Paper Conference

Proceedings of uSim Conference 2018: 1st uSim Conference of IBPSA-Scotland

     

TOWARDS PERFORMANCE BASED VALIDATION OF THE U.S. CLIMATIC ZONING BASED ON THE ASHRAE STANDARD 90.1-2013

Angelica Walsh, Daniel Cóstola, and L.C.Labaki

Abstract: Climatic zoning is often adopted in building energy regulation, having therefore a direct impact in the energy performance of urban areas. Currently, most countries adopt simplified weather parameters to define their climatic zoning, being the degree-days method one of the most widely used. The widespread use of degree-days has been substantially influenced by the adoption of this indicator by ASHRAE. ASHRAE standards establish different requirements for buildings according to the corresponding climatic zone. However, there is no scientific evidence regarding the agreement between building energy performance and the ASHRAE climatic zones. In such a context, this study analyses the climatic zone described in ASHRAE 90.1-2013 using a performance-based assessment method. This method relies on building energy simulation and geographic information systems to assess the match between energy performance and zoning boundaries. The study was focused on the States of Florida, Georgia and Tennessee and climatic zoning performance indicators were calculated based on cooling and heating energy demand of four archetype buildings. Simulations were performed using EnergyPlusV8.3 and post-processed using ArcGIS. Results of this pilot study suggest that 16% of the area of these States is misclassified, potentially affecting highly populated areas. These results indicate the need for further studies using more archetypes that can better represent the whole building stock, preferably complying with the latest version of ASHRAE 90.1, supporting further improvements of this standard. Keywords: Climatic zoning, building energy performance, degree-days.
Pages: 14 - 21
Paper:
usim2018_033