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Book ChapterDOI

Exergy Studies on a Hybrid Desalination and Cooling Plant

TL;DR: In this paper, the exergetic efficiency, exergy destruction of each component and desalinated water and gained out ratio (GOR) of an integrated two-stage humidification dehumidification (HDH) desalination with the cooling system were evaluated for different experimental conditions.
Abstract: This paper evaluates the exergy of an integrated two-stage humidification dehumidification (HDH) desalination with the cooling system. The exergy analysis was carried out for the experimental data generated from a laboratory level experimental setup. The experimental results were developed by varying hot water flow rate and its temperature to the humidifiers and air preheaters. The exergetic efficiency, exergy destruction of each component and desalinated water and gained out ratio (GOR) of the system are evaluated for different experimental conditions. The system performance was evaluated with hot water is supplied at 100,125,150,200 L per hour to humidifiers at different inlet temperatures. Atmospheric air is supplied at a flow rate of 15 cubic metre per hour and maintained it constant throughout the experiments. The desalination yield increases with an increase in water flow rate and its temperature, whereas the cooling effect is observed a decreasing trend. The exergy efficiency in air preheaters, humidifiers and dehumidifiers was observed to be 20–30%, 70–90%, and 30–60%, respectively. Total desalinated water yield of 1.2–1.9 kg per hour is obtained with a GOR of 0.7–1.6 is from the integrated system. Air cooling of 0.1–0.25 kW is observed from the system for the mentioned flow rate of air and hot saline water.
References
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Book
01 Jan 2007
TL;DR: In this article, the authors deal with exergy and its applications to various energy systems and applications as a potential tool for design, analysis and optimization, and its role in minimizing and/or eliminating environmental impacts and providing sustainable development.
Abstract: This book deals with exergy and its applications to various energy systems and applications as a potential tool for design, analysis and optimization, and its role in minimizing and/or eliminating environmental impacts and providing sustainable development. In this regard, several key topics ranging from the basics of the thermodynamic concepts to advanced exergy analysis techniques in a wide range of applications are covered as outlined in the contents. It provides comprehensive coverage of exergy and its applications. It connects exergy with three essential areas in terms of energy, environment and sustainable development. It presents the most up-to-date information in the area with recent developments. It provides a number of illustrative examples, practical applications, and case studies. It features an easy to follow style, starting from the basics to the advanced systems.

1,983 citations

Journal ArticleDOI
TL;DR: In this article, the authors analyzed the thermodynamic performance of various HDH cycles by way of a theoretical cycle analysis and proposed novel high-performance variations on those cycles, such as multi-extraction, multi-pressure and thermal vapor compression cycles.
Abstract: Humidification dehumidification desalination (HDH) is a promising technology for small-scale water production applications. There are several embodiments of this technology which have been investigated by researchers around the world. However, from a previous literature [1], we have found that no study carried out a detailed thermodynamic analysis in order to improve and/or optimize the system performance. In this paper, we analyze the thermodynamic performance of various HDH cycles by way of a theoretical cycle analysis. In addition, we propose novel high-performance variations on those cycles. These high-performance cycles include multi-extraction, multi-pressure and thermal vapor compression cycles. It is predicted that the systems based on these novel cycles will have gained-output ratio in excess of 5 and will outperform existing HDH systems.

250 citations

01 Dec 2009
TL;DR: In this paper, the authors analyzed the thermodynamic performance of various HDH cycles by way of a theoretical cycle analysis and proposed novel high-performance variations on those cycles, such as multi-extraction, multi-pressure and thermal vapor compression cycles.
Abstract: Humidification dehumidification desalination (HDH) is a promising technology for small-scale water production applications. There are several embodiments of this technology which have been investigated by researchers around the world. However, from a previous literature [1], we have found that no study carried out a detailed thermodynamic analysis in order to improve and/or optimize the system performance. In this paper, we analyze the thermodynamic performance of various HDH cycles by way of a theoretical cycle analysis. In addition, we propose novel high-performance variations on those cycles. These high-performance cycles include multi-extraction, multi-pressure and thermal vapor compression cycles. It is predicted that the systems based on these novel cycles will have gained-output ratio in excess of 5 and will outperform existing HDH systems.

206 citations

Journal ArticleDOI
TL;DR: In this article, a novel humidification-dehumidification (HDH ) solar desalination system is designed and tested with actual conditions and solar energy was used to provide both thermal and electrical energy.

159 citations

Book ChapterDOI
TL;DR: In this paper, a unified exergy-based structure that provides useful insights and direction to those involved in exergy, environment, and sustainable development for analyzing and addressing appropriately each of these areas using exergy concepts is presented.
Abstract: The relation between sustainable development and the use of resources, particularly energy resources, is of great significance to societies. Attaining sustainable development requires that sustainable energy resources be used, and is assisted if resources are used efficiently. Exergy methods are important since they are useful for improving efficiency. This chapter considers exergy as the confluence of energy, environment, and sustainable development. The basis for this treatment is the interdisciplinary character of exergy and its relation to each of these disciplines. The primary objective is to present a unified exergy-based structure that provides useful insights and direction to those involved in exergy, environment, and sustainable development for analyzing and addressing appropriately each of these areas using exergy concepts. Further, as energy policies increasingly play an important role in addressing sustainability issues and a broad range of local, regional, and global environmental concerns, policy makers also need to appreciate the exergy concept and its ties to these concerns. The exergy-related implications that assist in achieving sustainable development by providing insights into efficiency improvement and environmental-impact reduction are also discussed. These insights, combined with economics and other factors, can assist in improving the sustainability of the electricity generation process considered and the broader provision of electricity and electrical-related services in regions. The need to understand the linkages between exergy and energy, sustainable development, and environmental impact has become increasingly significant as it allows the problems to be better addressed and helps to develop solutions that are beneficial for the economy and society.

138 citations