Effects of Building Energy Efficiency Measures on Air Quality at the Neighborhood Level in Athens, Greece

Natasha Frilingou,Demetri Bouris

doi:10.3390/en13215689

Abstract

The high concentration of pollutant sources, complex topography, and regional meteorology are all factors that may contribute to air episodes in dense urban areas. Energy use in buildings is a significant source of pollution in the Greater Athens Area (GAA), Greece, where over 90% of the existing building stock has been classified below energy class B. The present study focuses on the potential effects that a realistic level of building energy efficiency upgrades will have on the air quality over the GAA. Results are expected to be relevant to similar urban areas. Furthermore, the study of primary pollutants’ dispersion is applied at a 1.2 × 1.2 km spatial resolution, providing significant local (neighborhood) level information. Numerical simulations were performed using EPA’s CALPUFF modeling system with wind field input from an independent numerical weather prediction using NCAR’s Weather Research and Forecasting (WRF) model. In order to calculate emission rates from major roads, highways, shipping ports, residential heating installations, and major industrial facilities, data were taken from National and European statistics, demographics, and local topography. After validation, the modeling system was used to examine three building energy efficiency upgrade scenarios, implemented on 20% of the buildings. Ground level concentrations of SO2, NOx, CO, and PM10 were calculated and reductions of up to 9% were found for GAA maximum values but up to 18% for local values that were also close to or above the European safety thresholds.

Highlights

Around one-quarter of Europeans are exposed to air pollutant levels exceeding some EU air quality standard [1] in urban areas
Ground level concentrations of SO2, nitrogen oxides (NOx), carbon monoxide (CO), and PM10 were calculated and reductions of up to 9% were found for Greater Athens Area (GAA) maximum values but up to 18% for local values that were close to or above the European safety thresholds
Monitoring stationfrom details, where measurements and simulations are compared for model validation

Summary

Introduction

Around one-quarter of Europeans are exposed to air pollutant levels exceeding some EU air quality standard [1] in urban areas. Many efforts have been made to understand the conditions causing air pollution episodes, air pollutants’ accumulation and long-term exposure to them, and domestic heating in particular has been the focus subject of many such studies. An early study [4] investigated the effectiveness of domestic heating reduction scenarios on urban air quality by applying an EPA dispersion model (ISC-ST) on emission inventories in an urban setting. In another study [5], the overall effect of fuel and heating system options on pollutant emissions as well as energy use and the economy were considered

Methods

Results

Discussion

Conclusion