Analysis of Air Conditioning Schemes based on Evaporative Cooling of Air using Solar Energy
Abstract
The article presents the calculation method based on the heat and humidity parameters of the units direct and indirect-evaporative cooling in air conditioning systems in buildings are analyzed various technical diagrams. On the basis of experimental and theoretical studies established the benefits of schemes based on indirect-evaporative cooling. The processes of heat and humidity of air treatment, demonstrate the benefits of solar installations with devices indirect evaporative-type compared to conventional solutions.
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Introduction
To create a comfortable climate for a person in a microclimate in a room, it is necessary to provide air exchange and normalized air parameters. This also applies to most industrial shops in industrial production. Large air exchange in such premises entails and the corresponding heat costs for heating the supply air during the cold period of the year. In the summer, this is also associated with significant energy costs for cooling the air [1,2].
Conclusion
Thus, the realization of IEC (in contrast to direct evaporative cooling) makes it possible to use the natural thermodynamic non-equilibrium of atmospheric air to produce cold.
The prospects of using these devices in solar air-conditioning plants are due to the possibility:
Reducing the temperature level of the resulting cold;
Improving the efficiency of latent heat assimilation in air-conditioned rooms;
Reducing energy consumption by means of a purposeful combination of different flow patterns of exchanging flows;
Rational use of heat of phase transformations and renewable energy resources of thermodynamic non-equilibrium of atmospheric air.
Fig.2. presents examples of schemes for processing fresh air in solar air-conditioning plants using the IEC cross-precision apparatus. A qualitative analysis of the proposed schemes was carried out under the following assumptions:
• Air parameters at the outlet from the sorption dryer are assumed to be the same for all options;
• The temperature of the exhaust air is equal to the temperature of the air in the room;
• Depending on the temperature of the air at the outlet of the CRO, the air exchange changes in such a way as to maintain the assimilation capacity of the fresh air, which is constant for all options;
• The efficiency of the regeneration process of the desiccant nozzle is assumed to be the same for all variants.