Energy demand hourly simulations and energy saving strategies in greenhouses for the Mediterranean climate

34th UIT Heat Transfer Conference 2016

Priarone, A.^1 ; Fossa, M.^1 ; Paietta, E.^1 ; Rolando, D.^2

DIME - Dept. of Mechanical Energy, Management and Transportation Engineering, University of Genoa, Via Opera Pia 15a, Genova

116145, Italy^1

KTH Dept. Energy Technology, Brinnelvagen 68, Stockholm

S-100 44, Sweden^2

关键词: Crop evapotranspiration;    Energy-saving strategies;    Fao penman monteiths;    Ground-coupled heat pump;    Iterative calculation;    Latent heat exchanges;    Mediterranean climates;    Renewable technology;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/796/1/012027/pdf
DOI  :  10.1088/1742-6596/796/1/012027

来源: IOP

【 摘 要 】

This research has been devoted to the selection of the most favourable plant solutions for ventilation, heating and cooling, thermo-hygrometric control of a greenhouse, in the framework of the energy saving and the environmental protection. The identified plant solutions include shading of glazing surfaces, natural ventilation by means of controlled opening windows, forced convection of external air and forced convection of air treated by the HVAC system for both heating and cooling. The selected solution combines HVAC system to a Ground Coupled Heat Pump (GCHP), which is an innovative renewable technology applied to greenhouse buildings. The energy demand and thermal loads of the greenhouse to fulfil the requested internal design conditions have been evaluated through an hourly numerical simulation, using the Energy Plus (E-plus) software. The overall heat balance of the greenhouse also includes the latent heat exchange due to crop evapotranspiration, accounted through an original iterative calculation procedure that combines the E-plus dynamic simulations and the FAO Penman-Monteith method. The obtained hourly thermal loads have been used to size the borehole field for the geothermal heat pump by using a dedicated GCHP hourly simulation tool.