Link to document:
Status
Electronic Resource
Call number
Publication
DOE NASA 0096 1; Report; June 1980.
Language
Library's review
ABSTRACT:
The purpose of this study was to conduct a technical and economic assessment of the use of fluid bed heat exchangers (FBHX) for Thermal Energy Storage (TES) in applications having potential for waste heat recovery. A large number of industrial processes and solar power generation were
Numerous potential FBHX configurations were evaluated to identify the most effective types for TES systems and ranked according to operating parameters such as efficiency of heat recovery, heat transfer rate, system pressure drop, environmental problems, stability of bed operation, etc. In order to maximize the system's effectiveness while minimizing parasitic power requirements, multistage shallow bed FBHX's operating with high temperature differences were identified as the most suitable for TES applications.
The technical feasibility of FBHX for TES systems has been verified by analysis of the two selected conceptual systems. Each technical evaluation included establishing a plant process flow configuration, an operational scenario, a preliminary FBHX/TES design, and para- metric analysis. A computer model was developed to determine the effects of the number of stages, gas temperatures, gas flows, bed materials, charge and discharge times, and parasitic power required for operation.
The maximum national energy conservation potential of the cement piant application with TES is 15.4 x 106 barrels of oil or 3.9 x 106 tons of coal per year. for the electric arc furnace application the maximum national conservation potential with TES is 4.5 x 106 barrels of oil or 1.1 x 106 tons of coal per year.
Present time-of-day utility rates are near the breakeven point required for the TES system. Escalation of on-peak energy rates due to critical fuel shortages could make the FBHX/TES applications economically attractive in the future.
The purpose of this study was to conduct a technical and economic assessment of the use of fluid bed heat exchangers (FBHX) for Thermal Energy Storage (TES) in applications having potential for waste heat recovery. A large number of industrial processes and solar power generation were
Show More
considered to determine the applicability of a FBHX for TES. The potential applications were grouped on a unit operations basis so that if the system was applicable to one industry it may also be adaptable to other industries having similar unit operations. The rotary cement kiln and the electric arc furnace were chosen for evaluation using a variety of screening criteria.Numerous potential FBHX configurations were evaluated to identify the most effective types for TES systems and ranked according to operating parameters such as efficiency of heat recovery, heat transfer rate, system pressure drop, environmental problems, stability of bed operation, etc. In order to maximize the system's effectiveness while minimizing parasitic power requirements, multistage shallow bed FBHX's operating with high temperature differences were identified as the most suitable for TES applications.
The technical feasibility of FBHX for TES systems has been verified by analysis of the two selected conceptual systems. Each technical evaluation included establishing a plant process flow configuration, an operational scenario, a preliminary FBHX/TES design, and para- metric analysis. A computer model was developed to determine the effects of the number of stages, gas temperatures, gas flows, bed materials, charge and discharge times, and parasitic power required for operation.
The maximum national energy conservation potential of the cement piant application with TES is 15.4 x 106 barrels of oil or 3.9 x 106 tons of coal per year. for the electric arc furnace application the maximum national conservation potential with TES is 4.5 x 106 barrels of oil or 1.1 x 106 tons of coal per year.
Present time-of-day utility rates are near the breakeven point required for the TES system. Escalation of on-peak energy rates due to critical fuel shortages could make the FBHX/TES applications economically attractive in the future.
Show Less