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CTI Bibliography of Technical Papers - HVAC Applications
Revised October 2005
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HVAC Applications
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Order Number
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Title
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Author
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Date
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Optimization of Water Cooled Chiller - Cooling Tower Combinations
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James W. Furlong and Frank T. Morrison, Baltimore Aircoil Company
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2005
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Abstract:
Water cooled chiller systems have typically been designed around
entering condenser water temperatures of 85°F with nominal
condenser water flow of 3 GPM/ton and a 10°F range. In recent
years there has been considerable debate on the merits of designing
around lower nominal condenser water flow rates with a higher range in
order to improve system lifecycle costs. However, two other parameters
must also be considered in any analysis - approach and design wet
bulb. The question to be answered is: What nominal condenser water
flow rate and approach is best from a first cost standpoint as well as
from full load energy standpoint at any given wet bulb? A study was
recently completed in an effort to answer this question using actual
first cost and full load performance data from a variety of chiller,
cooling tower, and pump manufacturers for nominal 500 ton water
cooled, centrifugal chiller system. This paper reports on the findings
from that study.
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