Abstract
As well as heating in modern greenhouse, carbon dioxide (CO_2) enrichment of internal atmosphere by fossil fuel-fired CO_2 generator is commonly held for high yield and high quality products. This paper introduces the possibility of CO_2 emission reduction for protected horticulture by temporary CO_2-storage technology using the lithium silicate, which can be used repeatedly as a solid CO_2 sorbent by temperature swing operation. The trial model of the CO_2 enrichment system includes the manufacture of some parts such as the blower, dampers and pipes but not the CO_2 storage unit, in which there are some containers packed with pellet of lithium silicate sorbent and electric heater plates. CO_2 absorption and supply mode can be automatically selected on each approptiate time cycle using a 24-hour timer on the control panel. CO_2 emission is expected to be reduced by more than 30% with this system compared to the conventional system. This environment-friendly and high-yield production will be demonstrated in the greenhouse of the agricultural experiment station.
