Adsorption desalination : an emerging low-cost thermal desalination method
Desalination, other than the natural water cycle, is hailed as the panacea to alleviate the problems of fresh water shortage in many water stressed countries. However, the main drawback of conventional desalination methods is that they are energy intensive. In many instances, they consumed electrici...
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sg-ntu-dr.10356-967262020-03-07T13:19:21Z Adsorption desalination : an emerging low-cost thermal desalination method Ng, Kim Choon Thu, Kyaw Kim, Youngdeuk Chakraborty, Anutosh Amy, Gary School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering Desalination, other than the natural water cycle, is hailed as the panacea to alleviate the problems of fresh water shortage in many water stressed countries. However, the main drawback of conventional desalination methods is that they are energy intensive. In many instances, they consumed electricity, chemicals for pre- and post-treatment of water. For each kWh of energy consumed, there is an unavoidable emission of Carbon Dioxide (CO2) at the power stations as well as the discharge of chemically-laden brine into the environment. Thus, there is a motivation to find new direction or methods of desalination that consumed less chemicals, thermal energy and electricity. This paper describes an emerging and yet low cost method of desalination that employs only low-temperature waste heat, which is available in abundance from either the renewable energy sources or exhaust of industrial processes. With only one heat input, the Adsorption Desalination (AD) cycle produces two useful effects, i.e., high grade potable water and cooling. In this article, a brief literature review, the theoretical framework for adsorption thermodynamics, a lumped-parameter model and the experimental tests for a wide range of operational conditions on the basic and the hybrid AD cycles are discussed. Predictions from the model are validated with measured performances from two pilot plants, i.e., a basic AD and the advanced AD cycles. The energetic efficiency of AD cycles has been compared against the conventional desalination methods. Owing to the unique features of AD cycle, i.e., the simultaneous production of dual useful effects, it is proposed that the life cycle cost (LCC) of AD is evaluated against the LCC of combined machines that are needed to deliver the same quantities of useful effects using a unified unit of $/MWh. In closing, an ideal desalination system with zero emission of CO2 is presented where geo-thermal heat is employed for powering a temperature-cascaded cogeneration plant. 2013-12-05T03:21:39Z 2019-12-06T19:34:18Z 2013-12-05T03:21:39Z 2019-12-06T19:34:18Z 2013 2013 Journal Article Ng, K. C., Thu, K., Kim, Y., Chakraborty, A., & Amy, G. (2013). Adsorption desalination : An emerging low-cost thermal desalination method. Desalination, 308, 161-179. 0011-9164 https://hdl.handle.net/10356/96726 http://hdl.handle.net/10220/18076 10.1016/j.desal.2012.07.030 en Desalination |
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DRNTU::Engineering::Mechanical engineering Ng, Kim Choon Thu, Kyaw Kim, Youngdeuk Chakraborty, Anutosh Amy, Gary Adsorption desalination : an emerging low-cost thermal desalination method |
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Desalination, other than the natural water cycle, is hailed as the panacea to alleviate the problems of fresh water shortage in many water stressed countries. However, the main drawback of conventional desalination methods is that they are energy intensive. In many instances, they consumed electricity, chemicals for pre- and post-treatment of water. For each kWh of energy consumed, there is an unavoidable emission of Carbon Dioxide (CO2) at the power stations as well as the discharge of chemically-laden brine into the environment. Thus, there is a motivation to find new direction or methods of desalination that consumed less chemicals, thermal energy and electricity.
This paper describes an emerging and yet low cost method of desalination that employs only low-temperature waste heat, which is available in abundance from either the renewable energy sources or exhaust of industrial processes. With only one heat input, the Adsorption Desalination (AD) cycle produces two useful effects, i.e., high grade potable water and cooling. In this article, a brief literature review, the theoretical framework for adsorption thermodynamics, a lumped-parameter model and the experimental tests for a wide range of operational conditions on the basic and the hybrid AD cycles are discussed. Predictions from the model are validated with measured performances from two pilot plants, i.e., a basic AD and the advanced AD cycles. The energetic efficiency of AD cycles has been compared against the conventional desalination methods. Owing to the unique features of AD cycle, i.e., the simultaneous production of dual useful effects, it is proposed that the life cycle cost (LCC) of AD is evaluated against the LCC of combined machines that are needed to deliver the same quantities of useful effects using a unified unit of $/MWh. In closing, an ideal desalination system with zero emission of CO2 is presented where geo-thermal heat is employed for powering a temperature-cascaded cogeneration plant. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Ng, Kim Choon Thu, Kyaw Kim, Youngdeuk Chakraborty, Anutosh Amy, Gary |
format |
Article |
author |
Ng, Kim Choon Thu, Kyaw Kim, Youngdeuk Chakraborty, Anutosh Amy, Gary |
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Ng, Kim Choon |
title |
Adsorption desalination : an emerging low-cost thermal desalination method |
title_short |
Adsorption desalination : an emerging low-cost thermal desalination method |
title_full |
Adsorption desalination : an emerging low-cost thermal desalination method |
title_fullStr |
Adsorption desalination : an emerging low-cost thermal desalination method |
title_full_unstemmed |
Adsorption desalination : an emerging low-cost thermal desalination method |
title_sort |
adsorption desalination : an emerging low-cost thermal desalination method |
publishDate |
2013 |
url |
https://hdl.handle.net/10356/96726 http://hdl.handle.net/10220/18076 |
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1681048310956163072 |