Pola semprotan pembuatan fuel cell

.......Air directors are used to produce air streams to shape and accelerate the ultrasonically produced spray. Two distinct spray patterns are produced with the directed air streams: narrow and wide. An air-shaping ring in the IFDS assembly is used for the narrow mode operation of the spray head. The air-shaping ring entrains the ultrasonically produced spray without mixing with it and produces a coating segment about 5 mm wide with well-defined edges from a distance of approximately 25 mm between the spray head tip and the substrate. An air director in the IFDS assembly is used to produce the wide mode. The air director impinges a jet of air on tip of the spray head opposite the liquid feed side. The resulting airflow entrains and expands the ultrasonically produced spray to produce a flat (rectilinear) pattern up to 5 times the width of the pattern produced in the narrow mode. The width of the spray pattern is proportional to the distance between the spray head tip and the substrate. The wide mode is optimal for the application of most of the suspensions used in the manufacture of fuel cells because it produces the thinnest possible coating. Since the spray is produced with ultrasonic energy rather than pressure and because a low velocity air stream is used only to shape the spray, the transfer efficiency is in the range of 95 to 99 percent. In other words, very little coating is wasted due to overspray. All process parameters for the ultraspray head with Integrated Fluid Delivery System are set electronically including liquid flow rate, air pressure, spray mode (wide or narrow), head height, and head speed. BACK

TEROBOSAN

Teknologi fuel cell masih relative baru dan belum dikenal luas di blantika science Indonesia saat ini. Pendekatan untuk memperkenalkan tehnologi ini perlu terusmenerus digencarkan sedemikian rupa sehingga dapat dimanfaatkan bagi kepentingan science ataupun kepentingan yang lebih luas lagi. Tahapan pemanfaatan ini merupakan hal terpenting dari keseluruahan agenda pengenalan tehnologi fuel cell itu. Adapun demikian, penguasaan akan tehnologi kekinian semacam fuel cell, haruslah dilakukan secara terus menerus dengan berbagai macam metode yang relevan dan sekaligus terjangkau dalam sumberdaya manusia maupun sumberdaya yang lainnya. Terobosan demi terobosan hendaknya dilakukan secara cerdas guna menghasilkan penguasaan yang efektif serta efisien. Titik awal dalam penguasaan teknologi terbarukan yang sangat efektif adalah alat peraga yang dipergunakan untuk simulasi, duplikasi, ataupun rekonstruksi tehnologi itu sendiri melalui sebuah metodologi penilitian yang akrab dipakai.

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