CALS Greenhouse Design Team Team Green Thumb Fall 2012 Team Green Thumb Caitlin Keith Jiangong Li Brian Lockner Josh Miller (From L to R)

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Background Information The Client Sandpoint Urban Renewal Agency (SURA) Opportunities Create a year-round industry for locally grown produce including warm weather vegetables

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Problem Statement Propose and optimize a variety of cold weather greenhouse designs ranging from inexpensive to innovative that meet the growth requirements for a variety of crops. Perform an economic analysis of estimated expenditures and returns for SURA and provide a scaled model of the final design.

CALS Greenhouse Design Team Team Green Thumb Fall 2012 First Semester Flow Chart Project Learning Phase II Influence Greenhouse Tours SURA Influence Structural Design Internal Design Economic Analysis

CALS Greenhouse Design Team Vegetable Zones Vegetable groupings based on plant growth requirements. Factors Considered: Temperature ranges Humidity Fall 2012Team Green Thumb Project Learning Zone AVegetables Zone BVegetables Zone C Vegetables day FBroccoli day Fbeans day *Fcucumbers night FCabbage night Fzuccini/squash night *Fpeppers 45-60% shumidityCauliflower melons high humiditytomatoes chard strawberries leaf lettuce tarragon radish spinach garlic kale herbs and spices

CALS Greenhouse Design Team Air Distribution Air Circulation is vital to temperature and humidity control. Stagnant air can result in crop mildew and infectious disease Fall 2012Team Green Thumb Project Learning

CALS Greenhouse Design Team Material Pros and Cons Important Considerations: Cost Rigidity Useful Life Light Penetration Fall 2012Team Green Thumb Project Learning Greenhouse materials Pros and Cons ItemsAdvantagesDisadvantagesLight passAge limit PolycarbonateHigh Temperature Impact Resistance Low flammability Easily scratched High coefficient of thermal expansion Yellowing 79-87%5-12yrs Fiberglass Reinforced Polyester Low price High strength Easy installation Bad UV transmittance Low pressure resistance 60-88%7-15yrs Poly FilmsEasy install Low price High transparency Short useful lifespan Not rigid 90%4yrs

CALS Greenhouse Design Team Azimuth Angles Azimuth angles can be used to generalize the sun’s path through the sky as a function of latitude and time of year. Fall 2012Team Green Thumb Project Learning

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Design Alternatives Inexpensive Design Low Building Costs Frequent Maintenance Conventional Design High Yield Functionality Innovative High Yield Energy Efficient Largest Initial Investment

CALS Greenhouse Design Team Isometric View Fall 2012Team Green Thumb Inexpensive Design Materials Polyethylene covering Aluminum Frame Native Flooring Natural Gas Heating Specifications Footprint: 15,000 ft 2 Growing Space: 10,050 ft 2 Energy Usage: 929 MW-hr

CALS Greenhouse Design Team Isometric View Fall 2012Team Green Thumb Innovative Design Materials Polycarbonate shell Steel Frame Full Concrete Floor High-Efficiency Natural Gas Heating Specifications Footprint: 11,500 ft 2 Growing Space: 7,700 ft 2 Energy Usage: 591 MW-hr

CALS Greenhouse Design Team Isometric View Materials Polycarbonate shell Steel Frame Full Concrete Floor High-Efficiency Natural Gas Heating Specifications Footprint: 18,225 ft 2 Growing Space: 8,448 ft 2 Energy Usage: 535 MW-hr Fall 2012Team Green Thumb Conventional Design

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Computer Modeling Data Engineering Equation Solver (EES) Solved for heat loss in each design Accounting for: materials, building geometry, climate conditions Solved for heating needs due to airflow Accounting for: elevation, climate conditions, plant needs

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Preliminary Economic Analysis Inexpensive Design Present Worth = $510,416 Innovative Design Present Worth = $275,902 MARR = 6%

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Our Recommendations Grow Organic Bigger profit margins Increasingly large niche market Use Conventional Structure* Simple construction Relatively Low Initial Investment High Yield * Non-monetary factors not considered

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Future Possibilities Automated Roof Venting Solar Options Automated “Heat Shade” CFD CAD modeling Hydroponic Irrigation

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Future Work Spring 2013 Week /71/141/211/282/42/112/182/253/43/113/183/25 Optimize Best Design Detailed Economic Analysis Model Planning and Design Purchase Model Materials Written Report Model Construction Week /14/84/154/224/295/6 Report, cont'd Model cont'd Poster Design Expo Preparation Design Expo Final Exams

CALS Greenhouse Design Team Team Green Thumb Fall 2012 Questions?