ED 2000 Anti-Fouling System for Chillers

Quick Index:

[ Top of Section| Top of Page | Return to Home ]

The Problem

Fig. 1 Annual Operating Cost vs. size of chiller for three different electric costs.

Energy requirements for the operation of a chiller account for a significant amount of total energy requirements. An effective water management program is essential in controlling energy usage. However, even the very best of water management programs do not totally eliminate scaling. Minimum levels of even soft scale accumulation on condenser tubes will greatly increase the annual energy expense. Today, there is an innovative solution available that will improve chiller performance by eliminating scale, translating into substantial energy savings.

Fig. 2 Additional Energy Cost required due to Fouling in Condenser Tubes

[ Top of Section| Top of Page | Return to Home ]

Wasted Energy due to Fouling

Energy consumption is dependent upon the efficiency of a chiller, hours of operation, average load, cost of electricity, and the amount of fouling. Figure 1 depicts the additional cost incurred due to fouling. For example, when the fouling factor is 0.003 (i.e. scale thickness of 0.036 in.), the additional energy cost per year for a 500 ton chiller is $25,300. Energy savings of equivalent amounts can be realized with effective water treatment.

Fig. 3 Additional Cost Incurred Due to Fouling in Terms of Chiller Size (tons). This data is based upon actual kilowatt per ton data as a function of the fouling factor, and was provided by York International Applied Systems.

[ Top of Section| Top of Page | Return to Home ]

Traditional Maintenance Techniques are not Enough

Condenser tubes last significantly longer if properly maintained. Once fouling occurs in condenser tubes, scales are removed by using acid, steel brushes and abrasive cutters, which shorten the life of the tubes. Premature replacement of these tubes is expensive. An investment in preventive maintenance such as the ED 2000 system can prevent this additional cost.

[ Top of Section| Top of Page | Return to Home ]