Calculate the heat loss from pipes

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Chemical Engineering (New York); (United States)

OSTI ID:5636701

Konak, A R

Hot fluids cool as they move through pipelines. Calculating the extent of cooling can determine the energy needed to restore the heat to the fluid. In Part 1, heat losses were calculated in pipes where the internal-fluid temperature does not change appreciably from the inlet to the outlet. In these pipes, the heat loss is determined only by the velocity and properties of the fluid surrounding the pipe. When the internal-fluid temperature changes significantly, its properties must be included in the heat-loss calculations. This is because a film of internal fluid at the inner pipe wall resists heat transfer just as a film of external fluid resists heat transfer at the outer wall. The heat-transfer coefficients of these films are combined to give an overall heat-transfer coefficient. This value and the temperature difference between internal and external fluids are plugged into an energy-balance equation to determine the fluid temperature at any distance from the inlet.

• OSTI ID: 5636701
• Journal Information: Chemical Engineering (New York); (United States), Journal Name: Chemical Engineering (New York); (United States) Vol. 100:10; ISSN CHEEA3; ISSN 0009-2460
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
CALCULATION METHODS
EFFICIENCY
ENERGY EFFICIENCY
ENERGY LOSSES
ENERGY TRANSFER
FLUID FLOW
HEAT LOSSES
HEAT TRANSFER
LOSSES
PIPES