Temperatur udara ambient berpengaruh pada performa turbin gas. Temperatur yang tinggi mengakibatkan masa jenis udara menjadi rendah sehingga pada laju aliran udara masuk kompresor lebih sedikit. Teknologi untuk memitigasi permasalahan ini adalah penggunaan Turbine Inlet Air Cooling (TIAC) pada inlet air system turbin gas. Penelitian ini bertujuan untuk mendesain air cooler dengan tipe staggered continous finned tube compact heat exchanger pada turbin gas Lm6000 milik PT.X di Karawang. Proses perancangan air cooler dilakukan dengan menggunakan perhitungan Kern. Data yang dibutuhkan dalam penelitian ini adalah data dimensi maksimum air cooler, data temperatur air pendingin, data pengoperasi turbin gas dan data bahan bakar yang diambil sebelum dan sesudah pemasangan TIAC menggunakan beban turbin gas yang sama yaitu 22 MW. Hasil yang didapat dari proses perancangan air cooler adalah desain air cooler dengan 187 tube bundle dan nilai koefisien konveksi keseluruhan sebesar 35,4 W/m²°C. Analisis performa turbin gas menunjukkan bahwa temperatur inlet low pressure compressor mengalami penurunan rata-rata sebesar 3,5°C, sementara efisiensi siklus rata-rata meningkat sebesar 1,65%. Adapun peningkatan daya bersih rata-rata sebesar 0,496 MW karenanya dapat menghasilkan penghematan biaya bahan bakar sebesar Rp1.554.257.011 per tahun.
A braking system is an essential value in a vehicle particularly for a safety precaution. The higher number rate of traffic accidents mostly in Indonesia shows that the dominant cause of accidents is due to the human factor. The physical condition such as tired or sleepy during driving is the primary problem according to the survey. In order to assist a person when driving a vehicle, an artificial intelligence method is necessary to be integrated to ensure the safety of surrounding people inside and outside the vehicle. This study focuses on implementing the method of identifying object and distance to provide an indicator for braking action. Images from a stereo camera is processed by a neural network technique via a mini computer to classify as well as the distance of objects. Furthermore, selection of priorities are done to obtain the intensity of braking action. The result shows that process of classification and measurement requires period around 200 ms. Furthermore, braking action done by fuzzy controller sub-system shows that the intensity has smoother signal with the object distance variation compare to the direct method. Objects are firstly identified by the presence of a stereo camera, later on the decision of braking intensity is generated by two processing unit namely conventional and fuzzy unit. This is achieved by processing the data saved from the object detection using two system via MATLAB software. The object identification result, distance measurement and the period of object detection is presented. Moreover, the response of braking intensity using data is processed with both conventional and fuzzy unit systems are also presented. he implementation of this study is for the heavy vehicle such buses or trucks that requires higher safety during the journey.
In this research, it was explained about the conversion carried out by changing conventional vehicles fueled by gasoline with electricity. Replacement is carried out by removing the drive Engine and replacing it with a drive motor that is automatically added with batteries as an energy source.Furthermore, from the results of the conversion, torque and rpm testing was carried out through Dynotest, which is a method of testing the performance of vehicle engines (electric motors) by looking at power (power) and torque (torque). Torque is the ability of the engine to move or move an electric vehicle from a stationary state to running and when running there is a variation between speed and the gear change made. In addition, with Dynotest, the highest point of torque value on each gear will be known. In the tests carried out, the value of gear changes obtained from gear-1 max speed 20 km / h, gear-2 max speed 40 km / h, gear-3 max speed 60 km / h and gear-4 max speed 80 km / h. In this electric vehicle, measurements on amperes and voltages are carried out to observe the performance of the motor and battery as the main components and obtain a surge value at each gear change. The surge occurred as a result of a combination of alternating gas, brake and clutch footings to obtain a comfortable accelerant value.
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