Exergetic, exergo-economic, and exergo-environmental analyses of a trigeneration system driven by biomass and natural gas

Jalili, Mohammad; Ghasempour, Roghaye; Ahmadi, Mohammad Hossein; Chitsaz, Ata; Holagh, Shahriyar Ghazanfari

doi:10.1007/s10973-021-10813-3

Cited by 25 publications

(4 citation statements)

References 58 publications

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“…Consumption of individuals and families has increased dramatically following the spread of COVID-19 worldwide. The spread of COVID-19 heart disease has led to an increase in global demand for disinfectants, detergents, masks, and other health items [2,3]. The increase of these detergents and masks increases the pollution of water and wetlands and the environment and has adverse negative effects on living organisms [4].…”

Section: Introductionmentioning

confidence: 99%

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

et al. 2022

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In response to the COVID-19 pandemic, single-use disposable masks saw a dramatic rise in production. Facial masks that are not properly disposed of will expose the environment to a form of non-biodegradable plastic waste that will take hundreds of years to degrade. Therefore, recycling such waste in an eco-friendly manner is imperative. Fibered or shredded waste masks can be used to make green concrete that is an environmentally friendly solution to dispose the facial masks. This study prepared six classes of concrete samples, three of which contained fibers from masks and three of which contained shredded masks at the ages of seven days and 28 days. The results show that in the seven-day and 28-day samples, mask fiber added to the mixes resulted in increased compressive strength. For seven-day and 28-day samples, the compressive strength increased by 7.2% and 10%, respectively. Despite that, the results of the shredded mask addition to concrete indicate that the increase in shredded mask volume has a minor impact on the compressive strength of the seven-day samples. An increase in shredded mask from 0.75 to 1% increased 28-day compressive strength by 14%. However, the compressive strength of the mask fiber decreased by 8 after 1% volume. According to a thermal analysis of 28-day concrete samples, as the fiber percentage increases, the mass loss percentage increases. The mass loss rate for samples containing fibers is higher than that for samples containing shredded mask pieces. In general, based on the results mentioned above, the use of fiber in concrete in its fiber state enhances its strength properties. As a result, using shredded mask pieces in concrete leads to better curing due to the reduction of residual capillary pore water loss in construction materials.

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Section: Introductionmentioning

confidence: 99%

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

et al. 2022

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“…1 In addition, different kinds of difficulties and challenges must be considered in the development of microscale combustors, including the rise in thermal energy losses due to the larger surface region to volume proportion of the microscale combustor. 2,3 Microscale combustors, a required part of micropower generation frameworks, react and change the chemical energy of fuels in the thermal energy combustion process. Thus, research on microscale combustion devices with different conditions and steady as per formation limits has expanded.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the primary goal is to achieve a stable combustion process, as used in various types of industrial furnaces, gas turbine combustors, and boiler/evaporator furnaces as well as in microcombustion using computational fluid dynamics (CFD) 1 . In addition, different kinds of difficulties and challenges must be considered in the development of microscale combustors, including the rise in thermal energy losses due to the larger surface region to volume proportion of the microscale combustor 2,3 . Microscale combustors, a required part of micropower generation frameworks, react and change the chemical energy of fuels in the thermal energy combustion process.…”

Section: Introductionmentioning

confidence: 99%

Optimization of flame stabilization methods in the premixed microcombustion of hydrogen–air mixture

Jha

Velidi

Emani³

2022

Heat Trans

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The premixed combustion of a lean hydrogen–air mixture is analyzed in this study to examine various properties and flame stabilization. A two‐dimensional (2D) analysis of a microscale combustor is performed with various shapes of bluff bodies (e.g., circular and triangular). Nine bluff bodies are placed at the entrance of the microscale combustor and solved with 2D governing equations. The analysis is performed with the three velocities of 10, 20, and 30 m/s, but the equivalence ratio is fixed in all cases. The various characteristics of the microscale combustor are studied such as the temperature of the wall, difference in peak temperature, the mean velocity at the outlet, and temperature of the exhaust gases. Flame stabilization depends on various factors such as bluff body shape and size, and the velocity of the fuel–air mixture at the inlet and recirculation zone. In comparison to all bluff body cases, we observe that the wall blade bluff body is the most efficient (low exhaust gas temperature, large recirculation zone, low mean velocity at the outlet of the microcombustor, and high wall temperature) compared with all eight other bluff body cases. Combustion efficiency is directly proportional to the wall temperature, meaning that the microcombustor with wall blade bluff bodies is more efficient with a stabilized flame. The simulation results are compared with published data on an L/D ratio of 15.

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“…Over the last few decades, environmental concerns have evolved into a worldwide crisis, including linked groups, diverse businesses, and research initiatives [4,5]. Most energy issues, such as resources, demand, supply, and applications, have always been global issues.…”

Section: Introductionmentioning

confidence: 99%

Modeling and analysis of a two-stage ORC for recovering waste heat of single flash geothermal cycle

Aryanfar,

Akhsheej,

Ataei Sheykh

et al. 2021

CT&F Cienc. Tecnol. Futuro

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Reusing heat dissipation in thermodynamic cycles is an exciting proposal to increase efficiency. In this paper, a two-stage ORC (Organic Rankine Cycle) is proposed to recover and reuse wasted energy from an SFGC (Single Flash Geothermal Cycle). The working fluids studied for the recovery system include R227ea and R116 and R124 and R125. The effect of the main elements of system performance is investigated using sensitivity analyses. Exergy degradation of various components is also calculated. For working fluids R227ea and R116, the thermal efficiency improved by 7.66%, from 0.2023 to 0.2178. The system's thermal efficiency is improved from 0.2023 to 0.2177 by 7.61% using R124 and R125. The exergy efficiency of the initial working fluid improves by 15.04%, from 0.5044 to 0.5803. Further, the second pair of working fluids from 0.5044 to 0.5852, which indicates a 16.01% system efficiency improvement. 85% of the system exergy is eliminated through the expansion valve, turbine 3, heat exchanger 2, and mixer. Including the recovery phase in the base, SFGC will positively affect the power plant's performance.

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Exergetic, exergo-economic, and exergo-environmental analyses of a trigeneration system driven by biomass and natural gas

Cited by 25 publications

References 58 publications

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

An Environmentally Friendly Solution for Waste Facial Masks Recycled in Construction Materials

Optimization of flame stabilization methods in the premixed microcombustion of hydrogen–air mixture

Modeling and analysis of a two-stage ORC for recovering waste heat of single flash geothermal cycle

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