CN2802736Y

CN2802736Y - Low noise fuel battery generating system

Info

Publication number: CN2802736Y
Application number: CNU2005200393971U
Authority: CN
Inventors: 胡里清; 夏建伟; 章波; 李丽
Original assignee: Shanghai Shen Li High Tech Co Ltd
Current assignee: Shanghai Shenli Technology Co Ltd
Priority date: 2005-02-01
Filing date: 2005-02-01
Publication date: 2006-08-02
Anticipated expiration: 2015-02-01

Abstract

The utility model relates to a low noise fuel battery generating system, which includes a fuel battery pile, a hydrogen storage device, a hydrogen pressure reducing valve, a hydrogen humidifier, a hydrogen water-vapor separator, a hydrogen cycle pump, a water tank, a cooling water circulation pump, a cooling water radiator, an air filtration device, an air compressor and an air humidifier. The hydrogen cycle pump, the cooling water circulation pump or the air compressor are encapsulated by adopting anti-noise material, noise-absorbing material or acoustic insulating material and they are surrounded in the anti-noise material, the noise-absorbing material or the acoustic insulating material. Compared with the prior art, the utility model adopts anti-noise material, noise absorbing material or acoustic insulating material to encapsulate the main noise component of the fuel battery that can reduce the shock and noise caused by the noise component, when the fuel battery generating system served as an engine drives the automobile to move, the comfort characteristic of the passenger sitting can be greatly enhanced.

Description

Low-noise fuel cell power generation system

Technical Field

The utility model relates to a fuel cell especially relates to a low noise fuel cell power generation system.

Background

An electrochemical fuel cell is a device capable of converting hydrogen and an oxidant into electrical energy and reaction products. The inner core component of the device is a Membrane Electrode (MEA), which is composed of a proton exchange Membrane and two porous conductive materials sandwiched between two surfaces of the Membrane, such as carbon paper. The membrane contains a uniform and finely dispersed catalyst, such as a platinum metal catalyst, for initiating an electrochemical reaction at the interface between the membrane and the carbon paper. The electrons generated in the electrochemical reaction process can be led out by conductive objects at two sides of the membrane electrode through an external circuit to form a current loop.

At the anode end of the membrane electrode, fuel can permeate through a porous diffusion material (carbon paper) and undergo electrochemical reaction on the surface of a catalyst to lose electrons to form positive ions, and the positive ions can pass through a proton exchange membrane through migration to reach the cathode end at the other end of the membrane electrode. At the cathode end of the membrane electrode, a gas containing an oxidant (e.g., oxygen), such as air, forms negative ions by permeating through a porous diffusion material (carbon paper) and electrochemically reacting on the surface of the catalyst to give electrons. The anions formed at the cathode end react with the positive ions transferred from the anode end to form reaction products.

In a pem fuel cell using hydrogen as the fuel and oxygen-containing air as the oxidant (or pure oxygen as the oxidant), the catalytic electrochemical reaction of the fuel hydrogen in the anode region produces hydrogen cations (or protons). The proton exchange membrane assists the migration of positive hydrogen ions from the anode region to the cathode region. In addition, the proton exchange membrane separates the hydrogen-containing fuel gas stream from the oxygen-containing gas stream so that they do not mix with each other to cause explosive reactions.

In the cathode region, oxygen gains electrons on the catalyst surface, forming negative ions, which react with the hydrogen positive ions transported from the anode region to produce water as a reaction product. In a proton exchange membrane fuel cell using hydrogen, air (oxygen), the anode reaction and the cathode reaction can be expressed by the following equations:

and (3) anode reaction:

and (3) cathode reaction:

in a typical pem fuel cell, a Membrane Electrode (MEA) is generally placed between two conductive plates, and the surface of each guide plate in contact with the MEA is die-cast, stamped, or mechanically milled to form at least one or more channels. The flow guide polar plates can be polar plates madeof metal materials or polar plates made of graphite materials. The fluid pore channels and the diversion trenches on the diversion polar plates respectively guide the fuel and the oxidant into the anode area and the cathode area on two sides of the membrane electrode. In the structure of a single proton exchange membrane fuel cell, only one membrane electrode is present, and a guide plate of anode fuel and a guide plate of cathode oxidant are respectively arranged on two sides of the membrane electrode. The guide plates are used as current collector plates and mechanical supports at two sides of the membrane electrode, and the guide grooves on the guide plates are also used as channels for fuel and oxidant to enter the surfaces of the anode and the cathode and as channels for taking away water generated in the operation process of the fuel cell.

In order to increase the total power of the whole proton exchange membrane fuel cell, two or more single cells can be connected in series to form a battery pack in a straight-stacked manner or connected in a flat-laid manner to form a battery pack. In the direct-stacking and serial-type battery pack, two surfaces of one polar plate can be provided with flow guide grooves, wherein one surface can be used as an anode flow guide surface of one membrane electrode, and the other surface can be used as a cathode flow guide surface of another adjacent membrane electrode, and the polar plate is called a bipolar plate. A series of cells are connected together in a manner to form a battery pack. The battery pack is generally fastened together into one body by a front end plate, a rear end plate and a tie rod.

A typical battery pack generally includes: (1) the fuel (such as hydrogen, methanol or hydrogen-rich gas obtained by reforming methanol, natural gas and gasoline) and the oxidant (mainly oxygen or air) are uniformly distributed in the diversion trenches of the anode surface and the cathode surface; (2) the inlet and outlet of cooling fluid (such as water) and the flow guide channel uniformly distribute the cooling fluid into the cooling channels in each battery pack, and the heat generated by the electrochemical exothermic reaction of hydrogen and oxygen in the fuel cell is absorbed and taken out of the battery pack for heat dissipation; (3) the outlets of the fuel gas and the oxidant gas and the corresponding flow guide channels can carry out liquid and vapor water generated in the fuel cell when the fuel gas and the oxidant gas are discharged. Typically, all fuel, oxidant, and cooling fluid inlets and outlets are provided in one or both end plates of the fuel cell stack.

The proton exchange membrane fuel cell can be used as a power system of vehicles, ships and other vehicles, and can also be used as a movable and fixed power generation device.

When the proton exchange membrane fuel cell is used as a vehicle power system, a ship power system or a mobile and fixed power station, the proton exchange membrane fuel cell must comprise a cell stack, a fuel hydrogen supply system, an air supply subsystem, a cooling and heat dissipation subsystem, an automatic control part and an electric energy output part.

Fig. 1 shows a typical fuel cell power generation system, in fig. 1, 1 is a fuel cell stack, 2 is a hydrogen storage bottle or other hydrogen storage device, 3 is a pressure reducing valve, 4 is an air filtering device, 5 is an air compressing device, 6 is a hydrogen water-vapor separator, 6' is an air water-vapor separator, 7 is a water tank, 8 is a cooling water circulating pump, 9 is a cooling water radiator, 10 is a hydrogen circulating pump, 11 is a hydrogen humidifying device, and 12 is an air humidifying device.

In a typical fuel cell power generation system at present, noise components are mainly an air compressor, a hydrogen circulation pump, and a cooling water circulation pump. In general, noise reduction measures are not taken for noise components such as an air compressor, a hydrogen circulation pump, and a cooling water circulation pump. Therefore, when the fuel cell power generation system operates as an engine-driven vehicle, the noise and vibration generated by these noise components are large, thereby reducing the riding comfort of passengers.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a low noise fuel cell power generation system for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme: a low-noise fuel cell power generation system comprises a fuel cell stack, a hydrogen storage device, a hydrogen pressure reducing valve, a hydrogen humidifying device, a hydrogen water-vapor separator, a hydrogen circulating pump, a water tank, a cooling water circulating pump, a cooling water radiator, an air filtering device, an air compressing device and an air humidifying device, and is characterized in that the air compressing device, the hydrogen circulating pump or the cooling water circulating pump are packaged by a noise-proof, noise-absorbing or sound-insulating material and are enclosed in the noise-proof, noise-absorbing or sound-insulating material.

The noise insulation, absorption or isolation material comprises cork, polyurethane foam or sponge material.

The noise insulation, absorption or isolation material is an environment-friendly and flame-retardant material.

After the air compression device, the hydrogen circulating pump or the cooling water circulating pump are packaged, only the fixed feet and the fluid inlets and outlets of the three components are reserved.

The air compression device is an air blower or an air compressor.

Compared with the prior art, the utility model discloses a noise control, inhale the main noise component of making an uproar or sound insulation material encapsulation fuel cell power generation system have reduced vibrations and noise that noise component arouses, when this fuel cell power generation system moves as engine drive car, can improve the travelling comfort that the passenger took greatly.

Drawings

FIG. 1 is a typical current fuel cell power generation system;

fig. 2 is a schematic structural view of a low noise fuel cell power generation system according to the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in figure 2 and combined with figure 1, a 1-200 KW low-noise fuel cell power generation system comprises a fuel cell stack 1, a hydrogen storage device 2, a hydrogen pressure reducing valve 3, a hydrogen humidifying device 11, an air filtering device 4, a high-pressure air blower or air compressor 5, an air humidifying device 12, a hydrogen water-steam separator 6, a hydrogen circulating pump 10, an air water-steam separator 6', a water tank 7, a cooling water circulating pump 8 and a radiator 9, wherein the high-pressure air blower or air compressor 5, the hydrogen circulating pump 10 or the cooling water circulating pump 8 are packaged by a noise-proof, noise-absorbing or sound-insulating material 103 and are enclosed in the noise-proof, noise-absorbing or sound-insulating material 103, and only a fixing pin 104, an air blower or air compressor inlet 51, an air blower or air compressor outlet 52, a hydrogen circulating pump inlet 101, a hydrogen circulating pump inlet 51, a hydrogen pump, A hydrogen circulation pump outlet 102, a cooling water circulation pump inlet 81, and a cooling water circulation pump inlet 82. The noise insulation, absorption or insulation material 103 is selected from cork, polyurethane foam or sponge material, and the noise insulation, absorption or insulation material 103 is made of environment-friendly and flame-retardant material.

Claims

1. A low-noise fuel cell power generation system comprises a fuel cell stack, a hydrogen storage device, a hydrogen pressure reducing valve, a hydrogen humidifying device, a hydrogen water-vapor separator, a hydrogen circulating pump, a water tank, a cooling water circulating pump, a cooling water radiator, an air filtering device, an air compressing device and an air humidifying device, and is characterized in that the air compressing device, the hydrogen circulating pump or the cooling water circulating pump are packaged by a noise-proof, noise-absorbing or sound-insulating material and are enclosed in the noise-proof, noise-absorbing or sound-insulating material.

2. A low noise fuel cell power generation system according to claim 1, wherein the air compressor, the hydrogen circulation pump or the cooling water circulation pump are packaged to leave only the fixing legs and the fluid inlets and outlets of the three components.

3. A low noise fuel cell power generation system according to claim 1 or 2, wherein said air compressing means is an air blower or an air compressor.