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Jay Hudson, P.E., is president of J.G. Hudson & Associates, Salisbury, N.C., a specialty engineering firm concentrating in process-related engineering services. Jay has 35 years of experience in manufacturing processes, including chemical process, polymers, synthetic fibers, coatings and food products. He has particular experience in the specification, design and operation of thermal fluid systems. He can be reached at (704) 637-1714; e-mail jhudson@projeng.com; or visit www.projeng.com.
Author’s
Note: The information and illustrations contained in this article are included for illustrative
purposes and do not constitute a design or engineering work product. When
designing a thermal fluid system or specifying components for a thermal fluid
system, the reader should employ experienced resources, either internal or
external, to insure that recognized and generally accepted good engineering
practice is followed and that local and national codes and standards are
complied with. – JH
Pumps for higher temperature service require particular features for best performance. Applying these features to pumps used in lower temperature service will enhance their performance as well.
Carefully selecting the piping materials, piping design,
valves and insulation used in your thermal fluid heating system is important to
control leaks and extend fluid life.
Selecting
thermal fluid pumps of appropriate mechanical design, sizing the pumps to
deliver the proper flow to the heater and heat users, and making sure they are
properly installed are critical steps to specifying a thermal fluid system that
offers optimal performance and long-term reliability.
Electrically heated thermal fluid systems are extremely
useful, but the user should understand what’s “inside the box” when specifying
and purchasing this equipment.
What makes a good thermal fluid heater? The answer to that
question lies in understanding your process and its specifics, including the
required fluid flow rate, process fluid temperature setpoint, fluid allowable
film temperature, emission restrictions, and what add-ons are needed to enhance
combustion efficiency.
Whether choosing pumps for a new thermal fluid system or to replace pumps in an existing system, the design of the pump that is installed should be considered in order to realize the best value for the particular system being operated.
Pumps for higher temperature service require particular features for best performance. Applying these features to pumps used in lower temperature service will enhance their performance as well.
