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Tank-free flat type phase change heat storage solar heat utilization unit

A phase-change heat storage and solar thermal technology, which is applied in solar thermal devices, solar heat storage, solar thermal energy, etc., can solve problems such as the application of phase-change heat storage materials that have not been considered, so as to avoid excessive radiation heat loss and improve safety Sexuality, the effect of eliminating easy scaling

Inactive Publication Date: 2011-08-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent with the patent application number CN03103084.X, the utility model with the patent application number CN98233848.1, CN200320113612.9, etc. are all related to flat-plate solar water heaters, but they have not considered applying phase change heat storage materials to them

Method used

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  • Tank-free flat type phase change heat storage solar heat utilization unit
  • Tank-free flat type phase change heat storage solar heat utilization unit
  • Tank-free flat type phase change heat storage solar heat utilization unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 As shown, a tankless plate type phase change heat storage type solar heat utilization device, which includes a metal shell 1, a metal container 3, a heat exchange pipe 5, a thermocouple 7, an auxiliary heating plate 9, and a double-layer transparent vacuum cover plate 10 The upper end of the metal shell 1 is an open end, the metal container 3 is located in the metal shell 1 (the metal container is a box structure), the upper end of the metal shell 1 is welded and fixed with the metal container 3, and a seal is formed between the metal container 3 and the metal shell 1 The thermal insulation cavity (the thermal insulation cavity is provided with reinforcing ribs to ensure the fixing and support of the metal shell 1 to the metal container), the thermal insulation cavity is filled with thermal insulation material 2; the metal container 3 and the metal shell 1 have inlet joint holes on one side , the outlet...

Embodiment 2

[0029] Embodiment 2 is basically the same as Embodiment 1, except that the phase change heat storage material is Na 2 SO 4 10H 2 O, the heat exchange medium is cold water, and the density of the heat storage material is 1500kg / m 3 , the latent heat of phase transition is 247kJ / kg, and the phase transition temperature range is 30-36°C. When charging, the heat storage material undergoes a phase change under sunlight radiation; when releasing heat, 20°C cold water is passed into the inlet, the water flow rate in the tube is about 0.5m / s, and the water temperature at the outlet after heat exchange is 31°C , The heat exchange process in the device is sufficient and reversible, and the heat exchange efficiency is high, about 82-84%. It can be used as a heat storage device for solar heat utilization.

Embodiment 3

[0031] Embodiment 3 is basically the same as Embodiment 1, the difference is:

[0032] The phase change heat storage material used in the above device is Ba 2 (OH) 2 ·8H 2 O, the heat exchange medium is cold water, and the density of the heat storage material is 2000kg / m 3 , the latent heat of phase transition is 267kJ / kg, and the phase transition temperature range is 78-88°C. When charging, the heat storage material undergoes a phase change under sunlight radiation. When releasing heat, 20°C cold water is passed into the inlet, and the water flow rate in the tube is about 0.5m / s. After heat exchange, the water temperature at the outlet is 72°C , The heat exchange process in the device is sufficient and reversible, the heat exchange efficiency is high, and the heat exchange efficiency reaches 82-85%. It can be used as a heat storage device for solar heat utilization.

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Abstract

The utility model relates to a tank-free flat type phase change heat storage solar heat utilization unit, which is applied to the field of medium-low temperature solar heat utilization. The tank-free flat type phase change heat storage solar heat utilization unit is characterized by comprising a metal shell, a metal container, heat exchanging pipelines, a thermoelectric couple, an auxiliary heating plate, and a double-layer transparent vacuum cover plate; the metal container is arranged in the metal shell; a sealed insulating cavity is formed between the metal container and the metal shell; the heat exchanging pipelines are situated in the metal container, and are arranged into 2-10 layers; the thermoelectric couple and the auxiliary heating plate are arranged in the metal container; a phase change heat storage material is sealed in the metal container; the heat exchanging pipelines, the thermoelectric couple, and the auxiliary heating plate are all buried into the phase change heat storage material; a selective absorption coating is sprayed on the upper surface of the metal container; and the double-layer transparent vacuum cover plate is covered on the metal container. The tank-free flat type phase change heat storage solar heat utilization unit has the characteristics of convenient installation and connection, and higher heat storing / exchanging efficiency.

Description

technical field [0001] The invention relates to a tankless plate type phase change heat storage type solar heat utilization device, which is applied in the field of medium and low temperature solar heat utilization, and can be used to provide domestic hot water, house heating, and agricultural products according to the difference of the working medium in the device. dry etc. Background technique [0002] Energy is the basis for human survival and development, and sustainable development is the common aspiration and goal of all human beings. Vigorously developing and utilizing renewable energy is the most important policy measure for establishing a sustainable energy system, and it is also my country's long-term energy development strategy. Among various renewable energy sources, solar energy has attracted widespread attention due to its unique "infinity" of reserves, universality of existence, and cleanness of development and utilization. [0003] In my country, solar ener...

Claims

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Application Information

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IPC IPC(8): F24J2/34F24J2/46F24J2/50F24J2/51
CPCY02E10/40F24S10/25F24S10/746F24S60/10F24S70/225F24S70/25F24S2080/502F28D20/02Y02E10/44Y02E60/14Y02E70/30
Inventor 程晓敏何高胡铁铮李元元张时安朱教群周卫兵
Owner WUHAN UNIV OF TECH
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