Abstract
The use of seawater desalination technology to solve water shortages in energy- and resource-scarce regions has attracted widespread attention worldwide. In this paper, the performance of a closed-cycle humidification–dehumidification desalination system with a heat pump was experimentally investigated. The system is a closed-cycle system, which includes humidifiers, a heat pump, dehumidifiers, and an air heat exchanger. The heat pump is used by the system to carry energy. The effects of different parameters on the system performance were studied. Scale and economic analyses of the system were conducted to explore the application prospects of the system. The maximum gained output ratio of the system was 4.82. The maximum freshwater production was 960 kg/h, and the cost per kilogram of freshwater was USD 0.03, which are more considerable compared with other systems. This system provides an effective way to save energy in remote areas with energy shortages and freshwater resource shortages.
Highlights
The world economy has developed rapidly, the scale of industrial activities has continued to increase, and the population has accelerated, resulting in global water shortages [1]
HDH desalination technology is a promising option to ensure the safe supply of freshwater in regions with scarce water resources [3]
The maximum production efficiency, humidifier efficiency, the gained output ratio, and economic cost are studied and compared with other HDH systems. This system provides a better method for the popularization of desalination technology in remote areas with energy shortages and freshwater resource shortages
Summary
The world economy has developed rapidly, the scale of industrial activities has continued to increase, and the population has accelerated, resulting in global water shortages [1]. Many scholars have performed numerous different studies on the application of solar energy in HDH desalination plants. The different parameters of the system are studied, including the temperature of seawater entering the humidifier (Ts1 ), the flow rate of seawater entering the humidifier (fs1 ), and the air flow rate in the plant (Fa4 ) On this basis, the maximum production efficiency, humidifier efficiency, the gained output ratio, and economic cost are studied and compared with other HDH systems. The maximum production efficiency, humidifier efficiency, the gained output ratio, and economic cost are studied and compared with other HDH systems This system provides a better method for the popularization of desalination technology in remote areas with energy shortages and freshwater resource shortages
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