Practical Energy Efficiency Optimization
Presenting basic information for optimizing power plants, this book uses review exercises and practical case studies to provide real-world applications on maintaining optimal efficiency.
TABLE OF CONTENTS Practical Energy Efficiency Optimization
Application of EORT Models
From experience, it has been found that EORT models have unlimited applications in the process industry. Typical applications relate to
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Cooler/condenser performance prediction
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Cooling-water quality monitoring
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Evaluation of inhibitor performance
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Equipment deterioration study
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Specific energy consumption of a single process unit or the entire industry
Some of the examples given here refer to actual observations of some of the industries.
Using EORT Models in the Objective Function
Since EORT models combine all the independent variables in the form of an equation and the outcome is defined, they may be used as the objective function, and the limits of the independent variables will be the constraints.
Case Study 2-5: Energy Consumption Model Using EORT
This example refers to the power consumption of a centrifugal air compressor, based on observed operating data such as airflow rate, RPM, discharge pressure, and power consumption. Table 2-9 gives the details of the parameters as observed during the actual run of the air compressor. The objective is to minimize power consumption for certain airflow rates and required discharge pressure.
| Flow (nm 3/h) | RPM | Discharge pressure (ATA) | Power consumption (kWh) |
|---|---|---|---|
| 70,000 | 5,355 | 5.00 | 5,700 |
| 75,000 | 5,355 | 4.95 | 6,100 |
| 80,000 | 5,355 | 4.90 | 6,300 |
| 85,000 | 5,355 | 4.75 | 6,500 |
| 90,000 | 5,355 | 4.60 | 6,600 |
| 95,000 | 5,355 | 3.80 | 6,700 |
| 100,000 | 5,355 | 3.20 | 6,750 |
| 70,000 | 5,610 | 5.70 | 6,400 |
| 75,000 | 5,610 | 5.60 | 6,700 |
| 80,000 | 5,610 | 5.45 | 7,000 |
| 85,000 | 5,610 | 5.30 | 7,300 |
| 90,000 | 5,610 | 5.10 | 7,500 |
| 95,000 | 5,610 | 4.80 | 7,700 |
| 100,000 | 5,610 | 4.55 |
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