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ThefirstPassivhaus ArchiveintheUKHARCHerefordPresentedat:The20th InternationalPassivhaus ConferenceDarmstadtAECBAnnualConferenceNorwichJuly2016
NickGrantAlanClarkeElementalSolutions
@ecominimalnick@AR_Clarke
Architect: Architype Ltd, Contractor: Kier Construction, M&E Consultants: E3, Cost Consultants: Arcadis, Energy & Environment: Alan Clarke and Nick Grant, Structural Engineers: Eastwood and Partners, Certifier: WARM, Client: Herefordshire Council.
ImageNickGrant
Da
tum
40
.00
50.9750.
97
d ashe d line ind icatesp ossibil e e xten sion tor epository
EPDM Single ply roof
Single ply roof
Ground Floor Signed Fire Exit
Clear footpath from building to muster point- minimum 1800mm from building& 1050mm wide
M M
M Fire assembly point
Fire engine access & turning zone
Fire management plan to include provisionfor egress through secure gates
Disaster recovery acces(all floors)
4500
0
45000
45000
45000
Drawn by
Scale
Dwg no.
Dwg Title
Client
Project
Revision
Checked by
Date@ A1
Check this drawing is the latest revision.Do not scale from this drawing.Do not use the information on this drawing without checking all dimensions onsite.Do not use any areas indicated for either valuation, puchase, sale or any otherform of legally binding contract.Do not reproduce any part of this drawing withour prior written consent.
Notes
4
1 : 200
Herefordshire Archive & Records Centre
Herefordshire Council
Site Fire Strategy Plan
GA020
02 Jul 12
MBTMc
6920
CONSTRUCTION
Revision Schedule
Rev Date Description Drawn Checked
1 28 Sep 12 Stage E issue NA MB
2 22 Apr 13 VE issue NA MB
3 09 Aug 13 Issued for Stage F RE MB
4 04 Mar 14 General amendments to bring in line with recommended VEproposal
LM MB
14 - 20 temp40-60 RH
18-25 temp
Manyconsiderations:SecurityFireLogisticsQuarantineDaylightPublic access,attractiveMultifunctionFutureexpansionetc etc etc ...
Photostore:12°C30%RH
IwilljustconsidertemperatureandRH!
Repository:13-20°C35-60%RH
ImageArchitype
Easilyisolatedzones
0 Ground Floor0
1 First Floor4590
1
2 Second Floor8330
2 3 4 5 6 7 8 9
3 Office roof8715
Parapet13445
Lower ExternalGround level
-170
Level 1110138
1DD235
Top of foundation-725
DPM Course
Airtightness course
4 Repository roof11870
1DD205
1DD204
1DD213
1DD050
1DD150
1DD051
1DD215
Drawn by
Scale
Dwg no.
Dwg Title
Client
Project
Revision
Checked by
Date@ A1
Check this drawing is the latest revision.Do not scale from this drawing.Do not use the information on this drawing without checking all dimensions onsite.Do not use any areas indicated for either valuation, puchase, sale or any otherform of legally binding contract.Do not reproduce any part of this drawing withour prior written consent.
Notes
1
1 : 50
Herefordshire Archive & Records Centre
Herefordshire Council
Airtightness Detail Section
DD021
01 Aug 2013
MBRE
6920
CONSTRUCTIONRevision Schedule
Rev Date Description Drawn Checked1 04 Mar 14 Construction Issue LM MB
14 - 20 temp40-60 RH
18-25 temprepositories service atrium offices
ImageArchitype
RecordsCentre,offices,conservationlabs,teachingetc
1130m2 1321m2
Keydesignstrategy:Officeisolatedfromrepository
20—22°Cthissideallyear
13-18°Cthissideisideal
ImageNickGrant
<0.04ach@100Pa withdoorssealed(Finaltest0.4achincludeddoorstooffice– airleakageroute)
Airtightdetailsdevelopedwithcontractor– theirfirstPassivhaus
ImageNickGrant
Costeffectiveconstruction– concreteblocksandplanks– noframeLarsentrussesandblowncellulose.
ArtsCouncilsuggest£3,500/m2
HARCwas£1,980/m2 (turnkey).
ImageNickGrant
ImageNickGrant
RecordsCentre- timberframe.Samedetailsasdevelopedfortheearlierschools.
(glassareaisforarchitecturenotPassivhaus)
ImageNickGrant
ImageNickGrant
Atriumexhibitionareabetweenrepositoriesandoffices
Repositoryenergybalance• Simplestform• LowIHGs0.6W/m2
• c.a.1airchange/day supplyairvent• NoHRV• Temp13-20°C• Nocooling (exceptphotostore)• InspiredbyTimPadfield &Danish
archives
www.conservationphysics.org
PHPP7
Moisturebalance - monthlymodelAnnualaveragehumidityisaboutright+/- dependingonEnglishweather.
Options:1. Closecontrolairconditioning2. Passivebuffering3. Controlventonphychrometrics4. Trimsupplyairhumidityin
summer(100m3/h,<10-15litresH2O/day
Buffering(roughly)
13
MaxventairH20imbalance:≈+/-10kg/day
EMC@40%RH≈6.5%EMC@60%RH≈8%=13%RH/%EMCchangec.a.150,000*kgofpaperetc.10kgH20x30days=0.2%changeinEMC=2.6%changeinRH
(*Halfofarchivist’sestimateandignoringbuildingfabricmoisturecapacity)
EMCofapapersamplefromrepositorymeasuredat6.9%@45%RH
Howlongtodry1,800tofconcrete??
September2014ImageNickGrant
AlanClarkeworkingtheantiquechemistrybalance
Homebrewtestkit
March2016
Theysaiditwouldn'twork:
Scepticalclientindesignmeeting:“TheTitanicwassaidtobeunsinkable”
AlanClarke’sreply:“Wearedesigningtheiceberg”
Compromise:anicebergwithaBMScontrolledheatingsystem...
TitanicVersusIceberg
ImageNickGrant
4sensors/store,alarms,duplexboilers,duplexpumpsetc...
Anairtightconcreteboxwrappedinoldnewspaper...
L
April May June
Troubleshooting1Unwantedhotwaterrunningthroughrepositorypipework.Lossesfrominsulatedpipewasenoughtoheatthebuilding!- Fix- valvesshutmanually
(Largefancoilstomeet1kWpeakheatload/floor!)
Troubleshooting2
Photostoredehumidifierinstalledbackwardssorunninginefficientlyandgeneratingunwantedheatintheservicecore.FixedinJune2015
Troubleshooting3
Faultysensorwiringmadetheheatingcomeonwhenalreadyaboveset-point.
Ayeartofixbutheatingisolatedsonotaproblemfornow.
Howfast/automaticdoesheatingresponseneedtobe?
JL
Valvestorepositoryshut,fansturnedoff
Smartbuilding Stupidbuilding
February2016(noheatingsinceJune)Didwereallyneedanemergencystandbyboiler??
Veryslightfluctuations inRHwithoutsideconditions.
March2016,ventreductionexperimentVentratereducedfrom250to100m3/hforwholerepository building anddehumidification switchedoffon4/3/16asanexperiment.RHcreptup+2%butevenmorestable.Inequilibriumwithwalls?Timewilltell!
Punch thankstoLloydAlter
VeryevenconditionsOriginalM&Econsultantsarguedforcirculatingfans,standardpracticetoavoid“coldspots“.
Wouldhaverequiredcoolingforthefangains.
Groundfloor 17.00°C 50%RHFirstfloor 17.86°C 46%RHTopfloor 17.87°C 49%RH
25
SupplyairDehumidification(ifneeded)
• VentilationisthemainsourceofH2O• Somakebuildingastightaspossible• Supplyc.a.1air-changeperday• Trimsupplyairwhenoutsideairhumidityis‘high’• Don’ttryandcontrolonroomRH.
WhatweimaginedDX coil for seasonal dehumidification – on/off control
Small fan 100 – 150m3/h1.2 air changes/day
(c.a. 30W)
Filter
Uninsulated duct
Uninsulated duct
WhatwegotNowweknowitworkswecanjustusethecoolingcoil.(butbecauseituseschilledwaterweneedtoprotectfromfrostsomehow)
Energy use – inc’ labs & offices
June2014– March2016- wholebuildingGas 11kWh/(m2.a) c.a.£1,000/aElectricity 34kWh/(m2.a) c.a.£11,000/aPE ≈100kWh/(m2.a)
Hopefullyelectricityusewilldecreaseasbuildingdriesoutandlightingandothercontrolsaresorted??
TFA:RecordsCentre 1321m2
Repository 1130m2
Total 2451m2
Lessons
Reducingventilation,heat,coolinganddehumidificationloadtoaverylowlevelallowsradicallysimplifiedcontrolstrategies– agentlenudge.
Supplyairdehumidification@about2airchanges/daysuccessfullystabilisedRHbeforethebuildingwasfullydry.
Simpleisreallyhardtogetbuilt!
PD5454range
OpenEnergyMonitor remoteaccessbyAlanClarke
Temperature°C
Outsideair
supplyairsettingschanged17/6/16>amonth later
Offe
redtochangesettings
PD5454range
OpenEnergyMonitor remoteaccessbyAlanClarke
Nexttime• NoBMS– savemoneyandimprovereliability• Simplerdehumidificationofairsupply• Nofrostcoil(uninsulatedducts,turnfanoffinextreme)• Applylessonslearnttothecooledphoto-store• Simplerheating– electricpanelheaters?
ImageNickGrant
Questions?