- Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin Dr.-Ing. Martin Buchholz TU-Berlin, Building Technology and Design CEO Watergy GmbH, Berlin New Generation Greenhouse Systems - The Al Dhaid Prototype and Beyond
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Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr.-Ing. Martin Buchholz TU-Berlin, Building Technology and DesignCEO Watergy GmbH, Berlin
New Generation Greenhouse Systems -The Al Dhaid Prototype and Beyond
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Watergy, a closed greenhouse with internal gravity driven air circulation
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Big success…
+ High water recovery (85%), total water need 0,5 l/m²+ Increased yield by CO2 accumulation (1200 ppm CO2) + Enclosure keeps insects out (no pesticides´)
…with remaining constraints
- High costs for heat exchanger, tower construction- Abundancy to (cold) night time temperatures - Limitation according to high day time temperatures- Limitied performance of air de-humidification, results to low evaporation rates
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Exotherm Exotherm
Endotherm Endotherm
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Methods for improved temperature differences between hot/huimid air and available sources of cool
Heat pumps ??? Deep ocean water ???
Evaporative cooling Passive cooling, Storing cooler temperatures from night to day !!! Rejecting peak heat through night Evaporative cooling + air desiccation Cultivation of thermophile organisms, breeding
towards heat acceptance, algae CO2 enrichment Temperature difference between air layers
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Methods of heat transfer between hot/humid air and available sources of cool
Air to air heat exchangers, use of greenhouse cover Increase of Surface Increase of heat conductivity Air to liquid heat exchangers Direct contact air to water heat exchangers Direct contact air to liquid desiccant heat exchangers
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Methods of storing heat and cool between day and night
Water Soil Gravel, Sand + Water Substrate + Soil Liquid desiccants PCM Solar pond
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Transport of air and storage medium
Air Ventilation:Buoyancy drivenWind driven (open greenhouse)
PumpingCorrosion problem (moving parts of pumps)Fluodyne pumpsMoving absorbers
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Open Greenhouses
Fan and Pad with condenserFan and Pad with evaporator, external evaporator
and condenserFan and Pad with triple evaporator and condenserFan and Pad with 2 internal humidifiers and condenserFan and Pad with de-humidifier, humidifier and condenser
Slope greenhouseIntegration of different climatic zones
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Closed Greenhouses
Fan and cooling coilDecentralized coolerDay/night storage integrationAdditional humidifier integrationDesiccant greenhouseZoning of greenhouse
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Water Recycling Applications
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Water Recycling Applications
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Condensed Water
Brackish water Sea water
( > 90%)
Applications including desalination
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Condensed water
Sea water
( > 90%)
Applications including desalination
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Elimination of calcium minerals
Concentration of the brine
Na Cl
Mg Cl
Ka Cl
Applications including desalination
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
Dr. - Ing. Martin Buchholz, Technische Universität Berlin, Watergy GmbH Berlin
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