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Method for manufacturing prefabricated concrete heat storage module for solar heat power generation

A technology of solar thermal power generation and concrete blocks, which is applied in the direction of solar thermal power generation, energy storage, solar thermal devices, etc., and can solve the problems of huge maintenance costs, high prices, and low costs

Inactive Publication Date: 2010-11-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In fact, solar thermal power generation heat storage materials not only need excellent comprehensive performance, but also need low cost. In many cases, transportation cost and production cost are also very important. In Document 4, the raw material used by the German Aerospace Center (DLR) is alumina And iron oxide, its raw materials are relatively expensive, and it is cast on site, which is feasible in small-scale experiments, but in the future industrial production, it is often selected in deserts with long sunshine hours and high radiation intensity Therefore, in many cases, it is not realistic to use on-site pouring. Not only is there a shortage of water in desert areas, but also there is no supporting facilities for transportation and electricity, and the subsequent maintenance costs are also very huge.

Method used

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  • Method for manufacturing prefabricated concrete heat storage module for solar heat power generation
  • Method for manufacturing prefabricated concrete heat storage module for solar heat power generation
  • Method for manufacturing prefabricated concrete heat storage module for solar heat power generation

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Experimental program
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Embodiment 1

[0026] The heat storage module is a cuboid with a length of 1.5m×0.8m×0.8m. The heat exchange pipe is made of heat-resistant stainless steel with an inner diameter of 6mm and an outer diameter of 12mm. The arrangement is 4 in each row and arranged in 3 rows. The spacing is 10mm, and the composition of the heat storage concrete is: basalt aggregate 37%, copper slag 33%, aluminate cement 8%, activated alumina powder 5%, silicon micropowder 5%, kyanite powder 7%, natural graphite Powder 5%. After the raw materials are dry-mixed evenly, add 5% water, mix evenly and place them in a steel mold with heat exchange pipes, demould after 24 hours, maintain in water at 20-25°C for 72 hours, and then dry at 100 Bake at -120°C for 24 hours. The density of heat storage material is 2.86g / cm 3 , the compressive strength of the concrete material is 60.8MPa, the flexural strength is 10.2MPa, and the volume heat capacity measured on the comprehensive thermal analyzer is 125kWh / m 3, thermal con...

Embodiment 2

[0028] The heat storage module is a cuboid with a length of 1.5m×0.8m×0.8m. The heat exchange pipe is made of heat-resistant stainless steel with an inner diameter of 6mm and an outer diameter of 12mm. The arrangement is 4 in each row and arranged in 3 rows. The spacing is 10mm, 35% of basalt aggregate, 35% of steel slag aggregate, 6% of aluminate cement, 4% of activated alumina powder, 5% of silica powder, 11% of kyanite powder, and 4% of natural graphite powder. After the raw materials are dry-mixed evenly, add 5.5% water, mix evenly, place in a steel mold with a heat exchange pipe, demould after 24 hours, and maintain in water at a temperature of 20-25°C for 72 hours. Bake at 100-120°C for 24 hours. The density of heat storage material is 2.96g / cm 3 , the compressive strength of the material is 70.2MPa, and the flexural strength σ b =11.5MPa, volume heat capacity 128kWh / m 3 , thermal conductivity 1.82W / mK, refractoriness: 900°C. When a large-volume heat storage concrete...

Embodiment 3

[0030] The heat storage module is a cuboid with a length of 1.6m×0.85m×0.85m. The heat exchange pipe is made of heat-resistant stainless steel with an inner diameter of 6mm and an outer diameter of 12mm. The arrangement is 4 in each row and arranged in 3 rows. The spacing is 10mm, and the composition of heat storage concrete is: basalt aggregate 36%, copper slag 35%, aluminate cement 9%, activated alumina powder 5%, silica micropowder 4%, kyanite powder 6%, natural graphite Powder 5%. After the raw materials are dry-mixed evenly, add 5% water, mix evenly and place them in a steel mold with heat exchange pipes, demould after 24 hours, maintain in water at 20-25°C for 72 hours, and then dry at 100 Bake at -120°C for 24 hours. The density of heat storage material is 2.86g / cm 3 , the compressive strength of the concrete material is 62.9MPa, the flexural strength is 11.3MPa, and the volume heat capacity measured on the comprehensive thermal analyzer is 130kWh / m 3 , thermal condu...

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Abstract

The invention relates to a prefabricated concrete heat storage module for solar heat power generation. The prefabricated concrete heat storage module consists of two heat storage concrete blocks which have the same structure, wherein a heat exchange tube is arranged in each heat storage concrete block; the outer wall of each heat exchange tube is provided with a plurality of uniformly distributed heat exchange stainless steel fins; each heat storage concrete block is provided with a plurality of communicated concave connection grooves; and in assembling, the concave connection grooves of the two heat storage concrete blocks are connected into one body by the insertion of connecting rods. The manufacturing method comprises the following steps of: uniformly mixing raw materials by a dry process; adding water in an amount which is 4 to 6 percent based on the weight of the raw materials; uniformly mixing the raw materials and the water; placing a mixture in a steel mould which is provided with the heat exchange tube; demoulding after 24 hours; curing a product in water at the temperature of between 20 to 25 DEG C for 72 hours; and drying to form the prefabricated concrete heat storage module, wherein the raw materials comprise the following components: basalt aggregate, slag, aluminate cement, activated aluminum oxide powder, silicon powder, cyanite powder and natural graphite powder. The method for manufacturing the prefabricated concrete heat storage module for the solar heat power generation has the advantages of simple construction, low cost, convenient transportation, stable performance and the like.

Description

technical field [0001] The invention relates to a heat storage material module, in particular to a preparation method of a concrete material prefabricated heat storage module for solar thermal power generation. Background technique [0002] Heat storage materials used in solar power generation should meet the following requirements: heat storage materials should have high energy density; heat storage materials and heat exchange liquids should have good heat conduction; heat storage materials should have good chemical and mechanical stability; The heat storage material has good chemical compatibility with the heat exchanger and the heat exchange liquid; it should be fully reversible during the heat storage and heat release cycle; low cost. Heat storage scheme design is an important technology in solar steam power generation. The performance and cost of heat storage materials are one of the main factors that determine the construction and operation costs of large-scale solar p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/46F28D20/00C04B28/06C04B14/04C04B18/14C04B18/12
CPCY02E10/40Y02E70/30Y02E60/142Y02E60/14Y02W30/91
Inventor 周卫兵朱教群郭成州黎锦清童雨舟
Owner WUHAN UNIV OF TECH
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