Little River Flower Farm
For over 18 years Bruce and Nancy Stedman have worked their land year-round. They are certified organic, in-ground growers that sell via Whole Foods, CSAs and direct to Portland area restaurants.
Little River Flower Farm wanted to expand production while reducing significant energy bills associated with heating and lighting costs. Over the past three years, Bruce and Nancy lost several greenhouses to the considerable weight of snow that accumulates during Maine winters. They commissioned ArchSolar to build a structurally sound greenhouse that would reduce their energy inputs while raising crop outputs. They wanted a solution that was sustainable both environmentally and economically, and would allow them to switch to renewable energy as well as generate their own electricity.
• Glazing needs to maximize light infiltration, insulation and structural rigidity
• Structure needs to withstand 70lb/s.f. snow load and 105 mph winds
• Structure needs to generate electricity, use renewable heat resources and minimize conductive losses
• Fiberglass I-Beams: Many times less conductive than carbon steel, these outperform steel from a thermal standpoint. The I-Beams allow us to span 45 ft in a single span.
• Polycarbonate Building Skin: This feature allows for important light to come into the building and incorporates active solar thermal heating into the structure.
• Phase Change Materials: These thermal storage mediums are integrated throughout the building to absorb heat harvested from the south wall, and provide cooling in summer months.
• Integrated Climate Control Sensors: These monitor heat, relative humidity and carbon dioxide throughout the building.
• 21.4 KWp array of Flexible CIG Solar Panels produced by Miasolé.
|45’ wide “clear span”x 18’ high x 140’ long||14.4 KWp solar array built into greenhouse roof|
|6,400 sf of production area||R-2.4 glazing|
|25’ radius pultruded fiberglass arches||Biomass fueled root zone radiant heat system|
|Built to withstand 70 lb snow load, 105 mph wind||Phase change materials for heat storage|
|Miasolé flexible CIGS solar panels||30% Investement Tax Credit for PV array and solar thermal system|
|Different sections of solar covering 17%, 25%, 33% respectively||Recipient of 25% USDA REAP Grants for Biomass and PV|