Conceptualization and analysis of a novel combined sorption and phase-change material thermal storage system

Srinivas Garimella; Khoudor Keniar; Alexander S. Rattner; Girish Kini

doi:10.1016/j.est.2020.101745

Conceptualization and analysis of a novel combined sorption and phase-change material thermal storage system

Srinivas Garimella, Khoudor Keniar, Alexander S. Rattner, Girish Kini

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A new sorption-based thermal storage cycle is proposed. Energy is stored chemically by separating the constituents of highly non-ideal solutions, yielding much lower stand-by losses than in conventional approaches. The cycle avoids limitations of previously proposed sorption-based storage cycles by using a liquid-liquid mixer, and does not require a thermal source during discharge. A criterion based on a second law analysis is developed to evaluate potential working fluids for the cycle. Different cycle configurations are analyzed. An enhanced combined sorption and phase-change material (PCM) cycle is also investigated and compared with conventional thermal storage systems. For delivering 100 GJ of energy after 8 months, the combined cycle has an efficiency of 11% and lower storage volumes (down to 0.1 ×) than conventional thermal storage technologies. The energy density of the combined sorption-PCM system is 30 kWh m ⁻ ³.

Original language	English (US)
Article number	101745
Journal	Journal of Energy Storage
Volume	32
DOIs	https://doi.org/10.1016/j.est.2020.101745
State	Published - Dec 2020

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.est.2020.101745

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title = "Conceptualization and analysis of a novel combined sorption and phase-change material thermal storage system",

abstract = "A new sorption-based thermal storage cycle is proposed. Energy is stored chemically by separating the constituents of highly non-ideal solutions, yielding much lower stand-by losses than in conventional approaches. The cycle avoids limitations of previously proposed sorption-based storage cycles by using a liquid-liquid mixer, and does not require a thermal source during discharge. A criterion based on a second law analysis is developed to evaluate potential working fluids for the cycle. Different cycle configurations are analyzed. An enhanced combined sorption and phase-change material (PCM) cycle is also investigated and compared with conventional thermal storage systems. For delivering 100 GJ of energy after 8 months, the combined cycle has an efficiency of 11% and lower storage volumes (down to 0.1 ×) than conventional thermal storage technologies. The energy density of the combined sorption-PCM system is 30 kWh m − 3.",

author = "Srinivas Garimella and Khoudor Keniar and Rattner, {Alexander S.} and Girish Kini",

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AU - Garimella, Srinivas

AU - Keniar, Khoudor

AU - Rattner, Alexander S.

AU - Kini, Girish

PY - 2020/12

Y1 - 2020/12

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AB - A new sorption-based thermal storage cycle is proposed. Energy is stored chemically by separating the constituents of highly non-ideal solutions, yielding much lower stand-by losses than in conventional approaches. The cycle avoids limitations of previously proposed sorption-based storage cycles by using a liquid-liquid mixer, and does not require a thermal source during discharge. A criterion based on a second law analysis is developed to evaluate potential working fluids for the cycle. Different cycle configurations are analyzed. An enhanced combined sorption and phase-change material (PCM) cycle is also investigated and compared with conventional thermal storage systems. For delivering 100 GJ of energy after 8 months, the combined cycle has an efficiency of 11% and lower storage volumes (down to 0.1 ×) than conventional thermal storage technologies. The energy density of the combined sorption-PCM system is 30 kWh m − 3.

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Conceptualization and analysis of a novel combined sorption and phase-change material thermal storage system

Abstract

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