Parametric influence study of cryogenic hydrogen dispersion on theoretical aspect

Shao, Xiangyu; Pu, Liang; Tang, Xin; Yang, Shenyin; Lei, Gang; Li, Yanzhong

doi:10.1016/j.ijhydene.2020.05.055

Cited by 12 publications

(6 citation statements)

References 21 publications

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“…The steam supply parameters are 2.5 bar and 165 • C. The latent heat to convert liquid water into vapor water is 2501 kJ/kg [33]. Liquefied petroleum gas has a calorific value of 11,082 kcal/kJ [34].…”

Section: Economic Assessmentmentioning

confidence: 99%

Circular Economy Approach on Energy Cogeneration in Petroleum Refining

et al. 2022

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The heat recovery of hot exhaust air in petroleum refining for energy cogeneration is a circular strategy to reduce costs and environmental impact. Despite several articles on this subject, there is a lack of study on the assessment of the economic and environmental advantages of energy cogeneration in petroleum refining. The objective of this research was to evaluate the economic and environmental gains obtained by energy cogeneration from the heat dissipated in the calcination of green petroleum coke. The research method was a case study in a petrochemical industry in Brazil. From an economic point of view, the cogeneration unit project has shown positive results: a discounted payback period of eight years and nine months, net present value (NPV) over a span of a twenty-year period of US$43,825,592, a return on investment (ROI) estimated to be 14%, and an internal rate of return (IRR) of 12%. From an ecological perspective, the produced energy in the cogeneration process reduced 163,992 ton CO2eq per year of greenhouse gas emissions into the atmosphere. This study has increased the knowledge of heat recovery in energy cogeneration in petroleum refining. This work contributes by providing some advantages of heat recovery as a circular economy strategy for business development.

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Section: Economic Assessmentmentioning

confidence: 99%

Circular Economy Approach on Energy Cogeneration in Petroleum Refining

et al. 2022

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“…T is the temperature of the mixture cloud at time j, 0 air T is the initial ambient air temperature, 0 P is the In our previous study [10], a calculation model based on adiabatic mixing theory for deriving cryogenic gas concentration was presented. To use the model in an engineering application, the authors conducted a real-time monitoring platform R&D program of cryogenic hydrogen detection.…”

Section: Dew Point Calculationmentioning

confidence: 99%

“…Moreover, in the latest experimental program of HSL [8], cryogenic hydrogen gas was extracted remotely from the sampling point through a pneumatic tube for analysis by the sensor. Besides this, two adiabatic mixing models have been respectively developed by Venetsanos et al [9] and Shao et al [10] Processes 2022, 10, 2521 2 of 8 in recent years, giving us a temporary solution to cryogenic hydrogen detection based on experimental temperature data. many engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Water Vapor Density in Adiabatic Mixing of Cryogenic Gas and Moist Air

et al. 2022

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Concentration distribution is essential for the emergency disposal of cryogenic fuel leakage. In the dispersion process of cryogenic gas, its concentration is greatly influenced by the atmospheric water vapor. The authors have presented an adiabatic mixing model to derive the concentration of the cryogenic gas, in which the value of water vapor density is obtained by referring to the NIST database continuously. However, it is difficult to achieve fast system response times for real-time monitoring systems when calling NIST. Thus, a simple algebraic model of water vapor density with high calculation efficiency is necessary. Based on the detection of temperature and the solution of water vapor partial pressure, a calculation model was developed. For a given initial ambient temperature and relative humidity, the dew point could be solved by Qian’s correlation. By temperature comparisons of the mixture cloud, dew point, and triple point, the water vapor partial pressure can be calculated by the Goff–Gratch formulation. Then, the water vapor density during the temperature declining process can be derived via EOS. The results show that the model has high estimation accuracy, and has a close mean deviationof 0.08%to the IAPWS 95 of 0.03%. The increase in the computation efficiency was confirmed as +67% under nine testing points. The model facilitates the engineering utilization of the adiabatic mixing model for cryogenic fuel leakage monitoring.

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“…Verfondern et al [9] conducted liquid hydrogen pool spread experiments on the surface of water and solid ground. Due to the huge cost and the safety issues related to the experiment, many researchers also investigated the leakage and dispersion of liquid hydrogen numerically [10][11][12][13][14][15][16][17][18][19][20][21], which revealed the underlying mechanisms and the effects of various conditions, such as spill source, season, wind flow, air humidity, etc.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Analysis of the Flow Characteristics of Liquid Hydrogen in a Pipe Suffering from External Transient Impact

Liu

Qiu²,

et al. 2022

Energies

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Pipes can be subjected to external transient impacts such as accidental collision, which affects the safe operation of storage and transportation systems for liquid hydrogen. Fluid–structure coupling calculation for a pipe under external transient impact is performed, and the flow characteristics of liquid hydrogen in the pipe are analyzed. The pipe deforms and vibrates when suffering from external transient impact. Liquid hydrogen pressure in a cross-section plane increases along the pipe deformation direction. Additionally, external transient impact enhances the disturbance of liquid hydrogen near the pipe wall. The increased flow resistance and the energy induced by the deformed pipe both affect the flow of liquid hydrogen, and contribute to the fluctuated characteristics of liquid pressure drop. In addition, the phase state of liquid hydrogen remains unchanged in the pipe, indicating that little of the induced energy is transformed into the internal energy of liquid hydrogen. The work provides theoretical guidance for the safe operation of liquid hydrogen storage and transportation systems.

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Parametric influence study of cryogenic hydrogen dispersion on theoretical aspect

Cited by 12 publications

References 21 publications

Circular Economy Approach on Energy Cogeneration in Petroleum Refining

Circular Economy Approach on Energy Cogeneration in Petroleum Refining

Estimation of Water Vapor Density in Adiabatic Mixing of Cryogenic Gas and Moist Air

Modeling and Analysis of the Flow Characteristics of Liquid Hydrogen in a Pipe Suffering from External Transient Impact

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