摘要:
A method of managing air flow for a fuel cell power system comprising, providing air expelled from a compressor and providing air expelled from a humidification device. The method further includes mixing the air expelled from the compressor with the air expelled from the humidification device upstream of a fuel cell and supplying the mixture to a cathode of the fuel cell.
摘要:
According to the present invention, a temperature profile within a preferential oxidation reactor is controlled using a two phase water/steam system to provide a temperature range within the reactor (10) which favors the selective oxidation of CO in a hydrogen rich reformate stream. The reformate is flowed in a mixture with oxygen over a preferential oxidation catalyst (17). The temperature profile is controlled by flowing a stream of water proximate to the preferential oxidation catalyst (17) so as the stream of water and the reformate stream passing over the catalyst (17) are in a heat transfer arrangement. The stream of water is maintained as a two phase stream from a point at which the water reaches its boiling temperature to a point proximate an outlet from which the stream of water exits the reactor (10).
摘要:
A system for making and storing hydrogen comprises an IC engine, a thermal reactor to convert hydrocarbon fuels to reformate, and a separation means to separate the reformate into a hydrogen stream and a hydrogen depleted reformate stream. The hydrogen stream is compressed and stored. The hydrogen depleted reformate stream is split and sent to a thermal reactor and the IC engine. The IC engine drives the compressor for hydrogen as well as the compressor for the fuel inlet to the system. The described system and process achieves high efficiency in fuel conversion and hydrogen storage.
摘要:
A hydrocarbon fuel processing reactor for generating a hydrogen-enriched reformate from hydrocarbons is disclosed. A plurality of shells are arranged coaxially having a gap defined between each of the successive shells, thereby forming a plurality of coaxial zones. The shells are configured to permit heat transfer from one zone to another. Fluid streams for reactions within the reactor are preheated by heat transfer from adjacent zones.
摘要:
Perforated fins are provided to improve the capabilities of fin and tube type heat exchangers, and to adapt them for flow outside of the tube that is essentially parallel to the axis of the tube. The fins are made of a thermally conductive material, such as metal, with perforations in the fins. Fins can be of any shape. Typically, one or more tubes or binding posts pass through the fins. The fins are attached to the tube or post by press fitting, furnace or torch brazing, welding, or other method of mechanical bonding. The perforations allow heat exchange with the contents of a tube of a fluid flowing essentially parallel to the axis of the tube, in contrast to conventional fin-tube heat exchangers. The fins may also be bonded to a post or other securing means and inserted into the inside of a tube or other hollow body to improve efficiency of heat exchange. In addition, the fins may carry a catalyst, optionally carried on a washcoat or similar treatment to increase surface area.
摘要:
Check valves include a valve seat and a movable valve member, or piston. Movement of the piston is what allows fluid to either flow or be prevented from flowing. A magnetic check valve is provided that contains an annular piston, which is configured such that the fluid flows through a central aperture in the piston. Fuel cell systems include a cathode loop which is in contact with the proton exchange membrane (PEM). The PEM is sensitive to fowling by contaminants that may be present in the ambient air. The magnetic check valve apparatus disclosed herein prevents backflow of air through the exhaust side of the cathode loop. The valve is used on the inlet side of the cathode as well.
摘要:
An electrochemical cell includes a pair of bipolar plates and a membrane electrode assembly between the bipolar plates. The membrane electrode assembly comprises an anode compartment, a cathode compartment, and a proton exchange membrane disposed therebetween. The cell further includes a sealing surface formed in one of the pair of bipolar plates and a gasket located between the sealing surface and the proton exchange membrane. The gasket is configured to plastically deform to create a seal about one of the cathode compartment or the anode compartment. The sealing surface can include one or more protrusions.
摘要:
In accordance with one embodiment, a method of drying a hydrogen gas mixture is disclosed. The method may include determining a mass flow rate of water {dot over (m)}H2O in a hydrogen gas mixture stream and an adsorbent capacity of one or more adsorbent beds; determining a first period of time based on the determined mass flow rate of water {dot over (m)}H2O in the hydrogen gas mixture stream and the adsorbent capacity; directing the hydrogen gas mixture stream through a first adsorbent bed of the one or more adsorbent beds for the first period of time; adsorbing a quantity of water from the hydrogen gas mixture stream into the first adsorbent bed; and regenerating the first adsorbent bed.
摘要翻译:根据一个实施方案,公开了一种干燥氢气混合物的方法。 该方法可以包括确定氢气混合物流中的水(dot(m)} H 2 O的质量流率和一个或多个吸附剂床的吸附容量; 基于所确定的氢气混合物流中水(dot(m)} H 2 O的质量流量和吸附剂容量确定第一时间段; 将所述氢气混合物流引导通过所述一个或多个吸附剂床的第一吸附床第一时间段; 将一定量的水从所述氢气混合物流吸附到所述第一吸附床中; 并再生第一吸附床。