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EFFICIENCY OF SOLAR CHIMNEY

Sumedha Dua, Deepanshu Kochar

Abstract


With the increase in energy consumption of HVAC and increase carbon footprint there is critical need for the incorporation of passive cooling techniques inside the building to reduce the carbon footprint due to the HVAC.
Energy consumption by fans, air conditioners can be reduced by integrating the solar chimney in the building. This is passive solar heating and cooling system which helps to attain the energy efficiency in a building just like solar
wall or trombe wall. For the maximum efficiency it is important to understand the working of solar chimney along with the other parameters which affect the performance of solar chimneys. In this paper the efficiency of Solar
Chimney efficiency is studied with respect to various parameters like Height of the Chimney, Air gap and width ratio, and Angle of inclination. The effect of solar radiation on the ventilation velocity and along with this energy simulation of a case study is also considered to know about the saving in energy consumption by using Solar Chimney in comparison with the HVAC. Another case which is studied is of the house having an area of 220 sqm with the solar chimney on the west side of the wall and a VRF system. Its ventilation energy consumption and total energy consumption is compared with the same size of the house but without a solar chimney throughout different seasons. It is observed that total energy saving of the case study with Solar Chimney and VRF is about 9% of the
total HVAC consumption and the least energy consumption with Solar Chimney is in winter season giving a total saving of 99.8% when compared with the non-solar chimney house.


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References


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