Abstract
Improving energy efficiency in public buildings is one of the main challenges for a sustainable requalification of energy issues and a consequent reduction of greenhouse gas (GHG) emissions. This paper aims to provide preliminary information about economic costs and energy consumption reductions (benefits) of some considered interventions in existing public buildings. Methods include an analysis of some feasible interventions in four selected public buildings. Energy efficiency improvements have been assessed for each feasible intervention. The difference of the building global energy performance index (EPgl) has been assessed before and after each intervention. Economic costs of each intervention have been estimated by averaging the amount demanded by different companies for the same intervention. Results obtained show economic costs and the EPgl percentage improvement for each intervention, highlighting and allowing for the comparison of energy consumption reduction and relative economic costs. The research results come from data gathered from four public buildings, and as such they could not be used to generically identify cost-beneficial energy efficiency interventions for every context or building type. However, the data reveals useful cost based considerations for selecting energy efficiency interventions in other public buildings.
Highlights
Energy efficiency assessment is an evaluation process to promote the improvement of building energy performance starting from the information gathered during specific surveys or provided by owners and users about energy consumption required to maintain a specified indoor climate in terms of temperature and relative humidity [1]
Based on the above considerations, this paper investigates the cost-benefit analysis of energy efficiency retrofitting interventions on public buildings, highlighting more effective interventions according to building characteristics and features, by the estimation and comparison of the economic cost and the energy efficiency improvement for each considered retrofitting intervention
Considering expenses estimated by the five different companies, economic costs incurred for both considered interventions in Ministry of Economic Development (MiSE) are reported in Tables 12 and 13 show the economic cost estimated for the two plants in ASI and Ex Banco Napoli buildings
Summary
Energy efficiency assessment is an evaluation process to promote the improvement of building energy performance starting from the information gathered during specific surveys or provided by owners and users about energy consumption required to maintain a specified indoor climate in terms of temperature and relative humidity [1]. Improving energy efficiency is considered one of the main strategies nationally and internationally for reducing greenhouse gas (GHG) emissions with acceptable economic costs [1]. Energy consumption in the building sector and the subsequent impacts mainly in terms of GHG and other pollutant emissions on the atmosphere are widely discussed [2]. The need to provide simple and clear methods to people and business operators about strategies and methods for improving energy efficiency is pointed out in many studies [1].
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