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Title: Copper slag thermal storage -- projections of performance and economics

Abstract

A solid residual regarded as waste from copper smelters, known as copper slag, offers an excellent medium for the storage of heat energy. Over one billion tons of slag is available at hundreds of smelters around the world. Copper slag is predominantly iron orthosilicate (2FeO.SiO/sub 2/), with sizable amounts of calcium, aluminum, magnesium and copper oxides. Formed in a highly oxidized environment at temperatures in excess of 1400/sup 0/C, copper slag is thermally, mechanically, chemically and physically stable when utilized as a thermal storage medium below 1000/sup 0/C. Conceptual designs for copper slag thermal storage systems have been proposed wherein a packed bed of copper slag is thermally cycled with air or some other gases utilized as transport media. Simply constructed with a metallic sheet liner and buried with an earthen berm, projected costs are literally one order of magnitude less than for molten salt, hot oils or other thermal storage techniques proposed for high-temperature systems. Applications for copper slag thermal storage include heat recovery systems for intermittent or uncontrolled heat sources, or peak-shaving power systems. A specific design for a solar combined cycle system is evaluated.

Authors:
Publication Date:
Research Org.:
Paul Curto Consulting, Potomac, MD
OSTI Identifier:
6589626
Report Number(s):
CONF-840201-
Journal ID: CODEN: ASMSA
Resource Type:
Conference
Journal Name:
Am. Soc. Mech. Eng., (Pap.); (United States)
Additional Journal Information:
Journal Volume: 84-AES-13; Conference: ASME energy sources technology conference and exhibition, New Orleans, LA, USA, 12 Feb 1984
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; SLAGS; HEAT STORAGE; THERMAL ENERGY STORAGE EQUIPMENT; DESIGN; CHEMICAL COMPOSITION; COPPER; ECONOMICS; HEAT RECOVERY; PERFORMANCE; PHASE STABILITY; SMELTERS; SOLAR THERMAL POWER PLANTS; THERMAL CONDUCTIVITY; VERY HIGH TEMPERATURE; ELEMENTS; ENERGY RECOVERY; ENERGY STORAGE; EQUIPMENT; METALS; PHYSICAL PROPERTIES; POWER PLANTS; RECOVERY; SOLAR POWER PLANTS; STABILITY; STORAGE; THERMAL POWER PLANTS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENTS; 250600* - Energy Storage- Thermal

Citation Formats

Curto, P A. Copper slag thermal storage -- projections of performance and economics. United States: N. p., 1984. Web.
Curto, P A. Copper slag thermal storage -- projections of performance and economics. United States.
Curto, P A. 1984. "Copper slag thermal storage -- projections of performance and economics". United States.
@article{osti_6589626,
title = {Copper slag thermal storage -- projections of performance and economics},
author = {Curto, P A},
abstractNote = {A solid residual regarded as waste from copper smelters, known as copper slag, offers an excellent medium for the storage of heat energy. Over one billion tons of slag is available at hundreds of smelters around the world. Copper slag is predominantly iron orthosilicate (2FeO.SiO/sub 2/), with sizable amounts of calcium, aluminum, magnesium and copper oxides. Formed in a highly oxidized environment at temperatures in excess of 1400/sup 0/C, copper slag is thermally, mechanically, chemically and physically stable when utilized as a thermal storage medium below 1000/sup 0/C. Conceptual designs for copper slag thermal storage systems have been proposed wherein a packed bed of copper slag is thermally cycled with air or some other gases utilized as transport media. Simply constructed with a metallic sheet liner and buried with an earthen berm, projected costs are literally one order of magnitude less than for molten salt, hot oils or other thermal storage techniques proposed for high-temperature systems. Applications for copper slag thermal storage include heat recovery systems for intermittent or uncontrolled heat sources, or peak-shaving power systems. A specific design for a solar combined cycle system is evaluated.},
doi = {},
url = {https://www.osti.gov/biblio/6589626}, journal = {Am. Soc. Mech. Eng., (Pap.); (United States)},
number = ,
volume = 84-AES-13,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 1984},
month = {Wed Feb 01 00:00:00 EST 1984}
}

Conference:
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