Author(s)

Dilawar Husain^*, Sarvesh Shukla, Vivek Kumar Umrao, Ravi Prakash

Department of Mechanical Engineering, Motilal Nehru National Institute of Technology, Allahabad, India.

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 kWh_e/m² per unit envelope area, with associated reduction in GHG emissions up to 6.36 kg CO_2eq/m² per unit envelope area, assuming continuous operation of HVAC systems.

Sensible Heat Transfer Load, GHG Emission, Green Roof, Reflective Roof, Fly-Ash Bricks

Husain, D. , Shukla, S. , Umrao, V. and Prakash, R. (2017) Thermal Load Reduction with Green Building Envelope. Open Journal of Energy Efficiency, 6, 112-127. doi: 10.4236/ojee.2017.63009.