Activated carbon-carbon dioxide based two stage adsorption compression Brayton cycle power generation

Srinivasan, Kandadai and Dutta, Pradip (2019) Activated carbon-carbon dioxide based two stage adsorption compression Brayton cycle power generation. In: ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 25 (8). pp. 1663-1672.

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Abstract

Enhancement of energy delivery of a carbon dioxide (CO2) Brayton cycle without compression work liability is achievable using low grade heat for thermal compression. The limitation of the expansion ratios of a single stage adsorption thermal compression is obviated by opting for pressure build up in two stages. Despite the use of a large number of adsorbers, it is shown that, specific work output can be augmented substantially with no undue penalty on the overall cycle efficiency albeit with a marginal shortfall in work output per unit mass of adsorbent. These features are elucidated through an activated carbon based thermal compression of CO2 yet limiting high side pressures to 80 bar and the principal heat source at a temperature equal to or less than 300 degrees C in tandem with another low grade source at 100 degrees C for thermal compression. The net outcome is a substantial reduction in the size of the power block and heat exchangers resulting from enhancement of the expansion ratio and reduction in the mass flow rate in the circuit.

Item Type:	Journal Article
Publication:	ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
Publisher:	SPRINGER
Additional Information:	Copyright of this article belongs to SPRINGER
Keywords:	Brayton cycle; Thermal compression; Adsorption; Carbon dioxide
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	24 Dec 2019 10:29
Last Modified:	24 Dec 2019 10:29
URI:	http://eprints.iisc.ac.in/id/eprint/64210

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