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Annex 41 take-off meeting – 1Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
Annex 41 take-off meetingFEUP-LFC contribution
Annex 41 take-off meetingFEUP-LFC contribution
Vasco Peixoto de FreitasNuno M. M. Ramos
FACULTY OF ENGENEERING – PORTO UNIVERSITY
LABORATORY OF BUILDING PHYSICS
Vasco Peixoto de FreitasNuno M. M. Ramos
FACULTY OF ENGENEERING – PORTO UNIVERSITY
LABORATORY OF BUILDING PHYSICS
Annex 41 take-off meeting– 2Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
PRESENTATIONPRESENTATION
• Introduction to FEUP-LFC
• Testing Facilities
• Modelling
• Projects
• FEUP-LFC in MOIST-ENG
• Conclusions
• Introduction to FEUP-LFC
• Testing Facilities
• Modelling
• Projects
• FEUP-LFC in MOIST-ENG
• Conclusions
Annex 41 take-off meeting– 3Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
INTRODUCTION TO FEUP-LFCINTRODUCTION TO FEUP-LFC
HumanHuman resourcesresources�� PhD: PhD: 22�� PhD Students: 6PhD Students: 6�� MMSSc Students: 5c Students: 5
PATHOLOGYAND
REFURBISHMENT
PATHOLOGYPATHOLOGYANDAND
REFURBISHMENTREFURBISHMENTHYGROTHERMAL
BEHAVIOUR
HYGROTHERMALHYGROTHERMALBEHAVIOURBEHAVIOUR
ENERGYEFFICIENCY
ENERGYENERGYEFFICIENCYEFFICIENCY DURABILITYDURABILITYDURABILITYMATERIALSMATERIALSMATERIALS
FEUP-LFC BUILDING PHYSICS LABORATORY
Annex 41 take-off meeting– 4Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
TESTING FACILITIESTESTING FACILITIES1. Measurement of
hygrothermal propertiesλλλλThermal Conductivity
δδδδv
Vapour Permeability
DwMoisture Diffusivity
Ventilation
Infra-red Thermography
2. Weather station
3. Walk-in climatic chambers
Annex 41 take-off meeting– 5Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
MODELLINGMODELLING
Condensa 2000Vapour diffusionISO 13788
RH 2000Modelling relativehumidity inside dwellings
CONDUCHeat transfer 2Dthermal bridges
TRHUM 98 Modelling heat and moisture transfer in components (1D)
Annex 41 take-off meeting– 6Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
PROJECTS: Hygroscopic InertiaPROJECTS: Hygroscopic InertiaProblem Model and Measurements
Results
� Vapour production
� Ventilation
� Hygroscopicity
( )∑=
−×
−
−−
×=
−n
jmji
jj
ev
esate
iv
isati
iv
iii
i ATR
TPTR
TPVNGTR
VdtdT
PTdtdP
1462 106.3
.)(.)(.3600
.106.3.
φφγφφ
0
10
20
30
40
50
60
70
80
90
100
0 300 600 900 1200 1500 1800
Tempo (h)H
umid
ade
Rel
ativ
a (%
)
HRi Sim. 1 (sem superfícies higroscópicas)HRi Sim. 2 (argamassa - 2 cm)HRm argamassa - 2 cmHRi Sim. 3 (argamassa - 4 cm)HRm argamassa - 4 cm
Annex 41 take-off meeting– 7Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
PROJECTS: Rising Damp in Historic Buildings
PROJECTS: Rising Damp in Historic Buildings
Problem Experimental Device
Numerical Simulation Application
aprox. 0.80m0.50
43
21
LEGENDA:1 - ELEMENTOS METÁLICOS2 - PEÇA PREFABRICADA EM BETÃO3 - TELA DE PVC (1 mm)4 - PEDRA REACERTADA5 - AREIA6 - TUBO DE VENTILAÇÃO7 - GEOTÊXTIL
PORMENOR 1
PORMENOR 3PORMENOR 2
0.50
0.200.20
ESQUEMA AXONOMÉTRICO DO
DISPOSITIVO DE ADMISSÃO DE AR AO
SUBSISTEMA SUL
PORMENOR 1PORMENOR 3
Nave da Igreja
Capela Lateral
PORMENOR 2
54321
52 6 3 75 5 3 7 6
Annex 41 take-off meeting– 8Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
PROJECTS: Natural VentilationPROJECTS: Natural VentilationProblem Measurements
Equipment Results
RPH = 3,96
y = -3,9642x + 5,2635R2 = 0,952
1,0
1,5
2 ,0
2 ,5
3 ,0
3 ,5
4 ,0
4 ,5
5,0
5,5
0 ,0 0 ,2 0 ,4 0 ,6 0 ,8 1,0 1,2
Tempo (h)
Ln (C
)
PHOTOACOUSTIC PHOTOACOUSTIC MULTIMULTI--GAS GAS ANALYZERANALYZER
CAPSULES PFTCAPSULES PFT
0,30,320,340,360,38
0,40,420,440,460,48
0,50,520,54
12 13 14 15 16 17 18 19 20 21
Temperatura Interior (ºC)
RPH (1/h)
12 3
46
7 8 9
5N
0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
RPH local (1/h)
1 2 3 4 5 6 7 8 9
Compartimento
Annex 41 take-off meeting– 9Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
PROJECTS: Infrared Thermography
PROJECTS: Infrared Thermography
Problem
Results
Equipment
Annex 41 take-off meeting– 10Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
PROJECTS: Dimensional Stability of Wood
PROJECTS: Dimensional Stability of Wood
Problem Equipment
Measurements
Annex 41 take-off meeting– 11Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
FEUP-LFC in MOIST-ENGFEUP-LFC in MOIST-ENG
Subtask1: Modellingand common exercises
0
10
20
30
40
50
60
70
80
90
100
0 300 600 900 1200 1500 1800
Time (h)
Rela
tive
Hum
idity
(%)
RHi Sim. 1 (no hygroscopic surfaces)
RHi Sim. 2 (mortar - 2 cm)
RHmortar Sim. 2
1. Modelling relative humidity variation inside rooms, especially moisture buffering effect
2. Common exercises at room level
Annex 41 take-off meeting– 12Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
FEUP-LFC in MOIST-ENGFEUP-LFC in MOIST-ENG
Subtask2: Experimental investigations
1. Database of moisture storage properties of building and finishing materials
2. Comparison of computer model results with laboratory tests
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
30 40 50 60 70 80 90 100
HRi (%)
(g/(m
2.h.
HR)
)
adsorption
desorption
Annex 41 take-off meeting– 13Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
FEUP-LFC in MOIST-ENGFEUP-LFC in MOIST-ENG
Subtask3: Boundary Conditions
1. Definition of Portuguese outdoor moisture loads
2. Definition of Portuguese indoor temperatures and moisture production in dwellings
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
0 300 600 900 1200 1500 1800
Time (h)
Out
side
Tem
pera
ture
(ºC
)
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0 300 600 900 1200 1500 1800
Time (h)
Out
side
Rel
ativ
e H
umid
ity (%
)
Annex 41 take-off meeting– 14Vasco Peixoto de Freitas – Nuno M. M. Ramos
LFC
CONCLUSIONSCONCLUSIONS
• FEUP-LFC develops work on HAM motivated by the problems in Portuguese buildings
• FEUP-LFC has the support of the Portuguese member on the EXCO IEA ECBCS to participate in the MOIST-ENG project
• FEUP-LFC will contribute to MOIST-ENG with modelling work and laboratory experiments
• FEUP-LFC develops work on HAM motivated by the problems in Portuguese buildings
• FEUP-LFC has the support of the Portuguese member on the EXCO IEA ECBCS to participate in the MOIST-ENG project
• FEUP-LFC will contribute to MOIST-ENG with modelling work and laboratory experiments