عنوان	Energy, Economic, and Environmental (3E) Impacts Assessment of Low-grade Waste Heat Recovery in a Food Dryer Incorporating an Innovative Porous Al2O3 Core Heat Exchanger
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Energy, Environmental, Heat Exchanger
چکیده	This research focused on evaluating the effects on energy consumption, economic aspects, and environmental consequences associated with the utilization of low-grade waste heat recovery (WHR) within a small-scale food drying apparatus known as a laboratory-scale food dryer (LSFD). A regenerative heat exchanger comprising a porous Al2O3 core resistant to corrosion and rust is used for WHR. The operation duration of the LSFD was considered 10 hour/day, and 365 day/year. The emission intensity value of 506 gCO2/kWh was taken into account for fossil-fuel-based power generation. Investigations were conducted via the Taguchi optimization method in conjunction with cost-benefit analysis. Results indicated that WHR within LSFD can achieve energy savings ranging from 5.148 to 12.966 MWh/year with a saving efficiency of 26.32 %, leading to saving 219.54–552.88 USD2023/year with a payback period of 1.06–2.67 years and 848.36–2136.45 USD2023/year with a payback period of 0.27–0.69 years for the average (0.162 USD2023) and maximum (0.626 USD2023) electricity prices, respectively. This strategy prevents emitting the 2.61–6.56 tCO2/year with a mitigation rate of 112.98–284.53 kgCO2 with every 1 ℃ rise in temperature of preheated air. CO2 emission conversion factors were ultimately presented for diverse parameters.
پژوهشگران	بهنام عطاییان (نفر اول)، شهریار کوراوند (نفر دوم)، مجید رسولی (نفر سوم)