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All Journal IPTEKMA Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur Jurnal METTEK (Jurnal Ilmiah Nasional Dalam Bidang Ilmu Teknik Mesin) Logic : Jurnal Rancang Bangun dan Teknologi International Journal of Engineering and Emerging Technology J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Natural Sciences Engineering and Technology Journal Sibatik Journal : Jurnal Ilmiah Bidang Sosial, Ekonomi, Budaya, Teknologi, Dan Pendidikan Logic : Jurnal Rancang Bangun Dan Teknologi Mutiara: Jurnal Penelitian dan Karya Ilmiah
Made Sucipta
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Udayana
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The Effect of Variation in Expansion Valve Capacity on Cooling Performance in Cold Storage Machines I Putu Gede Krisna Mahendra Putra; Hendra Wijaksana; Made Sucipta
Natural Sciences Engineering and Technology Journal Vol. 3 No. 1 (2023): Natural Sciences Engineering and Technology Journal
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/nasetjournal.v3i2.31

Abstract

The rapid development of the food storage industry in Indonesia, especially for basic ingredients, is very influential in the business world, such as the business of supplying food, fresh meat, and vegetables, all of which require a storage device that can maintain the freshness and quality of the food. These various products. One example of such a tool is cold storage. The increasing demand for food products makes suppliers have to meet the great demand for food by increasing the supply of products. With such conditions, many suppliers or owners of cold storage complain that the cooling performance of cold storage is not being achieved as needed. The effect of variations of the three expansion valves shows that the 2.8 TR expansion valve has cooled, whereas the 2.8 TR expansion valve has a higher refrigeration effect, and the compressor work on the 3.7 TR expansion valve and 4.4 TR expansion valve has a significant increase. This can be caused by the increased refrigerant flow so that the compressor makes a greater effort to compress the refrigerant, and from that, the system workability (COP) has decreased. The effect of the variation of the three expansion valves shows that the expansion valve 4.4 TR has a faster decrease in room temperature, where the initial room temperature is considered uniform. The 4.4 TR expansion valve opens the valve gap earlier, and the refrigerant flow that flows is greater when the engine is started so that heat is absorbed by the evaporator faster.
Simulasi CFD Pertukaran Udara di Ruang Tindakan Klinik Kesehatan I Putu Widiarta; Made Suarda; Made Sucipta; I Gusti Ketut Sukadana
Jurnal Mettek: Jurnal Ilmiah Nasional dalam Bidang Ilmu Teknik Mesin Vol 8 No 2 (2022)
Publisher : Program Studi Magister Teknik Mesin Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/METTEK.2022.v08.i02.p03

Abstract

Klinik kesehatan merupakan fasilitas pelayanan kesehatan. Klinik kesehatan adalah bangunan yang penuh dengan sumber infeksi, terutama infeksi melalui udara. Pengendalian infeksi virus melalui udara dapat dilakukan dengan kontrol engineering yaitu dengan penambahan sistem ventilasi dan untuk mencapai kenyamanan termal ruangan maka dibutuhkan sistem pengkondisian udara. Penambahan sistem ventilasi mekanis berupa exhaust fan dan inflow membuat adanya sirkulasi udara dimana udara segar dimasukan melalui saluran inflow dan udara kotor dikeluarkan melalui saluran exhaust fan sehingga resiko penularan virus melalui udara dapat diminimalkan. Pola aliran dari sirkulasi udara penting dilakukan analisis karena agen infeksius yang ringan cendrung mengikuti pola aliran. Untuk mengetahui pola aliran dan pengaruh dari jumlah exhaust fan serta sudut flapper AC dilakukan dengan metode simulasi CFD (Computational Fluid Dynamics) serta dilakukan pengujian secara eksperimen yaitu pengukuran tekanan dan temperatur serta kelembaban udara relatif. Variasi sudut flapper AC pada pengujian tanpa penambahan sistem ventilasi memberikan pengaruh terhadap input aliran sehingga titik-titik vortex terjadi pada posisi yang berbeda-beda. Sedangkan sudut flapper AC pada penambahan sistem ventilasi tidak dominan memberikan pengaruh terhadap pembentukan pola aliran. Penambahan inflow dan exhaust fan menunjukan terjadi superposition flow. Sedangkan variasi jumlah exhaust fan menunjukan semakin banyak jumlah exhaust fan maka kecepatan aliran udara diruangan menjadi meningkat dan tekanan udara ruangan menurun serta sirkulasi aliran dalam ruangan menjadi lebih merata. The health clinic is facilities of health service. A health clinic is building fully on the infection source, especially airborne infection. The spread of virus control from the air can perform by engineering control such as added mechanical ventilation system and to reach the thermal comfort, a system of air conditioning is needed. In addition, a mechanical ventilation system that is an exhaust fan dan inflow can create the air circulation where fresh air enters through inflow channels and dirty air goes out through exhaust fan channels, so the risk of airborne infection can be reduced. The airflow pattern from air circulation is important for analysis because infectious agents which are light in weight that tend to follow the airflow pattern. To find out the airflow pattern and influence from variations of the number of exhaust fans as well as the angle of the AC flapper, it is done using the CFD (Computational Fluid Dynamics) simulation method and carried out experimental tests, namely the measurement of pressure and temperature. The angle of the AC flapper tested without added ventilation system influenced the input of stream from AC blower then, the position of vortex had indifference location. While the angle of the AC flapper tested with the additional mechanical ventilation system did not influence airflow pattern formation. Added inflow dan exhaust fan showed the occurrence of the superposition flow. While the more of the number exhaust fans shows, the velocity of air in the room increases and the indoor pressure is decreasing as well as the air circulation in the room becomes more equally.
Analysis of Heat Recovery System Performance Using a Serpentine-Type Heat Exchanger on Water Heater with Fins Number Variation I Gusti Agung Gede Kusuma Artha; Made Sucipta; Hendra Wijaksana
Natural Sciences Engineering and Technology Journal Vol. 3 No. 1 (2023): Natural Sciences Engineering and Technology Journal
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/nasetjournal.v3i2.34

Abstract

The water heater is a common facility found in hotels or homes. There are alternative ways to do this besides using water heaters on the market, namely by utilizing the heat generated by the compressor and which will be discharged through the condenser, by adding a heat recovery system to the air conditioning unit. These research tests were carried out on variations of the serpentine-type heat exchanger with variations in the number of fin plates on the performance of the heat recovery system and on the split air conditioner. This research is an experimental study on a serpentine-type heat exchanger. Tests were carried out on a variety of heat exchangers with variations in the number of fin plates combined with a heat recovery system on a split AC. The independent variables in this study were three variations of the placement of the fin plate on the serpentine-type coil and the setting of the output air of the AC evaporator. Enthalpy values, refrigeration effects, compressor work, condenser, and coefficient of performance (COP) are calculated and presented in tables and graphs. The results of the performance of the heat recovery system obtained variations in the setting of the air burst coming out of the evaporator 24ºC has the highest COP value. The use of a heat recovery system can increase COP. With variations in the number of fin plates in a heat recovery system with a serpentine heat exchanger, the use of 5 fin plates has the hottest water temperature compared to the use of 3 fin plates and 1 fin plate.
Evaluation of Serpentine-Type Heat Exchanger Application on Water Heater with Passages Number Variation I Gede Arya Dimas Wisnu Murti Surawardana; Made Sucipta; Hendra Wijaksana
Natural Sciences Engineering and Technology Journal Vol. 3 No. 2 (2023): Natural Sciences Engineering and Technology Journal
Publisher : HM Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37275/nasetjournal.v4i1.36

Abstract

For some people, using warm water for bathing needs is a tertiary need because getting warm water requires additional costs. Generally, people/industry use water heaters that are sold in the market. These water heaters generally use electricity, solar power, or natural gas. This study aimed to evaluate the use of heat recovery systems as water heaters with variations in the number of passages. This research is an experimental study on a serpentine-type heat exchanger. Tests were carried out on standard split air conditioners and split air conditioners integrated with heat exchangers. The independent variables in this study were variations of the heat exchanger type serpentine with a length of 4 m, with each heat exchanger having a height of 20, 25, and 30 cm, with variations of 10, 12, and 14 passages and variations of evaporator output air settings 16ºC, 20ºC and 24ºC. The use of the evaporator outlet air temperature setting produces a different refrigeration effect value. The lower the evaporator output air temperature setting, the lower the resulting refrigeration effect value. The air temperature leaving the evaporator is 24ºC which results in a higher refrigeration effect value. This study showed the best heater performance at the evaporator air setting of 16ºC with a variation of 10 passages. In conclusion, the addition of a heat recovery system with serpentine-type heat exchanger variations 10 passages, 12 passages, 14 passages, and 24°C temperature loading variations, 20°C and 16°C on the evaporator burst will have an impact on decreasing the coefficient of performance on the split air conditioner system.
Perbaikan Manajemen Bank Sampah Di Desa Selat Untuk Meningkatkan Nilai Tambah Pengolahan Sampah Menjadi Pupuk Organik Dengan Aplikasi Berbasis Android Komang Gede Darmayasa; Made Putra Sedana; I Putu Prasna Mahardika; I Kadek Heri Suardan; I Dewa Gede Andreano Eldo; Nengah Taksu Yusaramana; I Nyoman Mahatma Yogeshvara; I Kadek Dhananjaya Dana Putra; Made Naradha Adithya; I Made Dwijaksana; Made Agus Putra Harta Narayana; Putu Pande Devaryana Putra; Made Rasmika Werdhi Nugraha; I Putu Gede Raditya Wikadhyana; I Dewa Gede Agung Astina Wirayudha; Made Sucipta
Mutiara : Jurnal Penelitian dan Karya Ilmiah Vol. 1 No. 5 (2023): Oktober: Mutiara : Jurnal Penelitian dan Karya Ilmiah
Publisher : STAI YPIQ BAUBAU, SULAWESI TENGGARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59059/mutiara.v1i5.465

Abstract

The waste problem in Selat Village has caused severe environmental pollution. The main cause of this problem is because most of the people in Selat Village have not been able to carry out proper and integrated waste management, resulting in uncontrolled accumulation of waste. The general objective of this research is to initiate the progress of village areas in Indonesia regarding Waste Digitalization. The results of this study indicate that the Wita Bersih Application can shorten the time and make it easier for the Selat Village garbage bank in processing plastic waste.
Karakteristik Penyimpanan Biogas Dengan Karbon Aktif Berbasis Bambu Apus Dengan Steam Activation Made Sucipta; Hendra Wijaksana; Made Suarda; I Gusti Komang Dwijana; Epenetus Rapael; I Gede Krisna Pratama; Cindy Dwi Meylinda
Jurnal Energi Dan Manufaktur Vol 6 No 2 (2023): Oktober 2023
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2023.v16.i02.p08

Abstract

Salah satu metode penyimpanan biogas dapat dilakukan dengan teknologi Adosrbed Natural Gas (ANG) menggunakan media adsorben dengan luas permukaan yang besar. Karbon aktif merupakan media yang sangat atraktif untuk dapat digunakan pada teknologi ANG. Salah satu teknologi yang dikembangkan adalah aktivasi secara fisika dengan menggunakan media uap (steam). Pada penelitian ini telah dilakukan pembuatan karbon aktif dengan menggunakan metode steam activation dengan menggunakan precursor bambu apus dengan variasi temperatur karbonisasi sebesar 525 , 625 , dan 725 . Karbon yang dihasilkan selanjutnya diaktivasi dengan ukuran mesh 70-230 pada temperature 425 dengan holding time selama 2 jam. Hasil penelitian menunjukkan bahwa semakin besar temperatur karbonisasi maka semakin besar pula penurunan massa dari precursor bambu pada masing-masing proses karbonisasi dan aktivasi. Pada pengujian kemampuan penyimpanan biogas, karbon aktif sebanyak 15gram dimasukkan ke dalam tabung penyimpanan biogas. Sebagai pembanding, dilakukan pula pengujian dengan tabung penyimpanan tanpa karbon aktif. Hasilnya, kapasitas penyimpanan biogas yang lebih tinggi diperoleh pada tabung penyimpanan biogas yang diisi dengan karbon aktif daripada tabung penyimpanan tanpa karbon aktif. Kapasitas penyimpanan biogas meningkat seiring meningkatnya temperatur karbonisasi. Penyimpanan tertinggi tercapai pada temperatur 725 dengan massa 37,2gram pada tekanan 100 psi.
Characterization of Municipal Solid Waste as An Energy Source in The Gasification Process Temaja, I Wayan; I Nyoman Suprapta Winaya; I Ketut Gede Wirawan; Made Sucipta; I Putu Angga Yuda Pratama
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.129-134

Abstract

Municipal solid waste (MSW) poses significant environmental challenges if not managed effectively. The composition and quantity of MSW are closely linked to the socioeconomic structure of a given area. This study aimed to assess the feasibility of utilizing raw materials from Denpasar's MSW for gasification processes. Samples were collected, segregated, processed, and dried for analysis. Various physical and chemical properties were examined, including moisture content, volatility, fixed carbon, elemental composition, and calorific value. Proximate analysis on dry base sample revealed that the MSW contained 12.45% moisture, 54.68% volatile matter, 13.05% fixed carbon, and 19.82% ash. Ultimate analysis showed the following elemental composition: 64.46% C, 11.5% H, 18.3% O, 0.5% N, and 0.05% S, with a calorific value of 11.99 MJ/kg. Based on these findings, the implementation of a waste-to-energy program utilizing gasification processes for waste management is recommended.
Characterization of Municipal Solid Waste as An Energy Source in The Gasification Process I Wayan Temaja; I Nyoman Suprapta Winaya; I Ketut Gede Wirawan; Made Sucipta; I Putu Angga Yuda Pratama
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.129-134

Abstract

Municipal solid waste (MSW) poses significant environmental challenges if not managed effectively. The composition and quantity of MSW are closely linked to the socioeconomic structure of a given area. This study aimed to assess the feasibility of utilizing raw materials from Denpasar's MSW for gasification processes. Samples were collected, segregated, processed, and dried for analysis. Various physical and chemical properties were examined, including moisture content, volatility, fixed carbon, elemental composition, and calorific value. Proximate analysis on dry base sample revealed that the MSW contained 12.45% moisture, 54.68% volatile matter, 13.05% fixed carbon, and 19.82% ash. Ultimate analysis showed the following elemental composition: 64.46% C, 11.5% H, 18.3% O, 0.5% N, and 0.05% S, with a calorific value of 11.99 MJ/kg. Based on these findings, the implementation of a waste-to-energy program utilizing gasification processes for waste management is recommended.
Co-Authors A.A. Kade Argha Dharmawan A.A. Krisna Wira Putra Ainul Ghurri Anak Agung Istri Agung Sri Komaladewi Aqsal Raja Bramastha Cindy Dwi Meylinda Dewa Ngakan Ketut Putra Negara Dwi Payana Epenetus Rapael Gusti Ngurah Agung Satria Prasetya D.Y Hendra Wijaksana Hendra Wijaksana I Dewa Gede Agung Astina Wirayudha I Dewa Gede Agung Astina Wirayudha I Dewa Gede Andreano Eldo I Dewa Gede Andreano Eldo I Dewa Made Susila I G.N.A. Satria Prasetya D. Y. I Gede Arya Dimas Wisnu Murti Surawardana I Gede Hendra Gunawan I Gede Krisna Pratama I Gusti Agung Bagus Wirajati I Gusti Agung Gede Kusuma Artha I Gusti Bagus Wijaya Kusuma I Gusti Ketut Sukadana I Gusti Komang Dwijana I Kadek Dhananjaya Dana Putra I Kadek Dhananjaya Dana Putra I Kadek Heri Suardan I Kadek Heri Suardan I Ketut Adi Atmika I Ketut Adi Sugita I Ketut Gede Wirawan I Ketut Gede Wirawan I Made Agus Putrawan I Made Dhanu Wijaya I Made Dwijaksana I Made Dwijaksana I Made Suardamana I Made Widiyarta I Nengah Suarnadwipa I Nengah Suweden I Nyoman Gede Sujana I Nyoman Mahatma Yogeshvara I Nyoman Mahatma Yogeshvara I Nyoman Mariawan I Nyoman Suprapta Winaya I Putu Angga Yuda Pratama I Putu Gde Raditya Wikadhyana I Putu Gede Artha Negara I Putu Gede Krisna Mahendra Putra I Putu Gede Raditya Wikadhyana I Putu Prasna Mahardika I Putu Prasna Mahardika I Putu Widiarta I Putu Yajnartha I Wayan Surata I Wayan Temaja Ibnu Gusti Muttaqin Ida Bagus Oka Jeve K G Trisna Upadana Putra Ketut Astawa Komang Gede Darmayasa Komang Gede Darmayasa Komang Metty Trisna Negara Luh Putu Ike Midiani Made Agus Putra Harta Narayana Made Agus Putra Harta Narayana Made Naradha Adithya Made Naradha Adithya Made Putra Sedana Made Putra Sedana Made Rasmika Werdhi Nugraha Made Rasmika Werdhi Nugraha Made Suarda Nengah Taksu Yusaramana Nengah Taksu Yusaramana Ni Made Dwidiani Putu Pande Devaryana Putra Putu Pande Devaryana Putra Sitompul, Ignasius Deo Sudirman - Tjokorda Gde Tirta Nindhia Wayan Nata Septiadi