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Publications (14)
Interruptive electricity supply Due to new electricity generation and supply schemes, optimising cost and return in greenhouse production could be achieved with interruptive schemes for supplementary lighting (SL). We analysed the effect of interrupted SL (ISL) on both the cost of electricity and crop yield of tomato cultivation during a winter in...
The increased generation of electrical energy from renewable sources leads to variations in production accompanied by high price volatility. The use of surplus capacities for the artificial illumination of greenhouse crops would increase yield while enabling electricity to be purchased at low prices. This, however, requires the frequent turning on...
Die anstehenden Veränderungen im Energiesektor im Zuge der Abkehr von fossiler Energie hin zu den erneuerbaren Energien sind groß. Um auch zukünftig die Versorgungssicherheit zu gewährleisten, bilden Energiespeicher und energieeffiziente Maßnahmen zentrale Elemente dieser Veränderungen. Dies gilt sektorenübergreifend und für alle Wirtschaftszweige,...
Due to the fact that greenhouses need big amounts of energy (esp. for heating purposes in temperate zones), there is a growing interest on new technical systems to save energy and fossil resources. In this context, the inclusion of active solar thermal systems in greenhouses for energy harvesting and plant production represents an interesting solut...
Gegenwärtig liegt der Anteil der erneuerbaren Energieträger (z.B. Wind- und Sonnenenergie) bei der jährlichen Stromerzeugung in Deutschland bei etwa 35%. Bis zum Jahr 2030 will die Bundesregierung diesen Anteil auf 50% erhöhen. Andere EU-Staaten haben ähnlich Pläne. Prognosen zeigen, dass dies die Volatilität (Schwankung) der Stromerzeugung und -pr...
In Germany, the growing introduction of electricity generated from renewable energy creates variability on electricity tariffs. The present research is based on the idea of taking advantage of low electricity prices for supplemental illumination in greenhouse production. Due to the variation of electricity prices, also the application of the lighti...
Im ELGEVOS-Verbund (bestehend aus IGZ, HU und Fraunhofer IWES) sollen Konzepte für Gewächshäuser entwickelt werden, die sich auf eine zunehmende Nutzung von erneuerbaren Energien einstellen (Ziel der Bundesregierung: 50 % bis 2030) und der damit einhergehenden Volatilität des Stromangebots bzw. der Strompreise begegnen. Die Lösungsansätze sollen de...
In the present research the drying value chain is analyzed in terms of water and
energy consumption. Two case studies in two different environments are
compared: case A) in Berlin, Germany, and case B) in Queretaro, Mexico.
The drying process of tomatoes (Solanum lycopersicon L.) is of main interest
due to the benefits of the impact on transpor...
The water and carbon footprint of the presented dried tomato value chain is compared to the conventional process. The coupling of pre- and post-harvest processes, namely growing and drying respectively, is analyzed for resource consumption optimization. The growing system of tomatoes (Solanum lycopersicon L. cv, Pannovy) in an energy efficient gree...
In the drying value chain for fruits and vegetables, nine sub-processes have been identified. This work analyses the interaction between growing in greenhouses and drying sub processes for exergy and water flow reutilization. By thermodynamic model simulation, wet air from drying process is retrieved back to the crops within greenhouses. This inter...
