Abstract
Now days, air conditioning systems are a must for almost every commercial and residential building to achieve comfortable indoor conditions. The increasing energy demand, and increasing oil prices and pollution levels raise the need for alternative air conditioning systems which can efficiently utilize renewable energy resources. The liquid desiccant-based air conditioning method is pollution free and thermal energy-based cooling techniques can use low grade thermal energy resources like solar energy, waste heat, etc. These systems have an additional advantage of cleaning bacteria and fungi from the air. In this paper, a newly proposed rotary liquid desiccant air conditioning system has been investigated theoretically. Most direct contact liquid desiccant cooling systems have the problem of desiccant carryover which can be eliminated using the proposed system. The effects of various key parameters and climatic conditions on the performance of the system have been evaluated. The results showed that if the key parameters of the system are controlled effectively, the proposed cooling system has the ability to achieve the desired supply air conditions. The system can achieve high coefficient of performance (COP) under different conditions. The dehumidifier has a sensible heat ratio (SHR) in the range of 0.3–0.6 for different design, climatic, and operating conditions. The system can remove latent load efficiently in applications which require good humidity control.
Highlights
Due to economic development and population growth in the past decades, the global consumption of energy has increased significantly
Conventional air conditioning systems can effectively control the sensible loads of the conditioned space these systems are inefficient to control the latent load
Six performance parameters are used to analyze the performance of proposed rotary liquid desiccant cooling system. These parameters are as follows: The rate of moisture removal from the process air by the liquid desiccant cooling system is defined as moisture removal rate (Mr ):
Summary
Due to economic development and population growth in the past decades, the global consumption of energy has increased significantly. The. Energies 2016, 9, 305 overcooling and reheating of process air makes the conventional air conditioning systems energy inefficient [2]. Energies 2016, 9, 305 overcooling and reheating of process air makes the conventional air conditioning systems energy inefficient [2] This process of condensation may result in the growth of mold and bacteria because of the wet surfaces of cooling coils which leads to poor indoor air quality and undesirable health issues within the conditioned space [3,4]. Desiccant air conditioning techniques have been proved to be promising energy efficient cooling systems which can improve the health and productivity of the occupants by maintaining acceptable indoor air quality [11,12].
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