Low Cost Liquid Desiccant Dehumidification and Cooling System

Abstract

Our project is to provide air at 20 degree centigrade and 40-50% relative humidity which will be used to cool a room in Pakistan. Pakistan experiences very high temperatures and long humid spells during the summer. Often these spells leave thousands with heat strokes. People invest in products (water evaporation air coolers & compressor based air conditioners) to cope with the heat. However, water evaporation air coolers become ineffective in the humid conditions and compressor based air conditioners fall beyond the pay check of most population. We have built a Liquid Desiccant Dehumidification & Cooling system (LDDCS) which is cheaper and consume less electrical power than an average compressor based air conditioner. Our product has three major components, liquid desiccant dehumidifier to remove moisture content from the air and disinfect the air, liquid desiccant regenerator to expel the excess moisture to the environment outside and water based indirect evaporative air cooler to lower the temperature of the air. The LDDCS was examined under different room conditions condition. The data collected from this system is used to determine the results. This system provides us the air of 20 degree centigrade from 30 centigrade with 45% humidity. This system is cost effective and environment friendly.