TITLE:
Thermal Load Reduction with Green Building Envelope
AUTHORS:
Dilawar Husain, Sarvesh Shukla, Vivek Kumar Umrao, Ravi Prakash
KEYWORDS:
Sensible Heat Transfer Load, GHG Emission, Green Roof, Reflective Roof, Fly-Ash Bricks
JOURNAL NAME:
Open Journal of Energy Efficiency,
Vol.6 No.3,
September
25,
2017
ABSTRACT: Various
studies have confirmed that high thermal resistance in roof & wall can
reduce the heat transfer load of the buildings. In this study, experimental
investigation of the effects of some sustainable features (such as green roof,
reflective coated roof & Fly ash brick (FAB) etc.) on the building has been
conducted in the Indian context. For the purpose, two scaled building models i.e. Model I (conventional design) &
Model II (green design) have been examined with different design
configurations. The sensible heat transfer (SHT) load of the building is
reduced by 21% - 29% through the use of FAB with cavity wall in
place of Fired clay brick (FCB) wall. The load reduction increases to 26% - 44% by
using FAB cavity wall with reflective coating on the roof. This reduction
further increases to 64% - 68%
with FAB cavity wall along with green roof. In this final scenario, the monthly
electrical energy saving for air-conditioning is approximately 5.1 kWhe/m2 per unit envelope area, with associated reduction in
GHG emissions up to 6.36 kg CO2eq/m2 per unit envelope area, assuming continuous operation of HVAC systems.