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All Journal Logic : Jurnal Rancang Bangun dan Teknologi Bhakti Persada Jurnal Aplikasi IPTEKS JAMETECH BHAKTI PERSADA Jurnal Aplikasi IPTEKS (Journal of Applied Sciences and Technology)

I Wayan Adi Subagia

Politeknik Negeri Bali

Author-ID : 4068483

Arts Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Nursing Public Health Social Sciences Transportation

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PENGARUH VARIASI DIAMETER PIPA KAPILER PADA SIKLUS TEMPERATUR RENDAH TERHADAP PERFORMANSI TRAINER UNIT SISTEM REFRIGERASI CASCADE I Wayan Adi Subagia; I Dewa Made Susila
Logic : Jurnal Rancang Bangun dan Teknologi Vol 16 No 3 (2016): November
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (249.102 KB)

Sistem refrigerasi cascade merupakan salah satu sistem yang digunakan pada sistem refrigerasi temperatur rendah, keuntungan sistem ini dapat menggunakan jenis refrigeran yang berbeda. Banyak parameter yang mempengaruhi performansi sistem refrigerasi, salah satunya geometri (diameter) pipa kapiler sebagai alat ekspansi yang digunakan pada sistem refrigerasi kompresi uap. Oleh karena itu pada penelitian ini akan dilakukan studi pengaruh penggunaan diameter pipa kapiler yang berbeda, pada sistem refrigerasi cascade dua tingkat terhadap performansi sistem. Dari hasil pengujian untuk penggunaan diameter pipa kapiler 0,036” dan 0,042” didapat rasio tekanan sebesar 4,01 dan 2,81 atau meningkat sebesar 42,6 % untuk penggunaan diameter pipa kapiler yang lebih kecil, capaian temperatur evaporator terendah masing-masing sebesar -37,2 oC dan -20,9 oC, COP sistem 0,74 lebih rendah sebesar 22,9% dibandingkan dengan penggunaan pipa kapiler 0,042” sebesar 0,91, dan konsumsi daya sistem sebesar 0,935 kW lebih besar 0,3 % dibandingkan menggunakan pipa kapiler diameter 0,042” sebesar 0,932 kW.

RANCANG BANGUN ALAT PENUKAR KALOR THERMOSYPHON UNTUK PENDINGINAN DENGAN MODUL TERMOELEKTRIK I Dewa Gede Agus Tri Putra; I Dewa Made Susila; I Wayan Adi Subagia
Logic : Jurnal Rancang Bangun dan Teknologi Vol 13 No 1 (2013): March
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (168.373 KB)

Aplikasi pendinginan dengan modul termoeletrik untuk AC di daerah tropis seperti Indonesia masih cukup menjanjikan. Tingkat kenyamanan untuk orang Indonesia masih berada pada kisaran kondisi udara dalam ruangan dan bisa dikatakan tidak membutuhkan rentang penurunan temperatur yang cukup besar. Untuk optimasi perpindahan panas modul termoelektrik pada sisi dinginnya perlu dirancang sebuah penukar kalor yang sesuai dengan desain dari modul thermoelektrik yang akan digunakan. Metode yang digunakan dalam melakukan kajian desain alat penukar kalor ini, menggunakan metode simulasi CFD. Solidwork flow simulation adalah software yang dipakai dalam melakukan kajian thermal pada desain dan mensimulasikan data numerik yang menjadi input dalam pendekatan kondisi operasional alat penukar kalor. Setelah proses rancang bangun alat penukar kalor maka desain rancangan tersebut memiliki luas bidang perpindahan kalor 25687,4 mm2, jumlah pipa penukar kalor 68 buah dengan panjang 40 mm. Perpindahan panas maksimum alat penukar kalor adalah 0,0093 kJ/detik.

MEKANISASI BUDIDAYA JAMUR TIRAM PUTIH UNTUK MENINGKATKAN KAPASITAS PRODUKSI PETANI Made Rasta; Putu Wijaya Sunu; I Wayan Adi Subagia; I K Widana
Bhakti Persada Jurnal Aplikasi IPTEKS Vol 4 No 2 (2018): November 2018
Publisher : P3M Politeknik Negeri Bali

Mushrooms are one type of food that needs attention regarding community food security. White oyster mushroom (Pleurotus ostreatus) is currently quite popular and much loved by the public because of its delicious taste and high nutritional value. Aside from being a food ingredient, oyster mushrooms are also useful as health or medicine. White oyster mushroom cultivation is one of the agribusiness businesses that have a large business opportunity because it has an increasing economic value. Pleurotus ostreatus is known as a fungus that is easily cultivated and is widely developed on wood substrate media that has been packaged in plastic bags and then incubated and maintained in a contact house. On the other hand, the presence of mushroom commodities in the market is still scarce, the scarcity of mushrooms due to the lack of mushroom cultivation producers and the activity of mushroom production is not optimal. Partner problems are an understanding of innovation and technology that supports and can help ease the work of mushroom cultivation to increase production is still limited. The aim to be realized from this activity is to strengthen and increase the capacity of innovation and technology in mushroom cultivation so that the productivity and economy of mushroom farmers can be increased. In order to overcome these obstacles an automatic temperature and humidity regulation system, baglog press machine and training on machine operation and marketing management are carried out. The results of the Community Partnership Program (PKM) activities are the availability of mushroom house temperature and humidity control machines, baglog press machines. So that is expected to increase production and have an impact on the economy of mushroom farmers that are getting better.

PEMASANGAN INSTALASI LISTRIK, PENCAHAYAAN DAN AIR BERSIH DI PURA RIJASA DESA BAHA, MENGWI Made Rasta; I G.K. Abasana; I N. Suamir; P.W. Sunu; IW A Subagia; I K Widana
Bhakti Persada Jurnal Aplikasi IPTEKS Vol 4 No 2 (2018): November 2018
Publisher : P3M Politeknik Negeri Bali

Temple as a holy place of Hinduism in Bali inherited by the ancestors needs to be preserved. Temple as a means of worshiping God has a very broad dimension, in which there are various kinds of natural forces that can lead us to safety and happiness in this life. Temples that have old age due to the influence of time, are naturally damaged. In such conditions, the people are obliged to make improvements. The development carried out should continue to maintain its original function for its sustainability. The restoration carried out by the funding community was supported by the assistance of the Badung Regency Government and the descendants of the people and donations from donors. The main problem of the people is the limited availability of funds needed to repair the temple. Another thing that is urgently needed by the people is the availability of lighting and clean water. The purpose of this service is the availability of lighting and clean water in the temple to support temple activities. Religious ceremonies are essentially not only religious dimensions, but also social, artistic, economic, management and other dimensions. Through religious ceremonies, it can be fostered harmony between fellow human beings, families, one village with another village. Religious ceremonies also train people to be able to organize and are management exercises in regulating the course of the ceremony. Through religious ceremonies, ethics and aesthetics are also fostered. Religious ceremonies are very potential motivators to preserve or develop cultural arts, both the sacred and the profane. Even religious ceremonies are one of the attractions of tourism and can support human life. All religious cultures in the form of religious ceremonies are human endeavors to draw closer to Ida Sang Hyang Widi wasa to realize lasting peace and happiness. Balinese culture actually upholds the values of balance and harmonization, reflected in the teachings of Tri Hita Karana (three causes of welfare). If humans are able to maintain a balanced and harmonious relationship with these three aspects, welfare will be realized. Construction of temples complete with facilities and infrastructure, is expected to provide broad benefits for the community in developing tourism in Badung and Baha especially. Increasing the quality of the people, both as individual beings and as social beings. Community welfare will indirectly increase through economic performance and changes in the economic structure generated by the development of tourism.

Analisa perpindahan panas melalui selubung bangunan menggunakan aplikasi coolpack Luh Putu Ike Midiani; I Wayan Adi Subagia; I Kadek Dwiana; I Putu Merta Adnyana
Journal of Applied Mechanical Engineering and Green Technology Vol. 2 No. 3 (2021): November 2021
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Dalam sebuah bangunan, kenyamanan termal penghuni, efisiensi energi, dan pembangunan berkelanjutan merupakan syarat yang harus terpenuhi. Hal tersebut dapat dilakukan dengan mengontrol perpindahan panas dan mengelola aliran panas dalam hunian tersebut. Selubung bangunan dengan kinerja termal yang baik dapat mengurangi konsumsi energi yang digunakan untuk pemanasan dan pendinginan serta meningkatkan efisiensi energi bangunan. Oleh karena itu, parameter termodinamika selubung bangunan merupakan informasi penting untuk simulasi energi bangunan dan meningkatkan efisiensi energi bangunan yang ada. Penelitian ini menganalisis kinerja termal dinding bangunan dan konsumsi energi bangunan dengan menggunakan aplikasi coolpack. Pengetahuan tentang konduktifitas termal bahan, temperatur lingkungan, dan pemilihan ketebalan dinding menjadi dasar untuk merancang selubung bangunan yang benar. Desain selubung yang baik atau pemasangan insulasi termal yang bak dan benar akan menjamin kinerja termal yang baik, mengurangi polusi dan biaya energi yang rendah yang dibutuhkan untuk memanaskan dan mendinginkan bangunan. Aplikasi coolpack mengevaluasi distribusi temperatur di dinding dan menghitung ketahanan termal lapisan, koefisien perpindahan panas keseluruhan dan laju aliran panas.

Penentuan ukuran pipa kapiler dengan program aplikasi CapSel Versi 1.0 pada AC trainer unit jenis ekspansi langsung dengan R-410A I Dewa Made Susila; I Wayan Adi Subagia; I Made Rasta
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 1 (2022): March 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

The use of air conditioning system currently mostly uses the vapor compression cycle. One such air conditioning machine is a direct expansion type AC. In this type of air conditioner, the air is directly cooled by the refrigerant. Cold air is flowed through the air duct to be entered into the room to be cooled. The refrigerant used is R-410A which does not contain chlorine so it does not cause depletion of the ozone layer because it has an ODP = 0. This direct expansion unit trainer uses an expansion device in the form of a capillary tube and an external equalizer type TXV. To determine the size of the capillary tube on the trainer unit, the direct expansion type uses the CapSel version 1.0 application program. By using the input data for refrigerant type R-134A, refrigeration capacity 2,637.6 Watt (9000 BTU/hour), evaporation temperature 5 °C condensation temperature 47 °C, and return gas temperature 12 °C, the recommended capillary pipe size data is obtained, namely the length of the pipe. capillary 1.47 m with an inner diameter of 2.50 mm. The test was carried out by varying the velocity of the air leaving the airways at high speed (22.3 ft/s) and at low speed (7.9 ft/s). The refrigerant temperature and pressure data are measured at 4 measurement points and the measurement of the electric current entering the system. After processing the data and entering it into the Coolpack application program, the average COP and EER in the low speed position produce a higher price than the high speed position.

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

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.

Penggunaan refrigeran hidrokarbon MC-134 pada mesin freezer untuk pedagang es krim keliling I Dewa Made Susila; Daud Simon Anakottapary; I Wayan Adi Subagia; Putu Wijaya Sunu; I Nengah Ardita
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 2 (2022): July 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/jametech.v3i2.48-52

This study aims to determine the performance and energy consumption of the freezer machine for mobile ice cream sellers using the environmentally friendly MC134 refrigerant with a compressor capacity of 1/10 HP. This research was conducted using an experimental method. The size of the capillary tube is determined using the Cap Tube 1.0.8.0 application program. The evaporator used is a bare tube type that is wrapped around an ice cream box. The test is carried out by measuring the temperature and pressure of the refrigerant, the temperature in the ice cream box, as well as the electric current and voltage in the system. The results of the analysis of performance and energy consumption will also be compared if the system uses HFC134a refrigerant. From the test results obtained the optimum mass that is filled into the system for MC134 refrigerant is 155 grams and the optimum mass for 134a refrigerant is 202 grams. The use of MC134 refrigerant is more efficient by 23.3%. The COP for MC134 refrigerant is 3.1 while the COP for 134a refrigerant is 2.7. The energy consumption for MC134 is 67.8 kJ while for R134a is 83 kJ.

Perilaku supercooling pada proses solidification material perubahan fasa berbasis air I Made Rasta; I Nyoman Suamir; Adi Winarta; I Wayan Adi Subagia; I Dewa Made Susila
Journal of Applied Mechanical Engineering and Green Technology Vol. 3 No. 2 (2022): July 2022
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/jametech.v3i2.71-77

Thermal energy storage based on phase change material (PCM) as an energy storage material is considered a promising technology to meet future energy needs due to its low cost and high storage capacity under isothermal conditions. Thermal energy storage is an inevitable component of intermittent use of renewable energy technology, due to its significant role in improving efficiency and Quality of Service (QoS). At present, one of the main researchers in such systems is to improve the efficiency of heat exchangers and heat carriers. Therefore, studying the thermal behaviour and thermophysical properties of heat storage is very important. Supercooling is a thermophysical property of PCM that is problematic in thermal storage applications and is a challenge in technical applications. Supercooling of phase change materials (PCM) during the process of changing from liquid to solid is a major problem in thermal energy storage, which reduces energy efficiency and exacerbates energy wastage. This study focuses on the supercooling characteristics of PCM under heterogeneous nucleation, which provides a new idea to investigate the effect of nucleating agents on the supercooling rate of aqueous solutions. Understanding, predicting and, where possible, preventing, or at least reducing, supercooling is of particular importance for latent heat thermal energy storage systems, as the temperature differences within them must be small to achieve higher efficiencies. Water is the most popular PCM today, because it has good characteristics, but has a weakness, namely high supercooling. Various methods have been sought and developed to control the behaviour of supercooling fluids. The most economical and efficient method for reducing or eliminating supercooling is the addition of a nucleating agent. Various PCM samples, namely propylene glycol solution in water, were made in various percentages (10/90, 20/80 and 30/70) with the aim of reducing supercooling of water. The samples made were tested by the T-history method. The results showed that the water supercooling decreased with the increase in the percentage of propylene glycol solution in water, from 10 degrees to 6, 4, 2 degrees respectively, making it suitable for cooling applications.

PKM Revitalisasi Sistem Penerangan Dan Sistem Suplay Air Bersih Pemakaman Muslim Tunggasari Dauh Peken Tabanan Sudirman; Made Ery Arsana; I Wayan Suastawa; I Wayan Adi Subagia; I Dewa Gede Agus Tri Putra; I Nengah Darma Susila
Bhakti Persada Jurnal Aplikasi IPTEKS Vol. 9 No. 1 (2023): Bhakti Persada Jurnal Aplikasi IPTEKS
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/bp.v9i1.67-74

Tempat pemakaman diharapkan selain tertata rapi dan bersih, orang yang berziarah bisa dengan mudah mencari makam anggota keluarganya. Selain tertata rapi dan bersih, pemakaman juga harus dalam kondisi terang pada malam hari. Saat ini, terutama kondisi Pandemi Covid-19, yang terpapar Covid-19 sehingga meninggal dunia, harus dimakamkan segera, walaupun itu saat tengah malam. Karena itu lingkungan pemakaman harus cukup terang saat malam hari. Kegiatan PKM ini bertujuan untuk meningkatkan fasilitas-fasilitas yang ada di pemakaman Muslim Tunggal sari, tertama untuk fasilitas penerangan dan fasilitas air bersih. Sehingga peningkatan fasilitas yang ada mendukung kegiatan-kegiatan yang dilakukan saat malam hari. Selain itu, fasilitas tersebut akan menghilangkan kesan seram dari sebuah pemakaman dan memperindah kota Tabanan. Kegiatan ini selain melibatkan dosen-dosen yang ada di Jurusan Teknik Mesin PNB, juga melibatkan mahasiswa dalam pelaksanaan instalasi penerangan dan air bersih. Hasil dari kegiatan ini berupa penggantian kabel instalasi lampu, kap lampu dan lampunya sebanyak 11 titik, outdoor panel untuk power outlet 1 titik, 3 titik lampu tenaga PLTS, instalasi air bersih beserta keran air sebanyak 5 titik, dan tower tank kapasitas 1200 liter. Hasil evaluasi kegiatan menunjukkan bahwa masyarakat memberikan persepsi yang sangat baik terhadap pelaksanaan kegiatan PKM dalam wujud perawatan dan instalasi penerangan PLN, PLTS dan instalasi sistem suplai air bersih di Pemakaman Tunggalsari, sekaligus menunjukkan keberhasilan implementasi program PKM PNB.

Co-Authors Adi Winarta Daud Simon Anakottapary I Dewa Gede Agus Tri Putra I Dewa Gede Agus Tri Putra I Dewa Made Susila I Dewa Made Susila I Dewa Made Susila I G.K. Abasana I K Widana I Kadek Dwiana I Ketut Bangse I Made Rasta I Made Rasta I Nengah Ardita I Nengah Darma Susila I Nyoman Suamir I Putu Merta Adnyana I Wayan Suastawa I Wayan Temaja Ida Bagus Widiantara Luh Putu Ike Midiani Made Ery Arsana Made Rasta Negara, I Gede Artha Putu Wijaya Sunu Sudirman

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