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Pressure energy recovery device of high pressure hydrogen storage tank for hydrogen internal combustion engine automobile

A technology for a hydrogen internal combustion engine and a recovery device, which is applied to steam engine devices, mechanical equipment, machines/engines, etc., and can solve problems such as pressure waste and energy waste.

Inactive Publication Date: 2018-12-11
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 internal combustion engine vehicles, the high-pressure hydrogen is depressurized through a throttle valve or an injector, and the pressure energy stored in the high-pressure gas cylinder is completely wasted during this process, resulting in an extreme waste of energy.

Method used

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  • Pressure energy recovery device of high pressure hydrogen storage tank for hydrogen internal combustion engine automobile
  • Pressure energy recovery device of high pressure hydrogen storage tank for hydrogen internal combustion engine automobile
  • Pressure energy recovery device of high pressure hydrogen storage tank for hydrogen internal combustion engine automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0022] Such as Figure 4 As shown, a hydrogen internal combustion engine automobile high-pressure hydrogen storage tank pressure energy recovery device 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), air turbocharger (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; Then it flows into the first-stage water-cooled heat exchanger (4) to absorb the heat of the cooling water of the internal combustion engine to achieve temperature rise; then flows into the second-stage piston expander (3) to continue to expand and reduce pressure to do external work, and then flows into the second-stage air-cooled heat exchanger Heater (4) absorbs air heat.

[0023] Such as Figure 4 As shown, using the two-stage expansion sys...

Embodiment example 2

[0025] Such as Figure 5 As shown, a hydrogen internal combustion engine automobile high-pressure hydrogen storage tank pressure energy recovery device 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. High-pressure hydrogen flows out of the high-pressure hydrogen tank (1) and flows into the expansion systems of each stage in turn; Output work, and then flow into the first-stage air-cooled heat exchanger (4) to absorb heat to achieve temperature rise; then flow into the second-stage scroll expander (3) to expand and reduce pressure, do work externally, and flow into the second-stage air-cooled heat exchanger The device (4) absorbs heat; finally, it flows into the three-stage scroll expander (3) to expand and reduce pressure, do work externally, and then flows into the three-s...

Embodiment example 3

[0028] Such as Figure 6 As shown, a hydrogen internal combustion engine automobile high-pressure hydrogen storage tank pressure energy recovery device 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), storage battery (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 realize the temperature rise, and the waste heat of the internal combustion engine is rationally used.

[0029] Such as Figure 6 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...

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Abstract

The invention provides a pressure energy recovery device of a high pressure hydrogen storage tank for a hydrogen internal combustion engine automobile. The pressure energy recovery device of the highpressure hydrogen storage tank comprises a high pressure hydrogen tank (1) and a pressure energy recovery system (2), wherein the pressure energy recovery system (2) comprises one or multi stages of expansion systems, and each stage of expansion system includes an expansion machine (3) and a heat exchanger (4). High pressure hydrogen flows out from the high pressure hydrogen tank (1) and sequentially flows into all stages of expansion systems. In all stages of expansion systems, the high pressure hydrogen is first subjected to cooling and pressure reduction through the expansion machines (3),outputs work externally, and then flows into the heat exchangers (4) to absorb heat, the working temperature of the high pressure hydrogen is increased, and the expansion process of the high pressurehydrogen is enabled to be close to the isothermal process so as to output more expansion work. The pressure energy recovery device of the high pressure hydrogen storage tank for the hydrogen internalcombustion engine automobile recovers the pressure energy in the high pressure hydrogen tank through the pressure energy recovery system (2), thereby improving the energy utilization rate.

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] Since the advent of the internal combustion engine for more than 100 years, people have made unremitting efforts to develop an economical and environmentally friendly engine, and have made great achievements. At present, the energy consumption of automobiles accounts for a quarter of the world's total energy consumption, and the number of automobiles will continue to increase in the next few decades, which will inevitably lead to a shortage of oil resources. In addition, gasoline and diesel oil produced from petroleum as raw materials will produce CO, HC and CO2 during combustion, which will cause great harm to the environment in which human beings live. Alternative fuels such as hydrogen, liquefied petroleum gas (LPG), compressed natural gas (CNG),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/00F01K25/08F01K7/02
CPCF01K7/02F01K25/08F01K27/00
Inventor 康慧芳那晓雨孙柏刚李程
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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