btec nyserda pellet storage stakeholder session # 3 · pdf filebtec nyserda pellet storage...

BTEC/NYSERDA Off-Gassing Project
BTEC NYSERDA Pellet Storage Stakeholder Session # 3
1 PM ET J l 23 20131 PM ET, July 23, 2013This Webinar is brought to you by:
Biomass Thermal Energy Council (BTEC) and the New York State h d l h ( )Energy Research and Development Authority(NYSERDA)
1

Quick notesTwo Audio Options: Streaming Two Audio Options: Streaming Audio and Dial-In.1. Streaming Audio/Computer
Speakers (Default)2 Dial In: Use the Audio Panel2. Dial-In: Use the Audio Panel
(right side of screen) to see dial-in instructions. Call-in separately from your telephone.
Ask questions using the Questions Panel on the right side of your screen.
The recording of the webinar and the slides will be available after the event. Registrants will be notified by emailnotified by email.

Speakers
Joseph Seymour, Biomass Thermal Energy
CouncilCouncil
Ray Albrecht, Biomass Thermal Energy
Council
Dr. Alan Rossner, Clarkson University
Dr. Philip Hopke, Clarkson University
Tim Cullina, Fauske & Associates
3
Cu a, aus e & ssoc ates

Presentation OutlineI. Project overview and survey resultsSeymour
II. Update on ventilation techniquesAlbrecht
IV. Preliminary results of wood pellet storage research
Hopke & Rossner
V E l f i l ti f t d ti V. Examples of implementing safety recommendations
Cullina
VI Q&A SeymourVI. Q&A Seymour
4

Joseph SeymourExecutive Director, Biomass Thermal Energy Council
P j t O i d S Project Overview and Survey Results
5

About BTECThe Biomass Thermal Energy Council (BTEC) is the industry trade association dedicated to advancing the use of biomass for heat and other thermal energy applications.
Why was BTEC established?1. To advocate for and promote the biomass thermal industry in the
national energy policy debate2 T h t t d d t th bli d d i i k th 2. To reach out to and educate the public and decision makers on the
benefits and advantages of using biomass for heat and CHP3. To develop biomass energy research and analysis that enables
sound investment and policy decisions 1. Technical and Regulatory Affairs Committee (TRAC) created to
help address safety and regulatory concerns, increase markets2. Member-led3 Will assist NYSERDA project when needed
6
3. Will assist NYSERDA project when needed

About the Pellet Storage Surveyg y
Online, conducted mid-April 2013 to June 2013Distributed through BTEC/PFI networksDistributed through BTEC/PFI networksNational and regional breakdown
Natl 18 respondentsNE - 13 respondentsp
Preliminary findings, limited responses, warrants further study
Use for descriptive purposesp p pComplete results available at conclusion of projectOption of conducting annually

Fuel Type
Wood Pellets Sold/Used for Bulk Delivery
39% Softwood39% Softwood22% Hardwood44% Blend of Softwood and Hardwood
(some are a combination of the three)
8

3035
Frequency of Bulk Pellet Deliveries
15202530
05
105
Percent
Once a Week
Once Every Two
Weeks
Once Every Month
Once Every Two Months+

Typical Pellet Storage Size
46%
40%
45%
50%
25%
30%
35%
40%
8%
15% 15%
8%10%
15%
20%
25%
0% 0% 0%0%
5%
1 ton bulk 2 ton bulk 3 ton bulk 10 ton bulk 20 ton bulk 40 ton bulk 1 ton pallet, 40 lb bag
2 ton pallet, 40 lb bag
Typical Pellet Storage SizeTypical Pellet Storage Size

OtherI d O tdIndoor vs. Outdoor
1-25% of reported serviced consumers have outdoor systems5 and 10 ton storage were most common
75-99% have indoor systems75 99% have indoor systems3 ton storage was most common
VentilationMost Common
Vented cap on filling pipes
Also usedOpen window/vent or mechanical active ventilation system
Safety/Warning Signage69% indicated that warning signs are in use15% said no or did not know15% said no or did not knowThe remainder sometimes use safety/warning signs depending on the application

BTEC/NYSERDA CO Off-Gassing Project
Ray AlbrechtTechnical Consultant, Biomass Thermal Energy Council
Update on Ventilation pTechniques
12

UpdateonBTEC/NYSERDAProject
VentilationinBulkPelletStorage
For
ResidentialandCommercialPelletfiredBoilerSystems
R d J Alb ht P ERaymondJAlbrecht,P.E.TechnicalAdvisorBiomassThermalEnergyCouncil(BTEC)
[email protected]

InformationGatheringRelatingtoPoliciesandStandards
Austria,Germany,SwedenandCanada
EnglishtranslationofAustrianM7137standardfordeliveryandstorageofbulkpellets
TechnicalresourcefordevelopmentofUSpguidelines

InformationGatheringRelatingtoPoliciesandStandards
Austria,Germany,SwedenandCanada
EnglishsummarytranslationofGermang yVDI3464pelletstoragestandard

Bioenergy 2020gy
TechnicalResearchReports

Sample Graph of CO Formation Rate vs TimeSampleGraphofCOFormationRatevs Time
LaboratoryTesting
COformationrateinmgCOperkgofpelletsper24hrs
Mostpelletsamplesshowlessthan1mg/kgconversiontoCOperdaybutoccasionalhigherratesupto3mg/kghavebeenmeasuredwithsomesamplesofsoftwoodpelletssa p es o so t ood pe ets
Rapiddropafterinitialperiod
Ventilationneedstomeetpeaki t f fi t 1 2 krequirementsforfirst1or2weeks
afterdelivery
LongertermCOformationratetypicallylessthan10%ofpeak

COFormationRateinSamplesofFreshSoftwoodPelletsp
Bioenergy 2020 Austria
StrongmajorityofpelletsampleshavelowerCOformationrates
Butexceptionsoccur scienceofCOformationnotfullyunderstood
Nodatayetforhardwoodpellets
NodataforUSpellets

European Recommendation for Pellet Storage Ventilation
14,0
EuropeanRecommendationforPelletStorageVentilation
TargetCOconcentrationof30ppm in
10,0
12,0
1/
h]
VPellets : VAir 1:1VPellets : VAir 1:2VPellets : VAir 1:3VPellets : VAir 1:15
storagecompartment
Summary:
1 mph crossventilation airflow
6,0
8,0
an
ge
rate
n [
1 1mphcross ventilationairflowthrougha4inchopeningprovides30ppm COlevelforstoragesystemfilledwith5tonsofworstcase(3mgCOperkgpelletsper24hrs)pellets
2 0
4,0
Air
exch
a
Airflow=4cfm
About5%oftypicalbathroomexhaustfanvolume
0,0
2,0
0,01 0,1 1 10Emission rate CO [mg/ kg fuel] in 24 h
7inchdiameteropeningtomaintain9ppm instoragecompartment
slide 19

VentilatedFillCaps LaboratoryTestingResults
Twistoncapswithventilationslots
Primarydrivingforceforairexchangeisdifferenceintemperature(insidestoragecompartment outside)
h f l f ll
rexcha
ngerate[m
/h] Graphoftestresultsfor8mpelletstorage
silo withventilatedcapsand1meterlengthfillpiping
Airflowat5degCtemperaturedifferenceis OK for majority of pellet reactivity levelsAir isOKformajorityofpelletreactivitylevels
Butaverageairflowatzerotemperaturedifferenceonly2ft3perhourcomparedtorecommendedventilationrateof4ft3perminute for most reactive pelletsminuteformostreactivepellets

ComparisonofAirtightStorageWithandWithoutVentilatedCaps
LaboratoryTestingResults
ReducedCOconcentrationsinpelletstoragewithventilatedcaps
Butadditionalopeningsneededtoachieve30ppm inairtightstoragecompartments
Moreeffectiveventilationcouldbeaccomplishedwithvarietyofcombinedwind/temperaturedrivenpassiveopeningsincludingintegratedfill i / til ti th ll fittifillpipe/ventilationthruwallfittingssimilartosealedcombustionairsupply/exhaustterminationsforgasfiredappliance

Pellet Storage CO ConcentrationPelletStorageCOConcentration
VentilatedCapwithSupplementalOpening
Bioenergy 2020
StillhasinitialCOconcentrationpeakbutequilibriumvaluenearzeroppm withsupplementalopening
MoreeffectivecrossventilationorlargersingleopeningwouldreduceoreliminateinitialpeakconcentrationofCO
Blue =VentilatedCaponly
Green = Ventilated Cap plus Supplemental OpeningGreen VentilatedCapplusSupplementalOpening

InternationalPelletSafetyWorkshop
OrganizedbyEuropeanPelletCouncil BTECisnowobservingmember
70participantsfromEuropeandUS/Canada
27discussiongroupsover3days
Pelletproduction,transportandstorage
Reportavailableatwww.pelletcouncil.eu
Industry database and blog to be posted onlineIndustrydatabaseandblogtobepostedonline
2nd WorkshopplannedforMayorJune2014

UpcomingPelletStorageProjectTasks
SafePelletProjectWorkshop Austria
Briefingforgovernmentagencies
Finalreport
Technicalarticleforbiomasspublication

BTEC/NYSERDA CO Off-Gassing Project
Dr. Philip Hopke
Dr. Alan Rossner Professors, Clarkson Universityy
Preliminary Results of yWood Pellet Storage Research
25

CO Monitoring ProjectCO Monitoring Project
Philip K. Hopke and Alan RossnerInstitute for a Sustainable Environment
Clarkson [email protected]@clarkson.edu

btec nyserda pellet storage stakeholder session # 3 · pdf filebtec nyserda pellet storage...

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