Design of Desiccant Disk for use in Solar Air Conditioners

Project Overview

Because there is always a percentage of humidity in the climates all over the world, industrially, it is not good to process materials in a humid climate. That may affect the synthesis of materials and affect the functionality negatively. For example, handling sheets of steel in a humid climate may affect the quality of steel in a bad way. Iron also is corroded in a humid climate. Hence, there is a need to reduce humidity to the least limits available to be able to conduct chemical operations effectively. In fact, there are many triggers that can be used to reduce the high humid levels in the weather.

Desiccant dehumidifier is known for its ability to dry the atmosphere all around a chemical process. However, there must be a type of technology that supports a complete functionality of desiccant humidifiers. For example, there is the rotary desiccant air conditioning system. It integrates with other desiccant dehumidification technologies to enhance the process of evaporative cooling. This technology is great with the freeing the weather from all CFCs depending on low thermal energy grades. In addition, it is great with the controlling levels of general humidity and temperature as well. The Ongoing researches all over the world suggested new desiccant materials that can work better to improve desiccation process and to increase the reliability with dehumidification within air conditioning systems. Rotary desiccant air conditioning systems are good designed tools that help with dehumidification process.

This project is to design and manufacture a dehumidifier by using silica gel to absorb the moisture from the air. The design consists of a duct which is a cylindrical pipe used to dry the air in it. Inside the duct there is a disc that carries silica gel which is the material we used to dehumidify the air. There is also a shaft that makes the disc rotate. The duct is split into two parts from the inside and each part has its own enter and exit. The first part is for fresh air to do the operation on it and dehumidify it and the second part is for hot air to dry the silica gel.

Project Objectives

  • Improve the instrumentation and data acquisition (thermocouples, pitot tubes, RH sensors)
  • Add an indirect evaporative cooler and water sprayer
  • Manufacture a trolley to mount the disk and the motor on to be easier to move.
  • Design a gears box reduction mechanism to enhance the performance gears box.


Final Report