Thermo-economic analysis of a water-heated humidification-dehumidification desalination system with waste heat recovery

He, Wei; Han, Dong; Zhu, Wenjun; Ji, Chunhui

doi:10.1016/j.enconman.2018.01.048

Cited by 64 publications

(7 citation statements)

References 26 publications

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“…There are many fundamental differences between this and the current work. The HDH system of reference [46] is driven from a waste heat whereas the system in the current work is driven from a solar energy source. Moreover, the concept of waste heat recovery is quite different in both works; where the current work is dedicated to the internal waste heat recovery; whereas, the work of reference [46] focuses on the desalination system delivered from a waste heat recovery unit.…”

Section: Chinamentioning

confidence: 99%

Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System

et al. 2020

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Water desalination presents a need to address the growing water-energy nexus. In this work, a literature survey is carried out, along an application of a mathematical model is presented to enhance the freshwater productivity rate of a solar-assisted humidification-dehumidification (HDH) type of desalination system. The prime novelty of this work is to recover the waste heat by reusing the feedwater at the exit of the condenser in the brackish water storage tank and to carry out the analysis of its effectiveness in terms of the system’s yearly thermoeconomics. The developed mathematical model for each of the components of the plant is solved through an iterative procedure. In a parametric study, the influence of mass flow rates (MFRs) of inlet air, saline water, feedwater, and air temperature on the freshwater productivity is shown with and without the waste heat recovery from the condensing coil. It is reported that the production rate of water is increased to a maximum of 15% by recovering the waste heat. Furthermore, yearly analysis has shown that the production rate of water is increased to a maximum of 16% for June in the location of Taxila, Pakistan. An analysis is also carried out on the economics of the proposed modification, which shows that the cost per litre of the desalinated water is reduced by ~13%. It is concluded that the water productivity of an HDH solar desalination plant can be significantly increased by recovering the waste heat from the condensing coil.

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Section: Chinamentioning

confidence: 99%

Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System

et al. 2020

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“…The optimum water production rate was 150.75 kg h -1, and GOR was about 8.12 for the proposed integrated system. He et al (2018) also carried out thermo-economic mathematical modelling with waste heat recovery. The unit cost of water production (UCWP) is decreased from $40.35 kg -1 h to $35.31 kg -1 h, with an increase in humidification effectiveness from 0.8 to 0.9.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Desalination of Salt Water Comprising Polypropylene Hollow Fibre Membranes

Elewa

Ramadan

El-Emam³

et al. 2023

Misr Journal of Agricultural Engineering

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The problem of desalination systems using advanced hollow fibre (HF) membranes were thoroughly investigated. Humidification air is cooled by heat transfer in the dehumidification chamber, which condenses the water vapour and produces high-quality, fresh drinking water. A mathematical approach was conducted, and a simulation programme (model) was developed for the system. The performance of the HF membranes was assessed using different mass flows of salt water and air to optimise the system's operating performance. An experimental setup was prepared to test the effect of changing the operating parameters on the produced fresh water's flux. The produced flux ranged from 2.36-10.6 kg h -1 m -2 at 40-70 o C, respectively. The comparisons between the simulation results and the experimental setup were in good agreement, and the water quality analysis showed that the obtained values were within the World Health Organization's drinking water guidelines.

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“…He et al 36 investigated HDH desalination system with waste heat recovery mathematically. The effect of the sprinkling temperature of seawater on thermoeconomic performance was also studied.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of two‐stage humidification‐dehumidification desalination system integrated with an innovative oxy‐hydrogen ( HHO ) system

et al. 2021

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The current research experimentally investigated a sustainable desalination method to maximize freshwater production at minimal costs. Solar photovoltaics are used as a source of clean and renewable energy. The system used in conducting the experiments consists of: an air heater, water heater, two stages of cross-flow humidification, two stages of cross-flow dehumidification, and an oxyhydrogen gas generator. The setup's working principle is the open-air and closed water cycle. A centrifugal fan blows the ambient air to pass through the air heater. Air is heated through a heat exchanger, which is consequently heated by hot water. Water is heated using a new heating approach by using a mixture of 20% natural gas and 80% hydrogen gas with less impact on environmental pollution. Air is then humidified through two-stage humidification systems using a high water temperature technique, then through the innovative vibrating plate circuit, respectively. The humidified air is condensed through two consecutive dehumidification heat exchangers. The system parameters are optimized to enhance freshwater productivity. The studied operative parameters are air mass flow rate, water mass ratio (WMR), and the effect of adding a second stage of humidification. The results showed that the maximum daily productivity is 49.3 kg/day. The optimum air mass flow rate and water mass ratio to obtain maximum productivity was found to be 0.375 kg/s and 0.6, respectively. Furthermore, the experiments' results showed that two-stage humidification enhanced freshwater productivity by 23.25% than that of the single stage of humidification. Finally, an economical study analysis conducted for the test rig showed the cost per liter to be 0.

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Thermo-economic analysis of a water-heated humidification-dehumidification desalination system with waste heat recovery

Cited by 64 publications

References 26 publications

Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System

Mathematical Approach to Improve the Thermoeconomics of a Humidification Dehumidification Solar Desalination System

Simulation of Desalination of Salt Water Comprising Polypropylene Hollow Fibre Membranes

Experimental investigation of two‐stage humidification‐dehumidification desalination system integrated with an innovative oxy‐hydrogen ( HHO ) system

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