insulation cavity.

2. The heat generators distributed in the phase change working medium are electric heat generators, and two interfaces of the electric heat generators are fixedly connected to the wall of the storage and exchange cavity.

3. The temperature of the heat conducting working medium in the high-temperature storage converter is higher than 658 ℃, and the temperature of the heat conducting working medium in the medium-temperature storage converter is higher than 419.4 ℃.

4. The heat exchanger with working medium is either with heat conducting fin or without heat conducting fin.

5. The heat insulating material is composed of at least two layers, wherein the inner layer close to the wall of the storage and exchange cavity is a light reflecting layer, and the outer layer is made of a material with extremely low heat conductivity coefficient.

Drawings

FIG. 1 is a front cross-sectional view of a phase change high capacity accumulator with an electric heater and a thermally conductive coil

FIG. 2 is a top view of FIG. 1

FIG. 3 is a front cross-sectional view of a phase change high capacity accumulator with a capillary bundle and no electric heat generator

FIG. 4 is a top view of FIG. 3

Detailed Description

In figure 1, 1 is an electric heater which is coiled in a phase change working medium in a storage and exchange cavity, 2 is an outlet pipe of the heat conduction working medium, 3 is an outlet pipe nozzle of the heat conduction working medium fixed on the wall of the storage and exchange cavity, 4 is an inlet pipe of the heat conduction working medium, 5 is an inlet pipe nozzle, 6 is a work working medium in a heat exchanger 8, the figure is a gas-liquid coexisting body, 7 is an interface of the electric heater which is fixed on the wall of the storage and exchange cavity, 8 is the heat exchanger and is internally filled with the work working medium, which can be a steam generator, 9 is a storage and exchange cavity cover, 10 is an inlet pipe nozzle of the phase change working medium, 11 is a work working medium jet nozzle which is respectively fixed on the walls of the storage and exchange cavity 9 and the heat exchanger 8 through

pipe nozzles

13 and 16, 12 is a valve of a charging and pumping pipe nozzle 14 which is used for charging or pumping inert gas or vacuumizing a gap in the storage and exchange cavity to prevent the phase change, it is vacuum or inert gas, 16 is the nozzle of the steam jet pipe 11 fixed on the heat exchanger 8, 17 is heat-preserving material, if the heat exchanger is installed in the omnibearing heat-preserving cavity, it doesn't use heat-preserving material, 18 is phase-change working medium, high-temperature phase-change working medium is aluminium, medium-temperature phase-change working medium is zinc, it uses the solution heat of aluminium and zinc to store heat, 19 is the sealing seam between the heat-exchanging cavity and the cavity cover. 20 is a storage and exchange cavity, 21 is an inlet nozzle of working medium fixed on the heat exchanger, 22 is a reflecting layer material for reflecting the heat radiation ray of the phase change working medium, 23 is an outlet nozzle of the phase change working medium, and 24 is an inlet nozzle of the working medium fixed on the wall of the storage and exchange cavity.

Fig. 2 is a top view of fig. 1. Wherever the same reference numbers are used in fig. 1, they refer to the same parts.

In fig. 3, 1 is a reflective layer material for reflecting the heat radiation of the phase change working medium, 2 is a heat retaining material body, 3 is a storage and exchange cavity, 4 is a seam between the storage and exchange cavity and a cavity cover, 5 is a capillary tube bundle, a heat conducting working medium is in the capillary tube, 6 is a heat exchanger or a steam generator, a work doing working medium is arranged in the heat exchanger, 7 is an inlet nozzle of the phase change working medium, 8 is a charging and pumping nozzle which fills inert gas into a gap in the storage and exchange cavity or is vacuumized to avoid oxidation of the phase change working medium, 9 is a valve of the charging and pumping tube, 10 is an inlet nozzle of the heat conducting working medium in the capillary tube bundle, 11 is an outlet nozzle of the work doing working medium or a steam jet tube, 12 is a cavity cover of the storage and exchange cavity, 13 is the work doing working medium and is a gas-liquid mixture, 14 is a heat conducting fin, 15 is a heat retaining layer cover, 16 is the phase change working medium or aluminum or zinc, 17 is an outlet, and 18 is an outlet nozzle of the heat-conducting working medium in the capillary bundle.

Fig. 4 is a top view of fig. 3, where like numerals indicate like parts to those in fig. 3.

After the phase change working medium is heated by the heat conduction working medium, the phase change working medium is changed from solid to liquid to absorb a large amount of latent heat for storage, when the heat conduction working medium stops supplying heat due to an external heat source, the phase change working medium transfers heat to the heat exchanger due to the lower temperature of the working medium in the heat exchanger, and the phase change working medium changes into solid after releasing the latent heat. If some kind of electric energy needs to be converted into heat energy for storage, an electric heat generator is installed in the accumulator.

The invention has the advantages that

1. The invention integrates the phase-change heat storage working medium and the heat exchanger with the working medium, so that the phase-change working medium directly heats the working medium, and the heat transfer efficiency is high.

2. The invention distributes the capillary tube bundle in the phase-change working medium, the capillary tube is thin, the surface area is relatively small, the capillary tube can bear high pressure, and if the capillary tube is made of stainless steel, the capillary tube can resist high temperature.

3. The aluminum and the zinc are selected as the phase change working media, the advantages are many, the heat conductivity coefficient of the aluminum and the zinc is high, and after the heat conduction working media are filled into the heat conductor, heat is quickly transmitted to all the phase change working media to be melted. And the latent heat capacity of the heat storage tank is large, the material consumption is small, the stored heat is large, and the heat storage cost is saved.

Claims

1. The utility model provides a phase transition holds and stores up changer, stores up the changer for short, and it includes stores up and trades chamber, phase transition working medium, heat conductor and heat exchanger, perhaps still includes the heat generator, its characterized in that:

D. The wall of the storage and exchange cavity is fixedly connected with an inlet and an outlet nozzle of a heat-conducting working medium, and the inlet and the outlet nozzles are fixedly connected, namely fixedly connected for short; the working medium is respectively communicated between the two inlet pipe mouths on the wall of the heat exchanger and the wall of the storage and exchange cavity and between the two outlet pipe mouths by pipelines;

2. The phase-change capacitance-to-capacitance converter as recited in claim 1, wherein: the heat generators distributed in the phase change working medium are electric heat generators, and two interfaces of the electric heat generators are fixedly connected to the wall of the storage and exchange cavity.

3. The phase-change capacitance-to-capacitance converter as recited in claim 1, wherein: the temperature of the heat conducting working medium in the high-temperature storage converter is higher than 658 ℃, and the temperature of the heat conducting working medium in the medium-temperature storage converter is higher than 419.4 ℃.

4. The phase-change capacitance-to-capacitance converter as recited in claim 1, wherein: the heat exchanger with working medium is provided with heat conducting fins or without heat conducting fins.

5. The phase-change capacitance-to-capacitance converter as recited in claim 1, wherein: the heat insulating material is composed of at least two layers, wherein the inner layer close to the wall of the storage and exchange cavity is a light reflecting layer, and the outer layer is made of a material with extremely low heat conductivity coefficient.