Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for converting and storing solar energy with low-hydration magnesium chloride as energy storage working medium

A magnesium chloride hydrate and solar energy technology, which is applied in chemical instruments and methods, solar thermal power generation, and mechanical power generation by solar energy, can solve problems such as increasing the difficulty of operation and storage, limiting large-scale applications, and complicated production processes, and achieving energy efficiency. The effect of unbalanced supply and demand, reversible desorption/adsorption process, and large resource reserves

Active Publication Date: 2014-08-20
BEIJING UNIV OF CHEM TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, metal lithium and its compounds are scarce strategic resources, and the cost of adsorption media is too high, which limits its large-scale application.
Anhydrous MgCl 2 Has a strong water absorption capacity, however, on the one hand anhydrous MgCl 2 It is difficult to prepare (complex production process and high cost). On the other hand, it is extremely easy to absorb water and is very unstable, which increases the difficulty of operation and storage
At present, there is no report on the conversion and storage of solar energy by using hydrated magnesium chloride as an energy storage working fluid.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for converting and storing solar energy with low-hydration magnesium chloride as energy storage working medium
  • Method for converting and storing solar energy with low-hydration magnesium chloride as energy storage working medium
  • Method for converting and storing solar energy with low-hydration magnesium chloride as energy storage working medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Drop into 1 kilogram of bischofite in the primary dehydration fluidized bed 6, under sunlight irradiation, use 10 square meters of flat plate solar heat collectors to heat the bischofite in the primary dehydration fluidized bed 6, and the irradiation time is 5 hours, Control the temperature in the primary dehydration fluidized bed 6 to reach 120°C. In the process, close the shut-off valve 4, open the shut-off valve 5, derive the water vapor generated by the reaction, and use the steam as power generation; when the sunlight intensity is insufficient (18 time), close the shut-off valve 5, open the shut-off valve 4, pass the water vapor in the heat preservation water tank 2 into the primary dehydration fluidized bed 6, and control the water vapor pressure in the primary dehydration fluidized bed 6 to be 1.013×10 3 Pa, the temperature is 25°C, the heat released is passed to the thermal insulation water tank 3, and the generated water vapor is used to generate electricity, whe...

Embodiment 2

[0029] Drop into 0.5 kilogram of bischofite in the primary dehydration fluidized bed 6, under sunlight irradiation, use the flat type solar heat collector of 8 square meters to heat the bischofite in the primary dehydration fluidized bed 6, the irradiation time is 2 hours, Control the temperature in the primary dehydration fluidized bed 6 to be 130°C. In the process, close the shut-off valve 4, open the shut-off valve 5, derive the water vapor generated by the reaction, and use the steam as power generation; when the sunlight intensity is not enough (19 time), close the shut-off valve 5, open the shut-off valve 4, pass the water vapor in the heat preservation water tank 2 into the primary dehydration fluidized bed 6, and control the water vapor pressure in the primary dehydration fluidized bed 6 to be 3.262×10 3 Pa, temperature is 80 DEG C, and the heat that produces passes in the insulation water tank 3, and the steam that produces is used for generating electricity, and where...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
areaaaaaaaaaaa
heat storage densityaaaaaaaaaa
Login to View More

Abstract

The purpose of the present invention is to provide a method for converting and storing solar energy using low-hydrate magnesium chloride as a chemical adsorption energy storage working medium, which relates to the effective utilization of magnesium resources in salt lakes and the storage and conversion of solar energy. The specific method of the present invention is: during the time period when sunlight is irradiated sufficiently in the daytime, a flat-plate solar collector is used to receive the irradiation of sunlight, and the heat is transferred to the 2 •6H 2 O) In the primary dehydration ebullating bed, the temperature in the bed is raised to the dehydration temperature, at this time MgCl 2 •6H 2 O loses crystal water to form low hydrated magnesium chloride (MgCl 2 • 4H 2 O), realize the conversion of solar energy to chemical energy, and output the water vapor generated by the reaction to the steam turbine unit for power generation; when the night or sunlight is not enough, the water vapor enters the dehydration boiling bed containing low hydrated magnesium chloride to control the temperature Under the condition of partial pressure and water vapor, the hydration reaction of low hydrated magnesium chloride will increase the number of crystal water and regenerate MgCl 2 •6H 2 O, release heat of adsorption (hydration) to realize the conversion of chemical energy to thermal energy, and the released heat is transferred to the heat preservation water tank to generate water vapor and drive the steam turbine unit to generate electricity.

Description

technical field [0001] The invention belongs to the field of salt lake magnesium resource utilization and energy storage and conversion, in particular to the conversion and storage of solar energy by the adsorption / desorption process of hydrated magnesium chloride. Background technique [0002] Existing energy storage technologies can be divided into sensible heat energy storage, latent heat energy storage and chemical energy storage in three ways ):35-38]. The sensible heat energy storage technology has a simple device and low cost, but the energy storage density is low, and the output temperature fluctuation is too large; the latent heat energy storage energy storage density is high, and the heat storage and heat release processes are approximately isothermal, but it has not been very good. It can solve the problems of supercooling and precipitation; the chemical energy storage method has a large energy storage density and a large number of working fluids, which can be se...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/34C09K5/16F03G6/06
CPCY02E10/46
Inventor 项顼段雪鄢红
Owner BEIJING UNIV OF CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com