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EXPERIMENTAL STUDY OF THE ABSORBTION AIR CONDITIONING SYSTEM OF LITHIUM BROMIDE Hariadi Hariadi
Jurnal Teknik Mesin (JTM) Vol 2, No 2 (2012)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (94.629 KB)

Abstract

The optimum performance of air conditioning system has been studied. The air conditioning system consists of a generator, a condenser, a evaporator, an absorber, pump and piping. The design and the analysis of the system is touse electrical heater for heating in the generator which has been designed, fabricated, and tested. LiBr-H2O in the generator vaporises. The high temperature and pressure vapor is passed to the condenser, and the vapor changes to be liqiud, and then passed to the evaporator to provide the cooling. In the absorber, the strong solution absorbs the water vapor leaving the evaporator to form the weak solution which is re-circulated back to the generator. The experimental equipment was tested at the generator temperatur of 60oC, 70oC, and 80oC. The data logger was uded to measure the temperature of absorber, the condenser, and the generator. The high Coefficient of Performance COP of 0.67 is obtained from the LiBr solution the concentration of 40% with the pump flow rate of 0.03 kg/s. The lowest temperature of the evaporator achieved was 19.43oC, which can be used in the internal air conditioning, while the ambient temperature 29oC. The study has shown that a simple equition was abtained (Y1=0.0016 X1+0.2188) for designed generator, where Y1 = achieved vapor volume in the generator is divided with generator volume, X1 is concentration of the LiBr solution and 0.2118 is a constant.
ANALISIS PERBANDINGAN UNJUK KERJA TURBIN PLTA BATANG AGAM TERHADAP KONDISI PADA SAAT KOMISIONING Hariadi Hariadi; Muchlisinalahuddin Muchlisinalahuddin; Mira Meilisa
Rang Teknik Journal Vol 4, No 2 (2021): Vol. 4 No. 2 Juni 2021
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v4i2.2667

Abstract

The Batang Agam Hydroelectric Power Plant is the oldest Hydroelectric Power Plant in West Sumatera, which is located in the district of Lima Puluh Kota. The Hydroelectric Power Plant started operating in 1976 with a Nett power is 10.5 MW. In its operation so far the turbine of the Batang Agam Hydroelectric Power Plant decrease in the performance compared to the initial commissioning. The impact of decreasing turbine efficiency of Batang Agam Hydroelectric Power Plant lead use of water to convert its energy electricity be wasteful. Therefore it is necessary to research so that the turbine can effectively use the river water that has been dammed in the Kolam Tando more efficient. From the results of analysis obtained the conclusion that the efficiency of the turbine Batang Agam Hydroelectric Power Plant at 3.5 MW from the highest to the lowest; Unit 1 with 86.7% efficiency, Unit 3 with 83.9% efficiency and Unit 2 with 79.2% efficiency. Compared with commissioning data unit-units in the turbine of Batang Agam Hydroelectric Power Plant has decreased efficiency of the amount; Unit 1 of 0.32%, Unit 2 of 7.80% and Unit 3 is 3.05%.
PERBANDINGAN EKSPERIMEN DEFLEKSI BATANG KANTILEVER BERPROFIL STRIP TERHADAP PERSAMAAN TEORITIS UNTUK BAHAN Fe DAN Al Nefli Yusuf; Hariadi Hariadi; Arief Septian Agung Tawar
Rang Teknik Journal Vol 3, No 1 (2020): Vol. 3 No. 1 Januari 2020
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v3i1.1704

Abstract

Pemahaman psikomotorik dengan melihat kondisi nyata di laboratorium menjadikan pengalaman yang berkesan, serta membangkitkan minat untuk lebih mendalaminya. Pada penelitian ini dilakukan pembuatan dan pengujian praktikum fenomena lendutan batang karena dibutuhkan oleh prodi Teknik Mesin, dalam kehidupan sehari-hari banyak bahan teknik yang dibuat dari bahan yang elastis. Pengujian dilakukan untuk batang kantilever berupa spesimen berprofil strip yang dijepit di satu ujung serta beri beban pada titik ujung lainnya secara bertahap. Linieritas kekakuan batang diperiksa dengan menempatkan beban pada penjang batang 200, 300, 400, dan 435 mm. Hasil penelitian menunjukkan bahwa besi SS400 lebih kaku dari Aluminium alloy 5052, sesuai dengan tabel elastisitas bahan. Dipihak lain kekakuan untuk besi linier sepanjang batang sedangkan Aluminium non linier.