If you take the equations from the ASHRAE Handbook of Fundamentals seen below and create a visual representation of those equations, it becomes a powerful tool for HVAC design. This results in a higher quality part and reduced cycle time, allowing manufactured parts to be produced faster. Desiccant dehumidifiers can eliminate this condensation. As the air or process is cooled below the ambient dew point, condensation can occur. Many industrial and manufacturing companies use chilled water to remove heat from various manufacturing processes. Therefore, using psychrometrics, it’s possible to determine the proper humidity ratio of the air so as to eliminate condensation.Ĥ. Hospital ORs are kept so cold that there is always risk of condensation from the ceiling since the temperature often goes below the dew point of ambient conditions (it’s called “raining in the OR”). These HVAC systems must be operational 24/7 and often require redundancy.ģ. This system is designed to control the environment for the preservation of highly valuable artifacts or works of art. HVAC systems designed for controlling the environment (temperature, humidity and pollutants) within a museum, a library, or any type of archival facility is much more complex than the system designed simply for maintaining human comfort. The following slide displays the comfort zone for humans:Ģ.
I will split this topic into 2 separate blog postings. This webinar could have easily gone on for two hours, but I was limited to one. Then, I demo’d the app by creating sample HVAC processes. This webinar included an overview of the science behind psychrometrics.
Ashrae psychrometric chart registration pdf#
I was amazed that almost 900 people registered for this webinar. I recently hosted an ASHRAE-sponsored webinar that discussed the basics of psychrometrics and also included a demo of the ASHRAE Psychrometric Chart iPad app (which we designed).
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