Air conditioning system consumes majority of energy and the improvement of energy efficiency is quite important. For example, residential type vapor-compression air conditioner has COP (coefficient of performance) between 3.0 and 4.5. The CFC refrigerants used in air conditioner also cause global warming. Water is thus the most natural refrigerant and is used in LiBr–H2O absorption system, a sophisticated machine using heat as the driving energy source.
Design of experimental cellulose-pad
water cooling system
The concept of the cellulose-pad water cooling system is shown
in Fig. 2.Water is circulated through the cellulose-pad cooling
tower to dissipate heat to the ambient at night.The cooled water
is stored in a storage tank with thermal insulation. The cold
water is circulated to an indoor air cooler to cool a room at
daytime. An experimental system is designed and built for test
in the present study.