A Review of Solar Air Heater with Close Water Open Air (CWOA) For Humidification-Dehumidification Process
Keywords:
Humidification; Solar Radiation; Circular Solar Collector; Dehumidification; Air HeaterAbstract
The process of humidification-dehumidification has many advantages, such as the simple equipments,
working under normal condition like atmosphere pressure, the cost of investment and operation is moderate too low, the
flexible scale and the low-grade energy available,. Hence, it has a good developing prospect. Humidification
dehumidification process is viewed as a promising technique for house hold capacity production plants. The process has
many attractive features, which includes operation at low temperature sources, and requirements of low level of
technical features. On the other hand, most of the ongoing researches concentrate on large-scale plants which are
suitable for mass production of fresh water they also cause environment pollution because they are fossil-fuel driven
solar air heating, in contrast, has not been studied extensively. The heaters will be compared on the basis of their
collection efficiencies These heaters can utilize about 40% or over of the total cost of a humidification-dehumidification
system and so the development of a cost effective and efficient solar collector is essential to the system‘s overall
feasibility [1]. Considering the importance of solar air heaters to the overall performance and cost of HDH air-heating
systems, they are reviewed in the current paper , which is defined as the useful heat gain of the air stream (in watts)
divided by the solar irradiation incident on the collector (also in watts), Heat gained by air
The collectors which are flat plate with large airflow channels. Air flows over or under the absorber plate, and doublepass strategies are sometimes employed. In flat plate air heaters cost incurred due to insulation cladding are more so the
air heaters with less amount of insulation are required to develop. Air heater with Circular solar Collector having,
minimum incident angle effect, high efficiency, variable mass flow and with insulation on outlet air unit to reduce heat
loss.
