Assessing the energy-saving potential of different roof systems
potential of different roof systems varies vividly with a change in materials
and the technologies that are required to build them. There have been several
experiments conducted to deduce what is the best type of material that can
serve the required purpose of the roof system. On the basis of those
experiments, few models have been derived. Have a look below as we discuss the
energy-saving potential of different roof systems.
Cool and modified Bitumen model
Cool and modified
Bitumen model of the roof is one of the first models that has been developed,
in which the cool surface reflectivity is altered. The surface of the roof is
covered with the insulating material on both sides of the base. The surface is
exposed to different radiations of smaller and long radiations is calculated
and thus providing clear results.
The term covers
various roofing options such as low sloped roofs, that are common in commercial
buildings, industrial buildings, and multifamily homes. An application of cool
coating over the roof has many benefits including durability, suppression of
algae growth, and an ability to self-was under rainfall. Steep sloped roofs
that are found in residential buildings include cool coloured tiles and painted
metal that contain pigment, which reflects 25 to 70% of solar energy. Cool
roofs are most common in urban cities as it reduces the environmental impact of
The energy balance
that is developed is Cool and Modified-Bitumen Roof Nodal Energy Balance in
which energy balance for various nodes is calculated. The temperature
variations of the nodes are analyzed on the basis of various equations derived
and the results are concluded.
Another model is
the Green model that uses sustainable materials for its construction. The green
roof model requires irrigation weekly and the amount of water transpiration is
used as the standard to determine the amount of transpiration that has
occurred. The green roof is the most effective technique of passive cooling. Green
roof constitutes material for percolation, the membrane, and barrier so that
the water can not enter in the structural component of the building. The
temperature profiles are determined according to the various temperatures. The
green roof nodal energy balance is determined by checking various materials
used in green roof their respective behaviour in various climatic conditions.
The annual energy
consumption of the different roof models is also determined by plotting a graph
of the R-value and function of the roof.
By using such
eco-friendly components in the building, we are moving towards a more
sustainable way of living. The impact assessment of different roof systems is
varying and hence the analytical report is prepared accordingly. The experimental
values are clearly recorded for illustrating the results. The thermal findings
of the green roof have proven to be very effective and thus green roofs are
being used in various places for its varied advantages.
roof offers a solution for the urban cities that are eventually turning into
heat islands. The constant increase in temperature and carbon footprint has
made the cities had to survive. Air conditioners and other cooling options can
provide temporary relief but they are not the permanent solution from the
environmental crisis. Using sustainable construction techniques like
energy-saving roof systems can provide heat relief without harming the
environment and the solutions are economical as well. Turning to sustainable
living technologies will not only help in surviving the heat but also have a
great impact on the environmental infrastructure.
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