AHSRAE Winter Conference - February 2020 - Orlando
Currently, on-site combustion of fossil fuel plays a major role in meeting the heat load of residential and commercial buildings. The distribution and end use aspects are well established, reliable and efficient. With increasing interest in a more renewable future, can on-site fuel use continue to play a role? In this seminar, the outlook for the future growth of renewable gas, liquid and solid fuels was presented, as well as their potential for reducing greenhouse gas emissions from the built environment.
3 talks were given:
- Renewable Natural Gas for GHG Emission Reduction in the Built Environment
Presenting Author: Alex Fridlyand, Ph.D., Gas Technology Institute, Des Plaines, IL, USA
- Liquid Renewable Fuels
Presenting Author: Thomas Butcher, Ph.D., Brookhaven National Laboratory, Upton, NY, USA
- Growth of the Use of Biomass Solid Fuels: Technologies and Emissions
Presenting Author: Rebecca Trojanowski, Brookhaven National Laboratory, Upton, NY, USA
Patricia Fritz, New York State Department of Health, Albany, NY, USA
Seminar 6 (Intermediate)
Challenges Venting High Efficiency Appliances
Chair: Thomas Butcher, Ph.D., Brookhaven National Laboratory, Upton, NY
As we strive to achieve the highest levels of efficiency with fuel-fired boilers, furnaces and water heaters the low buoyancy creates challenges in the safe venting of flue gas. This seminar addresses these challenges specifically for sidewall and common venting.
1. Sidewall Venting of High Efficiency Equipment: How Close is Too Close
Larry Brand, Gas Technology Institute., Davis, CA
High efficiency gas fired furnaces, boilers and water heaters are generally installed with Category IV venting systems – positive pressure and condensing. In many retrofit cases, especially in multistory systems, the access to the roof for vent termination is not possible – an existing B vent may be installed in the chase or existing chimney and common-venting is not permitted. A sidewall vent is the only option, but there are restrictions. This presentation reviews the restrictions on sidewall venting in several national and local codes and investigates the potential for ice formation on sidewalls.
2. Common Venting High Efficiency Equipment
Tim McNulty, U.S. Draft Co., Fort Worth, TX
This presentation reviews the practice of common venting condensing or near condensing gas-fired appliances with respect to current ASHRAE guidelines, appliance manufacturers’ recommendations and code requirements. Although national guidelines have been developed for common venting Category I and draft hood-equipped appliances, there is no national standard for common venting condensing or near condensing appliances such as Category II and IV appliances. This presentation focuses on the current chimney design methodology along with the limitations as well as good practices related to common venting Category II and IV appliances.
Attend a Committee Meeting
ALL ASHRAE committee meetings, including this TC’s meetings at the Winter and Annual Society conferences, are open to the public at no cost nor is conference registration required. Interested visitors, local chapter members, and potential new TC members are always welcome. However to attend technical program sessions sponsored by the TC will require registration and payment of any applicable fee.
Participation in an ASHRAE TC provides the opportunity to grow professionally and to contribute to the advancement of HVAC&R within an international organization recognized for shaping the future of the built environment through research, standards writing, publishing, and education.