What cost-effective options are available for building owners interested in reducing their building’s energy use? CEE's Director of Engineering Services, Mark Hancock, P.E., will discuss rooftop unit retrofits as a scalable energy-saving approach and recommend next steps.
Experts explain new multifamily auditing techniques, their scalability, what makes the energy savings cost-effective, where the programs can be most successful, and what non-energy benefits result from this work.
NASA Net Zero Roadmap: Federal Utilities Partnership Working Group, November ...Shanti Pless
A summary presentation of NASA's Net Zero Roadmap. The roadmap, available at http://www.nrel.gov/docs/fy15osti/60838.pdf, provides strategic, operational, and tactical level proficiencies necessary for NASA to implement to successfully reach net zero by 2020. Slides posted at FUPWG's site at http://energy.gov/eere/femp/downloads/fupwg-fall-2014-agenda-and-presentations.
Original presentation by Glenn Friedman and presented to the Illinois Chapter of ASHRAE at the May 10 monthly meeting by Michael Kuk of Sieben Energy Associates.
CEE and Seventhwave lead a rapid-fire discussion of innovative tech and program approaches, and the most meaningful recent research findings for utility representatives, efficiency program implementers, and both residential and commercial field experts.
Engagement Coordinator Megan Hoye gave a presentation on CEE's research projects to the American Institute of Architects Minnesota's, Committee on the Environment.
Experts explain new multifamily auditing techniques, their scalability, what makes the energy savings cost-effective, where the programs can be most successful, and what non-energy benefits result from this work.
NASA Net Zero Roadmap: Federal Utilities Partnership Working Group, November ...Shanti Pless
A summary presentation of NASA's Net Zero Roadmap. The roadmap, available at http://www.nrel.gov/docs/fy15osti/60838.pdf, provides strategic, operational, and tactical level proficiencies necessary for NASA to implement to successfully reach net zero by 2020. Slides posted at FUPWG's site at http://energy.gov/eere/femp/downloads/fupwg-fall-2014-agenda-and-presentations.
Original presentation by Glenn Friedman and presented to the Illinois Chapter of ASHRAE at the May 10 monthly meeting by Michael Kuk of Sieben Energy Associates.
CEE and Seventhwave lead a rapid-fire discussion of innovative tech and program approaches, and the most meaningful recent research findings for utility representatives, efficiency program implementers, and both residential and commercial field experts.
Engagement Coordinator Megan Hoye gave a presentation on CEE's research projects to the American Institute of Architects Minnesota's, Committee on the Environment.
Blake Lapthorn's green breakfast with guest speaker Keeran Jugdoyal, Faithful...Blake Morgan
On Wednesday 13 November 2013, Blake Lapthorn's climate change team hosted a green breakfast seminar. Guest speaker Keeran Jugdoyal, Mechanical Engineering Manager at Faithful+Gould, talked about the lessons his company has learnt about the end use of sustainable buildings.
Highlights of the Kuwait HVAC&R Conference 2017Swati Warang
A brief-overview of the highlights of the 2nd kuwait HVAC&R Conference, a confluence of ideas to improve HVAC system efficiency and implement best practices in construction.
This webinar gives a technical overview of the field assessment, measured energy savings, occupant feedback, and evaluation of cost-effectiveness of transport membrane humidifier (TMH) technology.
• Electricity Incentivisation Scheme (EIS) at the University of Cambridge
• Design of Engineering’s Data Centre cooling system
• Energy use from 2010 onwards
• Next steps
Green building concepts and good building practicesManohar Tatwawadi
The power sector must adopt the green building concepts and go for good building practices. In fact all industries need to go for the same. The same practices can also be adopted in all commercial as well as residential buildings.
This is the second in a series of 'Show and Tell' webinars from the Ofgem Strategic Innovation Fund Round 1 Discovery phase, covering the Heat projects.
Consumers need better access to low-carbon heating options which remain reliable and affordable in comparison to existing solutions. For many domestic, commercial, and industrial end consumers, heat comprises a considerable proportion of their energy bills.
There are a variety of technologies which could potentially contribute to heat decarbonisation. These include heat networks, electric and hybrid heat pumps, hydrogen, biofuels and others.
As examples, you will hear from SIF projects working on developing the gas networks to adapt to hydrogen, and electricity networks exploring the use of thermal energy storage as a source of flexibility.
The Strategic Innovation Fund (SIF) is an Ofgem programme managed in partnership with Innovate UK, part of UKRI. The SIF aims to fund network innovation that will contribute to achieving Net Zero rapidly and at lowest cost to consumers, and help transform the UK into the ‘Silicon Valley’ of energy, making it the best place for high-potential businesses to grow and scale in the energy market.
For more information on the SIF visit: www.ofgem.gov.uk/sif
Or sign-up for our newsletter here: https://ukri.innovateuk.org/ofgem-sif-subscription-sign-up
This presentation explores the challenges and opportunities in achieving energy savings in multifamily buildings from an “on the ground” perspective. Utilizing case studies and examples from recent CEE research and energy efficiency programs, this presentation provides an overview of technologies and strategies that have proven to be effective and marketable energy efficiency measures in MN multifamily buildings, including; ventilation system retrofits, optimizing boiler control systems, optimizing condensing boilers, retrofitting trash chutes, and adding demand-based controls to domestic hot water recirculation pumps.
Leveraging existing home inspections at time-of-sale to promote energy upgrades. Presentation given at ACEEE 2018 Summer Study on Energy Efficiency in Buildings.
As the mantra to "electrify everything" intensifies, we'll need to develop a clear understanding of what that goal means and what it will take to get us there. Electrification may be our only practical pathway to decarbonization, but that doesn't reduce the need for a keen awareness of what we're undertaking.
This forum brought in speakers from both Minnesota and around the country to talk about a range of electrification topics including emerging tech, an evolving grid, ongoing natural gas reliance and electric innovations.
Energy Fit Homes is a certificate program administered by the Center for Energy and Environment, designed specifically for existing homes in Minnesota and is focused exclusively on energy efficient upgrades that are cost-effective to the homeowner.
The presentation includes background information on building science and the benefits of Energy Fit Homes for both homeowners and Realtors®. Real estate professionals who attended the presentation received the tools needed to start integrating the program into their Realtor® client services.
There’s growing awareness that perhaps the only practical pathway to achieving Minnesota’s deep decarbonization goal is through a combination of steps.
Research lead discusses how new generation air source heat pumps perform in Minnesota’s colder climate, how to best integrate air source heat pumps into utility efficiency programs, and how this new technology has the potential to create new business opportunities in the building and design world.
Research identifying common issues affecting the effectiveness of Energy Recovery Ventilation in Minnesota buildings and developing a protocol to optimize their performance.
Webinar sharing report findings including aerosol sealing cost-effectiveness in multifamily buildings and recommendations on how utilities and contractors can take advantage of this new sealing application.
Technical overview of the research questions and findings as well as a discussion of targeted recommendations for utility energy efficiency programs and operator learning.
Optimizing Existing Rooftop Unit Energy Efficiency
1. OPTIMIZING EXISTING ROOFTOP UNIT EFFICIENCY
A Study Focused on Cold Climate Conditions
Mark Hancock, P.E. |
Center for Energy & Environment
Webinar: November 12, 2014
4. Pg. 4
Current Field Research Projects
In Progress
•Improved Effectiveness of Commercial ERVs
•Condensing Boiler Optimization
•Optimized Operation of Pool Facilities
•Reducing Commercial Building Duct Leakage
•Multi-Family Building Envelope Aerosol Sealing
•Effective Ventilation in Multi-Family Buildings
•Secondhand Smoke Exposure in Vehicles
•DOE Building America | Retrofit Water Heating
•DOE Building America | Combi-System Measure Guidelines
•DOE Building America | Combustion Safety Guidelines
•DOE Building America | Demonstration House
2013-14 Archived Webinars & Upcoming Publications
•Window Retrofit Technologies
•Large Building Air Leakage
•Tankless Water Heaters
•Heat Pump Water Heaters in MN
•Optimization of Existing RTUs
•Combi Systems
5. Pg. 5
Current Field Research Projects
In Progress
•Improved Effectiveness of Commercial ERVs
•Condensing Boiler Optimization
•Optimized Operation of Pool Facilities
•Reducing Commercial Building Duct Leakage
•Multi-Family Building Envelope Aerosol Sealing
•Effective Ventilation in Multi-Family Buildings
•Secondhand Smoke Exposure in Vehicles
•DOE Building America | Retrofit Water Heating
•DOE Building America | Combi-System Measure Guidelines
•DOE Building America | Combustion Safety Guidelines
•DOE Building America | Demonstration House
2013-14 Archived Webinars & Upcoming Publications
•Window Retrofit Technologies
•Large Building Air Leakage
•Tankless Water Heaters
•Heat Pump Water Heaters in MN
•Optimization of Existing RTUs
•Combi Systems
6. Pg. 6
Current Field Research Projects
In Progress
•Improved Effectiveness of Commercial ERVs
•Condensing Boiler Optimization
•Optimized Operation of Pool Facilities
•Reducing Commercial Building Duct Leakage
•Multi-Family Building Envelope Aerosol Sealing
•Effective Ventilation in Multi-Family Buildings
•Secondhand Smoke Exposure in Vehicles
•DOE Building America | Retrofit Water Heating
•DOE Building America | Combi-System Measure Guidelines
•DOE Building America | Combustion Safety Guidelines
•DOE Building America | Demonstration House
2013-14 Archived Webinars & Upcoming Publications
•Window Retrofit Technologies
•Large Building Air Leakage
•Tankless Water Heaters
•Heat Pump Water Heaters in MN
•Optimization of Existing RTUs
•Combi Systems
7. Pg. 7
Current Field Research Projects
In Progress
•Improved Effectiveness of Commercial ERVs
•Condensing Boiler Optimization
•Optimized Operation of Pool Facilities
•Reducing Commercial Building Duct Leakage
•Multi-Family Building Envelope Aerosol Sealing
•Effective Ventilation in Multi-Family Buildings
•Secondhand Smoke Exposure in Vehicles
•DOE Building America | Retrofit Water Heating
•DOE Building America | Combi-System Measure Guidelines
•DOE Building America | Combustion Safety Guidelines
•DOE Building America | Demonstration House
2013-14 Archived Webinars & Upcoming Publications
•Window Retrofit Technologies
•Large Building Air Leakage
•Tankless Water Heaters
•Heat Pump Water Heaters in MN
•Optimization of Existing RTUs
•Combi Systems
8. Pg. 8
Current Field Research Projects
In Progress
•Improved Effectiveness of Commercial ERVs
•Condensing Boiler Optimization
•Optimized Operation of Pool Facilities
•Reducing Commercial Building Duct Leakage
•Multi-Family Building Envelope Aerosol Sealing
•Effective Ventilation in Multi-Family Buildings
•Secondhand Smoke Exposure in Vehicles
•DOE Building America | Retrofit Water Heating
•DOE Building America | Combi-System Measure Guidelines
•DOE Building America | Combustion Safety Guidelines
•DOE Building America | Demonstration House
2013-14 Archived Webinars & Upcoming Publications
•Window Retrofit Technologies
•Large Building Air Leakage
•Tankless Water Heaters
•Heat Pump Water Heaters in MN
•Optimization of Existing RTUs
•Combi Systems
9. Pg. 9
Current Field Research Projects
In Progress
•Improved Effectiveness of Commercial ERVs
•Condensing Boiler Optimization
•Optimized Operation of Pool Facilities
•Reducing Commercial Building Duct Leakage
•Multi-Family Building Envelope Aerosol Sealing
•Effective Ventilation in Multi-Family Buildings
•Secondhand Smoke Exposure in Vehicles
•DOE Building America | Retrofit Water Heating
•DOE Building America | Combi-System Measure Guidelines
•DOE Building America | Combustion Safety Guidelines
•DOE Building America | Demonstration House
2013-14 Archived Webinars & Upcoming Publications
•Window Retrofit Technologies
•Large Building Air Leakage
•Tankless Water Heaters*
•Heat Pump Water Heaters in MN
•Optimization of Existing RTUs
•Combi Systems
10. Pg. 10
Today’s Presenter
•With CEE since 1987
•Specializes in existing building commissioning and HVAC field diagnostics
•Former program director for the Public Buildings Enhanced Energy Efficiency Program (2009 – 2014)
Mark Hancock, P.E. Director of Engineering Services
11. Pg. 11
This project was supported by a grant from the Minnesota Department of Commerce through the Conservation Applied Research and Development (CARD) program.
12. OPTIMIZING EXISTING ROOFTOP UNIT EFFICIENCY
A Study Focused on Cold Climate Conditions
Mark Hancock, P.E. |
Center for Energy & Environment
Webinar: November 12, 2014
14. Pg. 14
RTU Market
•46% of all commercial space conditioned by RTU’s
•2.7 billion ft2 of commercial retail floor space (CBECS 2003)
•Wide variety of applications
•Office
•Commercial
•Manufacturing
•Industrial
•Warehouse
•Retail
•Medical
15. Pg. 15
RTU’s are widely used
Source: Google maps
5 RTU’s
6 RTU’s
16. Pg. 16
RTU’s are widely used
Source: Google maps
20 RTU’s
17. Pg. 17
RTU’s are widely used
Source: Google maps
50 RTU’s
18. Pg. 18
Why RTU’s
•Packaged units
•Integration of heating and cooling in a single unit
•Reliability
•Low initial cost
•Wide range of sizes to meet requirements of the space
•Plug and Play
•Network of trained installers and service technicians
21. Pg. 21
What’s the problem with RTU?
•Generally RTUs operate inefficiently
•Standard efficiency
•Constant speed
•No options for advanced controls
•Lack of maintenance
•Compacted design results in challenges for control
•Stand alone control
•Settings conflict with neighboring RTU
•Schedules (if used) don’t match space requirements
•Often over sized
•Pick and place from manufacture
22. Pg. 22
Goals of our study
•Evaluate advanced RTU control strategies
•For efficiency
•For cost effectiveness
•For large scale delivery for CIP offering
•Confirm savings found by other projects
•Small projects in very different climates
•What are the savings in Minnesota?
•Collect performance data
•Target 60 RTUs
•Collect data that spans MN winter and summer conditions
34. Pg. 34
Manufactures Claims
•Premium Ventilation
•18% to 44% of HVAC use (vary regionally)
•Source “Unitary HVAC Premium Ventilation Upgrade” Reid Hart 2011
•Digi-RTU
•40% to 60% reduction in energy
•30% to 60% decline in demand
•Source Bes-Tech / Digi-RTU website
•Catalyst
•25% to 50% reduction in Energy use
•Source Transformative Wave / Catalyst website
38. Pg. 38
How we collected data
•Internet connected data loggers
•For data collection
•For control
•Flip/Flop Test protocol
•Allowed for collection of two years of data in one year
•Accounted for changes in the building
•Occupied times
•Production
•Staffing
Standard
Optimized
S
S
O
S
S
O
S
S
S
S
O
O
O
O
O
Year one
Year two
42. Pg. 42
Analysis
•Primary Objectives
•Estimate electric and gas use with and without optimizers
•Estimate savings from optimizers
•Compare savings between optimizer technologies
•Estimate savings for each site
•Calculate simple payback
•Based in measured data and installed costs
•Develop energy savings calculator
•Secondary Objectives
•Analyze IAQ and indoor comfort with and without optimizers
59. Pg. 59
Key Findings
•All technologies achieved significant electric savings
•Gas savings were negative or statistically insignificant
•Savings were highly variable
•Fan settings and minimum OA dampers settings were not consistent
•Advanced controls did not achieve cost-effective energy savings
•Larger units with more operation would improve cost effectiveness
60. Pg. 60
Key Findings
•Control Units were affected by Optimizers
•Best optimizer for a space depends on situation
•“One size does not fit all”
•Market is rapidly expanding
•New innovation
•Product maturity
•Contractor support critical to success of products
•Products tested had issues with MN Climate (Zone 6)