scope:

INTRODUCTION

In the last decade, all-desiccant and hybrid desiccant systems have emerged as an alternative to conventional vapor compression systems for cooling and conditioning air in some type of buildings such as presented in Refs. [1-6]. A typical hybrid system combine a desiccant cooling system with a conventional vapor compression cooling system was presented in Ref. [2]. The main goal of application of hybrid desiccant cooling systems is using the high capability of desiccants in meeting the latent load of buildings. When combining with the high capability of vapor compression system in meeting the sensible load of buildings, the systems efficiency could be enhanced. Conventional vapor compression systems use a very low evaporator temperature in order to meet the high latent load of the air and reheat is often needed to bring the temperature to required temperature of the supply air. This problem causes the system to have poor energy efficiency. Different studies have been conducted to compare hybrid desiccant cooling systems with conventional vapor compression system such as presented in Ref. [7]. This study developed and demonstrated a different and important variable of climate conditions in several states in Malaysia for energy saves and cost-benefits to air conditioning applications. Figure 1 shows a typical two wheel desiccant dehumidification system uses a heat-regenerated desiccant wheel to remove the latent load, as shown in this study when using hybrid cooling system will be saved a high portion of electricity in Malaysia.