Abstract
Craving for higher comfort and rise in living standards in various societies have led to higher demand for air conditioning. Energy consumption is related with climate change. Desiccant based air dehumidification systems can run with waste heat or renewable source of energy. Liquid desiccant (LD) based air conditioning systems are many times conceived as complicated and costly. A novel but simple internally cooled LDAD system is developed, integrated and tested in this work. Outdoor air was passed through the coil, thus making it essentially a study of fresh air enthalpy removal. Temperature range of 14 to 22 o C was used for cooling water, which can be catered by a single stage vapour absorption refrigeration system on lower side or cooling tower on the higher side. The cooling capacity of the system increased up to 54%, compared to conventional chilled water coil. Latent heat fraction removed was also higher, showing usefulness of the system for higher latent load applications. Higher air velocity was found to give higher cooling capacity, while moisture removal per kg of air and effectiveness were higher at lower air velocities.
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