Experimental investigations on the performance of an air heated humidification–dehumidification desalination system

Water and energy crises are major challenges in many places of the world. The lack of drinkable water is often intensified in arid regions. Fortunately, this is generally accompanied with abundant sources of solar energy which can be used to drive desalination and water treatment systems. Solar powered humidification-dehumidification desalination systems (HDH) have attracted much attention in recent years [1-5]. The basic idea of solar-driven HDH systems is that when hot salt water is exposed to hot dry airflow, a specific quantity of vapour can be extracted by the dry air. Fresh water is retrieved by humid air condensation in a cooling coil in the dehumidifier section. Thus, the basic components of HDH cycle include a heat source, air humidifier and dehumidifier. Nafey [6] carried out an experimental investigation of HDH processes using a solar water heater and a solar air heater to heat the water and the air streams, respectively. Air humidification was carried out using an induced fan cooling tower. Orfi [7] presented a theoretical study of a HDH solar desalination system. The seawater was preheated in the dehumidification condenser and then heated in the solar collector before entering the humidification chamber. Antar [8] experimentally investigated an air-heated HDH desalination system with single-and two-stage heat recovery systems.

show abstract

“…The nominal torque of the motor can be calculated as shown in Eq. (8). This yields a value of 1.27 N m for the 400-W motor.…”

Section: Solar Field Pumpmentioning

confidence: 95%

Modelling and control of solar-driven humidification–dehumidification desalination plant

Gabra

Rady

Ghany

et al. 2019

Journal of Electrical Systems and Inf Technol

View full text Add to dashboard Cite

show abstract

“…Solar heating offers the advantage of increasing the air temperature, thereby enhancing the air's heat energy. This rise in air heat facilitates the system's capacity to absorb water vapor [70]. The solar water heater component is connected to the HDE unit to elevate the water temperature in the humidifier.…”

Section: Humidification Dehumidification (Hde) Technologiesmentioning

confidence: 99%

Mathematical Modelling and Performance Review of Desalination Technology Based Renewable Energy

Irwan,

Zohri

2024

MMEP

View full text Add to dashboard Cite

“…The maximum production rate of freshwater was 63.3 kg/d, and the estimated cost of freshwater using this system was USD 0.034/L. Experimental investigations were conducted by Antar and Sharqawy to evaluate the performance of air-heated single-stage and two-stage solar HDH desalination systems [14]. The fabricated systems were tested on the seashore of Dhahran, Saudi Arabia.…”

Section: Introductionmentioning

confidence: 99%

Humidification-Dehumidification Desalination System Powered by Simultaneous Air-Water Solar Heater

et al. 2021

View full text Add to dashboard Cite

A humidification–dehumidification (HDH) desalination system requires thermal energy to desalt seawater. An environmentally friendly approach to obtain thermal energy is to utilize solar energy using solar collectors. Either seawater or air (or both) are typically preheated by HDH desalination systems before these fluids are conveyed to the humidifier column. Compared with preheating only air or water, preheating both is preferred because improved performance and higher productivity are achieved. Many researchers have proposed dual preheated HDH systems utilizing two separate solar heaters/collectors for simultaneous air–seawater preheating. In this study, dual-fluid preheating is achieved using a single solar collector. The proposed simultaneous air–water solar heater (SAWSH) is a modified flat-plate collector designed for simultaneously preheating air and seawater before the fluids reach the humidifier. A thermodynamic study was conducted using formulated mathematical models based on energy and mass conservation principles. Then, the dual-fluid heating HDH system is compared with HDH systems in which only air or only water is heated. This work found that the former outperformed the latter. The daily and monthly performance levels of the system in terms of the outlet temperatures of air and water, distillate rate, and gain output ratio were calculated using the weather data of the hot and humid climate of Jeddah City, Saudi Arabia.

show abstract

Experimental investigations on the performance of an air heated humidification–dehumidification desalination system

Cited by 30 publications

References 21 publications

Modelling and control of solar-driven humidification–dehumidification desalination plant

Modelling and control of solar-driven humidification–dehumidification desalination plant

Mathematical Modelling and Performance Review of Desalination Technology Based Renewable Energy

Humidification-Dehumidification Desalination System Powered by Simultaneous Air-Water Solar Heater

Contact Info

Product

Resources

About