Scott Demark, President and CEO of Zibi Community Utility, joins thinkenergy to discuss how our relationship with energy is changing. With two decades of expertise in clean energy and sustainable development, Scott suggests reimagining traditional energy applications for heating and cooling. He shares how strategic energy distribution can transform urban environments, specifically how district energy systems optimize energy flow between buildings for a greener future. Listen in.

 

Related links

 

• Scott Demark on LinkedIn: https://www.linkedin.com/in/scott-demark-83640473/

• Zibi Community Utility: https://zibi.ca/

• Markham District Energy Inc: https://www.markhamdistrictenergy.com/

• One Planet Living: https://www.bioregional.com/one-planet-living

• Trevor Freeman on LinkedIn: https://www.linkedin.com/in/trevor-freeman-p-eng-cem-leed-ap-8b612114/

• Hydro Ottawa: https://hydroottawa.com/en

 

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Transcript:

Trevor Freeman  00:07

Welcome to thinkenergy, a podcast that dives into the fast, changing world of energy through conversations with industry leaders, innovators and people on the front lines of the energy transition. Join me, Trevor Freeman, as I explore the traditional, unconventional and up and coming facets of the energy industry. If you have any thoughts, feedback or ideas for topics we should cover, please reach out to us at thinkenergy@hydroottawa.com

 

Speaker 1  00:29

Hi everyone. Welcome back. One of the overarching aspects of the energy transition that we have talked about several times on this show is the need to change our relationship with energy, to rethink the standard way of doing things when it comes to heating and cooling and transportation, etc. This change is being driven by our need to decarbonize and by the ongoing evolution and improvement of technology. More things are becoming available to us as technology improves on the decarbonization front, we know that electrification, which is switching from fossil fuel combustions to electricity for things like space and water heating vehicles, etc, is one of the most effective strategies. But in order to switch out all the end uses to an electric option, so swapping out furnaces and boilers for heat pumps or electric boilers, switching all gas cars to EVs, etc. In order to do that in a way that is affordable and efficient and can be supported by our electricity grid, we need to think about multi strategy approaches, so we can't just continue to have this one way power grid where every home, every business, every warehouse or office tower satisfies all of its energy needs all the time directly from the grid with no adaptability. That isn't the best approach. It's not going to be affordable or efficient. We're not going to be able to do it fast enough. The multi strategy approach takes into account things like distributed energy resources, so solar and storage, etc, which we've talked about many times on this show, but it also includes approaches like district energy. So, district energy is rethinking how energy flows between adjacent buildings, looking for opportunities to capture excess energy or heat from one source and use that to support another. And that is the focus of today's conversation. To help us dive into this topic, I'm really happy to welcome Scott Demark to the show. Scott has been a champion of sustainability, clean energy solutions and energy efficiency in the Ottawa real estate and development industry for over 20 years now, he has overseen many high-performance development projects and was one of the driving forces behind the Zibi development in downtown Ottawa, and most applicable for today's conversation the renewable district energy system that provides heating and cooling to the Zibi site. Scott is the president and CEO of the Zibi community utility, as well as a partner at Thea partners. Scott Demark, welcome to the show.

 

Scott Demark  03:15

Thanks. Nice to see you. Trevor,

 

Trevor Freeman  03:17

So, Scott, why don't we start with definitions are always a good place to start. So, when we talk about a district energy system, give us a high-level overview of what exactly that means.

 

Scott Demark  03:27

Sure, a district energy system is, is simply the connection, or interconnection of thermal energy sources, thermal energy sinks. And so really, in practical terms. It means, instead of buildings having their own furnace and cooling system, buildings connect to a hydronic loop. A hydronic loop is just pipes filled with water, and then the heat or the cooling is made somewhere else, and that heat or lack of heat cooling is in a pipe. They push the pipe to the building, and then the pipe extracts the heat or rejects the heat to that loop. And so it's simply an interconnection of us as sources and sinks for federal energy.

 

Trevor Freeman  04:14

And I guess one of the important concepts here is that buildings often create heat, not just through a furnace or not just through the things that are meant to create heat, but, you know, server racks, computer server racks, generate a lot of heat, and that heat has to go somewhere. So oftentimes we're cooling buildings to remove heat that's being created in those buildings, and then other buildings nearby need to be heated in order to make that space comfortable. Is that fair to say?

 

Scott Demark  04:42

Yeah, absolutely. Trevor, so, an office building in the city of Ottawa, big old government office building, you'll see a pretty big plume on the roof in the winter time. That's not just kind of the flue gas from a boiler, but rather it is actually chillers are. running inside to make cooling, and they're just s