DEHUMIDIFICATION CAPABILITIES OF COLD-COIL AIR-CONDITIONING SYSTEMS

摘要

Modern buildings use a wide variety of mechanical cooling systems with different control approaches to match cooling capacity with sensible load. Many of these cold-coil systems, however, do not successfully match dehumidification capacity to latent load. Unacceptably high levels of space relative humidity can result. If allowed to persist, high humidity levels can lead to microbial growth. Annual dehumidification performance depends upon the weather, building construction, and space use, as well as the configuration and control logic of the HVAC system. An HVAC-system modeling program was therefore used to study the hour-by-hour dehumidification performance of three common HVAC system configurations, which were applied to classrooms and offices in several different locations. The results show that commonly used HVAC systems may provide inadequate humidity control when applied in certain combinations of building type and climate.