Preliminary Design Review Group Members Position Brittany Borella Solar Thermal Nicole Varble Hydronic System Eric Walkama Foundations Jay WheatonStructural/Building Thermal Ted ZachwiejaArchitectural/Building Thermal Group #16 Austin, Texas

Agenda Black band lives here! 1.Introduction 2.Architectural Floor plan a.House Elevation Drawings b.Floor Plan Drawings 3.Foundation Design a.Preliminary Analysis b.Block vs. Poured 4.Roof Truss Design a.Truss Shapes b.FPC positions c.Material Selection d.Preliminary analysis 5.Hydronic System a.Design Inputs b.Head Loss c.Pump Choices 6.Solar Thermal System a.Life cycle cost vs. Solar Fraction Analysis b.Flat Plate Collector Choices 7.Building Thermal System a.Wall, Roof, and Ceiling Thermal resistivity's b.Material Properties

Location: Austin, Texas  Climate  Temperate-to-hot green oasis  Highly variable – characteristics of dessert, tropics, and wetter climate  Winters  Mild and dry  Average 88 days below 45F (7C)  Average 24 days below freezing

Architectural Exterior Layout

Architectural

Architectural Basement

Architectural Floor 1

Architectural Floor 2

Fsoil Rf Rc h h/3 Figure: FBD of soil pressure on basement wall Figure: Bending Moment Diagram M(y) M max VariableValue ρ, density (dry).0637 lb/in^2 w, length wall44 ft h, height8-10 ft t, thickness6-10in I in^4 Fsoil lb Rc51666 – lb Rf lb M max – lb-in σ (dry) psi Foundation Foundation System

PouredBlock Pro Faster Installation Stronger Walls More Waterproof More flexible in design Properly filled walls can give good insulation Wire and rebar can be placed in between and in blocks to give tensile strength Can be installed by homeowner Con Cannot be done by homeowner Longer installation More prone to leaks Less flexible in design Approx. Installation Cost $5000 +$0(for self installation) or several thousand for labor Foundation Foundation Poured vs. Concrete Block Foundation

Weight of House Floor Reaction Figure: FBD of Compressive Loading on Foundation VariableValue w, width wall25 ft L, length wall44 ft t, wall thickness6-10 in A, wall area9792 – in^2 House Dead Weight>60 psf Dynamic Loading>100 psf Approx. Total Weight300 tonnes Foundation Foundation Compressive Loading

MaterialCompressive StrengthCost Portland Cement8400 psi$75/yd^3 Concrete Block8400 psi$1.60/block Rebar MaterialTensile Strength Grade 40>40,000 psi Grade 60>60,000 psi Grade 75>75,000 psi footing Figure: Sample Cross Section of Foundation wall (Cement only has a tensile strength of 132 psi so rebar is needed to resist soil load) Ceiling height, h grade 6 in rebar Rebar spacing is 12”-24” for horizontal and vertical (1/2” diameter) Foundation Foundation Materials

InsulationDrainage Interior WallDamp Proofing Exterior WallWaterproofing spray or layer Middle Wall (insulating concrete form) Piping System (trench drain, use slope) ASTM C 578 polystyrene foam Other support in basement to hold concentrated loadings in house and to take some loadings off of walls Soil compaction/preparation Foundation Foundation Other Foundation Considerations

Structural Truss Design

Structural FPC Position 18.4° 30°

Structural Dimensions

Structural Materials Owens Corning Pacific Wave Duration Premium AR Designer Series Shingle Owens Corning Sand Dune Duration Premium AR Designer Series Shingle

Structural Materials MaterialCostDensityVendorDescription 2"x4"x10'$3.64/ea lbf/52.5 cubic ft. Home Depot Kiln Dried Dimensional Lumber Shingles28.70/Bundle225lbf / 100 sq. ft.Lowes Owens Corning Duration Premium-Limited Lifetime Waranty Sheathing$14.47/32 sq. ft.68lbf / 32 sq. ft. Home Depot Trubord 19/32" OSB Sheathing Connector Plate $0.50/ea. 0.1 lb/plate Home Depot 5”x 1.8” TP-15R Tie Plate Underlayment$120/1000 sq. ft.28lbf/1000 sq. ft.LowesGrace TRI-FLEX underlayment

Structural Weight Analysis MaterialDensityAmount in RoofWeight (lbf) Lumber18.33 lbf/.365 cubic ft. 34*3.11 cubic ft Shingles225lbf / 100 sq. ft sq. ft Underlayment28lbf / 1000 sq. ft sq. ft.78.8 Sheathing68lbf / 32 sq. ft sq. ft FPC’s7 lbf / sq. ft.4*30 sq. ft Misc.0.3 lbf / sq. ft sq. ft Total-- 12,803.1 Total per FPC Side (1) lbf/ft^2 Total per non-FPC Side (2) lbf/ft^2

Structural Truss Stress Analysis Assumptions: 1.External Forces and Reactions act on the joints only 2.Members are in tension or compression 3.Joint “E” is on rollers 4.There are no moments at the joints because they are considered pins 5.Forces act in the plane, therefore 2-D 6.Weight is distributed evenly along roof

Structural Truss Stress Analysis L X R Ay R Ey x y d1d1 d2d2 A

Structural Truss Stress Analysis Plugging in values: R Ay = lbf R Ey = lbf

Hydronic System Design Inputs Structural [ft] Height of Basement9 Height of 1st floor9 Height of 2nd floor9 Width of Roof15 Roof Height8 FPC # of FPC3 Flow Rate [gpm]3.97 ∆P [in H2O]175.6 Cumulative Head [ft]

Hydronic System Head Loss Head Loss Factors Pipe Diameter Pipe Length Number of Elbows Elevation Changes Valves Flat Plate Collectors pump FPC HX Elevation Change Elbow Valve

Hydronic System Pump Choices Part ftCost ftingpm 8134k $ k $ *not self priming, rated for continuous use, temp range from 5-194F, use to transfer liquid to considerable heights Part ftCost ftingpm 4011k > $ k > $ *used typically in sprinkler systems, used to overcome high head loss, self-prime up to 25 ft

Hydronic System Pump Choices continued * multi stage impeller, typically used for coolant delivery, mounted vertically * to use in parallel with several of the same pump, compact, ideal for heating applications Part ftCost ftingpm 99825k $ Part 5 20 ftCost ftingpm 67705k $8.28/pari

Solar Thermal System As an Alternative to Natural GasAs an Alternative to Fuel Oil

Solar Thermal System As an Alternative to Electricity Maximization of Life Cycle Savings vs. the Solar Fraction occurs at around 4 panels in each chart

Solar Thermal System Leftover heat after the heat exchange with the domestic water can be used for radiant heat. Does not make sense to install a separate space heat system. Only below 60°F 3 months a year

Solar Thermal System Panel Options Sol 25 Plus by Stiebel Eltron

Solar Thermal System Panel Options Caleffi SKN 4.0 NAS10406 Flat Plate Solar Collector Other Standard Features : Fibreglass framework Low iron tempered glass. Copper header tube. Copper fintube absorber. R-10 poly-isocyanurate foam board. Rapid connection system. Flat and sloped roofs or freestanding. Vertical or horizontal installation. Compatible with any DHW heating system. Connect up to 12 collectors in series. Commercial or residential systems. 74.3% Optical efficiency Heat Loss coefficient.

Building Thermal Envelope Walls C ellulose Insulation: Pros mixed with chemicals to reduce its flammability (can create a 2 hour Firewall) Blown cellulose averages same R-Value as Fiberglass but can be 2-3 inches thinner mold easier around studs better against air infiltration Cons 72 hours to a year to dry completely installation requires special equipment mixed with chemicals  insulation can corrode metal

Building Thermal Envelop Walls Fiberglass Insulation: Pros ages well extremely difficult to ignite Doesn't require special equipment for installation Cons once ignited can release toxic fumes and burns very hot installation requires protective equipment

Building Thermal Envelop Walls MaterialR-Value between StudsR-Value at Studs Inside Film Coeffcient0.68 Gypsum Board0.08 Insulation Studs Plywood1.08 Vinyl Siding0.62 Outside film Coefficient CelluloseR19About $0.60 per ft^2 FiberglassR19About $0.48 per ft^2

Building Thermal Envelop Roof/Outside Component R-Value (hft 2 °F/Btu) Between TrussAt Truss Outside Film (15mph) Asphalt Shingles layers of Felt /32" OSB Sheathing0.77 2x4 Pine Stud Cellulose Insulation Fiberglass-Batt. insulation Inside Film (45° Slope, Heat Downward)0.76 Total R (cellulose) Total U (cellulose) Total R (fiberglass) Total U (fiberglass)

Building Thermal Envelop Ceiling/Attic Component R-Value (hft 2 °F/Btu) Between TrussAt Truss Interior Film (horizontal, still, heat upward)0.61 Gypsum Board (1/2”)0.04 2x6 Pine Stud Cellulose Insulation Fiberglass-Batt. Insulation Attic Film (horizontal, still, heat downward)0.92 Total R (cellulose) Total U (cellulose) Total R (fiberglass) Total U (fiberglass)

References 2009 ASHRAE Handbook - Fundamentals (I-P Edition) Ch International Building Code Lowes.com Homedepot.com