Pressure energy recycle device for high-pressure hydrogen storage tank of hydrogen fuel cell automobile

A fuel cell and recycling device technology, which is applied to fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as pressure waste and energy waste, and achieve the effect of saving energy consumption and facilitating safe driving.

Pending Publication Date: 2017-08-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing hydrogen fuel cell vehicles, the high-pressure hydrogen is decompressed through a throttle valve or an injector to supply the low-pressure h...

Method used

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  • Pressure energy recycle device for high-pressure hydrogen storage tank of hydrogen fuel cell automobile
  • Pressure energy recycle device for high-pressure hydrogen storage tank of hydrogen fuel cell automobile
  • Pressure energy recycle device for high-pressure hydrogen storage tank of hydrogen fuel cell automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0021] Such as Figure 5 As shown, a high-pressure hydrogen storage tank pressure energy recovery device for a hydrogen energy vehicle includes: a high-pressure hydrogen tank (1), a pressure energy recovery system (2), and the pressure energy recovery system (2) includes an expander (3) And heat exchanger (4), compressor (5). This case adopts a two-stage expansion system. The high-pressure hydrogen flows out from the high-pressure hydrogen tank (1) and flows into the expansion systems at all levels in sequence; work, and then flow into the primary water-cooled heat exchanger (4) to absorb the heat of fuel cell cooling water to achieve temperature rise; then flow into the secondary piston expander (3) to continue to expand and reduce pressure to do external work, and then flow into the secondary air-cooled Heat exchanger (4) absorbs air heat.

[0022] Such as Figure 5 As shown, using the two-stage expansion system, this part of the work can drive the air compressor (5) to r...

Embodiment example 2

[0024] Such as Figure 6 As shown, a high-pressure hydrogen storage tank pressure energy recovery device for a hydrogen energy vehicle includes: a high-pressure hydrogen tank (1), a pressure energy recovery system (2), and the pressure energy recovery system (2) includes an expander (3) And heat exchanger (4), transmission mechanism (6). This case adopts a three-stage expansion system, and the high-pressure hydrogen flows out from the high-pressure hydrogen tank (1) and flows into the expansion system at all stages in sequence. In the first-stage expansion system, the hydrogen flows into the first-stage scroll expander (3) to lower the temperature and pressure, output power to the outside, and then flows into the first-stage air-cooled heat exchanger (4) to absorb heat to achieve temperature rise; then flows into the second-stage The first-stage scroll expander (3) expands and reduces pressure, does external work, and flows into the second-stage air-cooled heat exchanger (4) ...

Embodiment example 3

[0027] Such as Figure 7 As shown, a high-pressure hydrogen storage tank pressure energy recovery device for a hydrogen energy vehicle includes: a high-pressure hydrogen tank (1), a pressure energy recovery system (2), and the pressure energy recovery system (2) includes an expander (3) And heat exchanger (4), generator (7), accumulator (8). In this case, one-stage expansion is adopted. High-pressure hydrogen flows out of the high-pressure hydrogen tank (1), and then passes through the radial axial flow expander (3) to cool down and reduce pressure, output power to the outside, and then flows into the water-cooled heat exchanger (4) to absorb the cooling cycle. The heat of the water is used to achieve temperature rise, and the waste heat of the fuel cell is rationally used.

[0028] Such as Figure 7 As shown, the first-stage expansion is used to do external work, and this part of the expansion work drives the generator (7) to output electric work to complete the charging of...

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PUM

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Abstract

The invention provides a pressure energy recycle device for a high-pressure hydrogen storage tank of a hydrogen fuel cell automobile. The pressure energy recycle device comprises a high-pressure hydrogen tank (1) and a pressure energy recycle system (2), wherein the pressure energy recycle system (2) comprises a one-stage or multi-stage expansion system, each-stage expansion system comprises an expansion machine (3) and a heat exchanger (4), and high-pressure hydrogen flows out of the high-pressure hydrogen tank (1) and sequentially flows into each-stage expansion system; and in each-stage expansion system, temperature and pressure are reduced by the expansion machine (3), work is externally output and flows into the heat exchanger (4) for heat absorption and temperature rising, the working temperature is increased, so that the constant-temperature process is approximated during the expansion process of the pressure energy recycle device, and more expansion work is output. By the pressure energy recycle system (2), pressure energy in the high-pressure hydrogen tank is recycled, and the energy utilization ratio is improved.

Description

technical field [0001] The invention relates to an energy recovery device for a hydrogen energy vehicle, in particular to a pressure energy recovery device for a high-pressure hydrogen storage tank. Background technique [0002] With the development of fuel cell technology, hydrogen fuel cell vehicles are gradually becoming a research and development hotspot among the world's automakers. Hydrogen, as fuel for fuel cell vehicles, needs to be stored in the vehicle. Commonly used hydrogen storage methods include high-pressure gaseous hydrogen storage, liquefied hydrogen storage, metal hydride hydrogen storage, activated carbon hydrogen storage, carbon nanotube hydrogen storage, etc. Among them, the most commonly used hydrogen storage method is high-pressure gaseous hydrogen storage. Since hydrogen is the gas with the smallest known density in the world, it needs to be compressed to meet the requirements of automobile driving. The hydrogen storage pressure abroad has reached 7...

Claims

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Application Information

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IPC IPC(8): H01M8/04746H01M8/04029H01M8/04014
CPCH01M8/04014H01M8/04029H01M8/04753H01M8/04776H01M2250/20Y02E60/50
Inventor 康慧芳那晓雨施新张继红
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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