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Experimental Study on Condensate Temperature in Cooling Coils

Posted by Dr. Jian Yu on Sep 28, 2023 10:14:00 AM

When moist air passes through a cooling coil, the potential exists for that moisture to condense on the coil's surface. The temperature at which that occurs is known as the condensing temperature or the dew point.

When condensation occurs, the temperature of the resulting condensate is known as the condensate temperature, often called wet-bulb temperature. While these terms are frequently used interchangeably, the results of a recent study conducted by SRC’s R&D team could indicate that the value for each is not always the same.

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Pitfalls to Avoid When Calculating Performance of Coils With Interlaced Circuiting

Posted by Dr. Jian Yu on Apr 26, 2022 8:45:00 AM

Interlaced circuiting of heat exchanger tubes is an effective way to make heat transfer equipment more versatile and adaptable to variable conditions. But, in my experience, industry knowledge of interlaced circuiting’s impact on coil performance at different load conditions is often overly conservative or incomplete. This article will cover the following topics:

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Topics: Engineering

The Impact of A-frame Coil Angle on Air Friction (Lab Test Results)

Posted by Dr. Jian Yu on Sep 14, 2021 4:37:20 PM

Super Radiator Coils has completed the first in a series of wind tunnel tests designed to understand how changes in an A-frame coil’s angle impact air friction. This post will explain that research, including:

  • Background
  • Testing methodology
  • Conclusion
  • What’s next?
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Effects of low ambient temperatures on propylene glycol properties and avoiding performance modeling pitfalls

Posted by Louis Rogerson on May 3, 2021 11:18:43 AM

This Doctor's Orders blog is a guest post from SRC Richmond's Director of Strategic Accounts, Louis Rogerson. 

Low-temperature heat transfer applications regularly use anti-freezing agents like propylene glycol (PG) to enable lower-temp operation. However, at very low ambient temps, properly calculating critical fluid properties like viscosity, fluid velocity, and their impacts on heat transfer becomes more complex. This post will analyze the correlation among those properties at low ambient temperatures and provide guidance for how to best model a coil’s performance at such conditions.

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SRC Launches Validated R-449A & R-448A Condenser Performance Model

Posted by Dr. Jian Yu on Feb 10, 2021 11:53:03 AM

We’re super excited to announce that we’ve validated the performance ratings for R-449A and R-448A condensers in Enterprise, our coil selection software. We believe the condenser coil performance model we’ve developed is the most comprehensive and accurate of its kind in the industry.

We wanted to use this post to briefly explain our testing methodology to our users. We’ll also touch on why performance modeling for these refrigerants has been challenging in the past, and how we plan to improve our model over time.

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Condensate’s Impact on Air Friction in Heat Exchangers Under Wet-Surface Conditions

Posted by Dr. Jian Yu on Jan 21, 2021 8:23:06 AM

This post summarizes the design and results from a set of tests recently conducted at Super Radiator Coils.

Plate fin-tube heat exchangers are widely used in many residential, commercial, and industrial systems, such as HVAC, food freezing/drying, data center cooling, heat recovery, dehumidification, etc.

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