CN-122000580-A - Energy accumulator

CN122000580ACN 122000580 ACN122000580 ACN 122000580ACN-122000580-A

Abstract

The disclosure relates to an energy accumulator, comprising an energy storage unit, wherein the energy storage unit comprises a shell, a primary energy storage carrier layer and a secondary energy storage carrier layer, a cavity is formed in the shell, an inlet and an outlet communicated with the cavity are formed in the shell, the primary energy storage carrier layer comprises a plurality of primary solid particles, the plurality of primary solid particles are arranged in the cavity to form the primary energy storage carrier layer with a first thickness, the secondary energy storage carrier layer comprises a plurality of secondary solid particles, the plurality of secondary solid particles are arranged in the cavity to form the secondary energy storage carrier layer with a second thickness, the secondary energy storage carrier layer is stacked above the primary energy storage carrier layer and is positioned at the downstream of the primary energy storage carrier layer, and the particle size of the secondary solid particles is smaller than that of the primary solid particles. Therefore, the fluid can exchange heat with the primary solid particles of the primary energy storage carrier layer and the secondary solid particles of the secondary energy storage carrier layer in sequence, so that the cascade storage of the energy in the fluid can be realized, and the energy storage efficiency is improved.

Inventors

LIANG YONGSHI
ZHAO XIANGLONG
WANG NAN
ZHANG JINHUA
HE LIXIN
LIU BING
WANG HONGGANG

Assignees

国家能源投资集团有限责任公司
北京低碳清洁能源研究院

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (10)

1. An accumulator comprising an energy storage unit, the energy storage unit comprising: a housing having a cavity therein, an inlet and an outlet being formed on the housing to communicate with the cavity; the first-stage energy storage carrier layer comprises a plurality of first-stage solid particles, and the first-stage solid particles are arranged in the cavity to form the first-stage energy storage carrier layer with a first thickness; A secondary energy storage carrier layer comprising a plurality of secondary solid particles disposed within the cavity to form a secondary energy storage carrier layer having a second thickness, the secondary energy storage carrier layer being stacked above the primary energy storage carrier layer and downstream of the primary energy storage carrier layer; The particle size of the secondary solid particles is smaller than that of the primary solid particles.
2. The accumulator of claim 1, wherein the diameter of the cavity increases gradually in a direction from an inlet of the cavity to an outlet of the cavity.
3. The accumulator of claim 1, wherein the energy storage unit further comprises a tertiary energy storage carrier layer comprising a plurality of tertiary solid particles disposed within the cavity to form a tertiary energy storage carrier layer having a third thickness; The tertiary energy storage carrier layer is located the low reaches of second grade energy storage carrier layer and with second grade energy storage carrier layer interval sets up, just tertiary solid particle's particle diameter is the same with the particle diameter of primary solid particle.
4. The accumulator of claim 3, wherein the housing includes a first section, a second section, and a third section, the second section being connected between the first section and the third section, the primary energy storage carrier layer and the secondary energy storage carrier layer being disposed within the first section, the tertiary energy storage carrier layer being disposed within the third section, the inlet being formed on the first section, the outlet being formed on the third section, the second section having an inner diameter that gradually increases in a direction from the inlet to the outlet.
5. The accumulator of any one of claims 1-4, wherein the energy storage unit further comprises a radial distributor disposed within the cavity and configured to promote activity of the secondary solid particles of the secondary energy storage carrier layer in a radial direction of the housing.
6. The accumulator of claim 5, wherein the radial distributor includes a shunt tube in communication with the fluid input of the accumulator, the shunt tube having a plurality of spaced apart shunt holes disposed thereon, the shunt tube being disposed on an inner wall of the housing about a circumference of the housing.
7. The accumulator of claim 6, wherein the diverter aperture is upwardly sloped.
8. The accumulator of any one of claims 1-4, comprising a plurality of said accumulator units, an outlet of an upstream one of said accumulator units being in communication with an inlet of a midstream one of said accumulator units, an outlet of a midstream one of said accumulator units being in communication with an inlet of a downstream one of said accumulator units.
9. The accumulator of any one of claims 1-4, wherein the first thickness is greater than the second thickness.
10. The accumulator of any one of claims 1-4, wherein a dimension of the cavity in a height direction is greater than a sum of the first thickness and the second thickness.

Description

Energy accumulator Technical Field The present disclosure relates to the technical field of accumulators, and in particular, to an accumulator. Background The carrier in the accumulator can be divided into solid, liquid and phase change carrier according to the phase state, the solid carrier is simple in operation and type, low in cost and most widely applied. In the related art, the solid carrier is generally fixedly arranged in the accumulator (i.e. can not move in the accumulator), and the fluid needs a long time to achieve the heat exchange requirement with the solid carrier, so that the problem of low heat transfer efficiency exists. Disclosure of Invention An object of the present disclosure is to provide an accumulator to solve technical problems in the related art. In order to achieve the above object, the present disclosure provides an accumulator including an energy storage unit including: a housing having a cavity therein, an inlet and an outlet being formed on the housing to communicate with the cavity; the first-stage energy storage carrier layer comprises a plurality of first-stage solid particles, and the first-stage solid particles are arranged in the cavity to form the first-stage energy storage carrier layer with a first thickness; A secondary energy storage carrier layer comprising a plurality of secondary solid particles disposed within the cavity to form a secondary energy storage carrier layer having a second thickness, the secondary energy storage carrier layer being stacked above the primary energy storage carrier layer and downstream of the primary energy storage carrier layer; The particle size of the secondary solid particles is smaller than that of the primary solid particles. Optionally, the diameter of the cavity increases gradually in a direction from the inlet of the cavity to the outlet of the cavity. Optionally, the energy storage unit further comprises a tertiary energy storage carrier layer, the tertiary energy storage carrier layer comprising a plurality of tertiary solid particles, the plurality of tertiary solid particles disposed within the cavity to form a tertiary energy storage carrier layer having a third thickness; The tertiary energy storage carrier layer is located the low reaches of second grade energy storage carrier layer and with second grade energy storage carrier layer interval sets up, just tertiary solid particle's particle diameter is the same with the particle diameter of primary solid particle. Optionally, the shell comprises a first section, a second section and a third section, the second section is connected between the first section and the third section, the primary energy storage carrier layer and the secondary energy storage carrier layer are arranged in the first section, the tertiary energy storage carrier layer is arranged in the third section, the inlet is formed on the first section, the outlet is formed on the third section, and the inner diameter of the second section is gradually increased along the direction from the inlet to the outlet. Optionally, the energy storage unit further comprises a radial distributor, wherein the radial distributor is arranged in the cavity and is used for improving the activity of the secondary solid particles of the secondary energy storage carrier layer in the radial direction of the shell. Optionally, the radial distributor comprises a shunt tube, the shunt tube is communicated with the fluid input end of the energy accumulator, a plurality of diversion holes arranged at intervals are formed in the shunt tube, and the shunt tube is circumferentially arranged on the inner wall of the shell around the shell. Optionally, the diversion hole is inclined upwards. Optionally, the accumulator comprises a plurality of energy storage units, wherein an outlet of the energy storage unit positioned at the upstream of the plurality of energy storage units is communicated with an inlet of the energy storage unit positioned at the midstream, and an outlet of the energy storage unit positioned at the midstream of the plurality of energy storage units is communicated with an inlet of the energy storage unit positioned at the downstream of the plurality of energy storage units. Optionally, the first thickness is greater than the second thickness. Optionally, the dimension of the cavity in the height direction is greater than the sum of the first thickness and the second thickness. Through the technical scheme, as the primary energy storage carrier layer and the secondary energy storage carrier layer are arranged in the cavity, and the particle size of the secondary solid particles of the secondary energy storage carrier layer is smaller than that of the primary solid particles of the primary energy storage carrier layer, when fluid enters the cavity from the inlet of the shell, heat exchange can be carried out with the primary solid particles of the primary energy storage carrier layer positioned below, and meanwhile, the