An economic analysis of three hydrogen liquefaction systems

Syed, Mahaboobbasha

doi:10.1016/s0360-3199(97)00101-8

Cited by 77 publications

(45 citation statements)

References 4 publications

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“…Our results are based on many Refs. [13,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] and are graphically shown in Figs. 3-5.…”

Section: Economics Of Wind-h 2 Systems: Basic Assumptionsmentioning

confidence: 99%

Method for size optimisation of large wind–hydrogen systems with high penetration on power grids

et al. 2013

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“…Our results are based on many Refs. [13,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] and are graphically shown in Figs. 3-5.…”

Section: Economics Of Wind-h 2 Systems: Basic Assumptionsmentioning

confidence: 99%

Method for size optimisation of large wind–hydrogen systems with high penetration on power grids

et al. 2013

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“…3 The thermal flux in the other directions has been assumed negligible from a conservative point of view. 5.…”

Section: The Acceptability Envelope Physical Model For Metal Hydridesmentioning

confidence: 99%

“…Compression requires high pressures, on the order of 350-700 bar or higher, requiring a great amount of work [1,2]. In the case of liquefaction, high gravimetric densities are achieved at low pressures, but the process is even more expensive than pure compression due to the electric power required to cool the hydrogen to sufficiently low temperatures (approximately 20 K at 1 bar) [1,3] and the issue of continual boil with its reduction in efficiency must be addressed. The use of a media for storage permits hydrogen to be stored at relatively low pressures compared to compressed hydrogen storage, and requires far less electric power consumption than needed for liquefaction.…”

Section: Introductionmentioning

confidence: 99%

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Acceptability envelope for metal hydride-based hydrogen storage systems

Corgnale¹,

Hardy²,

Tamburello³

et al. 2012

International Journal of Hydrogen Energy

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The design and evaluation of media based hydrogen storage systems requires the use of detailed numerical models and experimental studies, with significant amount of time and monetary investment. Thus a scoping tool, referred to as the Acceptability Envelope, was developed to screen preliminary candidate media and storage vessel designs, identifying the range of chemical, physical and geometrical parameters for the coupled media and storage vessel system that allow it to meet performance targets. The model which underpins the analysis allows simplifying the storage system, thus resulting in one input-one output scheme, by grouping of selected quantities. SRNL-TR-2011-002112 highlighting the potential of storage systems, utilizing them, to achieve 40% of the 2010 DOE technical target. Results show that systems based on Li-Mg media have the best potential to attain these performance targets.

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“…The cost of hydrogen liquefaction depends primarily on the production rate and the system e$ciency (Syed et al, 1998). Increasing the production rate generally decreases the cost.…”

Section: Observations On System Economicsmentioning

confidence: 99%

Second law analysis of hydrogen liquefiers operating on the modified Collins cycle

Syed

Sherif

Везироглу

et al. 2001

Int. J. Energy Res.

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SUMMARYHydrogen liquefaction systems have been the subject of intense investigations for many years. Some established gas liquefaction systems, such as the precooled Linde}Hampson systems, are not used for hydrogen liquefaction in part because of their relatively low e$ciencies. Recently, more promising systems employing the modi"ed Collins cycle have been introduced. This paper reports on second law analyses of a hydrogen lique"er operating on the modi"ed Collins cycle. Two di!erent modi"cations employing the cycle in question were attempted: (1) a helium-refrigerated hydrogen liquefaction system and (2) a hydrogen-refrigerated hydrogen liquefaction system. Analyses were carried out in order to identify potential areas of development and e$ciency improvement. A computer code capable of computing system and component e$ciencies; exergy losses; and optimum number and operating conditions of compressors, expanders, aftercoolers, intercoolers, and Joule}Thomson valves was developed. Evaluation of the thermodynamic and transport properties of hydrogen at di!erent temperature levels was achieved by employing a hydrogen property code developed by researchers at the National Bureau of Standards (currently NIST). A parametric analysis was carried out and optimal decision rules pertaining to system component selection and design were reached. Economic analyses were also reported for both systems and indicated that the heliumrefrigerated hydrogen lique"er is more economically feasible than the hydrogen-refrigerated hydrogen lique"er.

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An economic analysis of three hydrogen liquefaction systems

Cited by 77 publications

References 4 publications

Method for size optimisation of large wind–hydrogen systems with high penetration on power grids

Method for size optimisation of large wind–hydrogen systems with high penetration on power grids

Acceptability envelope for metal hydride-based hydrogen storage systems

Second law analysis of hydrogen liquefiers operating on the modified Collins cycle

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