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Heat Balance in in Situ Combustion.

Authors
Chaiken-RF
Source
NTIS#: PB 266 736 :11 pages
Link
NIOSHTIC No.
10000662
Abstract
A quasi-steady-burning channel model is used in this Bureau of Mines study to describe the conductive heat loss from an in situ coal combustor to the surrounding rock strata. The calculated heat losses are significantly greater than those previously estimated, but are still very acceptable from the viewpoint of energy recovery. Approximately 80% to 90% of the heat of combustion of the coal should appear as sensible heat of the gaseous exhaust, with exhaust temperatures in the range of 1,000 deg to 1,200 deg c. The effects of burning stoichiometry and channel size on the heat loss are also discussed in terms of the model. Such effects are shown to be compatible with an in situ combustion process even in thin seams. However, these results depend on gas leakage and adverse roof falls not being important factors in determining the heat loss mechanism.
Publication Date
19770101
Document Type
IH; Report of Investigations
Fiscal Year
1977
NTIS Accession No.
PB-266736
NTIS Price
A03
Identifying No.
RI 8221
NIOSH Division
PRC;
Source Name
NTIS#: PB 266 736
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