The performance of a power plant unit is strongly influenced by various aspects, one of which is very determined by how the combustion process occurs in the combustion chamber, because it can affect the efficiency of the power plant itself, especially in the efficiency aspects of the boiler combustion process. To find out the efficient operation of the boiler, the operator as the holder of the power plant must understand what the combustion process is like in it. Good combustion will always require the right combination of fuel and air (oxygen). From the results of the research that has been done, it can be seen that if the actual amount of air flow needed for the combustion process is closer to the ideal air flow value it will indirectly increase the combustion efficiency value of the boiler.
Composites with BQTN 157-EX polyester matrix Yukalac reinforced with bambusablumeanafiber and glass fiber are used to find the right reinforcement composition. For natural fibers that are used to get special treatment, namely the separation of fibers by alkaline immersion process. The mixing process of the 2%, 2.5% and 3% reinforcement volume fraction was used for ASTM D638M-84 tensile testing variations. The maximum tensile strength is obtained in the bamboo powder and glass fiber fraction with a length of 5 mm with a value of 53.581 MPa. Void observations in the form of bubbles were carried out by quantitative metallographic analysis of ASTM E112-10 standards. The result of macroscopic enlargement, most voids in the volume fraction of reinforcement 3% of bamboo fiberhaur and glass 5 mm long an average of 9 point grid. The greater the volume volume fraction of the mixed bamboo and fiberglass, increasing the likelihood of voids occurring.
Bahan bakar briket sudah banyak diteliti dan dikembangkan sebagai pengganti bahan bakar padat seperti kayu. Salah satunya briket terbuat dari biomassa yang sudah tidak terpakai seperti serbuk gergaji, sekam padi bahkan limbah sisa industri. Pada penelitian ini peneliti tertarik untuk mengetahui karakteristik pembakaran briket yang terbuat dari sekam padi dicampur limbah arang kayu alaban yang meliputi penyalaan awal, laju pembakaran dan temperatur pembakaran. Adapun sampel briket yang digunakan dengan memvariasikan berupa bentuk segi empat dan enam, mesh 20 dan mesh 40 dan tekanan cetak briket sebesar 50 kg/cm2 dan 100 kg/cm2. Hasil menunjukkan temperatur tertinggi dimiliki briket segi empat dengan mesh 40 dan kekuatan tekan 50 kg/cm2 sebesar 4120C dan yang terendah dimiliki briket segi empat dengan mesh 20 dengan kekuatan tekan 100 kg/cm2 sebesar 333,330C. Semakin rendah tekanan pencetakan penyalaan awal semakin cepat dan laju pembakaran lebih lama karena ada rongga udara dan tingginya tekanan pencetakan mempengaruhi lamanya proses pembakaran.
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