5 Electricity and Magnetism 5.2 Capacitance, Dielectrics, Electric Energy, Storage
P2411100
Characteristic curve and efficiency of a PEM fuel cell and a PEM electrolyser
Volume of the hydrogen generated by the PEM electrolyser as a function of time at different current I.
Principle In a PEM electrolyser, the electrolyte consists of a proton-conducting membrane and water (PEM = Proton- Exchange-Membrane). When an electric voltage is applied, hydrogen and oxygen are formed. The PEM fuel cell generates electrical energy from hydrogen and oxygen. The electrical properties of the electrolyser and the fuel cell are investigated by recording a current-voltage characteristic line. To determine the efficiency, the gases are stored in small gasometers in order to be able to measure the quantities of the gases generated or consumed. Tasks 1. 2. 3. 4.
Recording the characteristic line of the PEM electrolyser. Recording the characteristic line of the PEM fuel cell. Determination of the efficiency of the PEM electrolysis unit. Determination of the efficiency of the PEM fuel cell.
Cobra4 Sensor-Unit Weather: Humidity, Air pressure,Temperature, Light intensity, Altitude Gas bar Digital multimeter 2010 Connection box
12670-00 40466-00 07128-00 06030-23
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Cobra4 Sensor-Unit Weather: Humidity, Air pressure,Temperature, Light intensity, Altitude
What you can learn about ▪ ▪ ▪ ▪ ▪
Electrolysis Electrode polarisation Decomposition voltage Galvanic elements Faraday's law
Main articles Power supply, universal PEM electrolyser Cobra4 Mobile-Link set, incl. rechargeable batteries, SD memory card, USB cable and software "measure" PEM fuel cell
13500-93 06748-00
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12620-55 06747-00
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excellence in science 116
Function and Applications Depending on application type, the Cobra4 Sensor-Unit Weather can be connected to the Cobra4 Wireless-Link, the Cobra4 MobileLink, the Cobra4 USB-Link oder the Cobra4 Junior-Link using a secure and reliable plug-in/ lockable connection. 12670-00