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The Living Rainforest Sustainable Greenhouses Gerard Bot 1, Karl Hansen 2, Andrew Logan 2, Henk Witte 3 and Feije de Zwart 1 1 Wageningen UR Greenhouse Horticulture 2 The Living Rainforest, Hampstead Norris, UK 3 Groenholland, Amsterdam, The Netherlands Slide 2 Introduction Sustainable greenhouses Seasonal energy storage To be realised Link to production greenhouses Slide 3 The Living Rainforest? Introduction Charity, demonstrates the ecology of the living rainforest to the general public renovation of existing buildings: show case for sustainability demonstrate the link between ecology and sustainability Slide 4 Sustainable greenhouses Greenhouse properties for low heat demand: cover insulation energy friendly climate control: climate settings and strategy efficient conversion of primary energy to heat the engine of the greenhouse Slide 5 cover k-value (W/m 2 K) single glass5.7 Double or 1+screen3.0 triple or 2+screen2.3 HR++*1.6 Vacuum glas*1.0 0 20 40 60 80 100 0123456 k (W/m2K) Rel. Econs (%) boiler Cover insulation and heat demand Slide 6 cover k-value (W/m 2 K) single glass5.7 Double or 1+screen3.0 triple or 2+screen2.3 HR++*1.6 Vacuum glas*1.0 0 20 40 60 80 100 0123456 k (W/m2K) Rel. Econs (%) boiler Cover insulation and heat demand Slide 7 heat-demand energy in: boiler heat demand energy in: work Heat Pump seasonal storage Slide 8 Cover insulation and heat demand Slide 9 Seasonal storage Aquifer: 2 wells at different temperature Slide 10 filling warm aquifer emptying cold aquifer (greenhouse is cooled) 17 o C 7 o C heat exchanger Summer period: excess heat Slide 11 Winter period 17 o C 7 o C heat pump heat exchanger emptying warm aquifer: greenhouse is heated filling cold aquifer Slide 12 Seasonal storage Aquifer: 2 wells at different temperature energy storage: specific geological conditions Ground Source Heat Exchanger: passive storage via boreholes not available at TLR Slide 13 Slide 14 Heat Pump: Slide 15 Average GSHE fluid temperatures year 1 till 5 for different strategies emphasis on heating balanced emphasis on cooling Slide 16 Average GSHE fluid temperature for year 1 to 25 (final stage) with emphasis on cooling the building Design: number of boreholes and depth from local geology and dynamic interaction of GSHE and greenhouse for 25 y Slide 17 To be realised: Climate control: high RH desired Energy conversion: - GSHE + Heat Pump - wood fired boiler for back-up Cover: TLR light is not a bottle neck: k= 1.5 2 Wm -2 K -1 Energy system of greenhouses, offices and visitors centre integrated Slide 18 TLR show case general public: - principles applicable at home - link ecology and sustaibnability production greenhouses: demonstrates sustainable operation visualises application bottlenecks Slide 19 Thank you for your attention