In order to create a comfortable working and living environment indoors in tropical countries, the outside air must be cooled and dehumidified often before entering the rooms. Membrane separation is a newly emerging technology for air dehumidification and is based on diffusion and solution mechanisms. Compared to other dehumidification technologies such as direct cooling or drying, there is no phase transition in membrane dehumidification, no contact between the fresh air flow and the desiccant, therefore membrane dehumidification not only requires less energy consumption, but also avoids problems. It also prevents cross contamination.
In this research, the work of designing and building a type of hybrid membrane air conditioning system (HMBAC) on a laboratory scale was designed and built based on a previously modeled model. The hybrid system includes a cross-flow membrane air dehumidifier unit that includes 950 pieces of inter-void fibers (PAN/PEBAX1657) with a length of 50 cm and an inner diameter of 12.5 cm, and a membrane contact unit as a humidifying unit that It was made with 850 pieces of pure interlayer fibers (PAN) with a diameter of 12.5 cm. The effectiveness of composite membranes was evaluated by descriptive gas permeability and dehumidification tests. And it was found that the selectivity of the composite membrane made for H2O/N2 was GPU 2154 and water vapor permeability was GPU 48. The effect of several different parameters in this system was evaluated, including the effect of vacuum pressure, the effect of moisture content of the incoming air, the effect of the speed of the incoming air, as well as the amount of water entering the humidifier unit. An 80-hour test showed that the membrane module using a low vacuum force, approximately 0.4 bar, on the lumen side of the hollow fibers has very good water vapor transmission properties. The performance of the system was evaluated during an 80-hour test in terms of cooling capacity and dehumidification rate