Fan sound is a very important consideration in the selection and application of fans. In spite of this, fan sound continues to be one of the most misunderstood topics in the air handling industry. In an effort to provide a better understanding and point of reference on how fan sound is developed, rated, applied and controlled; this is the second article in a series of four articles covering this topic.
After an earthquake or seismic event, buildings containing essential services must be able to remain operational. Seismic certification of HVAC equipment provides assurance that the equipment will not only survive the earthquake, it will remain online and functional. Seismically certified HVAC equipment allows consulting and specifying engineers to meet the strictest seismic building codes, quickly and easily, without the delays of additional certification testing. Seismically certified HVAC equipment allows building owners to protect their investment.
[Content Provided by AAON]
A research project “Evaluation of Variable Refrigerant Flow (VRF) Systems Performance and the Enhanced Control Algorithm on Oak Ridge National Laboratory’s (ORNL’s) Flexible Research Platform” was performed to (1) install and validate the performance of Samsung VRF systems compared with the baseline rooftop unit (RTU) variable-air-volume (VAV) system and (2) evaluate the enhanced control algorithm for the VRF system on the two-story flexible research platform (FRP) in Oak Ridge, Tennessee. This final report includes discussion of the design and installation of the VRF system, the data monitoring and analysis plan, the cooling season and heating season data analysis, and the building energy modeling study.
[Content Provided by Samsung]
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ASHRAE advances the arts and sciences of heating, ventilation, air conditioning and refrigeration to serve humanity and promote a sustainable world. With more than 53,000 members from over 132 nations, ASHRAE is a diverse organization representing building system design and industrial processes professionals around the world.