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All Journal Eksergi: Jurnal Teknik Energi
Hamim S, Ahmad
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Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

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KARAKTERISTIK TURBIN ULIR PADA ALIRAN AIR SUNGAI YANG MEMILIKI HEAD RENDAH SEBAGAI PEMBANGKIT TENAGA LISTRIK Suwoto, Gatot; Bono, Bono; Dewantoro H, Yusuf; Hamim S, Ahmad; Mahfudz, Yanuar
Eksergi Vol. 17 No. 3 (2021): SEPTEMBER 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1017.384 KB) | DOI: 10.32497/eksergi.v17i3.2983

Abstract

Turbin Ulir yang ada pada aliran air yang memiliki head Rendah Sebagai Pembangkit tenaga listrik ini bertujuan  untuk menghasilkan energy listrik yang memanfaatkan potensi sumber daya air pada aliran air dengan head rendah.Kontruksi turbin ulir memiliki sudu berdiameter 360 mm, 1 sudu-sudu, 8 daun sudu dengan panjang 1m dan memiliki diameter poros 80mm. yang dilengkapi dengan system transmisi untuk membangkitkan listrik. Pengujian dilakukan dengan variasi beban lampu disaat debit air dan kecepatan aliran air bernilai konstan. Parameter yang diukur dalam pengujian adalah debit air, putaran turbin (rpm), putaran generator (rpm), arus listrik (A), tegangan generator (V). Hasil dari pengujian turbin ulir ini didapatkan nilai efisiensi tertinggi pada debit 0,0462 , kecepatan aliran air 0,956, pada putaran turbin 169,3rpm dan daya listrik 3,2watt   yaitu 15,19%.
Evaluation Of Refrigerating Load And Air Flow Performance In Air Conditioning Unit at Hospital Z Aulia, Nur Fatowil; Hendrawati, Dwiana; Hanif, Muhammad; Mei H, Baktiyar; Hamim S, Ahmad; Sumarno, F. Gatot; Surindra, M. Denny
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4253

Abstract

This research was conducted to evaluate air conditioning systems in pharmaceutical warehouses against the ANSI/ASHRAE/ASHE ventilation standards 170 ”“ 2008 and SNI-03-6572-2001. The method used is to calculate the cooling load on the FCU (Fan Coil Unit) using the CLTD (Cooling Load Temperature Difference) method and calculate the External Static Pressure on the ducting system. The analysis is carried out by comparing the results of calculating the FCU requirements with the actual specifications that have been implemented. Furthermore, the measurement results of the existing room air condition are compared with the standards for pharmaceutical warehouse applications. The calculation results show that the pharmaceutical warehouse has a cooling load of 47,472.72 Btu/hr, and has an external static pressure of 123 Pa. While the selected FCU (Fan Coil Unit) has a capacity of 78,771 Btu/hr and a maximum external static pressure of 130 Pa with a rated airflow of 4000 m3/hr. After 9 years of use, it is known that the rated airflow has decreased by around 37% of the FCU capacity. Existing room air conditions obtained the extreme temperature and RH of 23.36 °C and 72%, respectively.
Co-Authors Aulia, Nur Fatowil Bono Bono Dewantoro H, Yusuf Dwiana Hendrawati F. Gatot Sumarno, F. Gatot Gatot Suwoto Mahfudz, Yanuar Mei H, Baktiyar Mochammad Denny Surindra Muhammad Hanif