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| Easy-to-read log sheet views highlight efficiency problems. |
Facts
- Centrifugal Water Chillers can account for 20% to 40%
of a facility's total energy consumption.
- A Centrifugal Water Chiller can lose as much as 30%
efficiency and still appear to be operating satisfactorily!
The Cost of Inefficiency
- 10,000-ton Chiller Plant
- Average cost to run chillers = $1,275,000
(Assumptions: .85kw/ton, $0.06/kwh, 2500 EFLH )
- Assuming 15% efficiency loss = $191,250
in WASTED ENERGY!
The
Problem
- Chiller logs are routinely taken, but analysis of the
data is difficult — so problems may not be identified
in a timely manner.
- In many plants the assumption is made that if the chiller
is running and the building is cool that everything is
OK!
The Solution
- A process for logging chillers and evaluating readings:
- Take readings using a PDA, Tablet PC or using AutoLog input readings directly from your Building Automation System.
- Load data to the ChillerCheck web site.
- Review efficiency analysis and take corrective action
if required.
- Process identifies the most common causes of inefficient
chiller operation, including:
- Fouled condenser and evaporator tubes
- Refrigerant leaks
- Air or non-condensables in the chiller
- Cooling tower problems
- Water flow problems
- Incorrect set points
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