Thermodynamic analysis of a solar-driven high-temperature steam electrolyzer for clean hydrogen production

He, Wei; Namar, Mohammad Mostafa; Li, Zhixiong; Maleki, Akbar; Tlili, Iskander; Shadloo, Mostafa Safdari

doi:10.1016/j.applthermaleng.2020.115152

Cited by 55 publications

(5 citation statements)

References 62 publications

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“…The present article reported the experimental evaluation of grinding approach and produced the surface and subsurface damages of optical glass BK7 by applying the cup diamond device for the first time [23][24][25][26][27][28][29][30]. The following achievements could be presented:…”

Section: Discussionmentioning

confidence: 94%

A new monitor model to detect damages in surface and subsurface during cup grinding process of BK7 optical glass: a new optimization model for energy damage

Barahimi

Farahnakian

et al. 2020

J Therm Anal Calorim

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Grinding is known as the most widely used method of forming borosilicate optical glass (BK7). Due to the brittle nature of the BK7 glass, the predominant mechanism of material removal will be fracture. So, the surface under grinding will have surface (surface roughness) and subsurface damage. These damages will cause a decrease in mechanical resistance and performance. Modeling of surface and subsurface damages due to the grinding process using cup grinding tool has not been subjected in recent investigations. To do this, the surface roughness effects are investigated by changes in grinding parameters such as cutting speed, feed rate, cutting depth and table speed. Moreover, based on the experiments, the relationship between surface roughness and grinding parameters is simulated and the average error was 5.77%. In the second phase of the experiments, angular polishing method is used and subsurface morphologies are investigated by SEM and the depths of these damages are measured. Experimental results are compared with that of the Li theoretical model. Based on the results, the experimental and theoretical results have well consistency. In the end, based on the Li model, a new model based on the relationship between subsurface damage and grinding parameters is conducted.

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Section: Discussionmentioning

confidence: 94%

A new monitor model to detect damages in surface and subsurface during cup grinding process of BK7 optical glass: a new optimization model for energy damage

Barahimi

Farahnakian

et al. 2020

J Therm Anal Calorim

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“…However, the hydrogen production cost, about USD 3.5 kg −1 for a biomass price of USD 100 tons −1 , is still too high to represent a real alternative to steam reforming [14]. Solar energy is also another sustainable and environmentally friendly way to produce hydrogen [15][16][17][18]. Solar-driven high-temperature steam electrolyzers were found to produce pure hydrogen with a rate of 1.2 g s −1 , with an efficiency of around 25% [16].…”

Section: Hydrogen As a Fuelmentioning

confidence: 99%

“…Solar energy is also another sustainable and environmentally friendly way to produce hydrogen [15][16][17][18]. Solar-driven high-temperature steam electrolyzers were found to produce pure hydrogen with a rate of 1.2 g s −1 , with an efficiency of around 25% [16]. Renewable hydrogen can also be generated by solar-driven water splitting.…”

Section: Hydrogen As a Fuelmentioning

confidence: 99%

Towards Non-Mechanical Hybrid Hydrogen Compression for Decentralized Hydrogen Facilities

et al. 2020

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The cost of the hydrogen value chain needs to be reduced to allow the widespread development of hydrogen applications. Mechanical compressors, widely used for compressing hydrogen to date, account for more than 50% of the CAPEX (capital expenditure) in a hydrogen refueling station. Moreover, mechanical compressors have several disadvantages, such as the presence of many moving parts, hydrogen embrittlement, and high consumption of energy. Non-mechanical hydrogen compressors have proven to be a valid alternative to mechanical compressors. Among these, electrochemical compressors allow isothermal, and therefore highly efficient, compression of hydrogen. On the other hand, adsorption-desorption compressors allow hydrogen to be compressed through cooling/heating cycles using highly microporous materials as hydrogen adsorbents. A non-mechanical hybrid hydrogen compressor, consisting of a first electrochemical stage followed by a second stage driven by adsorption-desorption of hydrogen on activated carbons, allows hydrogen to be produced at 70 MPa, a value currently required for the development of hydrogen automotive applications. This system has several advantages over mechanical compressors, such as the absence of moving parts and high compactness. Its use in decentralized hydrogen facilities, such as hydrogen refueling stations, can be considered.

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“…Some investigators analyzed the effect of using different fins to enhance the equipment efficiency. Many academics have regarded solar energy as one of the possible renewable energy sources [14][15][16][17][18]. One of the most important energy consumers is in buildings, where the researchers have aimed to reduce their energy consumption [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Hole Size of Trombe Wall in the Presence of Phase Change Material for Different Times of a Day in Winter and Summer

et al. 2021

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In this article, a numerical study is performed on a Trobme wall in a tropical city for two seasons, summer and winter. A 1×1.5 m Trobme wall with a thickness of 15 cm is designed and analyzed. A 1-inch-diameter tube filled with PCM is used to enhance efficiency. The wall is analyzed at different times of the day for the two cold and hot seasons for different sizes of wall holes in the range of 70 to 17.5 cm when the wall height is 20 cm. A fluid simulation software is employed for the simulations. The problem variables include different hours of the day in the two cold and hot seasons, the presence or absence of PCM, as well as the size of the wall hole. The results of this simulation demonstrate that the maximum outlet temperature of the Trobme wall occurs at 2 P.M. Using PCM on the wall can allow the wall to operate for longer hours in the afternoon. However, the use of PCM reduces the outlet wall temperature in the morning. The smaller the size of the wall hole, the more air can be expelled from the wall.

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Thermodynamic analysis of a solar-driven high-temperature steam electrolyzer for clean hydrogen production

Cited by 55 publications

References 62 publications

A new monitor model to detect damages in surface and subsurface during cup grinding process of BK7 optical glass: a new optimization model for energy damage

A new monitor model to detect damages in surface and subsurface during cup grinding process of BK7 optical glass: a new optimization model for energy damage

Towards Non-Mechanical Hybrid Hydrogen Compression for Decentralized Hydrogen Facilities

Study on the Effect of Hole Size of Trombe Wall in the Presence of Phase Change Material for Different Times of a Day in Winter and Summer

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