This paper presents data from theoretical modeling and actual laboratory measurements of the UVC intensities at the surface of typical HVAC coils. To understand how effectively the UVC penetrated the coil’s interstitial spaces, measurements were taken at the coil’s surface, 1”, 2”, 3” and 4” depths respectively. UVC intensities were measured and recorded with a calibrated radiometer. The radiometer was capable of producing results that are traceable to NIST and through NIST to the International System of Units. Modelings demonstrating expected reduction of typical coil biofilms are presented using varying UVC intensities at the varying coil depths.

Air is the main carrier of heat, moisture, and other contaminants including the airborne pathogens in the hospital operating rooms. Airflow patterns within the operating rooms and especially in the sterile zone determine the levels of air speeds, temperature, and contaminant concentrations. The spread of pathogens from the sterile zone is directly related to the airflow patterns in the room. This paper with the help of computational fluid dynamics (CFD) analysis demonstrates the effect of return locations and strength of heat sources on the resulting airflow pattern, temperature distribution, and thermal comfort of the occupants within the operating room.

Health care facilities have traditionally used two air changes per hour (ACH) for most spaces. This number can be traced back to the architectural literature of the 1870s. It has been carried forward in codes and standards for nearly 140 years and currently is in ASHRAE Standard 170. This paper proposes an alternative rationale for outdoor air ventilation (fresh air ventilation) in health care spaces, based on the contemporary methodologies of ASHRAE Standard 62.1 and other international indoor air quality standards.

A premature baby is defined as the baby born in the 22th-37th week of the pregnancy. A baby, born before the 28th week of the pregnancy, can live inside of a newborn incubator with a thermoregulation system. Newborn’s death occurs by water and heat loss due to diseases. A decrement in body temperature causes hypothermia and an increment in body temperature causes hyperthermia that result by the death of the neonatal. For the survival of these babies, a suitable and controllable environment has to be provided. In this study, numerical and experimental analyses of a newborn incubator with a laminar flow unit are investigated.