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Fresh water-electricity combined supply system coupling fuel cell complementary energy with absorption type water generator

A fuel cell stack, fuel cell technology, applied in water/sewage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as high energy consumption, limited water output, and inability to meet daily drinking requirements , to achieve the effect of avoiding energy consumption, avoiding electricity consumption, and high-efficiency freshwater-electricity co-supply potential

Active Publication Date: 2020-11-17
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective solution for FC to recycle water, and atmospheric water generator technology requires high energy consumption to generate sufficient water, and the water output is limited under low RH conditions, which usually cannot meet daily drinking

Method used

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  • Fresh water-electricity combined supply system coupling fuel cell complementary energy with absorption type water generator
  • Fresh water-electricity combined supply system coupling fuel cell complementary energy with absorption type water generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see figure 1 , the fresh water-electricity cogeneration system coupled with fuel cell residual energy and absorption water generator includes fuel cell stack, first heat exchanger H1, second heat exchanger H2, auxiliary cooling device, heat storage device and fresh water production device .

[0038] The fuel cell stack is a low temperature proton exchange membrane fuel cell (LT-PEMFC) or a high temperature proton exchange membrane fuel cell (HT-PEMFC); the operating temperature of the fuel cell stack is 60-80°C.

[0039] The auxiliary cooling device is a fan or a sky radiation cooling device.

[0040] The heat storage device is an insulated water tank.

[0041] The cathode outlet of the fuel cell stack is connected to the inlet of the first heat exchanger H1 through a pipeline, and the outlet of the first heat exchanger H1 is connected to the port of the high-humidity air passage 1 of the fresh water production device; the outlet of the first heat exchanger H1 An aux...

Embodiment 2

[0052] In the application background of power supply and water supply in a small town, a 1MW high-temperature proton exchange membrane fuel cell (HT-PEMFC) stack is used under the condition of an ambient humidity of 0.6. The operating temperature of the fuel cell is 70°C, and the 500kg thermal insulation water tank and auxiliary cooling device are air-cooled. 50m 2 The contact area of ​​heat sink, FC exhaust gas and salt solution is set to 100m 2 , The contact area between the calcium chloride solution (CaCl2) with a concentration of 86% and the high-humidity space is 50m 2 1. The working medium of the thermosiphon is 0.4 bar low-pressure water in a liquid-gas two-phase state at 70°C. Under the conditions set above, the water production rate of liquid water is about 500kg / hr.

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Abstract

The invention relates to a fresh water combined supply system coupling fuel cell complementary energy with an absorption type water generator, and belongs to the technical field of new energy. The system comprises a fuel cell stack with the working temperature of 60-80 DEG C, a first heat exchanger, a second heat exchanger, an auxiliary cooling device, a heat storage device and a fresh water production device, wherein a cathode outlet of the fuel cell stack is communicated with an inlet of the first heat exchanger through a pipeline; an outlet of the first heat exchanger is communicated with aport of a high-humidity air channel of the fresh water production device; the fresh water production device comprises a salt solution tank and a moisture space; a salt solution with the concentrationof 85-88% is arranged in the salt solution tank; a thermosiphon is arranged in the salt solution tank; a thermosiphon circulation loop is formed among the thermosiphon, the second heat exchanger anda shell of the first heat exchanger; a working medium of the thermosyphon circulation loop is a substance which is in a liquid-gas two-phase state at the temperature of 60-80 DEG C. By utilizing the waste heat of the FC, on one hand, the relative humidity of input air is improved through high-humidity gas, on the other hand, adsorbent dehydration is achieved, and finally the efficient fresh watercombined supply efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to fuel cell and absorption water generator technologies. [0002] technical background [0003] my country is the most populous country in the world, and energy and water consumption from the construction industry account for a considerable proportion of the country's overall energy consumption. At present, energy for buildings is mainly provided by fossil fuel power plants, which will generate large amounts of carbon dioxide (CO 2 ) and other harmful gases. At the same time, traditional thermal water desalination plants are mostly used in regions lacking fresh water reserves to prepare fresh water, while the thermal energy required by the equipment is still provided by burning fossil fuels. Therefore, the Chinese government has invested a huge amount of money to further improve the existing "new energy" system, including technologies such as fuel cells, solar energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/16E03B3/28B01D53/26
CPCC02F1/04C02F1/16E03B3/28B01D53/263B01D2257/80Y02P70/50
Inventor 关学新高大统裴刚
Owner UNIV OF SCI & TECH OF CHINA