Experimental Study of the Cooling Performance of Trombe Wall with Geothermal Air Tube System

Abstract

Energy efficiency in buildings is today a major purpose for energy policy at regional, national and international levels. This energy can considerably reduce with the integrated of passive energy buildings. Therefore, this paper proposed an experimental work to evaluate the effect of integrated geothermal air tube heat exchanger system with the Trombe wall system on cooling and ventilation performance. This study carried out on a building room located in New Borge Alarab city, Egypt. The geothermal air tube heat exchanger used to cool the outside air before entering the room, which extracted inside the room by Trombe wall effect that installed at the room south facade. Tests are performing to evaluate the effect of integrated systems with others. The temperature difference between the inside and outside, airflow in Trombe wall and geothermal system, relative humidity, hourly and daily-ventilated air at different companied systems are measured. From the study, the effect of operating parameters denotes that the effect of temperature difference on the system results in a decrease by integrated geothermal with Trombe wall and airflow rate in Trombe wall increasing. The increase of airflow rate causes good room ventilation. The system indicates that the system indicates that the cooling performance of Trombe wall doubled by coupling geothermal air which decrease the temperature different between outside and inside by 1.2°-3°C.