Jurnal SPEKTRUM
Jurnal SPEKTRUM is peer review journal, published four times a year by the Department of Electrical Engineering, Faculty of Engineering, Universitas Udayana. This journal discusses the scientific works containing results of research in the field of electrical, include: power systems, telecommunications, computers, informatics, controls, and electronics. Authors are expected to include original scientific papers in accordance with the scope of the discussion of this journal including all aspects of the theory and practice are used.
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<![CDATA[IMPLEMENTASI SISTEM PEMANTAUAN SUHU DAN KELEMBABAN UDARA BERBASIS IOT PADA PLANT FACTORY KEBUN PERCOBAAN FAKULTAS PERTANIAN UNIVERSITAS UDAYANA ]]>
<![CDATA[I Nyoman Agus Junaedi]]>;
<![CDATA[Anak Agung Ngurah Amrita]]>;
<![CDATA[I Nyoman Setiawan]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p2
<![CDATA[Plant factory is a technological development in agriculture that is able to overcome the decline in productivity in the agricultural sector caused by limited agricultural land. The concept of the plant factory itself is the application of a good environmental condition for plants to grow indoors which is easy to control so that they are not affected by the weather outside. The temperature and humidity in the plant factory must be monitored and controlled in real time with an Internet of Things (IoT) technology that utilizes internet connectivity to connect and transmit data. The system is designed using two microcontrollers, namely Arduino nano which functions as an input reader for temperature and humidity sensors, namely the DHT22 sensor, while ESP32 functions as a module for sending DHT22 sensor data to the Blynk via an internet connection to be stored in the database and can be accessed via the smartphone user. The ESP32 also functions as an automatic control of air humidity and air conditioning (AC) control remotely via a smartphone.]]>
<![CDATA[STUDI ANALISA PENGHEMATAN ENERGI DI GEDUNG DEWAN PERWAKILAN RAKYAT DAERAH KABUPATEN BADUNG ]]>
<![CDATA[I Wayan Sastrawan]]>;
<![CDATA[I Gede Dyana Arjana]]>;
<![CDATA[Cok Gede Indra Partha]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p7
<![CDATA[Today, excessive use of electrical energy will certainly cause energy wastage, given the energy crisis that has hit all countries, the government must have made efforts to save energy use. In 2019, the energy consumption of the Badung Regency DPRD Building was 41.8 kWh/m2 month, when compared to the Minister of Energy and Mineral Resources Regulation No. 13 on an Air-conditioned Building, which was 14 kWh/m2 month, the DPRD Building was included in the wasteful category. Based on these problems, efforts are needed to evaluate the use of electrical energy in the DPRD Building by means of energy conservation. The purpose of the study was to identify the potential for saving electrical energy that can be applied to the Badung Regency DPRD Building. The research method uses a descriptive quantitative approach where the results of calculations and measurements are then described and compared with Indonesian national standards on energy conservation. The results of the research show that the potential for saving electrical energy can be done by replacing the standard Split AC into a low watt AC where the electrical energy savings are obtained by 11.62% or a budget savings of Rp. 21,068,468.-]]>
<![CDATA[RANCANG BANGUN SISTEM PEMANTAU SUHU BEARING MOTOR UNTUK POMPA SIRKULASI AIR BERBASIS IOT ]]>
<![CDATA[I.G.W. Artana]]>;
<![CDATA[W.G. Ariastina]]>;
<![CDATA[I.N.S. Kumara]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p3
<![CDATA[The importance of monitoring the temperature of the motor bearing on the water circulation pump on a regular basis to prevent pump operation failures due to bearing. The operator monitors the temperature bearing manually using a Flir measuring instrument with potential hazards in the work area namely slipping, falling and electrocution. On this basis, IoT based bearing monitoring system for circulation water pump in real time is very necessary.The design of this prototype uses hardware such as ESP32 microcontroller and MLX90614-BCC sensor, while the software used are blynk and google spreadsheet. The MLX90614-BCC sensor calibration uses a linear regression method to adjust the sensor value to the Flir TG167 so as to minimize deviations in temperature readings.The results of this prototype are able to read temperature bearing well which are integrated with the blynk on smartphones by displaying temperature values in the form of numbers and graphs and also equipped with a notification. The prototype that was built had an average measurement deviation of 0.32% on the DE sensor and 0.3% on the NDE sensor. Storage of temperature data on google spreadsheet with the amount of data that can be stored as much as 1,666,666 data. The conclusion of the research is that it has succeeded in designing and manufacturing a prototype IoT based bearing monitoring system for circulation water pump. Testing the performance of the prototype can work well. The results of the prototype test on bearing for the water circulation pump showed that DE and NDE bearing temperatures were still below 55 °C and there was no notification on the smartphone which indicates the motor bearing is still in normal condition.]]>
<![CDATA[KAJIAN PENGGUNAANjALAT PENERANGANlJALAN TIPEILED DI JALAN BYfPASS MUNGGU TANAH LOT ]]>
<![CDATA[I Nyoman Tri Juliarta]]>;
<![CDATA[A A Gd Maharta Pemayun]]>;
<![CDATA[Gd Dyana Arjana]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p8
<![CDATA[The existence of public street lighting (APJ) as a means of supporting the road is very necessary to provide comfort, security, and safety for road users. Public street lighting that is not in accordance with the 2008 Indonesian National Standard (SNI) can cause road problems. SNI 2008 requires primary arterial roads to have an average illumination of 11-20 lux. The problem of lack of illumination occurs on the By Pass Munggu Tanah Lot road from the Seseh Beach traffic light intersection to the Singing beach road intersection, which has a length of 1.47 Km with a total of 21 street lighting points that produce an average illumination of 4,58 lux. The problem of harmonics in the electric power system is increasingly complex with the increasing use of non-linear equipment (eg LED lamps), where this equipment produces harmonics in voltage and current waves. In this study, harmonic calculations will be carried out on LED lamps and mercury lamps. The method used in the preparation of this research is a method of comparing the characteristics of mercury lamps and LED lamps, which is to compare from a technical and economic point of view. After that, match the provisions and conformity which in this case refers to SNI 2008.]]>
<![CDATA[PEMANFAATAN PLTS 10 kWp TERPASANG UNTUK CATU DAYA POMPA AIR DI DESA BAN KARANGASEM ]]>
<![CDATA[Awgustus Patandean]]>;
<![CDATA[I A Dwi Giriantari]]>;
<![CDATA[Wayan Gede Ariastina]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p4
<![CDATA[There are 19 banjars considered as custom And 16 official banjars at Ban Village located in the Regency of Karangasem Bali. The people in Ban, especially who live at the village of Tempek Asti and the village of Manik Aji, have troubles to get the ccess of fresh water. As the result, they must take a longdistance walk and the condition is teribly dangerous. The village of Manik Aji has off-grid system powered by PLTS 10 kWp which was built in 2017 by the minister of source and energy of Indonesian Republic. It had done by Manpower Department and ESDM of Bali Province. In 2021, PLN (Indonesian Electric state) had designed to supply the electricity at Manik Aji village. Therefore,the installed PLTS was functioned as the source of electric support to fulfill the society's needs of tempek Asti Manik aji village. The water pump type is AC submersible Kepeida 4SMP3 26-2,2 kWp and 2.093,14 Wh of energy. The total head is 60,005 meter which the power needed 2,2 kWp and 2.093,14 Wh of energy so the water pump can operate for 3,5 hours with the water debit is 3 m3/h producing 10.000 litter of water and has fulfilled the water needs of society at tempek Asti Manik Aji village about 1.200 litter daily.]]>
<![CDATA[IMPLEMENTASI SISTEM PEMANTAUAN KUALITAS AIR DENGAN IOT DI PLANT FACTORY KEBUN PERCOBAAN FAKULTAS PERTANIAN UNIVERSITAS UDAYANA ]]>
<![CDATA[I Putu A.B. Artha Wiraguna]]>;
<![CDATA[I Nyoman Setiawan]]>;
<![CDATA[Anak Agung Ngurah Amrita]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p9
<![CDATA[Plant Factory is a technological concept that forms an ideal environment for plant growth. Water quality has several factors including pH value, water nutrient level (ppm), water temperature and others, plants require a pH value of 5.5 to 6. Differences in pH values and plant nutrients affect plant growth. Lettuce Cultivation has different nutrient requirements for water where plants need around 1000-2000 ppm and 20-25°C in order to produce good growth. Therefore we need a system that can regulate and monitor water quality that can be monitored anywhere. Based on system testing that has been carried out for 30 days, it is found that all components used function as expected, the water quality monitoring sensor is able to detect the value of pH, TDS, water temperature with an average difference with measuring instruments below 2%. After being tested for 30 days from planting to harvesting, the tool can still function properly with indicators that this tool can record data for 30 days and store all data in the database accurately.]]>
<![CDATA[ANALISIS HOSTING CAPACITY PADA JARINGAN TEGANGAN MENENGAH UNTUK SUPLAI DAYA LISTRIK DAERAH PEDESAAN ]]>
<![CDATA[N.W. Budiantari]]>;
<![CDATA[W.G. Ariastina]]>;
<![CDATA[I.W.Sukerayasa I.W.Sukerayasa]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p5
<![CDATA[As technology advances, the use of electrical energy increases for this reason, energy conversion is needed, one of which is the installation of photovoltaic. Analysis hosting capacity on the distribution network serves to determine the flow of power when photovoltaic is installed and can analyze voltage, conductor loading, power loss, and good transformer loading when connected to the network.The analysis of hosting capacity on rooftop PV mini-grid spread over the distribution network is very useful for future planning if there is a massive energy transition that is implemented on rooftop PV mini-grid. The hosting capacity analysis on the distribution network was carried out in 2 scenarios, which were Scenario A for the Bangli feeder without being connected to the PLTS 1 MWp and Scenario B for the parameter B for the Bangli feeder being connected with the PLTS 1 MWp. The analyzed parameters included voltage, conductor loading, transformer loading and power losses in network. The results of the analysis showed that the distribution network hosting capacity is 40%, for both Scenario A and Scenario B.]]>
<![CDATA[AUDIT ENERGI DAN MONITORING BERBASIS IOT UNTUK PENINGKATAN EFISIENSI PENGGUNAAN LISTRIK DI ART CENTER DENPASAR ]]>
<![CDATA[Novian Bayu Putranto]]>;
<![CDATA[Agus Dharma]]>;
<![CDATA[Putu Ayu Rhamani Suryadhi]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p10
<![CDATA[An energy audit is needed to find out energy saving opportunities (PHE) so that it will reduce the amount of electricity bills at the Denpasar Art Center which is used as a cultural performance center in Bali. A more specific location in this research is the Ksirarnawa Art Center Denpasar Building in the lighting section. The energy audit in this study is combined with an IoT-based electrical energy monitoring tool so that electricity usage can be monitored in real time. This IoT-based electrical energy monitoring uses Arduino Nano as a data processor as well as sending data to a site service called Thingspeak to record and display data from sensors. The sensors used are the ZMPT101B voltage sensor and the YHDC SCT 013-000 current sensor which are integrated with the NodeMCU as a module to connect to a wireless network. The results of the energy audit at the Denpasar Art Center got a potential Energy Saving Opportunity (PHE) of 33.6% with suggestions to related parties being to replace lamps using LEDs and to regularly set on/off times.]]>
<![CDATA[RANCANG BANGUN PROTOTYPE PLTMH DENGAN TURBIN TURGO ]]>
<![CDATA[I Gede Putu Aditya Kresna Artha K]]>;
<![CDATA[I Wayan Arta Wijaya]]>;
<![CDATA[I Gusti Ngurah Janardana]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p1
<![CDATA[Learning about using water resources as a MHP is need to implemented for Electrical Engineering students at Udayana University. Currently at the Energy Conversion Laboratory the Electrical Engineering Study Program Faculty of Engineering Udayana University cannot yet to carry out practicum on MHP due to the unavailability of devices and equipment. Therefor it needs to analyze the design of this MHP prototype. Turgo turbine is a classification of impulse turbine that require water pressure as a source to rotate the turbine. In this research a prototype of MHP with a turgo turbine has been formed which has a total of 18 blades with blade length 6,8 cm, blade width 4,68 cm, and blade depth 1,17 cm. This prototype has 1 nozzle with a diameter 2 cm that has beam angle of 70° which emits water with a pressure of 21 psi. This prototype is capable of producing power 7,268 Watt and torque 0,1228 Nm so that this prototype efficiency is 1,099%.]]>
<![CDATA[ANALISIS MANAJEMEN ENERGI AKIBAT ALIH FUNGSI RUANGAN PADA MASA PANDEMI DI RSD MANGUSADA BADUNG ]]>
<![CDATA[I Made Deny Setiawan]]>;
<![CDATA[I Gede Dyana Arjana]]>;
<![CDATA[Cok Gede Indra Partha]]>
<![CDATA[ Jurnal SPEKTRUM Vol 9 No 2 (2022): Jurnal SPEKTRUM ]]>
Publisher : <![CDATA[Program Studi Teknik Elektro UNUD ]]>
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DOI: 10.24843/SPEKTRUM.2022.v09.i02.p6
<![CDATA[In 2020 as a result of the Covid-19 pandemic, the number of patients at the Mangusada Hospital continued to increase. The increasing number of patients has led to a change in the function of the room in handling special patients with Covid-19. The change in the function of the room will certainly have an impact on changes in electrical energy consumption. The results showed that the measurement of light intensity and room temperature in Building C of RSD Mangusada did not meet the standards of the Minister of Health Regulation No. 7 of 2019. The factor causing the non-fulfillment of light intensity was because many lights had dimmed and died and in the air system the standards were not met due to performance. AC that is not optimal in cooling the room but is still used if this continues will be a waste of energy. Energy saving efforts can be applied to the lighting system by replacing TL-D lamps with 36watt power consumption, 2850 lumens with LED tube type EM/ Mains T8 lamps, power consumption of 18.2 watts, 2900 lumens where energy savings are obtained by 49.4% or budget savings of Rp. 134,514,169,-]]>
