NightCool: Nocturnal Radiation Cooling Concept Long Term Performance Evaluation
Hermelink, Andreas; Moyer, Neil; Parker, Danny
Roofs; Florida; Buildings
An experimental evaluation has been conducted on a building-integrated night sky cooling system designed to substantially reduce space cooling needs in homes in North American climates. The system uses a sealed attic covered by a highly conductive metal roof (a roof integrated radiator) which is selectively linked by air flow to the main zone with the attic zone to provide cooling - largely during nighttime hours. Available house mass is used to store sensible cooling. The system's capability for solar dehumidification with minimal electricity input is demonstrated with long-term performance data taken over 2007 - 2009. A year-long study period , with identical white roofs, showed a cooling energy reduction of 12% in Central Florida with superior dehumidification. An opportunity experiment in the second year of monitoring also found that the simple measure of implementing reflective walls can produce a further measured 9% cooling energy reduction.
Florida; Buildings - Roofs
Florida Solar Energy Center and Sherwin, John, "NightCool: Nocturnal Radiation Cooling Concept Long Term Performance Evaluation" (2009). FSEC Energy Research Center®. 329.