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Evaluation Of Energy Efficient Improvements To Portable Classrooms In Florida, Florida Solar Energy Center, Michael Callahan
Evaluation Of Energy Efficient Improvements To Portable Classrooms In Florida, Florida Solar Energy Center, Michael Callahan
FSEC Energy Research Center®
Florida has over 25,000 portable classrooms in use around the state. Energy costs for these structures exceed $20 million a year - or about 11% of all energy-related expenditures for educational facilities. Research has also shown interior ventilation rates in these classrooms typically fall far below the recommended levels in ASHRAE Standard 62-1989.
To explore ways in which costs might be reduced and the physical learning environment improved, we conducted a two year experiment in two highly instrumented portable classrooms at Silver Sands Middle School in Volusia County. A series of retrofits, aimed to cut energy use and improve ventilation …
Ventilation System Design Parameters For Greenhouses For Tobacco Production, R. S. Gates, George A. Duncan
Ventilation System Design Parameters For Greenhouses For Tobacco Production, R. S. Gates, George A. Duncan
Agricultural Engineering Extension Updates
Methods for germination and initial growth of tobacco have changed rapidly in recent years, moving from outside float beds into double-layer plastic greenhouses. Typically, these "tobacco greenhouses" consist of sidewall curtains, which run the entire length of both sides of the house. They may also have modest mechanical ventilation.
Ventilation of greenhouse structures is a mature field, with engineering practices for proper design given by numerous organizations including ASAE. In this article we briefly outline the important features of ventilation of concern to tobacco greenhouse operators.