QUANTIFYING THE EVAPOTRANSPIRATION PROCESS OF GREEN ROOF SYSTEM IN HOT AND DRY CLIMATIC CONDITION OF INDIA

Abstract

It is predictable that approximately 40 % of universal energy is associated with the buildings maintenance and building construction so building segment is associated very huge amount of energy utilization worldwide .So there is very high energy economy prospective in building segment .Building segment are also associated 33 % of green house gas production internationally. Due to the very high amount of energy consumption in building construction and maintenance and greenhouse gas ambition .There are so many sustainable approaches and environment friendly technologies have been introduced in this category, green roofs are identified as an important energy efficient technology that could potentially offer, the several benefits to society and environment. Plants on the green roofs can purify the air, plants and substrate can purify the rain water runoff as well as delay the storm peak. The evapotranspiration had most significant role of reducing the intensity of all the solar heat fluxes by modeling, diverting and outgoing heat flexes, depending on state of plants like desert native plants and crassulacean acid metabolism plants. Due to numerous biological reactions in experimental set up 69% of heat flexes was reduced by evapotranspiration process. We measured that temperature outside and inside temperature reduction was 46% green roof with moisture. Interestingly, the lowest conductive heat fluxes through the green roof were found when the green roof was wet. The experimental and calculated data shows that model tends to predict 69% of evapotranspiration, 23% sensible heat, 5 % soil convection heat and 3% heat for conduction, transpiration, photosynthesis respiration reaction process for energy balance for green roof system with moisture. In the summer conditions when temperature is high thus increase the evapotranspiration process it reduces air cooling load (HVAC) inside of building.