NED University Journal of Research
An International Journal
ISSN 2304-716X

The Effects of Different Design Parameters on the Energy Consumption of a Low Energy House

Author(s): Anjum Khalid, Muzzaffar Mahmood, Noman Ahmed

Volume: Thematic Issue on Energy

Pages: 35-42

Date: January 2012

In this study two similar houses with identical occupancy were modelled on TRNSYS software. One house was of conventional construction with uninsulated concrete block walls, single glazed windows, and no heat recovery from the ventilation air. Second low energy house had 200 mm (8 in.) thick insulation, double glazed low U-value windows, energy efficient lights and heat recovery from ventilation air. These houses were simulated for Karachi weather conditions to estimate energy consumption and comfort parameters. The results showed that low energy house maintained comfortable living conditions throughout the year with small swings in the inside wall surface temperature and air humidity while its cooling energy demand was less than half of that of the conventional house which also experienced larger fluctuations in inside wall surface temperatures. It has been suggested that if such houses are built on a large scale then considerable electrical energy can be saved on national level.

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