Page 350 - HVAC Pump Handbook

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Source: HVAC Pump Handbook

Chapter
12

Pumps for

Process Cooling

12.1 Introduction
Although, in a strict sense, process cooling is not part of the HVAC
industry, many designers of HVAC systems are also involved with this
cooling due to their experience with cooling towers and chillers. This
chapter reviews some of the basic cooling systems that are used in
industry.
Process cooling systems, like HVAC systems, can receive their cooling
from cooling towers or chillers. The actual temperature of the indus-
trial process determines whether cooling towers or chillers are used for
the cooling. A great many industrial processes require water no colder
than 85°F, so cooling towers can be used for these applications.
Process cooling can consist of cooling liquid or gas streams. Many
liquid cooling processes include heat exchangers with the process liq-
uid on one side and cooling water on the other side. Such heat
exchangers are used when the process liquid is dirty, toxic, difficult to
handle, or too valuable to pass directly through a cooling tower. Gas
streams include many special chemical processes that will not be
reviewed here. Some gas streams will be discussed that are nontoxic
and can be cooled by water injection or water-cooled heat exchangers.

12.2 Liquid Cooling

Liquid cooling in industrial processes can utilize cooling towers
directly, but owing to the conditions mentioned earlier, many of these

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