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Method and characterisation The two aluminum plates hold together the fuel cell where the graphite (current collector) and the PTFE come between the aluminum plates. The PTFE plates act as an insulator in the fuel cell to avoid short circuit to occurring when voltage is produced. The PTFE plates hold the electric plates (heating element) which provide the fuel cell operating temperature. The graphite plates are hollowed with a channel to allow the reactant to flow through the graphite block. The cell active area was 20.25 cm2. The flow of the current was countercurrent flow to allow the reactant for maximum time of contact. On the top of the graphite plates are the electric terminals where it connected to measure the produced voltage. Probe Figure 3.14 Graphite plate channel in DMFC The thermocouple sensing point is on the side of the graphite plate to measure the set temperature. In this work, a K type thermocouple has a (3-inch) metal type probe (sensor) was used and connected to the temperature controller. The electrical circuit of the DMFC includes, Omron temperature controller TTI EX1810R, power supply 18V 10A, and fixed Wirewound Enamelled Corrugated tape resistors and multi-meter (Volt-Ohm meter) were used to drive the current in the circuit and to control the fuel cell operating temperature. The DC power supply provides a variable current through the fuel cell circuit. The current control was a logarithmic enabling low current level to be set accurately. Sirhan AL-Batty Page 92PDF Image | Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide
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