Retrotec USACE - Manual (Page 102)

80 ENERGY & PROCESS ASSESSMENT PROTOCOL
TABLE 4. CAUSES OF ENERGY WASTE AND INEFFICIENCY IN CENTRAL ENERGY PLANT
AND DISTRIBUTION SYSTEMS (Continued)
Problem description Waste/ineffi ciency Reference/appendix
Chiller
systems Water fl ow through shutdown equipment Waste D4.2.1
Dirty heat exchangers Ineffi ciency D4.2.2
Inoperable, uncalibrated, or poorly adjusted controls Ineffi ciency D4.2.3
Imbalanced water fl ow in system Ineffi ciency D4.2.4
Use of constant chilled water temperature Ineffi ciency D4.2.5
Use of constant cooling tower water temperature Ineffi ciency D4.2.6
Use of air-cooled chiller equipment Ineffi ciency D4.2.7
Use of oversized equipment Ineffi ciency D4.2.8
Excessive energy use at part load conditions Ineffi ciency D4.2.9
Water-cooled chillers ineffi ciency Ineffi ciency D4.2.10
Cooling plants are primary/secondary systems and are
equipped with constant speed primary chilled water pumps Ineffi ciency D4.2.11
Chiller system uses a constant speed condenser water
pumps Ineffi ciency D4.2.12
Ineffi cient chiller plant control strategies Ineffi ciency D4.2.13
Ineffi cient dehumidifi cation/reheat Ineffi ciency D4.2.14
No chiller waste heat reclaim Waste D4.2.15
Insuffi cient cooling load provided by existing chiller system ineffi ciency D4.2.16
Cooling tower dirty distribution nozzles Waste D4.2.17
Cooling tower leaks and excessive blowdown Ineffi ciency D4.2.18
Splash bars and drift eliminators in poor condition Ineffi ciency D4.2.20
Blowdown from supply header or cooling tower basin Ineffi ciency D4.2.21
Control of fans and pumps not based on cooling tower
water temperature Ineffi ciency D4.2.22
Cooling tower fan blades not adjusted for load or season Ineffi ciency D4.2.23
No duct at fan discharge for velocity recovery Ineffi ciency D4.2.24