A high-temperature solid oxide water electrolysis hydrogen production system and process coupled with solar amino thermochemical energy storage and Karina cycle

A technology of solar energy ammonia and Karina cycle, which is applied in the direction of solar heating system, solar thermal energy, solar thermal power generation, etc., can solve the problems of increased cost, intermittent instability, and large installed capacity, so as to reduce the cost of hydrogen production and couple The system is simple and miniaturized, and the effect of reducing energy storage loss

Active Publication Date: 2022-04-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although solar photovoltaic electrolyzed water can achieve a solar hydrogen production efficiency of more than 30%, it has intermittent and unstable defects, which make the installed capacity greater than the actual operating power and increase the cost.

Method used

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  • A high-temperature solid oxide water electrolysis hydrogen production system and process coupled with solar amino thermochemical energy storage and Karina cycle

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Experimental program
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Effect test

Embodiment 1

[0028] The solar radiation intensity is 1000W / m 2 , the concentration ratio is 200, reflected by the heliostat field 1 to the endothermic reactor 2 (inner diameter 6.2mm, outer diameter 8.7mm, length 1220mm, the reactor material is made of Inconel625, and the reactor is filled with nickel-based catalyst particles, the diameter of the catalyst particles is 0.4-0.6mm), so that the endothermic reactor 2 reaches 800°C, first, the liquid ammonia at 25°C and 30MPa flows out from the liquid outlet at the bottom of the normal temperature pressure storage tank 4, and enters the first heat exchanger 3 Heat exchange and raise the temperature to 400°C, and then flow into endothermic reactor 2 for ammonia decomposition reaction (2NH 3 →3H 2 +N 2 ), the resulting syngas (H 2 +N 2 ) flows out from the outlet and enters the first heat exchanger 3, the heat exchange temperature is 28°C, and then enters the normal temperature and pressure storage tank 4 through the bottom air inlet and is s...

Embodiment 2

[0032] The solar radiation intensity is 1000W / m 2 , the concentration ratio is 200, reflected by the heliostat field 1 to the endothermic reactor 2 (inner diameter 6.2mm, outer diameter 8.7mm, length 1220mm, the reactor material is made of Inconel625, and the reactor is filled with nickel-based catalyst particles, the diameter of the catalyst particles is 0.4-0.6mm), so that the endothermic reactor reaches 800 °C. First, liquid ammonia at 25°C and 30MPa flows out from the liquid outlet at the bottom of the normal-temperature pressure storage tank 4, enters the first heat exchanger 3 for heat exchange and raises the temperature to 400°C, and then flows into the endothermic reactor 2 to undergo ammonia decomposition reaction (2NH 3 →3H 2 +N 2 ), the resulting syngas (H 2 +N 2 ) flows out from the outlet and enters the first heat exchanger 3 with a heat exchange temperature of 28°C, and then enters the normal temperature and pressure storage tank 4 through the bottom air inle...

Embodiment 3

[0036] The solar radiation intensity is 1000W / m 2 , the concentration ratio is 200, reflected by the heliostat field 1 to the endothermic reactor 2 (inner diameter 6.2mm, outer diameter 8.7mm, length 1220mm, the reactor material is made of Inconel625, and the reactor is filled with nickel-based catalyst particles, the diameter of the catalyst particles is 0.4-0.6mm), so that the endothermic reactor reaches 800 °C. First, liquid ammonia at 25°C and 30MPa flows out from the liquid outlet at the bottom of the normal-temperature pressure storage tank 4, enters the first heat exchanger 3 for heat exchange and raises the temperature to 400°C, and then flows into the endothermic reactor 2 to undergo ammonia decomposition reaction (2NH 3 →3H 2 +N 2 ), the resulting syngas (H 2 +N 2 ) flows out from the outlet and enters the first heat exchanger 3 with a heat exchange temperature of 26°C, and then enters the normal temperature and pressure storage tank 4 through the bottom air inle...

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Abstract

The invention discloses a high-temperature solid oxide water electrolysis hydrogen production system and process coupled with solar amino thermochemical energy storage and Karina cycle, the system includes amino thermochemical energy system, Karina cycle system and high-temperature solid oxidation Water electrolysis hydrogen production system, the amino thermochemical energy system and the high temperature solid oxide water electrolysis hydrogen production system realize heat exchange connection through the sixth heat exchanger, the third heat exchanger and the seventh heat exchanger, the amino thermochemical The heat exchange connection between the energy system and the Kalina cycle system is realized through the fifth heat exchanger, and the Kalina cycle system is connected with the high-temperature solid oxide water electrolysis hydrogen production system to provide raw materials for the high-temperature solid oxide water electrolysis hydrogen production system. The present invention can reduce the cost of concentrating and heat collection, reduce the loss of energy storage, and improve the cycle efficiency of power generation and the hydrogen production efficiency of electrolyzed water by reducing the energy absorption grade, storing at normal temperature, and improving the energy release grade.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production by electrolysis of water by solar energy, and specifically relates to a high-temperature solid oxide electrolysis water hydrogen production system coupled with solar amino thermochemical energy storage and Karina cycle and its technology. Background technique [0002] As the largest renewable energy source, solar energy can reduce human dependence on fossil energy and carbon emissions. In order to overcome the lack of intermittent solar energy, solar energy can be stored in fuels, such as hydrogen, methanol and other transportable energy carriers. Among them, hydrogen has the advantages of high energy density and no pollution, and is considered to be one of the best secondary energy sources. one. Therefore, solar hydrogen production is one of the important solutions to achieve carbon neutrality as soon as possible. [0003] Since the condensation pressure of ammonia water vapor is mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/042C25B15/08C25B15/00F24S23/70F24S60/20F24S10/30F03G6/06F01K21/04F01D15/10
CPCC25B1/042C25B15/08C25B15/083C25B15/00F24S23/70F24S60/20F24S10/30F03G6/06F01K21/04F01D15/10Y02P20/133Y02E60/36Y02E10/44Y02E10/46
Inventor 陈晨赵建国夏起冯帅明孔明民钱挺杜伟何兴
Owner ZHEJIANG UNIV OF TECH
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