Adsorption air conditioning: a comprehensive review in desiccant materials, system progress, and recent studies on different configurations of hybrid solid desiccant air conditioning systems

Abstract

The desiccant air conditioning system has multiple advantages (e.g., no use of ozone-depleting refrigerants, highly efficient moisture control, easy regenerative integration) over traditional vapor-compression refrigeration systems, thus increasingly attracting more research interest. Recently, several studies have been conducted that primarily aimed to enhance the overall performance of desiccant air conditioners by innovating new desiccant materials, innovating new system configurations and improving system designs and controls, and integrating different hybrid energy sub-systems technologies. Therefore, this paper provides a comprehensive review of the studies mentioned earlier. The present comprehensive review dealt with several axes: first, an overview of the importance of using desiccant air conditioners and their operations, and performance indicators. Second, a summary statement for desiccant materials that includes: the new innovative desiccant materials and the most important composite desiccant materials. Third, detailed information on the newest innovative designs and configurations of desiccant air conditioning systems and their control systems. Fourth, a detailed statement on the most important hybrid energy sub-systems technologies integrated with desiccant air conditioners. Based on the latest developments in desiccant air conditioning systems, this study presents discussions of urgent issues and recommendations for future work that can help focus necessary efforts to find solutions to critical and pending problems, which lead to further improvements in the overall performance of desiccant air conditioners.

Impact of Ambient Temperature and Humidity on the Performance of Vapour Compression Air Conditioning System - Experimental and Numerical Investigation

“…Increased ambient humidity can have an adverse effect on the performance of the evaporator and the condenser of the vapour compression cooling systems, thus reducing its performance [27][28][29][30][31]. The condenser plays a significant role in rejecting heat to the surroundings, but when the ambient air is already saturated with moisture, it will have a lower capacity to absorb the heat released by the condenser.…”

Accelerated Water Desorption of Oligomeric Poly(ethylene glycol) by Addition of Poly(propylene glycol) for Energy-Efficient Water Recovery Systems

“…5 A wide range of technologies are currently being developed to utilize low-grade heat in air conditioning, power generation, 6 agricultural processes, 7 and water systems. 8 There has been particular interest in the development of adsorbents for desiccant air conditioning (DAC) 9 and atmospheric water harvesting (AWH) 10 systems, which enable the recovery of water vapor from the air under low humidity conditions in an energy-efficient manner. In these systems, it is important to develop adsorbents that can be regenerated using low-grade heat to achieve autonomous DAC and AWH.…”

Preparation of porous membrane for moisture absorption from high‐humidity gases

“…Although solution dehumidification is a low‐energy dehumidification method, its dehumidification performance is limited by droplet entrainment, and the operation process necessitates the use of chemical substances, which pollute the environment and are unsuitable for large‐scale applications 15,16 . Solid‐state dehumidification achieves the goal of dehumidifying and drying the air in the surroundings by using substances with the ability to absorb water from the surrounding environment 17 . The dehumidification effects of its technique are stable and recyclable, making it more appropriate for the market use of disposable goods.…”

“…15,16 Solid-state dehumidification achieves the goal of dehumidifying and drying the air in the surroundings by using substances with the ability to absorb water from the surrounding environment. 17 The dehumidification effects of its technique are stable and recyclable, making it more appropriate for the market use of disposable goods. It is also green and environmentally benign, 18,19 making it more suited for the market use of throwaway products.…”