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Continuous Commissioning of a Central Chilled Water & Hot Water System
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Date
2000
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Energy Systems Laboratory (http://esl.tamu.edu)
Texas A&M University (http://www.tamu.edu)
Texas A&M University (http://www.tamu.edu)
Abstract
A central chilled water / hot water system
provides cooling / heating energy from central utility
plants to multiple customers (buildings) through
campus distribution loops. To effectively transport
the chilled water and hot water to the buildings and
control the flow, several types of bypass schemes are
used, including air handling unit coil bypass, pump
bypass, building loop bypass, distribution loop
bypass, and central utility plant decoupling. Most of
the bypass schemes are designed to provide comfort
to each building without regard for the loop pumping
requirements. Continuous Commissioning of the
building and campus loops is necessary to ensure
adequate water flow to each building and reduce the
overall pumping energy required for both the campus
loops and the building loops. Some optimization of
the plant chiller 1 boiler operation is also necessary
and beneficial. In general, through Continuous
Commissioning, chilled water and hot water loop
temperature differences will be improved, leading to
reduced chilled water and hot water flow rates. This
will save pumping energy and improve chiller/boiler
efficiancy.