MOISTURE ELECTRIC GENERATORS

Moisture electric generators (MEGs) or hydro-voltaic generators are devices that convert energy from water vapor, humidity or evaporation into electricity directly. These generators harness the energy potential of water vapor in the atmosphere to provide electric power.

There are several types of moisture electric generators and they are; grapheme oxide (GO) based MEGs, ionic hydrogel based MEGs, Nano fiber/electrospun membrane MEGs, carbon nanotube (CNT)/MXene based MEGs, polyanion/polycation (ionic dioxide) MEGs and biological/green material MEGs.

Grapheme oxide (GO) MEGs are thin films of oxidized grapheme whose oxygen rich surface groups (COOH, -OH) absorb moisture, dissociate protons and drive directional ion flow between two electrodes to generate electricity.

Ionic hydrogel MEGs are flexible polymer networks (PVA, PAM, cellulose etc.) swollen with water and loaded with ionizable groups. Moisture absorption triggers proton release and directed ion migration via a rapid proton hopping mechanism along hydrogen bonded water chains thereby generating continuous electricity.

Nano fiber based moisture electric generators use nanofibers to harvest energy from moisture in the air. The Nano fibers absorb moisture from the air creating a thin layer of water on their surface. The absorbed water molecules ionize, creating positively charged hydrogen ions (H+) and negatively charged hydroxide ions (OH-). The positively charged hydrogen ions (H+) transfer through the nanofiber creating or generating an electric current.

Carbon nano tube based moisture electric current generators use carbon Nano tubes (CNT) to harvest energy from moisture in the air, creating a thin layer of water on their surface. The adsorbed water molecules undergo electrolysis, splitting into positively charged hydrogen ions (H+) and negatively charged hydroxide ions (OH-) to the CNTs creating or generating an electric current.

Polyanions based moisture electric generators use polyanions to harvest energy from moisture in the air. The polyanions adsorb moisture from the air, creating a thin layer of water on their surface. The polyanions exchange ions with the adsorbed water molecules creating a flow of ions. The flow of ions between electrodes generating electricity.

Biological moisture electric generators (BMEGs) use biological systems such as microorganism or biomimetric materials to harvest energy from moisture in the air. Microorganisms such as bacteria or yeast respire and produce electrons as by product. The electrons are transferred to an electrode creating an electric current.

The advantages of moisture electric generators are; moisture electric generators provide a sustainable and renewable source of energy reducing dependence on fossil fuels. Moisture electric generators have low operating costs as they do not require fuel or significant maintenance. MEGs produce no greenhouse gas emissions or pollutants during operation, MEGs systems can also produce clean drinking water, which can be used for irrigation, industrial purposes or human consumption.

The disadvantages of moisture electric generators are; moisture electric generators rely on atmospheric humidity, which can vary significantly depending on location and weather conditions. The initial investment cost for moisture electric generators can be high, making them less competitive with traditional energy sources. The scalability of moisture electric generators is limited by the size of the device and the amount of moisture available in the air. Moisture electric generators face technical challenges such as corrosion, material degradation and system efficiency.

Moisture electric generators find applications in the following; moisture electric generators can provide water and energy to remote communities where access to water and traditional energy sources is limited. Moisture electric generators can be used in industrial settings such as data centers to provide reliable and sustainable energy. Moisture electric generators can be used in disaster relief situations providing energy and water to affected areas. Moisture electric generators can be used in agricultural settings providing energy for irrigation systems and water for crops.

The future of moisture electric generators will be based on the advances and development of the following technologies; optimizing moisture generators designs, materials and systems to increase efficiency and power output. In the future there will be increased scalability of moisture electric generator systems, leading to the development of more powerful systems for industrial and commercial applications. Advances in manufacturing will enable the production of low cost moisture electric generators and thus increased adoption in niche applications in communities, industries and other applications such as space exploration and so on. Development of new materials will reduce the effect of corrosion, material degradation and system inefficiency.

 

SOURCES:

• Moisture electric generators: A new era in renewable energy by Dr S.S Chantel and Dr A.K Singh.
• Humidity powered generators: A review of current research and development by Dr J.M Wang and Dr Y. Zhang.
• Renewable energy power for a sustainable future by Godfrey Boyle.
• Sustainable energy: Choosing the right solutions by Jeffrey Logan and others.
• Water energy interactions: A review of current research and future directions by Dr M.M.S Ali and Dr S.S Chandel.