Papers by Syed Muztuza Ali
In this paper, the development of the heat exchanger for air conditioner indoor unit which applie... more In this paper, the development of the heat exchanger for air conditioner indoor unit which applied micro channel is summarized. Since 2006 we applied condenser of parallel flow type to the outdoor unit of the air-conditioner (cooling only model). And we developed the evaporator of parallel flow type to the indoor unit of the air-conditioner (heat pump model) in 2011. Also in order to solve the frost and de-frost problem in heat pump outdoor unit, we developed a new condenser of parallel flow type which applied flat shape fin for frost and de-frost characteristics in 2012. Existing parallel flow heat exchanger for indoor units developed for floor type products, with micro channel tube horizontally and header perpendicularly. Because the existing one did not match the indoor unit of air conditioner except the floor type (it reduces performance), and a new type parallel flow heat exchanger for indoor units was developed, which applied micro channel tube perpendicularly and header horizontally. We finished the development of the parallel flow heat exchanger which was applicable to all of air conditioner products by this development.
Compared to conventional vapor-compression systems, liquid desiccant cooling systems provide bett... more Compared to conventional vapor-compression systems, liquid desiccant cooling systems provide better air quality due to dehumidification and sterilization by desiccant. Comparison of performance between a liquid desiccant system and vapor-compression one is executed. To evaluate and compare the performance of both systems, simulation model is developed using EES(Engineering Equation Solver). The vapor-compression system uses R-410a as a refrigerant and the liquid desiccant system includes a solution circuit using lithium chloride in addition to the conventional vapor-compression cycle. The performance of both systems corresponding to given operating conditions such as indoor/outdoor temperature and humidity is presented in terms of COP and cooling capacity. It is found that the liquid desiccant system gives higher performance at lower outdoor humidity and higher indoor humidity conditions than the vapor-compression system.
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Papers by Syed Muztuza Ali