Seminar 19: LIVESTREAM: Beneficial Electrification
Sunday, January 21
3:15 PM – 4:45 PM CST
Program Level: Intermediate Program Track: HVAC&R Systems and Equipment Session Type: Seminar Days: Sunday, January 21
Summary:
Electrification is a common topic on many building owners' agenda. Many owners are being pushed to decarbonize their building or campus. In some owners' mind, this mostly requires reducing the scope 1 (direct combustion in building or campus) emissions but this simple approach can cause scope 2 emissions to exceed the scope 1 savings, resulting in a net increase in carbon dioxide emissions. Heat pump systems, and specifically ground source heat pumps, in colder climates can accomplish a reduction or elimination of scope 1 emissions without increasing the resulting scope 2 emissions, i.e. beneficial electrification.
Chair:
Svein Morner
Technical Committee:
2.8 Building Environmental Impacts and Sustainability
Co-Sponsoring Committee:
6.8 Geothermal Heat Pump and Energy Recovery Applications
Other Sponsoring Committee:
4.2 Climatic Information
Seminar 19: Presentation 1: Beneficial Electrification of Mcfarland, WI Public Safety Building
Sunday, January 21
3:15 PM – 3:35 PM CST
Beneficial Electrification of Mcfarland, WI Public Safety Building
Presenting Author: Andrew DeRocher, HGA, Minneapolis, MN, United States
McFarland (climate zone 6) Public Safety Building was designed and constructed to be an all electric net zero energy facility. This presentation will describe the net-zero energy journey through the design, construction and operation and share the successes as well as the lessons learned throughout this process. Andy will discuss how the heating load was minimized and the renewable energy systems was sized to generate enough energy to cover the heating load which is typically the biggest challenge when creating net zero energy facilities in northern climates.
Seminar 19: Presentation 2: Comed Schools Electrification
Sunday, January 21
3:35 PM – 3:55 PM CST
Comed Schools Electrification
Presenting Author: Andrew Wiegand, MichaelsEnergy, La Crosse, WI, USA
There are six general categories to the Illinois public schools carbon free assessment program. The program aims to show multiple carbon solutions for each school. All are important but schools appear generally drawn toward one of them; solar. Ignoring all else because of their general lack of public appeal, or sticker shock.
Energy Efficiency, HVAC Electrification, Insulation, WELL, electric vehicles, are included but hurdles such as electric load, time commitments, cost, and personnel appear too big.
The way to get to carbon neutral is using multiple paths. If schools concentrate on only solar, carbon neutrality will be hard to reach.
Seminar 19: Presentation 3: Dunkelflaute (Dark Doldrums) Defrosting of Air-Source Heat Pumps
Sunday, January 21
3:55 PM – 4:15 PM CST
Dunkelflaute (Dark Doldrums) Defrosting of Air-Source Heat Pumps
Presenting Author: Eric Peterson, PhD, PE, CEng, Visiting Research Fellow-Univ. of LEEDS, Leeds, West Yorkshire, United Kingdom
This presentation will address cold climatic constraints of air-source heat-pump (ASHP) operation that may improve the business case for drilling geothermal heat exchangers. ASHP evaporators need to be repeatedly reverse-cycled to pulse hot gas through “evaporators” to defrost frozen condensate during conditions of gloomy fog to 6°C. Frost build-up on air source heat exchanger surface decrease the system coefficient of performance (COP). Unfortunately, such gloomy fog conditions coincide with failure of renewable energy generation from rooftop solar and off-site windfarms.
Seminar 19: Presentation 4: Comprehensive Decarbonization Planning for Diverse County-Owned Buildings
Sunday, January 21
4:15 PM – 4:35 PM CST
Comprehensive Decarbonization Planning for Diverse County-Owned Buildings
Presenting Author: Russell Knudson, pe, HGA, Minneapolis, MN, United States
Owners and operators of large real estate portfolios have the greatest opportunity in the global effort to combat climate change by decarbonizing their operations. Determining the highest value properties to focus a decarbonization effort requires forethought, planning, and an ability to continually re-focus the effort to other buildings. We will present the methods used to solicit, structure, evolve, and accomplish a comprehensive energy/emissions capital planning study of over one million square feet. The study resulted in a long-range decarbonization capital plan that includes approximately 2,800 tons CO2e mitigated annually, $17 million in IRA incentives, and $2 million in energy savings.
