Desiccant Based Solar Still For Diurnal Passive Atmospheric Water Harvesting Via Sorption Desorption Cycle

Water is one of the most important natural resources and is one of the basic need in today?s world but unfortunately, due to lack of proper measures for securing and preserving this natural resource, our country is suffering from water scarcity. This lacking of water has drawn our attention for find

Project Title

Desiccant Based Solar Still For Diurnal Passive Atmospheric Water Harvesting Via Sorption Desorption Cycle

Project Area of Specialization

Mechanical Engineering

Project Summary

SUMMARY OFTHE PROJECT

Water is one of the most important natural resources and is one of the basic need in today’s world but unfortunately, due to lack of proper measures for securing and preserving this natural resource, our country is suffering from water scarcity. This lacking of water has drawn our attention for find different ways to fill this void of water scarcity by introducing an idea that will benefit Pakistan greatly especially areas of drought be it Tharparkar or Karachi, where people are not receiving enough clean water for their day-to-day need. The proposal aims to work ahead in atmospheric water generation which dehumidifies the air with the help of some absorbent and process the water for use. The project had been proven to produce water fit for drinking. The device uses the absorption-desorption cycle to bring the temperature of the air below dew-point and condense the vapors. The device uses solar energy to carry out the whole process which is going to cut the excessive electricity demand. This project will prove to be very useful for the living in regions lacking a proper power supply and along with that are facing scarcity as well.  

Project Objectives

PROJECT OBJECTIVES

1. Systems design and simulation of the prospective configuration.
2. Fabrication of the machine/s. 
3. Test the systems efficiency by using different desiccants
4. Analysis and recording of our output generated with varying geographical, environmental and input conditions.
5. Solar powered input and the couple-efficiency

Project Implementation Method

Project Implementation

With the help of a desiccant material, the Passive Air Water Generator absorbs water from the atmosphere as the air reaches the system and comes into contact with it. The process of the cycle when the absorbent absorbs vapor from the humid air typically takes place at night when the temperature is low and the relative humidity (RH) is high,after the absorption comes  the regeneration/desorption of the desiccant material in which the heat from the sun is absorbed by the material in order to increase the Enthalpy of vaporization of the water and to collect the water that has been absorbed by the material, this process of the cycle takes place in the day as the solar heat can only be absorb during the day time.

Benefits of the Project

BENEFITS OF THE PROJECT

The designed AWG project would have serious positive impacts on the society as water scarcity is a major uprising issue. Following are the impacts of our designed system: The first and foremost impact would be that clean water would be accessible to those who don’t have easy access to drinking water or for sanitation purposes especially droughty areas, with the help of the project there will be an ample amount of clean and pure water for them. This project is also a great means for industries which require travel, such as the military, who can use an atmospheric water generator to create water when resources run low. This impact also fulfils the sixth sustainable development goal (clean water and sanitation). The designed system will promote good health and well-being as majority of the diseases occur through drinking water due to presence of hazardous compounds, bacteria, viruses and heavy metal contaminants but this project will eliminate all these problems and will produces pure drinking water with the highest quality and purity with low mineralization, free from biological contamination, and with excellent physical and chemical properties great for both industrial or polluted areas. This fulfills the third sustainable development goal. (good health and wellbeing).

The rate of depletion of the natural resource (water) because of the misuse of water is also a root of many problems related to water scarcity. This project would create an awareness on responsible consumption and production of water as basically the individual would be selfsustainable in water production. Agriculture plays a major role in our country’s economy and there is not enough water irrigation purpose as well because of the rate of depletion of water resources and this is indirectly effecting our country’s economy but this project will have a little impact in the agriculture on a small scale where water for irrigation is an issue which will lead to reduction in poverty and hunger. There are many hospitals in our country especially government hospitals as well as small clinics where the supply of pure water is very important as these hospitals and clinics are responsible for the better health of the public and the supply of contaminated water is very dangerous for patients who are vulnerable to diseases such as trachoma, typhoid, dysentery and diarrhea caused by polluted water. This project will help overcome all the above-mentioned problems by providing a pure supply of water for all the staff members, patients and visitors of the small hospitals and clinics.

Technical Details of Final Deliverable

A final technical report which will be generated on the information obtained from the numerical simulation that will be run on the final fabricated model.

Final Deliverable of the Project

Hardware System

Core Industry

Energy

Other Industries

Core Technology

Clean Tech

Other Technologies

Sustainable Development Goals

Good Health and Well-Being for People, Clean Water and Sanitation, Affordable and Clean Energy, Responsible Consumption and Production

Required Resources

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