Cost-benefit analysis of variable-speed generators applied to peakshaving/cogeneration systems. Topical report, December 1988-May 1989
Technical Report
·
OSTI ID:7153894
Variable-speed operation of engine-generator sets can achieve maximum fuel efficiency at any rpm, taking advantage of the engine's ability to operate at speeds above (and below) the normal, fixed speed. Thus, it is possible to produce more power for a given engine size, reduce operating costs, and, in many cases, reduce capital costs for a given power rating. Two approaches to variable-speed generation are considered: one approach using a doubly-fed machine plus a power converter and another approach using a conventional generator plus a power converter. In the capital cost and operating cost comparisons the approach using a doubly-fed machine proves superior. The following figures apply to that approach. Constant operation at any level below full load results in operating cost savings with variable-speed generation. For 150 kW systems studied, variable-speed peakshaving can save from $4,000 to $8,000 in operating costs per year, and variable-speed cogeneration can save up to $24,000 in operating costs per year, assuming typical gas and electrical charges. Capital costs for the same systems can be reduced by as much as $5,000 for peakshaving and $8,000 for cogeneration.
- Research Organization:
- Electronic Power Conditioning, Inc., Corvallis, OR (USA)
- OSTI ID:
- 7153894
- Report Number(s):
- PB-90-131533/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
29 ENERGY PLANNING, POLICY, AND ECONOMY
290800 -- Energy Planning & Policy-- Heat Utilization-- (1980-)
296000 -- Energy Planning & Policy-- Electric Power
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320603* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Public Utilities-- (1980-)
COGENERATION
COST BENEFIT ANALYSIS
DEUS
DOCUMENT TYPES
ECONOMIC ANALYSIS
ECONOMICS
ELECTRIC GENERATORS
ENERGY CONSUMPTION
ENERGY SOURCES
ENERGY SYSTEMS
FLUIDS
FOSSIL FUELS
FUEL CONSUMPTION
FUEL GAS
FUELS
GAS FUELS
GASES
LOAD MANAGEMENT
MANAGEMENT
NATURAL GAS
PEAK LOAD
POWER DEMAND
POWER GENERATION
PROGRESS REPORT
STEAM GENERATION
290800 -- Energy Planning & Policy-- Heat Utilization-- (1980-)
296000 -- Energy Planning & Policy-- Electric Power
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320603* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Public Utilities-- (1980-)
COGENERATION
COST BENEFIT ANALYSIS
DEUS
DOCUMENT TYPES
ECONOMIC ANALYSIS
ECONOMICS
ELECTRIC GENERATORS
ENERGY CONSUMPTION
ENERGY SOURCES
ENERGY SYSTEMS
FLUIDS
FOSSIL FUELS
FUEL CONSUMPTION
FUEL GAS
FUELS
GAS FUELS
GASES
LOAD MANAGEMENT
MANAGEMENT
NATURAL GAS
PEAK LOAD
POWER DEMAND
POWER GENERATION
PROGRESS REPORT
STEAM GENERATION