Uninterrupted renewable power through chemical storage cycles

Gençer, Emre; Al‐musleh, Easa I.; Mallapragada, Dharik S.

doi:10.1016/j.coche.2014.04.001

Cited by 16 publications

(9 citation statements)

References 15 publications

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“…The intermittency associated with solar and wind energy can be addressed on the process scale by developing chemical storage systems 104,105 or macroscale in integrated fossil/nonfossil supply chain systems. 106 The macroscale systems of this type generally consist of a solar, wind, and fossil fuel component for design, simulation, and optimization purposes.…”

Section: Solar and Windmentioning

confidence: 99%

Multi‐scale systems engineering for energy and the environment: Challenges and opportunities

et al. 2016

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Section: Solar and Windmentioning

confidence: 99%

Multi‐scale systems engineering for energy and the environment: Challenges and opportunities

et al. 2016

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“…The DME storage cycle shown in Figure 6, is a closed loop storage cycle that consists of cyclic transformation of DME molecule and carbon dioxide. The analysis has been performed for a solar energy storage system with the assumptions that solar energy is available as heat and as electricity for one-fifth of the day (4.8 hours), and that during the storage mode, the process produces sufficient amount of DME to supply ~140MW of electric power for 19.2 hours of the delivery mode (Gençer et al, 2014a). The DME storage cycle consists of a storage mode (when solar energy is available) and a delivery mode (when solar energy is not available).…”

Section: Example Carbon Storage Cycle: Dme Storage Cyclementioning

confidence: 99%

A commentary on the US policies for efficient large scale renewable energy storage systems: Focus on carbon storage cycles

Gençer

2016

Energy Policy

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The inevitable depletion of fossil resources and increasing atmospheric greenhouse gas concentrations demonstrate the need for renewable energy conversion technologies for a sustainable economy. Intermittencies and variability in availability of renewable energy sources are the challenges for uninterrupted energy supply, which can be overcome by large scale energy storage facilities. Pumped hydroelectric energy storage is an efficient but a very low energy density energy storage method that dominates the current energy storage market with ~ 96% share. We first present a recently developed potential solution for large scale efficient and dense energy storage: closed loop carbon storage cycles and a specific example dimethyl ether storage cycle. We then discuss the relevant US energy storage regulations, policy initiatives, their status, and potential modifications that will contribute to the invention and implementation of novel energy storage systems.

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“…Another feature of the concept is the liquefaction of the carbon dioxide and methane to minimize the volume and eliminate the difficulties associated with high-pressure storage of large quantity of gases. The suitability of other carbonbased molecules has also been investigated for the proposed cycle concept, of which methanol (Al-musleh et al, 2013) and dimethyl ether (Gencer et al, 2014) are identified as favourable alternatives. In this paper we present the details of the steady simulation of the proposed Methane-cycle, with a particular emphasis on the storage mode operation, where renewable energy is stored as liquid methane.…”

Section: Introductionmentioning

confidence: 99%

Continuous baseload renewable power using chemical refrigeration cycles

Al‐musleh

Mallapragada

2014

Computers & Chemical Engineering

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We propose a cycle to store and supply GWh of electricity from intermittent renewable energy by transforming carbon atoms between carbon dioxide and methane. Among hydrocarbons, methane is associated with the highest energy content per mole of carbon. Therefore, for a given electricity supply, it requires the least amount of carbon circulation. To minimize storage volumes, both carbon dioxide and methane are stored as liquids. When renewable energy is available, methane is synthesized from vaporizing carbon dioxide, and subsequently purified, liquefied and stored. When renewable energy is unavailable, liquid methane is vaporized and oxidized for electricity supply. The produced carbon dioxide is purified and liquefied for storage and subsequent usage. In each case, the electricity required for purification and liquefaction is minimized by integrating the vaporization and liquefaction steps of carbon dioxide and methane. The cycle can achieve ~55% storage efficiency with much reduced storage volumes compared to other options.

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Uninterrupted renewable power through chemical storage cycles

Cited by 16 publications

References 15 publications

Multi‐scale systems engineering for energy and the environment: Challenges and opportunities

Multi‐scale systems engineering for energy and the environment: Challenges and opportunities

A commentary on the US policies for efficient large scale renewable energy storage systems: Focus on carbon storage cycles

Continuous baseload renewable power using chemical refrigeration cycles

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