Abstract:
Water scarcity is a major crisis and is growing with the passage of time. The present water resources are either getting contaminated or being wasted, also the increase in the overall population is exerting a great pressure on the existent water sources. This problem is a greater concern for developing and under-developed countries. In order to meet the increasing freshwater demand, the desalination techniques are gaining more importance. Bubble column humidification dehumidification systems offer a great prospect for the solution as they require less maintenance and are simpler; especially for decentralized and remote area application. The project involves the detailed literature review on the different desalination techniques. Based on the review, a system comprising of a stepped multi stage humidifier and a multi stage dehumidifier is proposed. A mathematical model of the basic HDH system was studied and a parametric analysis of the performance of the system was performed. Also, experimental analysis regarding the bubbling mechanism was performed and the bubbling scheme giving the maximum effectiveness was selected. Based on the analysis and experimental investigation a 3D model of the project was developed using SolidWorks. The prototype manufactured had a productivity of 9.84 liters/day. The developed system can be used in decentralized and remote areas applications where drinking water is scarce. The system can also be used along with the desiccant cooling system to serve as an air conditioning system.
