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The Development of Teaching Material Design for Automotive Electrical and Electronics Laboratorium Based on Automotive-SKKNI to Improve the Achievement of Standar Competencies of Polytechnic Students I Komang Rusmariadi; I Putu Darmawa; I Putu Sastra Negara; Ketut Bangse
Logic : Jurnal Rancang Bangun dan Teknologi Vol 20 No 2 (2020): July
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v20i2.1639

Abstract

This progress report contains about the achievement of the implementation of the program of research in the development of teaching materials in the form of an integrated jobsheet. The second stage of the development will be done in 2018 with the goal to find: 1) the evaluation result from the expert, lectures, and students, 2)the obstacles during the try out, and 3) the feasibility of the jobsheet draft as a lab teaching material. Research using Dick & Carey development model, in review and test the research involving 2 experts, 7 course lecturerss,and 24 students in mechanical engineering department. Data obtained using questionnaire enclosed and open questionnaire . Data were collected in the form of comments and suggestions as well as the evaluation result toward the integrated jobsheet were analyzed by descriptive qualitative and quantitative improvement. The test results stated: 1) the content expert test is very decent; design / media expert is very decent; individual very decent ; small group is very decent; and field testing of students and lecturer decent and very decent. 2) components that need to be revised from the entire contents of the test results and instructional design experts to field test were:The contents of the summary should be more material-oriented than the summary of jobsheet parts, in addition to trouble shooting ignition problems, it is necessary to add maintenance material that is preventive maintenance, assessment rubrics for evaluation /practical tasks need to be made in more detail from simple to complex practices. Summary and evaluation analysis tools must be clear, the amount of test practice material so that there is a balance of theory and practice, the size of the book should be chosen for an elegant appearance, especially if proposed to ISBN. Based on test data and analysis of the abovementioned, teaching material draft can be declared eligible as the practical of teaching jobsheet. This research only reached the stage of formative evaluation on Jobsheet, it is expected in the future to do more research to determine its effectiveness in an effort to increase the competence of students.
PERBAIKAN PERAPEN PERAJIN GAMELAN DESA TIHINGAN KLUNGKUNG BALI DAPAT MENINGKATKAN PRODUKTIVITAS KERJA PERAJIN I Ketut Gede Juli Suarbawa; I Ketut Bangse
Bhakti Persada Jurnal Aplikasi IPTEKS Vol 1 No 1 (2015): November 2015
Publisher : P3M Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (594.425 KB)

Abstract

Proses produksi pembuatan gamelan ini masih tradisional dengan menggunakan prapen (tempat kerja) dengan nyala api terbuka baik untuk proses peleburan maupun proses pembakaran bahan untuk pembentukan gamelan (nguwad)untuk proses peleburan dan pembentukan sehingga meningkatkan beban kerja perajin akibat paparan panas radiasi dan debu. Kondisi lingkungan kerja perajin yang belum nyaman dimana rerata suhu basah di tempat kerja mencapai 27,85 ± 0,12 oC dan rerata suhu kering mencapai 31,09 ± 0,97 oC, sehingga sebagian besar perajin merasakan beban yang cukup berat dalam proses kerja, terutama pada proses peleburan dan proses nguwad (pembentukan gamelan). Proses kerja peleburan dan proses nguwad beban kerja perajin cukup berat disertai paparan panas radiasi, adanya debu yang potensial menggangu kesehatan kerja dan lingkungan, hal ini menyebabkan produktivitas perajin menjadi rendah. Selain itu proses kerja yang cukup berat menyebabkan perajin tidak mampu bekerja sepanjang hari dan sering setelah berturut-turut kerja selama 3 hari mereka libur selama 1 hari. Tentu kondisi ini menyebabkan berkurangnya penghasilan perajin. Ongkos yang diterima perajin adalah dengan sistem borongan dalam satu kelompok perajin yang terdiri dari 3 sampai 4 orang per group. Meningkatnya kelelahan perajin ini dikarenakan adanya lingkungan kerja yang panas akibat paparan panas dari tungku yang terbuka, dan adanya sikap kerja berdiri dan membungkuk saat penuangan logam cair ke dalam cetakan serta jika duduk sering dengan sikap duduk tidak alamiah. Untuk itu perlu dilakukan penerapan iptek bagi masyarakat melalui perancangan sistem pembuangan asap dan debu melalui pendekatan ergonomi dengan rancangan pre and post test desaign group. Setelah penggunaan sistem pembuangan asap dan debu, diperoleh bahwa terjadi penurunan kadar debu di tempat kerja dari rata-rata 49,51 µg/m3 menurun menjadi 25,90 µg/m3. Demikian juga rerata denyut nadi tukang perapen mencapai 115,31 ± 2,56 denyut/menit, setelah perbaikan menurun menjadi rerata 111,81 ± 3,52 denyut/menit. Rerata denyut nadi tukang jepit mencapai 114,71 ± 3,24 denyut/menit menurun menjadi 110,41 ± 4,96 denyut/menit dan rerata denyut nadi tukang nguwad mencapai 125,71± 3,21 denyut/menit (katagori beban kerja berat) menurun menjadi rerata 123,01 ± 2,05 denyut/menit (katagori beban kerja sedang). akibat suhu lingkungan yang tinggi, suhu tubuh akan meningkat sehingga meningkatkan denyut nadi. Keluhan Kelelahan menurun dari skor 52,79 menurun menjadi 38,51 dan skor keluhan otot skeletal juga menurun dari 58,44 menjadi 38,74. Sehingga produktivitas meningkat dari rata-rata 0,89 menjadi 1,04.
Kajian termodinamik kinerja AC split: studi kasus pada bangunan pendidikan dengan menerapkan program komputer I Wayan Adi Subagia; I Dewa Made Susila; Ketut Bangse; I Nyoman Suamir
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1059.523 KB) | DOI: 10.31940/jametech.v3i1.36-42

Abstract

This paper presents a thermodynamic study on energy performance of a split AC system with R-32 for the application of educational buildings at the Bali State Polytechnic. The study was conducted using a standalone computer program U-CoolS V.1.12 which was developed on the EES (Engineering Equation Solver) V11,334 program. A thermodynamic model was developed and validated using data from the technical specifications of various types of split AC. Thermodynamic studies were carried out based on variations in ambient temperature in the Bali Region. The effect of two operating parameters of a split AC system, namely the condensing temperature in the condenser and the evaporation temperature of the refrigerant in the evaporator, on the compressor performance and energy performance of the AC system is simulated. Thermodynamic simulation results show the strong influence of condensing temperature and evaporation temperature on compressor performance and overall energy performance of the split AC system. It was found that for 1 °C increase in condensing temperature, the compressor power increased quite significantly around 2.1%, the cooling capacity of the split AC system decreased by 1.8%, COP and EER also decreased by 3.9%. Meanwhile, for 1 °C increase in evaporation temperature, it was found an increase in compressor power consumption of around 0.31%, an increase in cooling capacity of 4.4% and an increase in COP and EER of 4.1%. The results of this thermodynamic study also show that the split AC system performance using R-32 refrigerant has a very good COP range from 3.27 to 5.95 with the implication that R-32 refrigerant has the potential to be a refrigerant for a split AC system.