Thermal analysis of directly buried conduit heat-distribution systems

Technical Report · Wed Aug 01 04:00:00 EDT 1990

OSTI ID:6391925

Fang, J B

The calculations of heat losses and temperature field for directly buried conduit heat distribution systems were performed using the finite element computer programs. The finite element analysis solved two-dimensional, steady-state heat transfer problems involving two insulated parallel pipes encased in the same conduit casing and in separate casings, and the surrounding earth. Descriptions of the theoretical basis, computational scheme, and the data input and outputs of the developed computer programs are presented. Numerical calculations were carried out for predicting the temperature distributions within the existing high temperature hot water distribution system and two insulated pipes covered in the same metallic conduit and the surrounding soil. The predicted results generally agree with the experimental data obtained at the test site.

• Research Organization: National Inst. of Standards and Technology (NEL), Gaithersburg, MD (USA). Building Environment Div.
• OSTI ID: 6391925
• Report Number(s): PB-90-269481/XAB; NISTIR--4365
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320603* -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Public Utilities-- (1980-)
COMPUTER CODES
DISTRICT HEATING
ENERGY LOSSES
ENERGY SYSTEMS
ENERGY TRANSFER
FINITE ELEMENT METHOD
HEAT DISTRIBUTION SYSTEMS
HEAT LOSSES
HEAT TRANSFER
HEATING
LOSSES
MATHEMATICAL MODELS
MILITARY FACILITIES
NUMERICAL SOLUTION
PIPES
TEMPERATURE GRADIENTS
THERMAL ANALYSIS
THERMAL INSULATION