Cost evaluation of diurnal thermal energy storage for cogeneration applications

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Energy Engineering; (United States)

OSTI ID:7003982

Somasundaram, S; Brown, D R; Drost, M K ^[1]

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1. Pacific Northwest Lab., Richland, WA (United States)

Cogeneration is playing an increasingly important role in providing energy efficient power generation and thermal energy for space heating and cooling, and industrial process heat applications. However, the range of applications for cogeneration could be further increased if the generation of electricity could be decoupled from the generation of process heat. Thermal energy storage (TES) can decouple power generation from the production of process heat, allowing the production of dispatchable power while fully utilizing the thermal energy available from the prime mover. The thermal energy from the prime mover exhaust can be stored either as sensible heat or as latent heat and used during peak demand periods to produce electric power or process steam/hot water. However, the additional materials and equipment necessary for a TES system will add to the capital costs. Therefore, the economic benefits of adding TES to a conventional cogeneration system would have to outweigh the increased costs of the combined system. This article discusses the relative performance and economic benefits of incorporating a diurnal TES system with a simple gas turbine cogeneration system. The relative benefit of combining a TES system with a cogeneration system was determined by comparing the levelized energy costs of the combined system (for supplying the same preselected steam load) with that of a conventional system and the base case (boiler) system.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 7003982
• Journal Information: Energy Engineering; (United States), Vol. 89:4; ISSN 0199-8595
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
20 FOSSIL-FUELED POWER PLANTS
COGENERATION
ENERGY EFFICIENCY
DUAL-PURPOSE POWER PLANTS
THERMAL ENERGY STORAGE EQUIPMENT
POWER GENERATION
WASTE HEAT UTILIZATION
SPACE HVAC SYSTEMS
COST ESTIMATION
EXHAUST SYSTEMS
HEAT RECOVERY
OFF-PEAK ENERGY STORAGE
PEAK LOAD
POWER DEMAND
PROCESS HEAT
DEMAND
DEUS
EFFICIENCY
ENERGY
ENERGY RECOVERY
ENERGY STORAGE
EQUIPMENT
HEAT
POWER PLANTS
STEAM GENERATION
STORAGE
WASTE PRODUCT UTILIZATION
250600* - Energy Storage- Thermal
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization
200107 - Fossil-Fueled Power Plants- Off-Peak Energy Storage- (1980-)
200105 - Fossil-Fueled Power Plants- Heat Utilization