Portal Jurnal Politeknik Negeri Semarang
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Studi Eksperimen Variasi Laju Aliran Pendinginan dan Pelapisan Kaca Film pada Panel Surya Bersistem Tubular Cooler
Get PDFPanel surya dapat mengubah energi matahari menjadi listrik, Penggunaan panel surya masih memiliki kendala, salah satunya adalah efisiensi daya keluaran yang masih rendah. Salah satu cara untuk meningkatkan efisiensi daya keluaran panel surya adalah dengan mengatur temperatur panel surya. Temperatur panel surya yang terlalu tinggi akan mengurangi efisiensi panel surya, sehingga diperlukan sistem pendinginan untuk menjaga temperatur panel surya tetap pada temperatur yang optimal. Variasi laju aliran pada tubular cooler serta pelapisan kaca film digunakan pada penelitian ini. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh tubular cooler dan kaca film pada panel surya terhadap daya keluaran, efisiensi maupun temperatur yang dihasilkan. Metode penelitian yang digunakan adalah metode eksperimental dengan menggunakan sistem pendingin tubular cooler dan kaca film pada panel. Pengambilan data dilakukan selama 6 hari dikondisi luar lapangan. Tingkat kegelapan kaca film divariasikan dan membaginya menjadi dua kelompok penelitian. Pada penelitian pertama digunakan kaca film 0% dan variasi laju aliran 1,2 L/menit, 1,6 L/menit dan 2 L/menit. Pada kelompok penelitian kedua menggunakan kaca film 20% dan variasi laju aliran 1,2 L/menit, 1,6 L/menit dan 2 L/menit. Hasil penelitian pada kelompok pertama menunjukkan panel surya mengalami penurunan temperatur terbesar hingga 11,69%. Penuunan temperatur yang terjadi, menghasilkan peningkatan daya keluaran hingga mencapai 31,88% dibanding panel tanpa pendingin. Pada penelitian kelompok kedua, penggunaan kaca film 20% sangat efektif dalam menurunkan temperatur panel hingga 15,84%, tetapi mengalami penurunan daya keluaran. Penurunan ini disebabkan karena adanya pengurangan intensitas matahari yang diterima oleh panel
RESPON STRUKTUR BETON GEDUNG APARTEMEN DAN PERKANTORAN 20 LANTAI AKIBAT BEBAN GEMPA DENGAN MENGGUNAKAN METODE RESPON SPEKTRUM
Get PDFA 20-story building located in Bandung, with a height of 70.5 m, functions as both an office building and an apartment complex. As a high-rise structure, seismic analysis of the building is required to determine the seismic pattern using the response spectrum method. The response spectrum method is used to compare V-static with Vdynamic based on SNI 1726-2019, and to determine the structural performance of the 20-story building frame. The results obtained for each frame using a combination of cases (static + seismic) show that, for displacement review, the highest shift occurs on the 20th floor at 1003.27 mm, and the highest drift value is on the 9th floor at 125.92 mm. The internal forces on the sample column show the highest results on the 5th-floor column C1 with 1.07x105 kN for Fx, 1.95x103 kN for Fy, and a moment of 5.44x103 kN-m, through the combination (static + seismic). Meanwhile, for the reviewed beam forces, the highest values are found on beam B53 on the 6th floor with an Fx value of 80.23 kN, Fy of 3140.53 kN, and the largest moment on the 15th-floor beam B53 of 793.46 kN-m
REDUKSI NILAI AKTIF MATERIAL GUNUNG DENGAN STABILISASI PADA TIMBUNAN PILIHAN PERKERASAN PERBUTIRAN JALAN RAYA
Get PDFThe use of selected embankment materials in highway pavement work must meet the technical requirements in accordance with the applicable specifications. One source of mountain material exploited by the general public to meet the needs of residential construction and contractors on government projects is Golo Lalong Village, East Manggarai Regency, NTT Province. From previous research it is known that the mountain material from the quarry is not suitable for selected embankment work on roads because its active value is > 1.25 which is categorized as active material. This research was carried out with the aim of stabilizing the mountain material of Golo Lalong Village with mountain material from Kisol to reduce its active value. With 15% stabilization of Ex Kisol mountain material it is able to reduce the plastic limit value from 9 to 13 to 3 and the percentage passing the Number 200 sieve varies from 5.16% to 6.87%. The active value of the material resulting from the stabilization was reduced significantly from 1.25 to 2.43 become 0.44 to 0.97 so that the Golo Lalong Village mountain material with 15% stabilization of the Ex Kisol mountain material is suitable for use as an embankment option for highway granular pavement
EVALUASI KEPUASAN KLIEN TERHADAP HASIL PRODUK KONTRUKSI (Studi Kasus: PT Isa Putra Konstruksi)
Get PDF1),A construction service company is a company engaged in the development sector in Indonesia. Construction contractor service business in the form of planning, design, cost calculation, bidding and construction implementation until completion. After all the work is completed, it will be handed over to the project owner or owner. The field of work for construction service companies is in the form of building construction, bridge construction, factory construction, industrial development and road construction. The aim of this study was to test and analyze the evaluation of the satisfaction and quality of service users at the construction company PT. Isa Putra Construction. The analytical method used in this research is a quantitative descriptive research type using Statistical Product and Service Solution (SPSS). The research was conducted at companies engaged in construction services, namely PT. Isa Putra Construction with a sample of 17 respondents. Based on the results of the calculations that have been done, the CSI value is 47%. This CSI value is obtained from the division between the total Weight Score (WS) value and the maximum scale used in this study, namely 5 and multiplying by 100%.Keywords: Satisfaction, Quality, Construction Services, Service User Satisfaction Constructio
KAJIAN FAKTOR-FAKTOR YANG MENDUKUNG DAN TIDAK MENDUKUNG PERLUASAN LAYANAN BUS RAPID TRANSIT (BRT) TRANS JATENG (Studi Kasus: Koridor 1 Bawen ”“ Tawang Rute Menjadi Salatiga ”“ Tawang)
Get PDFThe high public interest in the Semarang City, Semarang Regency, and Salatiga City areas towards the Trans Jateng BRT service has become the basis for the expansion of the Trans Jateng BRT service from corridor 1 Bawen-Tawang route to Salatiga-Tawang, which is much needed. Therefore, the aim of this research is to identify factors that support and oppose the expansion of the Trans Jateng BRT service from corridor 1 Bawen-Tawang route to Salatiga-Tawang and to find appropriate strategies to address the differences between supporting and opposing factors for the expansion of this service. This study employs a descriptive qualitative approach using the Delphi method and SWOT analysis. The research findings indicate that there are 24 factors supporting the expansion of the Trans Jateng BRT service, categorized into transportation infrastructure availability, community support, regional development plans, economic factors, government support, and the success of the Trans Jateng service. There are 15 factors opposing the expansion of the Trans Jateng BRT service, categorized into transportation infrastructure inadequacy, stakeholder disagreement, budget constraints and financial resources limitations, as well as low public awareness and education. The strategy to address the differences between supporting and opposing factors for the expansion of the Trans Jateng BRT service from corridor 1 Bawen-Tawang route to Salatiga-Tawang is the stable growth strategy
FACTORS AFFECTING TAX AGGRESSIVENESS IN COMPANIES LISTED ON THE INDONESIAN STOCK EXCHANGE
Get PDFThis research use quantitative research methods that examines the impact of board independence, gender diversity, managerial ownership, institutional ownership, and ownership concentration on tax aggressiveness. It also investigates how audit quality moderates the relationship between these variables and tax aggressiveness. The research, based on a purposive sample of 566 companies from audited financial reports on the Indonesia Stock Exchange (BEI) spanning 2018 to 2022, uses panel regression with EViews version 12. Findings indicate that board independence, gender diversity, and ownership concentration do not significantly affect tax aggressiveness, while managerial and institutional ownership have a noteworthy impact. Ineffective implementation of independent commissioners' roles, male dominance in management, and the lack of expected theoretical impact on overseeing management do not influence tax aggressiveness. The research also shows that audit quality as moderating variable does not significantly moderate the relationship between these variables and tax aggressiveness
PENDAMPINGAN LEGALITAS MELALUI OSS DAN DIGITAL MARKETING KOMUNITAS UMKM KELURAHAN MANGUNHARJO
Get PDFKegiatan usaha masyarakat di daerah khusunya UMKM telah banyak menberikan manfaat bagimasyarakat umum, akan tetapi kurangnya pendampingan terkait legalitas usaha bagi mereka membuatpengembangan usaha tidak berjalan sebagaimana mestinya, maka perlu adanya pendampingan untukmendapatkan legalitas izin usaha bagi UMKM yang merintis maupun mengembangkan usahanya diKelurahan Mangunharjo, program pengabdian berupa pendampingan dan pelatihan ini dengan peserta 10 orang Pelaku UMKM yang bergerak di berbagai bidang usaha seperti fashion, kuliner dan kerajinan diKelurahan Mangunharjo, Kota Semarang yang bertujuan meningkatkan kesadaran pelaku UMKM gunamengurus legalitas usaha, materi yang di sampaikan tentang Pelayanan Perizinan Berusaha TerintegrasiBerbasis Resiko secara Online Single Submission (OSS). Pelatihan Digital Marketing dalam hal iniadalah dengan cara integrasi dan kombinasi berbagai aplikasi online sosial media melalui pendaftaranpemilik secara legal untuk informasi lokasi bisnis, guna memperluas jangkauan pelanggan melaluistrategi pemasaran di Instagram bisnis, serta kemudahan dalam proses pemesanan dan komunikasi daripelanggan kepada pemilik bisnis
RANCANG BANGUN ALAT ROL STRIP PLAT MANUAL DENGAN PENEKAN ROLLER DONGKRAK HIDROLIK BERPENGUKUR TEKANAN
Get PDFPada saat merealisasi tugas akhir rancang bangunnya, seringkali mahasiswa Jurusan Teknik Mesin program studi D3 harus membuat komponen mesinnya yang berbentuk lingkaran penuh atau segmen lingkaran tertentu. Komponen rancang bangun tersebut seringkali terpaksa dibuat oleh pihak ketiga karena ketidaktersedian peralatan pengerol strip plat baja di Bengkel Pemesinan Politeknik Negeri Semarang. Dan ternyata oleh pihak ketiga pengerjaan pengerolan ini pun masih menggunakan cara manual dan tradisionalyang tidak menjamin keakuratan radius komponen mesin yang dibuat. Agar hasil pengerolan lebih presisi, maka perlu direalisasikan alat rol strip plat baja dengan penekan roller bertenaga hidrolik guna menunjang kegiatan praktek tersebut diatas. Metode penelitian yang dilakukan adalah: perencanaan mekanisme peralatan Roller Strip Plat Baja dengan Roller Press Bertenaga Hidrolik yang didasarkan pada studi literatur dan studi lapangan. Luaran dari hasil penelitian ini adalah 1 unit alat roller strip plat baja yang mampu menggelindingkan strip plat baja dengan tebal maksimal 8 mm dan radius rolling 100 mm sampai dengan 400 mm untuk strip plat baja tebal 4 mm dan 6 mm. tebal mm. Sedangkan untuk benda uji dengan ketebalan 8 mm, radius rollingnya berkisar antara 850 mm hingga 196 mm. Tekanan yang dapat diberikan oleh unit alat pengepres ini maksimal sebesar 450 kgf/cm2. Unit peralatan ini harus dapat dipindahkan dengan mudah sesuai dengan lokasi penggunaannya dan digunakan baja karbon medium S35C untuk struktur alat roller stripplat manual ini dengan tekanan roller hydraulic jack yang diukur tekanannya
PENYUSUNAN LAPORAN KEUANGAN DANA DESA KALONGAN KEC UNGARAN TIMUR, KAB SEMARANG
Get PDFThe main objective of this program is the implementation of village accounting in order to present village financial reports in accordance with SAP inKalongan Ungaran Timur Village. In the proposed community service activities for this year (2023), it was mutually agreed that problems should be prioritized in the following aspects: (1) How to prepare adequate village financial reports with SAP. (2) How to adjust the village financial report accounts based on Village government accounting standards. The methods used are as follows: (1) Program socialization and collaboration. (2) Village Accounting Training and synchronization of Village Financial Reports based on SAP standards. (3) Assistance in preparing village financial reports with SAP standards. The components of the SAP village financial report consist of: Trial Balance, Accountability Report for the Realization of Implementation of the Village APBD, Report on Village Owned Assets. After following the assistance of the Polines Community Service Team, the Village Apparatus will achieve the following targets: SAP standard Village Financial Reports can be presented, namely: Trial Balance, Accountability Report for the Realization of Implementation of the Village APBD, Report on Village Owned Wealth