Steady-state rates of heat transfer to a cold horizontal pipeline within an atmospheric pressure, air-filled, horizontal rectangular cavity with relatively hot isothermal walls, have been determined experikentally. The optimal geometrical arrangement, i.e. that for which the least rate of heat...

The geometrical configurations of those air-filled, horizontal eccentric annuli, that provide maximum thermal insulation corresponding to various imposed temperature conditions have been identified. For the concentric system, a simple correlation is presented which will permit the calculation of...

Flow patterns, temperature distributions and steady-state heat transfers inwards across a horizontal annular, atmospheric-pressure, air-filled eccentric cavity have been determined. Several different configurations of two low-conductivity baffles (arranged symmetrically with respect to the...