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Harita Nurwahyu Chamidy
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Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Pengaruh Komposisi Bahan Bakar Oli Bekas dan Minyak Goreng Bekas Terhadap Suhu Pembakaran Pada Kompor Bertekanan Harita Nurwahyu Chamidy
Jurnal Serambi Engineering Vol. 10 No. 3 (2025): Juli 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The management of waste has become a increasingly intricate matter due to the rising volume of household waste. The present study evaluates the effect of the composition of a mixture of used oil and used cooking oil as an alternative fuel on the combustion temperature in a steam pressurized stove. Four distinct variations of fuel composition were meticulously executed: 300:0, 150:150, 50:250, and 0:300. These variations were then subjected to rigorous testing, entailing the measurement of temperature at the steam output chimney section at five-minute intervals for a duration of 40 minutes. The findings indicated that augmenting the quantity of cooking oil in the mixture led to a reduction in combustion temperature. The highest recorded temperature was attained at a composition of 300:0 (pure used oil), reaching 680°C, while the lowest temperature was observed at a composition of 0:300, with a temperature of 275°C. A subsequent analysis of variance (ANOVA) revealed a statistically significant disparity in the average combustion temperatures of the distinct fuel compositions (p-value < 0.05). The composition of the pure used oil, characterized by its high hydrocarbon content and calorific value, yielded a combustion process that was more efficient and stable. In contrast, cooking oil exhibited a lower combustion efficiency. The present study lends support to the utilization of liquid waste as an alternative fuel, a practice that has the dual benefits of reducing waste volume and producing useful by-products, including heat energy and gas.
Development of a Smart IoT-Integrated Watering System for Moth Orchid (Phalaenopsis amabilis) Cultivation in the SMASHTHETIC Greenhouse Permanasari, Ayu Ratna; Harita Nurwahyu Chamidy; Bevi Lidya; Ari Marlina; Endang Widiastuti; In Jumanda Kasdadi
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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A greenhouse is a controlled environment designed to enhance plant productivity by regulating microclimatic conditions. However, in many greenhouse systems, the irrigation process is still performed manually, resulting in suboptimal water use efficiency and inconsistent watering schedules. The SMASHTHETIC greenhouse serves as a cultivation facility for the moth orchid (Phalaenopsis amabilis), which requires precise control of substrate moisture and ambient humidity to ensure optimal growth and flowering. This study aims to design and implement an automatic irrigation system based on Arduino and the Internet of Things (IoT) to improve irrigation efficiency in the SMASHTHETIC greenhouse. The system consists of a soil moisture sensor, Arduino microcontroller, Wi-Fi module (ESP8266/ESP32), and actuators such as a water pump and solenoid valve to regulate water flow. IoT integration enables real-time monitoring and remote control via web and smartphone applications. Experimental results show that the system automatically adjusts watering frequency and duration based on soil moisture data, providing convenience for users and reducing manual intervention. Therefore, this study demonstrates that the integration of Arduino and IoT technologies in greenhouse irrigation supports the development of smart agriculture practices that are more efficient, sustainable, and productive.
Co-Authors Ari Marlina Bevi Lidya In Jumanda Kasdadi Permanasari, Ayu Ratna Widiastuti, Endang