Abstract
Applications of thermal energy storage (TES) in a paper and pulp mill powerhouse were studied as one appraoch to the tranfer of steam production from fossil fuel boilers to waste fuel (hog fuel) boilers. Data from specific mills were analyzed an various TES conceps evaluated for application in the process steam supply system. Constant pressure and variable pressure steam accumulators were found to be the most attractive storage concepts for this application. Performance analyses based on the operation of a math model of the process steam supply system indicate potential substitution of waste wood fuel for 100,000 bbl oil per year per installation with the accumulator TES systems. Based on an industry survey of potential TES application, which requires excess base steaming capability, the results from the individual installation were extrapolated to a near-term (1980's) fossil fuel savings in the paper and pulp industry of 3.2x10/sup 6/ bbl oil per year. Conceptual designs of mechnanical equipment and control systems indicate installed cost estimates of about $560,000 per installation, indicating an after-tax return on investment of over 30%.
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