Reduction of the environmental impacts of the hydropower plant by microalgae cultivation and biodiesel production

Zahedi, Rahim; Ahmadi, Abolfazl; Gitifar, Siavash

doi:10.1016/j.jenvman.2021.114247

Cited by 33 publications

(15 citation statements)

References 34 publications

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“…Today, the height of wind towers reaches 70 m, thus that it can generate 1.5 megawatts of electricity. However, installing more powerful rotors in these facilities can significantly reduce the cost of electricity from this non-regulated source [29].…”

Section: Windmentioning

confidence: 99%

Strategic Study for Renewable Energy Policy, Optimizations and Sustainability in Iran

Zahedi

Ahmadi

2022

Sustainability

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The present article includes studies on the importance of addressing strategic issues in the field of general policies adopted and strategies for the development of renewable energy in Iran. Considering that energy is one of the determining indicators in economic development and the development and optimization of renewable energy can play an effective role in economic growth and protection of environmental conditions, this article tries to introduce the types of renewable energy and general principles. They point to the policies that ultimately determine the priority and necessity of using some of them for the country and explain why and how to use them. The general principles discussed in this article include the advantages, disadvantages, potentials, and, most importantly, comparative comparisons with two neighboring countries. The results of these studies show that despite Iran’s diverse potentials in the field of renewable energy, wind energy has a higher priority than other cases in terms of economic justification and market competition, and domestic production rates. Other renewable energy sources for power generation and grid connection are less of a priority for short- or medium-term investment. However, for non-grid use in the country, they can also be very useful in the short term. In general, Iran can be a hub for renewable energy.

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Section: Windmentioning

confidence: 99%

Strategic Study for Renewable Energy Policy, Optimizations and Sustainability in Iran

Zahedi

Ahmadi

2022

Sustainability

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“…Though most Southeast Asian nations are still reliant heavily on traditional energy for domestic needs, efforts have been made by the government to deal with the incrementing energy demands [34] . More currently, some governments respond to the rising pressures on energy demands for developing eco-friendly and sustainable energy sources [35] . The area in Southeast Asia is still stable in terms of energy since the present policy is utilized for stabilizing secure economic growth and energy.…”

Section: Datamentioning

confidence: 99%

Potential assessment of renewable energy resources and their power plant capacities in Iran

Ahmadi

2022

new n.a. exploit. and appl.

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Today, most developed and developing countries utilize renewable energy to meet their needs. The use of renewable energy prevents environmental pollution. A concern of the governments is to deal with environmental pollution. In this paper, the types of renewable energy used in electricity generation in Iran have been studied. Studies show that during the last 20 years, 1.5% of the amount of electricity produced in Iran is supplied by renewable energy. Iran also has a much greater potential for utilizing renewable energy. By 2020, Iran has a potential of 42000 MW use of renewable energies. However, the capacity of renewable power stations constructed in Iran is 800 MW. Different regions of Iran have high wind, solar and geothermal energy potential, which unfortunately has not been used enough to meet industrial needs.

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“…In the present study, the probability density distribution function B is used, which relates the average values of mass fraction of species, temperature, and mixture density to the variance of the mixture fraction. The form of the function B, which is a function of f2, is computed using equation ( 7) [22].…”

Section: 𝜕(𝑝𝑢mentioning

confidence: 99%

Numerical simulation of combustion of sulfide- biomass concentrate ingredients and contaminants in copper furnace smelting

Zahedi¹,

Shaghaghi²,

Tahooneh³

et al. 2022

fuen

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Co-firing biomass and fossil fuels in industrial furnaces is a suitable way to reduce the environmental impact of human activities with acceptable investment. In this paper, the results of numerical simulation co-firing of sulfide concentrate and three auxiliary fuels, including gasoil, kerosene, and sawdust biomass, are compared in the flash furnace copper smelting. For modeling of turbulent flow and combustion, RNG, k-ε model, and probability density function model (pdf) have been used, respectively. This study has been carried out to investigate the furnace temperature and combustion pollutants distribution. The numerical simulation results show that the flame temperature resulting from the combustion of diesel fuel and sawdust as auxiliary fuel is the highest and lowest, respectively. In biomass combustion, despite that the flame temperature is low, but the NOx mass fraction increases because there is nitrogen in the sawdust chemical composition. Also in sawdust combustion, the oxygen content is high, the SO2 and SO3 sulfur pollutants increase in the high temperatures regions of the furnace and the lower temperature of the auxiliary fuel burner, respectively. Because SO2 is formed at high temperatures (> 1273K), oxygen-rich and SO3 species are produced at relatively low temperatures with excess oxygen. The amount of CO emissions in sawdust combustion is much lower than the amount of combustion of diesel and oil. In the peak of the flash furnace for sawdust and diesel auxiliary fuels, the temperature is 2.29E+03 K, and the distribution of NOx, CO2, O2, SO2, and SO3 are 1.51E-04, 9.72E-02, 2.33E-03, 1.71E-01 and 2.45E-02 respectively.

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Reduction of the environmental impacts of the hydropower plant by microalgae cultivation and biodiesel production

Cited by 33 publications

References 34 publications

Strategic Study for Renewable Energy Policy, Optimizations and Sustainability in Iran

Strategic Study for Renewable Energy Policy, Optimizations and Sustainability in Iran

Potential assessment of renewable energy resources and their power plant capacities in Iran

Numerical simulation of combustion of sulfide- biomass concentrate ingredients and contaminants in copper furnace smelting

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