Abstract
Refreshing air remains a crucial problem in warm climates where electricity consumption for air conditioning has become excessive and irrational for several years, notably in Algeria. Research in this field is increasingly oriented towards new techniques that can reduce costs and environmental impacts. Among these techniques, the evaporative dew point cooling technology is the most promising as it can cool outdoor air to temperatures below its wet bulb temperature. The aim of this work is to model and design a dew point cooler for french and algerian climates. This model is used to study the effect of the cooler parameters such as its length, water temperature and working air ratio on its cooling effectiveness and supply temperature.
Highlights
Building sector is the largest energy consuming sector in the Mediterranean region due to lacking awareness about the importance of thermal insulation and housing stock aging
In 2010, about 5% of French and 16% of Algerian households were equipped with air conditioning systems which respectively represented an electricity consumption of 450 kWh and 700 kWh per equipped household [2]
The purpose of this paper is to model and validate a dew point evaporative cooler able to be used for both climates in France and Algeria
Summary
Building sector is the largest energy consuming sector in the Mediterranean region due to lacking awareness about the importance of thermal insulation and housing stock aging. If the optimization of the architectural design improves indoor thermal comfort conditions, it may be incompatible with the architects needs or it can reach its limits during the heat wave periods In this context, the concept of evaporative cooling is a proven alternative that contributes to environment preservation. Riangvilaikul et al [11] have experimentally studied an evaporative dew point cooler with different air inlet conditions (velocity, humidity, and temperature). It is made of a counter flow heat exchanger of two channels (dry and wet channel) exchanging heat through a thin wall. The ratio of airflow in the wet channel to that of the dry is called working air ratio and it generally varies between 0.3 and 0.7 [16]
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