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All Journal Jurnal Ilmiah Teknologi dan Rekayasa ENGINEERING INTEKNA
Chandrasa Soekardi
Universitas Mercu Buana
Automotive Engineering Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Other

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ANALISIS KINERJA ALAT SUPERHEATER PADA INSTALASI PEMBANGKIT TENAGA UAP Sugiarto, Tris; Soekardi, Chandrasa
ENGINEERING Vol 4, No 1 (2012)
Publisher : ENGINEERING

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Abstract

This paper presents the performance characteristic of a superheater of boiler power plant evaluated by measuring the working parameters such as pressure, temperature, steam flowrate, and gas temperatures flowing through the equipment as a function of time during 12 months of operation with the aim of providing data on the influence of fouling on superheater performance. These data were used to calculate the change of heat transfer rate with time as fouling deposition progressed. The results showed that after 12 months of operation the heat transfer rate declined by 28% below the initial condition. This condition is probably due to more severe fouling in the equipment. The gas flow rate must be reduced below its design value in order to maintain the design heat duty when the equipment is first placed in service. Thus the equipment will have to be taken out for cleaning at an undesirable time. To avoid these conditions it seems interesting to apply the rational design method providing available information of time dependence of fouling thermal resistance.Keywords : boiler, superheater, maintenance, cleaning interval, fouling, heat load, fouling thermal resistance
PERANCANGAN DAN PREDIKSI PERFORMANCE SEBUAH ALAT KONDENSOR INSTALASI PROSES PEMBUATAN ES BALOK ., Darmansyah; Soekardi, Chandrasa
INTEKNA Vol 12, No 2 (2012)
Publisher : Politeknik Negeri Banjarmasin

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Abstract

The energy consumption of a compression refrigeration system depends the ability of the condenser to release heat. Improved condenser design can make a significant contribu-tion to increase the heat removal in the condenser that in turn reduces the energy con-sumption. This paper presents, firstly the optimization design of a condenser with the objective to estimate the minimum dimension required for a given heat duty, and se-condly the prediction of the condenser performance when it is first placed in service. Vari-ous design variables such as tube diameter, pitch ratio, tube layout, and fouling factor are considered. Simultance optimization of these variables was tried and 9 design configu-rations have been experimented. The effect of the design variables and its constraints on the number of tubes required for the condenser are discussed. The results showed that the design conditions that give the minimum number of tube of 187 will be at tube diame-ter 1.5 inch, tube layout 30o, pitch ratio 1.25, and excess area 1.25.  The results of the performance calculations showed that when the condenser is first placed in service its performance is beyond the design conditions. The condenser performance will attain its design conditions when the fouling factor approachs the value that was selected at the design stage.
ANALISIS KINERJA ALAT SUPERHEATER PADA INSTALASI PEMBANGKIT TENAGA UAP Sugiarto, Tris; Soekardi, Chandrasa
ENGINEERING Vol 4, No 1 (2012)
Publisher : Universitas Pancasakti Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1135.204 KB)

Abstract

This paper presents the performance characteristic of a superheater of boiler power plant evaluated by measuring the working parameters such as pressure, temperature, steam flowrate, and gas temperatures flowing through the equipment as a function of time during 12 months of operation with the aim of providing data on the influence of fouling on superheater performance. These data were used to calculate the change of heat transfer rate with time as fouling deposition progressed. The results showed that after 12 months of operation the heat transfer rate declined by 28% below the initial condition. This condition is probably due to more severe fouling in the equipment. The gas flow rate must be reduced below its design value in order to maintain the design heat duty when the equipment is first placed in service. Thus the equipment will have to be taken out for cleaning at an undesirable time. To avoid these conditions it seems interesting to apply the rational design method providing available information of time dependence of fouling thermal resistance.Keywords : boiler, superheater, maintenance, cleaning interval, fouling, heat load, fouling thermal resistance
PERANCANGAN DAN PREDIKSI PERFORMANCE SEBUAH ALAT KONDENSOR INSTALASI PROSES PEMBUATAN ES BALOK ., Darmansyah; Soekardi, Chandrasa
INTEKNA informasi teknik dan niaga Vol 12 No 2 (2012)
Publisher : P3M Politeknik Negeri Banjarmasin

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Abstract

KARAKTERISTIK BEBAN TERMAL MESIN PENGKONDISIAN UDARA PADA RUANGAN PEMROSESAN BATERAI LITHIUM Budihadi, Agus; Soekardi, Chandrasa
Jurnal Ilmiah Teknologi dan Rekayasa Vol 24, No 1 (2019)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1009.848 KB) | DOI: 10.35760/tr.2019.v24i1.1935

Abstract

Karakteristik termal sirkulasi aliran udara dingin di dalam ruang pemrosesan baterai lithium pada sebuah industri yang berlokasi di Jakarta telah diteliti secara eksperimental. Mesin pengkondisian udara yang dipergunakan pada ruang tersebut sering beroperasi pada kondisi yang berbeda-beda, tanpa diketahui kondisi operasi mana yang paling optimal dalam hal konsumsi energinya. Serangkaian pengujian telah dilakukan dengan mengukur temperatur, kelembaban, dan laju aliran udara di dalam ruang pemrosesan baterai untuk memperoleh gambaran kondisi operasi yang terbaik. Hasil pengukuran dipergunakan untuk mengevaluasi beban termal pada mesin pengkondisian udara. Pengujian dilakukan pada tiga hari yang berbeda, masing-masing dengan kondisi operasi tertentu yang serupa dengan yangseperti yang biasa diterapkan sehari-hari pada mesin tersebut. Hasil rangkaian pengujian, dibandingkan dengan dua kondisi operasi lainnya yang menunjukkan bahwa mesin pengkondisian udara bekerja paling efisien sepanjang hari apabila dioperasikan pada kondisi di mana aliran udara suplai dari evaporator berada pada temperature 19 oC dan kelembaban 66 %, dengan kecepatan rata-rata 2 m/s. Konsumsi energinya paling tinggi terjadi apabila mesin dioperasikan pada kondisi di mana udara suplai temperaturnya 15 0 C dan kelembaban 53 %.
Co-Authors Bayu Yoga Prawira, Bayu Yoga Budihadi, Agus Darmansyah . Tris Sugiarto