The Science of ComfortTM
In a previous blog post, we discussed variable air volume (VAV) diffusers and how these simple devices create small-zone comfort. VAV diffusers are available in two basic types: mechanical (thermal) and digital (electric). In this post, we take a closer look at the mechanical version, which requires no electrical or pneumatic connections and is powered by the temperature of the air.
Topics: GRD, Diffusers, Thermal Comfort, HVAC Fundamentals, HVAC, Engineering, Design Engineering
Obtaining efficient ventilation with overhead mixing systems for applications in heating climates can be a challenge. Not only does the positive buoyancy of the supply air work against the air distribution system, but most overhead mixing systems are designed with low supply air volumes (relative to cooling) and high supply air temperatures (more than 15°F above room temperature).
Topics: GRD, Diffusers, HVAC, Engineering, Design Engineering, ASHRAE 62, CFD
Integrated operating room ceiling systems consolidate multiple services in a single system to streamline supply, installation and on-site coordination. Price Industries’ Ultrasuite® system (pat. 10,401,049) combines hospital-grade LED lighting with precision-equalized laminar airflow diffusers to eliminate the traditional “light ring” and open valuable ceiling space for surgical equipment – all while mitigating contamination in the surgical zone.
Topics: Diffusers, HVAC, Engineering, Design Engineering, Critical Environments, Lighting, ASHRAE 170
The main goal of operating room air distribution design is to maintain a hygienic surgical zone around the patient and surgical team. Patient well-being is critical, and a well-designed air distribution system can help mitigate surgical site infections.
Topics: Diffusers, HVAC, Engineering, Design Engineering, Critical Environments, ASHRAE 170
Laminar flow is a type of fluid motion characterized by smooth parallel layers, or laminae, that can slide relative to each other with little to no mixing. This is in contrast to turbulent flows, where chaotic changes in pressure and velocity can be observed as vortices, or eddies (reverse swirling currents), and where much more mixing occurs within the fluid.
Topics: Diffusers, HVAC Fundamentals, HVAC, Engineering, Critical Environments
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