"The Water-Energy Nexus and "Carbon-Emission based Building Systems Design" - SFBA Chapter

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This is a recording of a San Francisco Bay Area Chapter event, held on October 17, 2018.

Presentation 1: Water- Energy Nexus

This presentation is about benchmarking and whole building modeling strategies for water consumption. The effects of various conservation strategies on overall water consumption and common water modeling challenges are discussed. The presentation also provides resources for improved water consumption model accuracy. The second part of the presentation highlights the interface of HVAC systems and water consumption in buildings. Through a case study of a northern California commercial office building, the limitations of modeling indirect-direct evaporative cooling using IES-VE  are discussed. Further, the results from IES-VE are compared to the findings from a custom-developed spreadsheet tool to assess the cooling coil load reduction after a two-stage evaporative cooling.


Kylie Zhao, PE, Affiliated Engineers Inc.
Megan Gunther, PE, LEED AP, WELL AP, Affiliated Engineers, Inc. 

Presentation 2: Carbon-Emission based Building Systems Design

High performance design presents a significant opportunity to reduce energy use and carbon dioxide emissions. As we move towards an all-electric future with zero or low carbon buildings through decarbonization of the electric supply grid, it becomes imperative to evaluate building system design based on a sophisticated time-of-use optimization approach instead of simplified annual calculations. Atelier Ten developed a spreadsheet based tool, which uses hourly greenhouse gas emission profiles from WattTime. This tool was used to inform building design on a California based project to optimize design based on greenhouse gas emissions as a metric, as opposed to energy costs. Along with talking about the tool itself, the presentation also talks about the motivation and intent of developing this tool and it’s further development to perform a robust carbon based analysis.


Henry Richardson, Wattime
Te Qi, Atelier Ten