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High-temperature heat-storing device using concrete and heat storage method thereof

A technology of heat storage and concrete, which is applied in the field of solar energy utilization, can solve the problems of inability to achieve high temperature storage, unfavorable heat storage and heat release, loose accumulation of iron ore, etc., and achieve stable high temperature performance, low cost, and large heat storage capacity Effect

Inactive Publication Date: 2008-03-05
GUANGDONG FIVESTAR SOLAR ENERGY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Due to its loose accumulation, iron ore is not conducive to the process of heat storage and heat release, and its thermal efficiency is low
Heat transfer oil and rock hybrid heat storage system cannot achieve high temperature storage due to the limitation of the boiling point of oil

Method used

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  • High-temperature heat-storing device using concrete and heat storage method thereof
  • High-temperature heat-storing device using concrete and heat storage method thereof

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] From Figure 1, the concrete heat storage block (1) is made of concrete with a density of 2.98g / cm 3 , the specific heat at constant pressure is 970J / K / kg, the thermal conductivity is 1.75W / m / K (room temperature 25°C), the refractoriness is 1000°C, the storage temperature is increased from 300°C to 600°C, and the size of the concrete heat storage block is 1m×1m×1.5m, the stored heat energy is 361.325kWh, and the total stored heat per unit volume can reach 240.8kWh / m 3 . The heat exchanger pipe (2) adopts a metal pipe or a non-metal pipe, the inner and outer walls of the pipe are kept smooth, the pipe (2) is buried in the concrete heat storage block (1), and maintains a suitable distance, and one end of the pipe (2) is a fluid The inlet (3), and the other end is the fluid outlet (4). When the concrete heat storage block (1) is heated, the high-temperature fluid flows in from the inlet (3) and flows out from the fluid outlet (4) at the other end, completing the heat stor...

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Abstract

The invention relates to high-temperature heat storage device utilizing concrete and its heat storing method. Its heat exchange pipeline is buried in concrete heat storage block, heat exchange fin is at external wall of the pipe, a valve is mounted at cold fluid inlet, cold fluid outlet is at the other end of cold fluid tank; a valve is mounted at heat fluid inlet, heat fluid outlet is at the other end of heat fluid tank. Heat exchange is carried out utilizing the difference of temperature between the concrete heat storage block and the heat exchange pipeline.

Description

technical field [0001] The invention relates to a high-temperature heat storage device using concrete and a heat storage method thereof. The heat exchanger pipeline is embedded in a concrete member to perform heat exchange due to temperature difference, which can be applied to solar power generation and belongs to the field of solar energy utilization. Background technique [0002] At present, there are three heat storage methods: sensible heat, latent heat and chemical energy. Sensible heat storage technology is the simplest and most mature, and it is widely used. Commonly used sensible heat storage materials are water, oil, masonry and cement. Latent heat storage, also known as phase change heat storage, is the use of materials to absorb or release latent heat during phase change to store and release heat. During the phase change process, the material is kept at a constant temperature and is currently the most widely used and studied heat storage. Way. Chemical energy h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D20/00F28D15/02
CPCY02E60/142Y02E60/14
Inventor 王志峰白凤武朱教群
Owner GUANGDONG FIVESTAR SOLAR ENERGY
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