ABSTRACT
The energy supply of healthcare facilities is of great importance under different circumstances. In this study, supplying the energy of a clinic using maximum renewable resources under normal and crisis conditions is examined. This paper is novel in that it designs an energy system specifically for times of crisis. The proposed clinic is located in two different regions in Iran. This paper considers a solar panel, wind turbine, battery, inverter, and controller for electricity generation from renewable resources, a steam boiler for heating needs, and a diesel generator as a backup system. Scenarios, including changes in the type of controller and the price of different parts, were examined. In the optimal scenario, where the clinic is in normal conditions in terms of patient acceptance, the net present cost and cost of energy were estimated to be $2.57 million and 0.0606 $/kWh for Rasht, and $3.09 million and 0.0732 $/kWh for Shiraz, respectively. In a new scenario, in a critical time of the COVID-19 outbreak, the net present cost and cost of energy were calculated to be $4.29 million and 0.0608$/kWh for Rasht, and $5.31 million and 0.0755 $/kWh for Shiraz, respectively. Also the clinic will generate an annual income of $0.12 million by selling excess energy produced in this scenario during normal conditions. © 2023 The Author(s)
ABSTRACT
Energy crisis and increasing rigorous management standards pose significant challenges for solid waste management worldwide. Several emerging diseases such as COVID-19 aggravated the already complex solid waste management crisis, especially sewage sludge and food waste streams, because of the increasingly large production year by year. As mature waste disposal technologies, landfills, incineration, composting, and some other methods are widespread for solid wastes management. This paper reviews recent advances in key sewage sludge disposal technologies. These include incineration, anaerobic digestion, and valuable products oriented-conversion. Food waste disposal technologies comprised of thermal treatment, fermentation, value-added product conversion, and composting have also been described. The hot topic and dominant research foci of each area are summarized, simultaneously compared with conventional technologies in terms of organic matter degradation or conversion performance, energy generation, and renewable resources production. Future perspectives of each technology that include issues not well understood and predicted challenges are discussed with a positive effect on the full-scale implementation of the discussed disposal methods. © 2022 Elsevier Ltd
ABSTRACT
In the present paper, a forecasting study on the monthly electricity generation of Türkiye from the conventional and renewable resources is performed. The effect of the CoVid-19 pandemic on the sector has been considered. For this aim, the trend before the pandemic has been initially considered and later the post-pandemic situation has been handled. It has been observed that the electricity generation supply/demand mechanism changes drastically compared to the pre- and post-pandemic cases. The rate of the generation from the renewable resources especially shows a sharp variation compared to the rates from the fossil fuels. According to the forecasting scenario, in 2021, the electricity generation shows different attitudes with regard to the resources used. In 2022, especially increasing trends are expected for wind, biogas, natural gas, imported coal and fuel oil, whereas diesel and mineral coal are expected to be decreased in Türkiye. © 2022 Published by peer-reviewed open access scientific journal, JES at DergiPark.
ABSTRACT
Optimizing the configuration of a microgrid allows to reduce energy losses and costs. Due to the new demand profile that emerged with the covid-19 pandemic with remote work, it is important to study its impact on the dimensioning of a microgrid, as well as the way in which renewable resources are distributed and dimensioned, in order to promote its use. Thus, this paper aims to propose the optimal configuration of distributed energy resources that meet two scenarios, pre-pandemic and post-pandemic, of electricity demand in a household in Salvador, Brazil. Therefore, an optimization problem was formulated in GAMS using environmental data and electricity demand, as well as the costs involved in the implementation and operation of the system, considering the resources of solar, wind and biogas energy. There was a change in the post-pandemic scenario, with the tendency to increase the use of solar energy, due to the demand being distributed throughout the day. It was observed for both scenarios that biogas energy had the greatest participation in domestic energy generation, followed by solar and wind energy. Therefore, the use of biogas in combination with other renewable resources can minimize costs and, at the same time, meeting the energy demand of a residence. In addition, this contributes to the environmental and economic sustainability of the region, as consumers begin to produce their own energy using renewable resources. © 2021 IEEE