Variation Analysis in Cooling load between Single Pane Window and Double Glass Window in an Air-Conditioned Space
Date
2024-06
Authors
Journal Title
Journal ISSN
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Publisher
I.O.E
Abstract
This thesis compares the changes in the cooling load of an- air-conditioned space if doubleglazing glass is used in windows instead of when single-pane glass. It investigated the effect
of glass and its solar gain capacity in indoor temperature and finally on the air conditioning of
the building. It is based on the principle that different types of glass have different solar gain
constants and solar radiation gained through the glass directly alters the cooling load. For the
energy-efficient method, glass having the lowest gain is preferred which would reduce
radiation gain. Solar gain of double glaze glass is almost half of the single glaze glass due to
the air insulation. So, just by changing the glass type used in windows, a huge amount of air
conditioning energy can be saved.
Taking an air conditioning space, located in the Pulchowk Lalitpur, the total cooling load is
calculated. It is calculated by simple CLTD method i.e., cooling load temperature difference
method. For simplification, a commercial ASHRAE calculation sheet is used to calculate the
value of CLTD. Further environmental conditions and correction coefficient are taken
according to the latitude. To make the calculation more precise and efficient, calculations are
done for June and July at 12 PM, 2 PM, and 4 PM. The maximum cooling load is recorded for
June at 4 PM. Further, Calculations are completed by taking this peak value of the cooling load.
Description
This thesis compares the changes in the cooling load of an- air-conditioned space if double glazing glass is used in windows instead of when single-pane glass. It investigated the effect of glass and its solar gain capacity in indoor temperature and finally on the air conditioning of the building.
Keywords
double glaze glass, Single glaze glass, Solar gain, Payback Period