Performance of a novel-type of heat flue in a coke oven based on high-temperature and low-oxygen diffusion combustion technology

Xu, Qian; Zou, Zhenwei; Chen, Yushi; Wang, Kang; Du, Zhiwei; Feng, Jianmin; Ding, Chong; Bai, Ziqi; Zang, Yong; Xiong, Yaxuan

doi:10.1016/j.fuel.2020.117160

“…Furthermore, the wind HPS were more economical compared to PV HPS with 3-4 and 6-7 years of payback periods; respectively. Xu et al (2020a) showed that if coke oven gas is used as the fuel, the NOx concentration reduced by almost 35%. Xu et al (2020b) analyzed five types of nanofluids to obtain single and hybrid nanofluids with the best heat transfer performance.…”

Section: Hps Control Systems and Optimization Techniquesmentioning

confidence: 99%

“…Xu et al. (2020a) showed that if coke oven gas is used as the fuel, the NOx concentration reduced by almost 35%.…”

Section: A Statistical Overview Of the Existing Hps Around The Globementioning

confidence: 99%

Hybrid power systems – Sizes, efficiencies, and economics

Rehman

¹

2020

Energy Exploration & Exploitation

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In the context of electricity generation in the oil and gas producing countries, it has become implicit to develop new, clean, and renewable sources of energy to supplement the fossil fuel based power generation. With this single aim, one can hit two targets, conservation of fixed fossil fuel resources and combat the adverse climatic changes to safeguard our planet. In regional context, solar photovoltaic, solar thermal, wind power, geothermal, and hydro power are alternative sources for power mitigation. Of these renewables, wind, solar photovoltaic (PV), diesel, and energy storage in hybrid combinations are the possible ways to supply continuous energy for all sizes of applications. This paper provides a review of the existing hybrid power systems and the theoretical studies around the globe in varied climatological conditions to identify the best combinations of hybrid systems for Saudi Arabia to supplement the existing energy portfolio. The wind/solar-pv, wind/solar-pv/diesel, and solar-pv/diesel with and without battery backup are most commonly used systems with respective popularity of 28, 22, and 21%. Among users, remote communities are the highest while islands and communication towers are the next common applications. Average costs of energy of wind/solar-pv, wind/solar-pv/diesel, and solar-pv/diesel are around 0.458, 0.355, and 0.349 US$/kWh.

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“…Xu et al. (2019, 2020b) have stated that regenerative coke method is one of the ways of energy saving and environment protection to overcome this energy crisis. In these articles, they also discussed methods to lower NOx emissions so that less pollution can reduce the damage to the environment.…”

Section: Introductionmentioning

confidence: 99%

“…According to Panwar et al (2011), "renewable sources of energy are used to mitigate the greenhouse gas emissions and reduce global warming". Xu et al (2019Xu et al ( , 2020b have stated that regenerative coke method is one of the ways of energy saving and environment protection to overcome this energy crisis. In these articles, they also discussed methods to lower NOx emissions so that less pollution can reduce the damage to the environment.…”

Section: Introductionmentioning

confidence: 99%

Assessment of wind energy potential for Tuvalu with accurate estimation of Weibull parameters

Talama

¹

,

Kutty

²

,

Kumar

³

et al. 2020

Energy Exploration & Exploitation

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Wind resource assessments are carried out for two sites in Tuvalu: Funafuti and Nukufetau. The wind speeds at 34 and 20 m above ground level were recorded for approximately 12 months and analyzed. The averages of each site are computed as the overall, daily, monthly, annual, and seasonal averages. The overall average wind speeds for Funafuti and Nukufetau at 34 m above ground level were estimated to be 6.19 and 5.36 m/s, respectively. The turbulence intensities at the two sites were also analyzed. The turbulence intensity is also computed for windy and low-wind days. Wind shear analysis was carried out and correlated with temperature variation. Ten different methods: median and quartiles method, the empirical method of Lysen, the empirical method of Justus, the moments method, the least squares method, the maximum likelihood method, the modified maximum likelihood method, the energy pattern factor method, method of multi-objective moments, and the wind atlas analysis and application program method were used to find the Weibull parameters. From these methods, the best method is used to determine the wind power density for the site. The wind power density for Funafuti is 228.18 W/m2 and for Nukufetau is 145.1 W/m2. The site maps were digitized and with the WAsP software, five potential locations were selected for each site from the wind resource map. The annual energy production for the sites was computed using wind atlas analysis and application program to be 2921.34 and 1848.49 MWh. The payback periods of installing the turbines for each site are calculated by performing an economic analysis, which showed payback periods of between 3.13 and 4.21 years for Funafuti and between 4.83 to 6.72 years for Nukufetau.

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“…Prabhavathi et al 9 elaborated the boundary layer MHD heat and mass transfer flow over a vertical cone embedded in porous media filled with Al 2 O 3 -water and Cu-water nanofluid. Some other investigations towards the effect of single and multiple nanoparticles on the thermal conductivity, and heat transfer enhancement is given in [10][11][12][13][14][15][16][17][18][19] . The higher thermal conductivity improves the rate of heat transfer.…”

mentioning

confidence: 99%

Comparative study on heat transfer and friction drag in the flow of various hybrid nanofluids effected by aligned magnetic field and nonlinear radiation

Khan

¹

,

Li

²

,

Mao

³

et al. 2021

Sci Rep

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The key purpose of the existing article is to discuss the effects of various hybrid nanofluids and a simple nanofluid over the heat transfer and friction drags along a stretched surface. The various kinds of hybrid nanofluids and a simple nanofluid together with the effects of aligned magnetic field, nonlinear radiation and suction have been taken into consideration. These hybrid nanofluids are prepared by suspending a couple of distinct nanoparticles $$Cu$$ Cu and $$A{l}_{2}{O}_{3}$$ A l 2 O 3 into the base fluids $${H}_{2}O$$ H 2 O and $${C}_{2}{H}_{6}{O}_{2}$$ C 2 H 6 O 2 . The comparison of various graphical results of skin friction coefficient, rate of heat transfer, velocity and temperature for two different hybrid nanofluids $$Cu{-}A{l}_{2}{O}_{3}$$ C u - A l 2 O 3 /$${H}_{2}O$$ H 2 O , $$Cu{-}A{l}_{2}{O}_{3}$$ C u - A l 2 O 3 /$${H}_{2}O{-}{C}_{2}{H}_{6}{O}_{2}$$ H 2 O - C 2 H 6 O 2 and a simple nanofluid $$A{l}_{2}{O}_{3}$$ A l 2 O 3 /$${H}_{2}O$$ H 2 O is considered. Moreover, the impact of surface stretching, aligned magnetic field and thermal radiation over the velocity, temperature, skin friction coefficient and local Nusselt number are also considered. The outcomes drawn from this modern research is that the hybrid nanofluid $$Cu{-}A{l}_{2}{O}_{3}$$ C u - A l 2 O 3 /$${H}_{2}O{-}{C}_{2}{H}_{6}{O}_{2}$$ H 2 O - C 2 H 6 O 2 is quite effective in cooling and heating in comparison to the other hybrid nanofluids $$Cu{-}A{l}_{2}{O}_{3}$$ C u - A l 2 O 3 /$${H}_{2}O$$ H 2 O , $$Cu{-}A{l}_{2}{O}_{3}$$ C u - A l 2 O 3 /$${C}_{2}{H}_{6}{O}_{2}$$ C 2 H 6 O 2 and a simple nanofluid $$A{l}_{2}{O}_{3}/{H}_{2}O$$ A l 2 O 3 / H 2 O . Based on these findings we could say that the suspension of multiple particles in the composition of two or more base fluids provides a better rate of heat transfer and limits the friction drag.

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Performance of a novel-type of heat flue in a coke oven based on high-temperature and low-oxygen diffusion combustion technology

Cited by 93 publications

References 25 publications

Hybrid power systems – Sizes, efficiencies, and economics

Hybrid power systems – Sizes, efficiencies, and economics

Assessment of wind energy potential for Tuvalu with accurate estimation of Weibull parameters

Comparative study on heat transfer and friction drag in the flow of various hybrid nanofluids effected by aligned magnetic field and nonlinear radiation

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