The Science of ComfortTM
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
Topics: Displacement, Employees, HVAC, Engineering, Design Engineering, CFD
One of the most frequent questions that customer and reps ask us is “Can you model this?” Even though the answer is always a resounding yes – we love a challenge – every rep and customer is still
surprised at the broad array of applications that benefit from a Computational Fluid Dynamics (CFD) analysis. This means that a myriad of designs currently in use in different sectors of the building industry could have been improved.
Topics: Mock-Up, Heat Transfer, HVAC, Engineering, Design Engineering, Tech Tip, CFD
High demands are placed on modern HVAC systems to create optimal indoor environments while minimizing energy usage. Consequently, usage of computer-based analysis tools like computational fluid dynamics (CFD) that aid in the design of these systems is becoming more prevalent. With the recent addendum to ASHRAE 62.1 we expect the demand for CFD analyses to increase even further. The change states that a CFD analysis can be used to estimate the ventilation effectiveness value used to determine the outdoor air requirement instead of tables provided in the standard.
Topics: Mock-Up, Thermal Comfort, HVAC, Engineering, Design Engineering, Engineering Update, CFD
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