Agenda: | SAPHIRE Agenda re: Petersham Center School Renewable Thermal Study
1. Introductions
2. Overview of DOER Renewable Thermal programs and initiatives (Rob)
3. Brief recap of SAPHIRE Program goals & timelines (Elise)
4. Update on efficiency work and/or planned near-term upgrades (Linda)
o Insulation, Air Sealing, EMS Controls
o DHW Upgrade: Upgrade to Propane-fired DHW Heating
o Timeline and goals for heating system upgrade
5. Review comments/concerns (Josh’s email from 12/9/14)
o Biomass
Biomass pellet suppliers & availability (Rob)
Commercial pellet boiler mechanical service in Worcester county (Rob/Bart)
Visiting biomass installations in New England (Rob)
Need for oil/propane redundancy, vs. peaking backup vs. 100% wood-fired (Bart/Rob)
o Solar Thermal (Elise)
Price estimates, revision needed?
• CEC programs see average install costs of $10,000 for 2-collector systems (The proposed system here is 6 collectors, at $7008)
Drainback vs. Steamback approach
• Drainback more common, few steamback installed in MA. Maintenance on a glycol system is not costly and needed infrequently
ASME certifications for DHW tanks
Water temperature requirements, consideration of evacuated tubes
How will payback economics differ when factoring in DHW upgrades?
6. Brief Overview of Renewable Thermal Options evaluated (Bart):
Full Cost Payback (years) Net Cost After SAPHIRE Grant (Est.) Payback After Grant (Years) Notes/Concerns
RTM 1 Hybrid Pellet & Existing Oil Boiler $229,705 15.3 $47,426 3.2 -Feasibility of reusing existing boiler and condition/efficiency
RTM 2 Hybrid Pellet & New Propane $298,927 19.4 $64,732 4.2
RTM 3 100% Wood Pellet $330,451 20.7 $72,631 4.6
RTM 4 GSHP & Existing Oil Hybrid System $556,630 39.1 $330,630 23.2 -Higher upfront cost
-KWH $ Increase
RTM 5 GSHP & Propane Hybrid System $634,810 43.1 $408,810 27.7
RTM 6 Solar Domestic Hot Water $32,855 43.3 $20,175 26.6*
*Assumed to be pre-heat -Steamback vs. drainback
-Interaction with recently completed DHW ECM
-ASME Ratings
-Temperature
7. Questions/Concerns
8. Wrap up |