Plate heat exchangers in Alaska save $4 million per year
Twenty-four banks of inflated-type plate heat exchangers play a key role in the energy conservation program at the electrical generating facility in the city of Anchorage, Alaska. The exchangers recover 138 million Btu of heat/hr. First substantial savings is provided by the use of hot exhaust gas, 1000/sup 0/F, from natural gas-fired turbines to furnish steam for the turbines. This results in generation of 33% more electricity without additional fuel. At this point the second energy conservation factor in which the plate-type heat exchangers are used comes into play. Water at 108/sup 0/F from the steam turbine flows on the outside of the plate exchangers at a rate of 23,000 gpm. This 108/sup 0/F water warms 7200 gpm of municipal water flowing through interior of exchangers which prevents freezing. Anchorage officials estimate that annual savings could exceed $4 million per year by eliminating the cost of pipe thawing and freeze prevention, along with decreased water consumption.
- OSTI ID:
- 5884518
- Journal Information:
- Chem. Process. (Chicago); (United States), Vol. 42:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HEAT RECOVERY EQUIPMENT
OPERATION
THERMAL POWER PLANTS
GAS TURBINES
WASTE HEAT UTILIZATION
ECONOMICS
ALASKA
HEATING
WASTE HEAT
WATER
ENERGY
ENERGY SOURCES
EQUIPMENT
HEAT
HYDROGEN COMPOUNDS
NORTH AMERICA
OXYGEN COMPOUNDS
PACIFIC NORTHWEST REGION
POWER PLANTS
TURBINES
TURBOMACHINERY
USA
WASTE PRODUCT UTILIZATION
WASTES
200105* - Fossil-Fueled Power Plants- Heat Utilization