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What is Hot Water?
Hot water is water to which heat energy has been added . . .as more heat is added the water becomes
hotter. This water temperature guide shows typical water heating system design temperatures.
In practice, the system designer will establish the temperature or temperatures of hot water needed
for the various activities through consultation with the user or their representative. It is also necessary
for the system designer to know the coldest entering water temperature in order to determine temperature
rise.
The major objective of this presentation is to promote the design of energy-efficient commercial water
heating systems through proper sizing, equipment recommendations and system selection. Properly
designed commercial and industrial water heating systems are essential to the health and well being of
the community. Some activities would have to suspend operations or risk serious health and comfort
problems if they do not have the quantity of hot water at the temperature needed during the time it is
required.
QUANTITY
TEMPERATURE
TIME & SPACE
Therefore, the key to proper water
heating system design is to identify
the
quantity, temperature and time
characteristics of the hot water
requirement. Also,
space available
for equipment should be noted.
But first, a knowledge of water and
its characteristics is necessary in
order to effectively design a water
heating system.
SYSTEM CONCEPTS
* The average temperature of the hot and cold water mixture applied to the body.
The hot water being normally obtained from the commercial water heating system at 140°F.