In order to quantitatively assess how energy-efficient a building can be with regard to building design, the author would like to propose an energy-efficiency factor in buildings (Khqnl) and a calculation formula for this factor. The actual thermal building calculations show that 86% of the overall heat transfer in a building comes through windows. Therefore the coefficient Khqnl depends largely on the sun-shading capacity of the windows that can be roughly calculated as energy efficiency factor of the window. The author will also address 6 main architectural characteristics of an energy-efficient building concept in Vietnam.
Ha, P. T. H. (2016). A concept for energy-efficient high-rise buildings in Hanoi and a calculation method for building energy efficiency factor. In Procedia Engineering (Vol. 142, pp. 154–160). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2016.02.026