Proses pengecatan merupakan proses pelapisan dengan tujuan melindungi dan esetika dari produk yang dilapisi. Agar didapatkan permukaan hasil pengecatan yang bagus diperlukan kondisi permukaan yang bagus pula. Kondisi permukaan yang ada sedikit cacat akan tertutupi bila ketebalan lapisan cat yang menempel pada produk cukup tebal. Ketebalan lapisan cat ditentukan oleh jarak penyemprotan, kecepatan langkah ayun, tekanan spray gun dan tekanan tabung residu. Campuran bahan cat dengan pengencer juga berpengaruh pada ketebalan lapisan namun setiap produsen bahan cat telah memberikan rekomendsi perbandingan campuran yang terbaik. Peneliti menentukan jarak penyemprotan 100;150;200 mm, kecepatan langkah ayun 0,381;0,448 m/s, tekanan spray gun 10;12 Psi dan tekanan tabung residu 25;20 Psi. Menggunakan thickness gauge didapatkan ketebalan cat sebesar 0,1 mm pada jarak penyemprotan 100 mm, kecepatan langkah ayun 0,381 m/s, tekanan spray gun 12 Psi dan tekanan tabung residu 20 Psi.
ABSTRAKProgram Studi (prodi) DIII Teknik Mesin adalah salah satu prodi di Jurusan Teknik Mesin Universitas Negeri Surabaya (Unesa) yang memiliki penjurusan otomotif dan produksi. Jumlah mahasiswa yang masuk di prodi ini setiap tahun berkisar 70 orang dan mereka dibagi dalam dua kelas. Pada akhir semester empat, mereka akan dibagi menjadi dua penjurusan seperti di atas berdasarkan kemampuan akademik dan minat masing-masing mahasiswa. Jumlah dosen tetap yang mengajar dalam prodi ini adalah 10 orang dengan bidang keahlian otomotif, produksi, konversi energi dan sistem manufaktur. Jumlah ini telah memenuhi standar minimal jumlah dosen dalam satu prodi yaitu enam orang. Dari hasil Laporan Kinerja Dosen (LKD) pada periode empat tahun ini didapatkan hasil bahwa Beban Kinerja Dosen (BKD) mengalami kelebihan di atas ketentuan standar BKD yang minimalnya 12 sks (sistem kredit semester) dan maksimalnya 16 sks. Dari ketiga unsur tri dharma yang dinilai yaitu pengajaran, penelitian dan pengabdian masyarakat, ada kenaikan berbeda di setiap unsurnya yang dialami oleh masing-masing dosen sehingga memengaruhi total sks yang diizinkan oleh BKD standar setiap semesternya. Dari hasil yang telah didapatkan, LKD masing-masing dosen mengalami kenaikan di atas rata-rata 12 SKS namun masih terhitung normal. Juga nampak distribusi dosen pada masing-masing prodi kurang merata atau masih banyak dosen mengajar pada prodi yang bukan home base-nya. Sehingga hasil analisis sementara dapat ditarik kesimpulan bahwa masih diperlukan tambahan dosen baru yang berkonsentrasi pada salah satu prodi yang ada di jurusan. Kata Kunci: BKD, LKD, otomotif, produksi, sks. ABSTRACTDIII Mechanical Engineering study program is one of study programs in Mechanical Engineering Department, State University of Surabaya (Unesa) that has automotive and production majors. The number of students who enter in this program are around 70 students per year and they have been divided into two groups. In the end of fourth semester, they will be divided into the majors above which is based on their academic abilities and interests. The number of lecturers who lectured in this program are 10 peoples with the areas of expertise are automotive, production, energy conversion and manufacturing systems. These numbers have been fulfilled minimal numbers of lecturer in a study program that are six peoples. Based on Lecturer Performance Report (LKD) in this four years period, it is obtained that Lecturers Performance Burden (BKD) have increase above BKD provision that has 12 sks (credit transfer system) minimum and 16 sks maximum. From the three elements of Tridharma, that are education, research and community services, there had different increasing in each element that had experienced by each lecturer as of influencing total sks which are allowed by BKD provision per semester. From the results which have been obtained, the LKD on each lecturer goes up on the above 12 sks average but it is still normal. Also it seem that lecturer distribution in each study program did not equal or many lecturers gave lecturing at study program that it is not their home base. Finally the whilst result that can be attracted is the department still needs new lecturer that focus in one of the study programs in the department. Keywords: automotive, BKD, LKD, production, sks.
In this paper, thermal performance analysis of 4 m2 solar dish collector is presented.The focal image characteristics of the solar dish are determined to propose the suitable design of a receiver. A flat plate was used for the receiver to measure flux distribution in the focal region. The measurement had been done in the midday. Intercept factor based on this distribution had been calculated and was obtained to calculate thermal efficiency after total heat loss was described. From the experiment, total heat loss was formed by conductive and radiative in the receiver. The results showed that the increase in total heat loss followed the increase in receiver temperature and it caused a decrease in thermal efficiency. On the peak of the measurement or in midday, receiver temperature can achieve 138°C and it gave around 1200-Watt heat loss and it was dominated by radiative heat loss for around 80%. The thermal efficiency of the system due to flux distribution measurement in the focal region was above 70% and it was classified as high average but we needed to cover this flux up so it did not lose a lot of heat. Cavity aperture would keep around 20% total heat loss and it minimized radiative heat loss from the flux. The design of cavity aperture was the next discussion to insulate thermal heat reflection of the parabolic dish system from high radiative heat loss.©2020. CBIORE-IJRED. All rights reserved
Kurikulum yang diterapkan program studi S1 Teknik Mesin Unesa adalah kurikulum merdeka belajar dengan berfokus pada luaran atau Outcome Based Education (OBE). Karena berdasar luaran, maka luaran berupa pengetahuan (knowledge) dan keahlian (skill) harus dapat diukur (concretely measurable). Untuk mendapatkan hasil pengukuran yang baik diperlukan model evaluasi yang sesuai. Tujuan pada penelitian ini yaitu menemukan model evaluasi pembelajaran dengan basis OBE yang sesuai untuk diterapkan pada program studi S1 Teknik Mesin Unesa. Jenis dari penelitian yaitu kualitatif yang menggunakan metode FGD atau Focus Group Discussion sebagai metode pengumpulan datanya. Luaran dari hasil penelitian ini adalah metode evaluasi pembelajaran berbasis OBE. Capaian pembelajaran lulusan atau program learning otcome (PLO) Program Studi S1 Teknik Mesin Unesa dibuat mengikuti standar yang telah ditentukan oleh Badan Kerjasama Teknik Mesin (BKSTM), lembaga akreditasi, dan dapat memenuhi tujuan program studi (PEO). PLO program studi S1 Teknik Mesin Unesa berjumlah 10 poin yang mencakup kompetensi pengetahuan dan keterampilan. Model evaluasi pembelajaran mengukur ketercapaian PLO oleh matakuliah dengan pembagian kriteria excellent, very good, good, very satisfy, satisfy, fair, poor, very poor, fail. Kata kunci: Outcome Based Education, evaluasi, pembelajaran.
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