• Energy Research

Konsumsi energi listrik di Aceh semakin meningkat dari tahun ke tahun.Faktor yang menyebabkan meningkatnya konsumsi energi listrik di Aceh adalah Pertumbuhan Penduduk, dan Ekonomi. Untuk memenuhi akan kebutuhan konsumsi energi listrik yang semakin meningkat dari tahun ke tahun, maka dilakukan perkirakan konsumsi energi listrik jangka panjang selama 10 tahun yaitu pada tahun 2028 di Aceh. Untuk memperkirakan konsumsi energi listrik ini memerlukan sebuah metode yang dapat mendekati hasil aslinya.Metode tersebut yaitu Metode Adaptive Neuro Fuzzy Inference System. Hasil yang didapat dalam memperkirakan konsumsi energi listrik pada tahun 2028 di Aceh dengan menggunakan metode ini adalah sebesar 5578,02 GWh atau dengan kenaikan 2,07% setiap tahunnya sampai tahun 2028.

The reduction of electrical energy consumption in buildings is a subject of great interest in the international scientific community. In buildings with a lot of available natural light, designed with large glazed surfaces, the artificial lighting system is often oversized and cannot be divided into segments to meet lighting demands during daylight hours. This article presents an experimental study, conducted in a university lecture hall that has a glazed surface covering the whole wall at one end, which provides a level of internal illumination that is only sufficient for the area next to the window itself, even when the outside lighting conditions are very bright. It is therefore necessary to turn on the artificial lighting system. The mathematical approach used in this paper has been successfully applied by the authors in other fields of science [1-2]. Using an automatic dimmer system, the calibration of which is based on experimental measurements, the lighting is arranged in such a way as to illuminate the most disadvantaged areas of the room, and then to extend itself gradually to the whole of the room, over the period of time that the lecture hall is in use.

Abstract The electrical energy consumption of battery-operated screwdrivers, which are widely used in many industries, e.g. automotive, heavy, chemical, etc., can be considerably reduced. This would allow increasing the service life of a battery and reducing the time of its charging, thus increasing the productivity and decreasing the prime cost of this battery. It is shown that up to 17.9% of electrical energy could be saved at assembling fixed threaded joints by removing power from the screwdriver immediately after reaching the required tightening torque.

W artykule przedstawiono metody pomiaru zużycia paliwa i energii elektrycznej stosowane w badaniach taboru kolejowego, autobusów, trolejbusów oraz tramwajów. Na podstawie zebranych doświadczeń opisano ograniczenia stosowanych obecnie metod badawczych i wskazano możliwe rozwiązania.

Das erstmals auf der DGF-Tagung von Oktober 1975 in Hamburg vorgestellte TTK-System wurde inzwischen vielfach angewendet. Bisherige Nachteile des relative hohen elektrischen Energieverbrauchs waren der Anlas, das System weiterzuentwickeln. Beim Betrieb der ersten Apparate wurde herausgefunden, das nicht nur der elektrische Energieverbrauch, sondern auch der Dampfverbrauch gesenkt werden konnte, und daruber hinaus wurde die Erfahrung gemacht, das die Entbenzinierung der Extraktionsschrote uberraschend niedrigere Restbenzingehalte aufweist. In Verbindung mit einer entsprechenden Vorentbenzinierung kann der elektrische Energieverbrauch der Trocknungs- und Kuhlungsstufen ebenfalls betrachtlich gesenkt werden, und es ist auserdem unter bestimmten Voraussetzungen moglich, fur die Trocknung des Schrotes ohne Dampf auszukommen. Report about Further Details of the TTK-System The TTK-system, first presented in Hamburg during the DGF-meeting in October 1975, has often been applied in the meantime. Previous disadvantages of the relatively high electrical energy consumption were the reason to continue the development of the system. During operation of the first plants it was found out that not only the electrical energy consumption, but also the steam consumption could be lowered, and beyond it was ascertained that the removal of benzine from the extracted seed shows surprisingly lower contents of residual benzine. In connection with an appropriate preremoval of benzine the electrical energy consumption of the drying and cooling steps can significantly be lowered, too, and besides, it is possible under certain conditions to do the drying of the extracted seed without steam.