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Analysis of a small steam district heating system at Ft. McClellan, Alabama

Author
Pine, G. D.
Published
United States : [publisher not identified], 1984
Springfield, Va.: National Technical Information Service, [approximately 1984]
Physical Description
microfiche : negative ; 11 x 15 cm

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Summary
An analysis to identify major causes for heat loss from one steam district heating system at Ft. McClellan, Alabama, has been made. Because only limited information based on measurements was available, we took measurements of condensate ejected from traps and of ground temperature profiles above buried steam pipes and combined these limited data with analyses of the building heat loads, heat loss from the buried pipelines, and the steam flow through the pipes to develop estimates of the energy efficiency of the distribution system. Based on these estimates, we concluded that the system efficiency (steam delivered to the buildings/steam entering the distribution system) is approximately 53%. Major identified sources of heat loss include conduction losses enhanced by the deterioration of the pipe insulation and flooding of valve pits and pipe conduits by the buildup of groundwater and condensate after failures of sump pumps. Leaks of prime steam do not appear to be a significant source of loss. Measures recommended to reduce the heat losses include providing better maintenance for sump pumps in vaults and reducing the operating pressure of the steam system. The latter measure is the more effective of the two. We estimate that reducing the operating pressure from its present 100 to 50 psig would reduce heat losses by 15% and would save the Army an estimated 43,000/year.
Report Numbers
DE84014421; ORNL/CON-152
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC05-84OR21400
OSTI Identifier 7027280
Research organization: Oak Ridge National Lab., TN (USA).
View MARC record | catkey: 47343474