Browsing by Author "Gökozan H."
Now showing 1 - 5 of 5
Results Per Page
Sort Options
Item Comparative energy consumption analyses of an ultra high frequency induction heating system for material processing applications(Centro Nacional de Investigaciones Metalurgicas, 2015) Taštan M.; Gökozan H.; Taškin S.; Çavdar U.This study compares an energy consumption results of the TI-6Al-4V based material processing under the 900 kHz induction heating for different cases. By this means, total power consumption and energy consumptions per sample and amount have been analyzed. Experiments have been conducted with 900 kHz, 2.8 kW ultra-high frequency induction system. Two cases are considered in the study. In the first case, TI-6Al-4V samples have been heated up to 900 °C with classical heating method, which is used in industrial applications, and then they have been cooled down by water. Afterwards, the samples have been heated up to 600 °C, 650 °C and 700 °C respectively and stress relieving process has been applied through natural cooling. During these processes, energy consumptions for each defined process have been measured. In the second case, unlike the first study, can be used five different samples have been heated up to the various temperatures between 600 °C and 1120 °C and energy consumptions have been measured for these processes. Thereby, the effect of temperature increase on each sample on energy cost has been analyzed. It has been seen that as a result of heating the titanium bulk materials, which have been used in the experiment, with ultra high frequency induction, temperature increase also increases the energy consumption. But it has been revealed that the increase rate in the energy consumption is more than the increase rate of the temperature. Copyright: © 2015 CSIC.Item Analysis of artificial aging with induction and energy costs of 6082 Al and 7075 Al materials(CSIC Consejo Superior de Investigaciones Cientificas, 2019) Taştan M.; Gökozan H.; Çavdar P.S.; Soy G.; Çavdar U.In the study, 6082 Al and 7075 Al samples were subjected to a solution taking place at 580 °C for 1 min using ultrahigh frequency induction heating system (UHFIHS) and water was supplied at the end of the process. Artificially aging was then carried out at 190 °C for 2, 4, 6 and 8 min. In both applications, heating was carried out using an induction system with a frequency of 900 kHz and a power of 2.8 kW. For these aluminum series and shapes, induction heating and heat treatment costs in different shapes are calculated. In addition, the hardness values obtained from artificially aged 6082 Al and 7075 Al samples at 190 °C for 10 h were compared with conventional methods after 5 h at 540 °C for 5 h. As a result, the hardness values of 6082 Al samples, which were obtained in 10 h by conventional methods, were obtained by artificial aging for only 8 min using induction system. © 2019 CSIC.Item Real-time monitoring of indoor air quality with internet of things-based e-nose(MDPI AG, 2019) Taştan M.; Gökozan H.Today, air pollution is the biggest environmental health problem in the world. Air pollution leads to adverse effects on human health, climate and ecosystems. Air is contaminated by toxic gases released by industry, vehicle emissions and the increased concentration of harmful gases and particulate matter in the atmosphere. Air pollution can cause many serious health problems such as respiratory, cardiovascular and skin diseases in humans. Nowadays, where air pollution has become the largest environmental health risk, the interest in monitoring air quality is increasing. Recently, mobile technologies, especially the Internet of Things, data and machine learning technologies have a positive impact on the way we manage our health. With the production of IoTbased portable air quality measuring devices and their widespread use, people can monitor the air quality in their living areas instantly. In this study, e-nose, a real-time mobile air quality monitoring system with various air parameters such as CO2, CO, PM10, NO2 temperature and humidity, is proposed. The proposed e-nose is produced with an open source, low cost, easy installation and doit- yourself approach. The air quality data measured by the GP2Y1010AU, MH-Z14, MICS-4514 and DHT22 sensor array can be monitored via the 32-bit ESP32 Wi-Fi controller and the mobile interface developed by the Blynk IoT platform, and the received data are recorded in a cloud server. Following evaluation of results obtained from the indoor measurements, it was shown that a decrease of indoor air quality was influenced by the number of people in the house and natural emissions due to activities such as sleeping, cleaning and cooking. However, it is observed that even daily manual natural ventilation has a significant improving effect on air quality. © 2019 by the authors.Item Cost analysis of T6 induction heat treatment for the aluminum-copper powder metal compacts(International Institute for the Science of Sintering (IISS), 2020) Taştan M.; Gökozan H.; Çavdar P.S.; Soy G.; Çavdar U.This work compares an energy cost and an energy consumption results of the 4 wt.% cupper mixed aluminum based powder metal (PM) compacts processing under induction or furnace heating. Total power and energy consumptions and total energy costs per kilogram and compact have been analyzed. T6 precipitation heat treatment applications have been applied with two different methods, one with 2.8 kW, 900 kHz ultra-high frequency induction heating system (UHFIHS), other with 2 kW chamber furnace. In the first method, Al-Cu PM compacts have been heated by induction at 580 °C in one minute and then cooled down by water. Afterwards, the samples have been heated 170, 180, 190 and 200 °C respectively for artificial ageing and cooled naturally. In the second treatment, unlike the first study, Al-Cu PM compacts are heated by chamber furnace at 540 °C in 5 hours and cooled by water. Then PM compacts are artificially aged at 190 °C in 10 hours with same furnace. During both processes, energy and power consumptions for each defined process have been measured. Optimum heat treatment of the induction is determined. The cheaper energy cost is obtained by the induction heat treatment. © 2020 Authors. Published by association for ETRAN Society.Item Heat Treatment of 2024 and 5083 Aluminum Materials by Induction, a Competitive Method, and Cost Analysis(Springer, 2021) Çavdar U.; Taştan M.; Gökozan H.; Soy G.; Çavdar P.S.In the study, 2024 Al and 5083 Al bulk samples were heated using two different methods, induction and conventional heat treatment. Using these methods, the processing cost and time analysis for both materials were performed. 5083 Al material cannot be heat-treated. However, to evaluate differences in the production cost of induction by changing the components of aluminum, the same procedures were applied to 5083 Al material. In both aluminum series, square, cylindrical, and hexagonal shapes were processed, and the effect of sample shape variations on cost was evaluated. The heat treatment was performed in a conventional kiln of 2 kW. Al materials were heat-treated for 5 h at 540 °C, and water was suddenly supplied. Then they were left in the kiln at 190 °C for 10 h for artificial aging. Al samples were heat-treated in the same way at 590 °C for 1 minute in the 900 kHz ultra-high frequency induction heating system (UHFIHS), which was fed with instant water. The samples were then artificially aged at four different heating durations varying between 2 and 8 minutes using the induction system. As a result of examining the production time and cost of both methods, it was found that the heat treatment of 2024 Al samples by induction was much more advantageous. Furthermore, when Al samples were heated by induction, shape differences and main alloy elements significantly affected power consumption values. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.