Rooftop Greenhouse: (2) Analysis of Thermal Energy Loads of a Building-Integrated Rooftop Greenhouse (BiRTG) for Urban Agriculture

Urban Farm DB summary

This study analyzed the energy-saving efficiency of Building-integrated Rooftop Greenhouses (BiRTGs) for urban agriculture using building energy simulations (BES) combined with computational fluid dynamics (CFD). For growing tomatoes, the annual energy load in a BiRTG was 464,673 MJ, representing an average 5.2% reduction compared to a single-span greenhouse (490,128 MJ). Energy savings were observed from October to April due to heat transfer from the building, and implementing alternating air temperature management (ATM) from November to March further reduced heating energy loads, yielding average energy savings of 11.8%.