Condensation The Real Story. Dan Tempas Sr. Scientist
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1 The Real Story Dan Tempas Sr. Scientist
2 The Real Story 1982 Chemical Engineering Dan Tempas Sr. Scientist
3 The Real Story 1982 Nuclear Engineering Dan Tempas Sr. Scientist
4 Scope Why This Talk? Misconceptions Errors Incompleteness
5 Scope Not About Bulk Water
6 Scope Bulk Water is Important!
7 : The Real Story Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design
8 : The Real Story Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design
9 : Water Properties Structure
10 : Water Properties Structure 104.5
11 : Water Properties Structure + - +
12 : Water Properties Structure + - +
13 : Water Properties Structure
14 : Water Properties Structure
15 : Water Properties Structure
16 : Water Properties Structure
17 : Water Properties Phases of Water Gas
18 : Water Properties Phases of Water Liquid
19 : Water Properties Phases of Water Solid
20 : Water Properties Phases of Water Adsorbed
21 : Water Properties Effect of Temperature
22 : Water Properties Psychometric Chart
23 : Water Properties Psychometric Chart
24 : Water Properties Psychometric Chart
25 : The Real Story Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design
26 : Terms Absolute Humidity Measured in: Lbs Water/lb air Grains/cubic foot Psi Dewpoint Temperature
27 : Terms Relative Humidity Need 2 pieces of information: Temperature ( F) Percent (%)
28 : Terms Relative Humidity
29 : Terms Relative Humidity
30 : Terms Permeability: Diffusion Permeance Perms gr/hr ft 2 in Hg WV
31 : Terms Permeability: Diffusion Permeability Perm inch gr in/hr ft 2 inhg gr/hr ft inhg WV
32 : Terms Permeability: Diffusion ASTM E96 50% RH 0% RH Dry Cup
33 : Terms Permeability: Diffusion ASTM E96 50% RH 100% RH Wet Cup
34 : Terms Permeability: Diffusion ASTM E96 Dry Cup Wet Cup Unfortunately, results from ASTM E96 are not particularly dependable.
35 : Terms Permeability: Diffusion ASTM E96 Dry Cup Temperature? Wet Cup
36 : Terms Permeability: Diffusion Permeability = Breathability?
37 : Terms Permeability: Diffusion Permeability = Breathability?
38 : Terms Diffusion vs. Infiltration Check on precise conditions and amounts shown here.
39 : Terms Diffusion vs. Infiltration Still more than diffusion
40 : The Real Story Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design
41 : Wetting and Drying Two Sides of the same coin
42 : Wetting and Drying Two Sides of the same coin
43 : Wetting and Drying Two Sides of the same coin: Permeability WV WV
44 : Wetting and Drying Two Sides of the same coin: Permeability WV WV
45 : Wetting and Drying Two Sides of the same coin: Permeability WV WV Permeability is just a rate of movement
46 : Wetting and Drying Two Sides of the same coin: Permeability WV WV Remember, air movement is a lot more important
47 : Wetting and Drying Myth of Breathability The vapor retarder also seems to have served yeoman s duty in keeping the thoughts of the public and the construction industry off the subject of thermal wetting. William Rose, Moisture in Buildings
48 : Wetting and Drying Two Sides of the same coin:temperature
49 : Wetting and Drying Two Sides of the same coin:temperature Collin Murphy, 2002, Moisture Within Walls, Interface Brad Carpenter, 2010, Modern Performance Expectations and Historic Masonry Walls, RCI ABCB, 2009, The Handbook, Australian institute of Architects Nusser and Teibinger, 2012, Coupled Heat and Moisture Transfer - Implementing WUFI, COMSOL Conference DOE, 2011, Air Leakage Guide, DOE Joseph Lstiburek, 2006, Understanding Vapor Barriers, BSC Joseph Lstiburek, 2010, Mind the Gap, BSC/Insight Maria Spinu, 2012, Design Without Compromise, Construction Specifier Smegal and Straube, 2011, Hygrothermal Analysis of Exterior Rockwool Insulation, BSC Smegal, Lstiburek, Straube, Grin, 2012, Vancouver Field Exposure Facility: Phase III Exterior Insulation Analysis, BSC Straube, 2002, The Influence of Low Permeance Vapor Barriers on Roof and Wall Performance, Buildings VIII DOE, 2004, 5.C.2.1 Vapor Barrier Journal Paper, DOE
50 : Wetting and Drying Two Sides of the same coin: Temperature
51 : Wetting and Drying Two Sides of the same coin: Temperature
52 : Wetting and Drying Temperature
53 : Wetting and Drying Myth of Breathability
54 : The Real Story Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design
55 : Analyzing Assemblies Profile Method Teesdale, 1938 (Water in Buildings, Rose)
56 : Analyzing Assemblies Profile Method No infiltration Not dynamic Water movement RH or Temperature Dependencies Adsorption
57 : Analyzing Assemblies Profile Method
58 : Analyzing Assemblies Profile Method
59 : Analyzing Assemblies Profile Method
60 : Analyzing Assemblies Profile Method Compare Assemblies
61 : Analyzing Assemblies Profile Method The results from transient modeling do a much better job of replicating physical processes. They have entirely supplanted the profile method as a design tool. This comes at the expense, however, of tinkering.
62 : Analyzing Assemblies WUFI Method
63 : Analyzing Assemblies WUFI Method
64 : Analyzing Assemblies WUFI Method
65 : Analyzing Assemblies WUFI Method No infiltration Subtle data does not exist Temperature Dependencies Hard to learn Time consuming
66 : Analyzing Assemblies WUFI vs. Profile: Predictions
67 : Analyzing Assemblies WUFI vs. Profile: Predictions Old Wall Warm Cold Paint TYVEK
68 : Analyzing Assemblies WUFI vs. Profile: Predictions Medium Wall Warm Cold
69 : Analyzing Assemblies WUFI vs. Profile: Predictions Perfect Wall Warm Cold
70 : Analyzing Assemblies WUFI vs. Profile: Predictions
71 : Analyzing Assemblies WUFI vs. Profile: Predictions
72 : Analyzing Assemblies WUFI vs. Profile: Predictions
73 : Analyzing Assemblies WUFI vs. Profile: Predictions Perfect Wall > Medium Wall > Old Wall
74 : Analyzing Assemblies WUFI vs. Profile: Predictions
75 : Analyzing Assemblies WUFI vs. Profile: Predictions
76 : Analyzing Assemblies WUFI vs. Profile: Predictions Perfect Wall > Medium Wall > Old Wall
77 : Analyzing Assemblies WUFI vs. Profile: Predictions Perfect Wall > Medium Wall > Old Wall
78 : Analyzing Assemblies WUFI vs. Profile: Predictions Perfect Wall > Medium Wall > Old Wall
79 : The Real Story Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design
80 : Wall Design Cold Climates: Permeability What happens when we try to design a wall by altering the permeability of the materials?
81 : Wall Design Cold Climates: Permeability Cavity insulation forces interior vapor retarders.
82 : Wall Design Cold Climates: Permeability Very hard to deal with the various kinds of penetrations
83 : Wall Design Cold Climates: Permeability Poor effective drying because it is too often cold.
84 : Wall Design Cold Climates: Permeability Delicate system. What about changes by the owner? Maintenance?
85 : Wall Design Cold Climates: Temperature Easier to make right. Reduced cavity insulation Sheathing Insulation Broader applicability Effective Drying ROBUST!
86 : Wall Design Warm Climates: Permeability Easier VB design Easier installation Effective Drying
87 : Wall Design Warm Climates: Temperature No VB Easier installation Effective Drying
88 : Summary Properties of Water
89 : Summary Properties of Water Terms Relating to Relative Humidity Permeance Perms WV Wet Cup gr/hr ft 2 in Hg
90 : Summary Properties of Water Terms Relating to Wetting and Drying WV WV
91 : Summary Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies
92 : Summary Properties of Water Terms Relating to Wetting and Drying Analyzing Assemblies Wall Design Easier to make right. Reduced cavity insulation Sheathing Insulation Broader applicability Effective Drying ROBUST!
93 : References Rose, W.B., Water in Buildings. Wiley, Hoboken, NJ. CRC,1998. Handbook of Physics and Chemistry, Weast. Atkins, P., Physical Chemistry. Freeman Collin Murphy, 2002, Moisture Within Walls, Interface Brad Carpenter, 2010, Modern Performance Expectations and Historic Masonry Walls, RCI ABCB, 2009, The Handbook, Australian institute of Architects Nusser and Teibinger, 2012, Coupled Heat and Moisture Transfer - Implementing WUFI, COMSOL Conference DOE, 2011, Air Leakage Guide, DOE Joseph Lstiburek, 2006, Understanding Vapor Barriers, BSC Joseph Lstiburek, 2010, Mind the Gap, BSC/Insight Maria Spinu, 2012, Design Without Compromise, Construction Specifier Smegal and Straube, 2011, Hygrothermal Analysis of Exterior Rockwool Insulation, BSC Smegal, Lstiburek, Straube, Grin, 2012, Vancouver Field Exposure Facility: Phase III Exterior Insulation Analysis, BSC Straube, 2002, The Influence of Low Permeance Vapor Barriers on Roof and Wall Performance, Buildings VIII DOE, 2004, 5.C.2.1 Vapor Barrier Journal Paper, DOE
94 : The Real Story Dan Tempas Sr. Scientist Questions?
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