A daily freshwater production of 50 m3/ton of silica gel using an adsorption-ejector combination powered by low-grade heat

Ehab S. Ali; Ramy H. Mohammed; Ahmed Askalany

doi:10.1016/j.jclepro.2020.124494

A daily freshwater production of 50 m³/ton of silica gel using an adsorption-ejector combination powered by low-grade heat

Ehab S. Ali, Ramy H. Mohammed, Ahmed Askalany^*

^*Corresponding author for this work

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

34 Scopus citations

Abstract

Adsorption desalination system (ADS) is being considered to mitigate the gap between water demand and availability. This research work proposes a new integration between ADS and a liquid-vapor ejector to increase the freshwater productivity by many folds. Two different schemes are proposed. The first scheme is adopted for cooling applications (ACEJ), while the second one is mainly used for desalination applications (ADEJ). Besides, internal heat recovery is applied between the condenser and evaporator in the ADEJ cycle for further enhancement in the overall system performance. A numerical model is built to investigate the effectiveness of the two proposed configurations at various operating conditions. The present results are compared with those of the standalone adsorption cooling system (ACS) and ADS. ADEJ with heat recovery produce a specific daily freshwater of 52.67 m³/ton of silica gel using 95 °C desorption temperature. This value is higher than the one produced by the ADS by a factor of 5.0. Integrating an ejector to silica gel/water ADS achieves a COP of 1.47, which is higher than that of ADS by a factor of 2.7.

Original language	English
Article number	124494
Journal	Journal of Cleaner Production
Volume	282
DOIs	https://doi.org/10.1016/j.jclepro.2020.124494
State	Published - 1 Feb 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

Adsorption desalination
COP
Ejector
SCP
SDWP

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Environmental Science
Strategy and Management
Industrial and Manufacturing Engineering

UN SDGs

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

Access to Document

10.1016/j.jclepro.2020.124494

Cite this

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title = "A daily freshwater production of 50 m3/ton of silica gel using an adsorption-ejector combination powered by low-grade heat",

abstract = "Adsorption desalination system (ADS) is being considered to mitigate the gap between water demand and availability. This research work proposes a new integration between ADS and a liquid-vapor ejector to increase the freshwater productivity by many folds. Two different schemes are proposed. The first scheme is adopted for cooling applications (ACEJ), while the second one is mainly used for desalination applications (ADEJ). Besides, internal heat recovery is applied between the condenser and evaporator in the ADEJ cycle for further enhancement in the overall system performance. A numerical model is built to investigate the effectiveness of the two proposed configurations at various operating conditions. The present results are compared with those of the standalone adsorption cooling system (ACS) and ADS. ADEJ with heat recovery produce a specific daily freshwater of 52.67 m3/ton of silica gel using 95 °C desorption temperature. This value is higher than the one produced by the ADS by a factor of 5.0. Integrating an ejector to silica gel/water ADS achieves a COP of 1.47, which is higher than that of ADS by a factor of 2.7.",

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N2 - Adsorption desalination system (ADS) is being considered to mitigate the gap between water demand and availability. This research work proposes a new integration between ADS and a liquid-vapor ejector to increase the freshwater productivity by many folds. Two different schemes are proposed. The first scheme is adopted for cooling applications (ACEJ), while the second one is mainly used for desalination applications (ADEJ). Besides, internal heat recovery is applied between the condenser and evaporator in the ADEJ cycle for further enhancement in the overall system performance. A numerical model is built to investigate the effectiveness of the two proposed configurations at various operating conditions. The present results are compared with those of the standalone adsorption cooling system (ACS) and ADS. ADEJ with heat recovery produce a specific daily freshwater of 52.67 m3/ton of silica gel using 95 °C desorption temperature. This value is higher than the one produced by the ADS by a factor of 5.0. Integrating an ejector to silica gel/water ADS achieves a COP of 1.47, which is higher than that of ADS by a factor of 2.7.

AB - Adsorption desalination system (ADS) is being considered to mitigate the gap between water demand and availability. This research work proposes a new integration between ADS and a liquid-vapor ejector to increase the freshwater productivity by many folds. Two different schemes are proposed. The first scheme is adopted for cooling applications (ACEJ), while the second one is mainly used for desalination applications (ADEJ). Besides, internal heat recovery is applied between the condenser and evaporator in the ADEJ cycle for further enhancement in the overall system performance. A numerical model is built to investigate the effectiveness of the two proposed configurations at various operating conditions. The present results are compared with those of the standalone adsorption cooling system (ACS) and ADS. ADEJ with heat recovery produce a specific daily freshwater of 52.67 m3/ton of silica gel using 95 °C desorption temperature. This value is higher than the one produced by the ADS by a factor of 5.0. Integrating an ejector to silica gel/water ADS achieves a COP of 1.47, which is higher than that of ADS by a factor of 2.7.

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