This Tech Tip discusses the increasing popularity of active chilled beams due to their energy efficiency and potential lowered floor-to-floor height, smaller ductwork, and reductions in riser and mechanical room footprints.
This article will provide some guidance as to changes in selection of Price products to meet the requirements of ASHRAE 90.1-2010.
ASHRAE Standard 90.1 Energy Standard for Buildings Except Low-Rise Residential Buildings is a document that is in a state of continuous maintenance. That means changes to the standard are ongoing and addendum are submitted for public review and approval on a frequent basis.
Increased focus on sustainability and the environmental impact of energy use has resulted in natural ventilation becoming an attractive option for many buildings.
Many times I have seen ceilings either removed from rooms or changed to a cloud type to add the perception of volume to the space. Many design engineers do not consider the impact on the room sound levels when a ceiling is removed, The impact of changing both liner and ceiling type, and the resultant change in the overall room sound levels.
The premise behind the consideration of cold air distribution is often the possibility of reduced mechanical system costs and reduced system energy. It is often applied in conjunction with ice storage systems to take advantage of the low temperature chilled water supplied by those systems.
As most designers and end users have concerns about the potential for condensation, it is common for the concept of using a condensate pan to be considered. To me, using a condensate pan appears to be an expensive option for active chilled beams, as the beams are often located in the ceiling and would require a condensate pump on each beam, or a sloped ceiling to allow the condensate to properly drain.
In a chilled beam, the term “induction” is used to describe the process of injecting primary air under pressure through a nozzle, which in turn entrains return or plenum air at the discharge of the nozzle.
When condensate forms it is too late to prevent the surface from becoming wet. The question, however, is how to prevent condensate from becoming a design flaw in the building.
My ideal mock-up includes the representative, design engineer, architect, and owner. This diversity makes for a lasting impression and is more likely to lead to the design being based upon Price rather than a competitor.
In duct design and installation, system effect is the generation of higher than expected pressure drops through changes in duct direction or geometry. It can also be caused by improper installation of fittings, which result in excessive, unanticipated turbulence in the airflow.
This article is intended to give you a preview of a current proposed change to ASHRAE Standard 90.1-2010 that pertains to equipment manufactured by Price Industries, Inc.
Some of the more common questions HVAC design engineers ask are related to the selection of mixing ceiling diffusers. There are many different types of diffusers and each one is selected for a variety of reasons.
This article discusses the differences between series and parallel FPU as well as the energy consumption characteristics of the ECM and PSC motor types.
Dual-density fiberglass insulation is the most widely used insulation for HVAC applications due to low cost, availability, excellent sound absorption characteristics, and strong resistance to air velocity erosion.
When a designer selects overhead air distribution as the basis for designing a building space, there are several design considerations.
HVAC designers have several goals to meet when sizing a terminal unit inlet. One is to minimize the sound generation of the terminal unit and the other is to accurately resolve the flow signal at both full cooling and minimum cooling.