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All Journal Metalurgi International Journal of Humanities Education and Social Sciences
Hadi Suwarno
Pusat Teknologi Bahan Bakar Nuklir (PTBBN), BATAN Kawasan Puspiptek-Serpong, Tangerang Selatan 15314, Banten
Humanities Economics, Econometrics & Finance Energy Languange, Linguistic, Communication & Media Social Sciences Other

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PERCOBAAN PENGISIAN-PENGELUARAN HIDROGEN SEBUAH TANGKI SIMPAN HIDROGEN PADAT[Research of Charging-Discharging Hydrogen of Solid Hyrogen Storage Tan] Suwarno, Hadi
Metalurgi Vol 27, No 1 (2012): Metalurgi Vol. 27 No. 1 April 2012
Publisher : Pusat Penelitian Metalurgi dan Material - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (484.659 KB) | DOI: 10.14203/metalurgi.v27i1.138

Abstract

 Menyimpan hidrogen dalam bentuk padat sebagai paduan metal hidrid merupakan metoda baru untuk keperluan bahan bakar kendaraan transportasi karena memiliki densitas yang lebih besar. Sebuah tangki simpan hidrogen dengan volume sekitar 1 liter berisi serbuk nano partikel Mg2Ti5Fe6 sekitar 700 gram telah dirakit menjadi satu kesatuan dan diuji unjuk kerjanya serta dibandingkan dengan tangki kosong bervolume yang sama. Pengisian dan pengeluaran hidrogen ke dalam/luar tangki dilakukan pada suhu kamar dengan tekanan bervariasi 2, 6,5, dan 8 bar. Dari hasil percobaan diperoleh bahwa rasio kapasitas serapan hidrogen tangki berisi serbuk nano partikel Mg2Ti5Fe6 terhadap tangki kosong berturut-turut 1,3, 2,3, dan 2,8. Percobaan serapan hidrogen pada tekanan lebih tinggi tidak dapat dilakukan karena keterbatasan sarana, namun apabila tekanan dalam tangki diperbesar, maka kapasitas serapan hidrogen masih akan bertambah. Dari penelitian ini ditunjukkan bahwa percobaan awal penyimpanan-pengeluaran hidrogen padat dari tangki telah berhasil baik. Penelitian lanjutan dalam bentuk pemanfaatannya di fuel cell sedang direncanakan. Abstract Storing hydrogen in the form of metal-hydride is one of the most promising fuels for transport vehicles because of its high gravimetric density. A solid hydrogen storage tank with the volume of tank about one liter containing about 700 g of nano powders Mg2Ti5Fe6 alloy has been fabricated for performing the hydrogen charging-discharging cycles. Charging-discharging of hydrogen into/out from the tank is conducted at room temperature at the varied pressure of 2, 6.5 and 8 bars. It is exhibited that the ratio of hydrogen capacity of the tank containing Mg2Ti5Fe6 nano particle to the empty tank is 1.3, 2.3, and 2.8, respectively. Charging experiment at higher pressure could not be conducted due to the limit of facility. It is predicted that at higher pressure the hydrogen capacity of the tank will be increased. From the experimental results it is concluded that the preliminary study on charging-discharging solid state hydrogen has been done successfully. Further examination in the form of its application in the fuel cell is being scheduled.
Factor Contributing To Organizational Citizenship Behavior Andryansah, Galang; Suwarno, Hadi; Afrizal, Very
International Journal Of Humanities Education and Social Sciences (IJHESS) Vol 4 No 1 (2024): IJHESS AUGUST 2024
Publisher : CV. AFDIFAL MAJU BERKAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55227/ijhess.v4i1.1054

Abstract

This study explores the interplay between organizational culture and servant leadership and their collective impact on organizational citizenship behavior (OCB). The purpose of this research is to ascertain and analyze how organizational culture and servant leadership affect organizational citizenship behavior at PT. Surya Furniture Indonesia. There is a quantitative study type that is conducted. Furthermore, using associative techniques to determine the ways in which Organizational Culture and Servant Leadership impact Organizational Citizenship Behavior. There were seventy-three subjects in this investigation, and nonprobability sampling with saturated sample techniques was used to identify the samples. In line with the respondent company, PT. Surya Furniture Indonesia. Instruments employ a Likert scale. To find out how much organizational culture and servant leadership influence organizational citizenship behavior, a multiple regression analysis was carried out with SPSS 26.0. Organizational Culture was found to have a substantial beneficial impact on Organizational Citizenship Behavior (p=0.032, t=2,190). Servant leadership significantly improves organizational citizenship behavior (p-value = 0.000, t-count = 27688). Organizational culture and servant leadership both demonstrated a strong positive impact on organizational citizenship behavior, with a p-value of 0.000 and an f-count of 378,058. The findings suggest that a positive organizational culture significantly enhances the effectiveness of servant leadership practices, which in turn, fosters higher levels of OCB among employees.
Co-Authors Afrizal, Very Andryansah, Galang