Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
Essential oils from two species of mint leaves namely Mentha spicata (spearmint) and Mentha piperita (peppermint) were extracted using ethanol as the solvent. The leaves were mechanically cut into three particle sizes of BSS 200, BSS 80 and BSS 40. 200 ml of ethanol was used to extract oil from 40 grams of each particle size sample with a soxhlet extractor. The extraction was carried out at the boiling point of ethanol (78.37oc) for six hours and oil was recovered by boiling off the ethanol. The results obtained showed the yield of oil from Mentha spicata ranged from 12.44% to 38.50%, while Mentha piperita yielded oil ranging from 8.20% to 38.00%. The physio-chemical properties such as specific gravity, acid value, saponification value, peroxide value and iodine value were determined in other to characterise the two oils. The results obtained are as follows; the specific gravities of the oils are 0.935 and 0.862 for Mentha spicata and Mentha piperita respectively, acid values are 0.4769 and 0.4488 mg KOH/g Mentha spicata and Mentha piperita respectively. The saponification values are 93.126 and 86.394 mg KOH/g for Mentha spicata and Mentha piperita respectively, while the peroxide values are 8.50 and 7.0 mEqO2/kg for Mentha spicata and Mentha piperita respectively. The iodine values are 55.20 and 53.93 g I2/100g for Mentha spicata and Mentha piperita respectively. From the results obtained it is observed that the oil extracted from Mentha spicata is denser, and has a higher tendency to be rancid, has lower oxidation stability and higher proportion of unsaturated fatty acids
photovoltaic standalone buildings are suffering from energy volatility which mainly caused by weather conditions, for that, it is important to adopt a smart energy management system that able to manage the loads according to the available energy. Add for that the inverter overcurrent fault, which is mainly caused by the loads’ reactive power in a well-designed system. Power factor degrades leads to a decrease in the system’s efficiency and depriving it of the use of all available energy. The proposed system in this article offers a complete solution to manage the consumed energy according to the loads' priorities, available energy, user requirements, and the weather conditions for the day and two days ahead, as well as correct the power factor automatically by reducing the apparent power as well as the total current of the invertor. The presented system adopts an ESP32 microcontroller to monitor and control the loads remotely besides correcting the power factor by adding a capacitive load from capacitors bank and as required. AC power sensors PZEM-004T v3 had been used to monitoring the load's properties include voltage, current, active power, and power factor in the load branches and on the mainline. Results show a promising system that not only managed the consumed energy wisely but also improve the building power factor by 0.9