A computer-aided decision supporting tool for nearly zero energy building renovation

Abstract

In this paper, methods and the development of computer tools for the comprehensive quality evaluation of the design and renovation of buildings are shown. Following the requirements of sustainable development and the Energy Performance of Buildings Directive (EPBD), an overall assessment is needed to estimate the quality of those processes. Such an assessment includes energy, environmental and costs optimisation in a life cycle period. Energy performance indicators are evaluated using EN standard procedures for the calculation of energy needs and final energy demand for EPBD building services operation. Environmental indicators are divided between mid-point characterisation, based on Environmental Product Declarations (EPD) and an end-point characterisation based on IMPACT 2002+ and ReCiPe methods. A discounted costs-and-savings cash flow method is used for cost optimal evaluation of the energy efficiency measures and renewable energy sources technologies. A case study of a hospital building is shown.