Preserving Envelope Efficiency in Performance Based Code Compliance

Thornton, Brian A.¹  Sullivan, Greg P.²  Rosenberg, Michael I.³  Baechler, Michael C.³ 

[1]Thornton Energy Consulting (United States)

[2]Efficiency Solutions (United States)

[3]Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

DOI  :  10.2172/1212245
RP-ID  :  PNNL--24359
PID  :  OSTI ID: 1212245
Others  :  Other: BT0201000

学科分类：能源（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

The City of Seattle 2012 Energy Code (Seattle 2014), one of the most progressive in the country, is under revision for its 2015 edition. Additionally, city personnel participate in the development of the next generation of the Washington State Energy Code and the International Energy Code. Seattle has pledged carbon neutrality by 2050 including buildings, transportation and other sectors. The United States Department of Energy (DOE), through Pacific Northwest National Laboratory (PNNL) provided technical assistance to Seattle in order to understand the implications of one potential direction for its code development, limiting trade-offs of long-lived building envelope components less stringent than the prescriptive code envelope requirements by using better-than-code but shorter-lived lighting and heating, ventilation, and air-conditioning (HVAC) components through the total building performance modeled energy compliance path. Weaker building envelopes can permanently limit building energy performance even as lighting and HVAC components are upgraded over time, because retrofitting the envelope is less likely and more expensive. Weaker building envelopes may also increase the required size, cost and complexity of HVAC systems and may adversely affect occupant comfort. This report presents the results of this technical assistance. The use of modeled energy code compliance to trade-off envelope components with shorter-lived building components is not unique to Seattle and the lessons and possible solutions described in this report have implications for other jurisdictions and energy codes.