More Webcasts of interest

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From HPAC Engineering:

Evolving IAQ standards, green-building rating systems,

customer needs, and vendor technologies are establishing new design

paradigms and software tools that the engineering community needs to be

aware of and absorb.

This Webcast will highlight recent developments in underfloor air-systems

design guidance and software tools, and methods for separating humidity

control and filtration from thermal air conditioning. The application of

computational fluid dynamics software also will be discussed.

New Design and Operating Guidelines and Tools for UFAD

Systems

Two key factors, (1) room air stratification, and (2) existence of an

underfloor air supply plenum, fundamentally change the way underfloor air

distribution (UFAD) systems perform under cooling operation in comparison

to conventional overhead mixing systems. By understanding how

stratification occurs in zones served by UFAD systems and how this

impacts heat gain to the underfloor plenum, particularly in multi-story

buildings, designers and operators can be better equipped to optimize

system performance to achieve improved energy efficiency, thermal

comfort, and ventilation effectiveness.

This portion of the Webcast will discuss new research and guidelines

being integrated into a new UFAD version of the whole-building energy

simulation program, EnergyPlus.

“Outside Air Systems Design and Computational Fluid Dynamics for

Modeling Ventilation Performance”

The traditional approach to HVAC is that the air handling unit takes in

outside air, combines it with recirculated air and heats the combined

airstream as required to heat the building. This has proven inaccurate

and energy wasteful. Increased IAQ demands have also mandated that the

OSA be treated more specifically for particulate content and humidity.

Simply stated, if OSA is the source of the particles, pollution and

heat/cold entering the building, by treating this air we treat a major

portion of the required environmental control. OSA issues include the

paradigm of a dedicated outside air path and separating the thermal

treatment of the building from the ventilation treatment of the building.

OSA issues include:

Heat recovery or tempering Dehumidification/humidification Filtration Volume Computational Fluid Dynamics software provides an improved level of

analysis that follows space thermal load calculation and modeling

software, such as EnergyPlus.

A live, interactive 15-minute Q & A session will follow the Webcast.

These webinars are free and will last approximately one hour.

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