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A pipe having an outside diameter of 6 cm is maintained at 200°C by steam flowing inside. The pipe passes through a large factory area and loses heat from the outside with W h 6.5 Using the table below, select two alternative insulating materials that m2-K could be installed to lower the outside surface temperature of the insulation to 30°C, when the pipe is exposed to room air at 20°C. Find also the temperature in between the two insulation

A pipe having an outside diameter of 6 cm is maintained at 200°C by steam flowing inside. The pipe passes through a large factory area and loses heat from the outside with W h 6.5 Using the table below, select two alternative insulating materials that m2-K could be installed to lower the outside surface temperature of the insulation to 30°C, when the pipe is exposed to room air at 20°C. Find also the temperature in between the two insulation

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A pipe having an outside diameter of 6 cm is maintained at 200°C by steam flowing inside. The pipe passes through a large factory area and loses heat from the outside with W h 6.5 Using the table below, select two alternative insulating materials that m2-K could be installed to lower the outside surface temperature of the insulation to 30°C, when the pipe is exposed to room air at 20°C. Find also the temperature in between the two insulation.

Thermal Temperature conductivity, Density, range, °C mW/m -°C kg/m³ Туре I Linde evacuated superinsulation 2 Urethane foam 3 Urethane foam 4 Cellular glass blocks 5 Fiberglass blanket for wrapping 6 Fiberglass blankets 7 Fiberglass preformed shapes 8 Elastomeric sheets 9 Fiberglass mats 10 Elastomerie preformed shapes 11 Fiberglass with vapor barrier blanket Application -240–1100 0.0015-0.72 Variable Many -180-150 16-20 25 48 Hot and cold pipes 16-20 29-108 22-78 -170-110 32 Tanks 110-150 Tanks and pipes Pipe and pipe fittings Tanks and equipment Piping Tanks -200-200 -80-290 10-50 25-86 32-55 -170-230 10-50 -50-230 10-50 -40-100 36-39 70-100 60-370 30-55 36-39 10-50 Pipe and pipe fittings Pipe and fittings Refrigeration lines -40-100 70-100 -5-70 29-45 10-32 12 Fiberglass without vapor barrier jacket 13 Fiberglass boards to 250 29-45 24 48 Hot piping 20-450 33-52 25-100 Boilers, tanks, 14 Cellular glass blocks and boards 15 Urethane foam blocks and 20-500 100-150 110-150 25-65 heat exchangers Hot piping Piping 29-108 16-20 boards Hot piping Hot piping Hot piping 100-160 Hot piping, boilers, chimney linings Boilers and tanks 16 Mineral fiber preformed shapes 17 Mineral fiber blankets to 650 35-91 125-160 to 750 37-81 125 18 Mineral wool blocks 450-1000 52-130 175-290 19 Calcium silicate blocks, boards 230-1000 32-85 20 Mineral fiber blocks to 1100 52-130 210
Transcribed Image Text:Thermal Temperature conductivity, Density, range, °C mW/m -°C kg/m³ Туре I Linde evacuated superinsulation 2 Urethane foam 3 Urethane foam 4 Cellular glass blocks 5 Fiberglass blanket for wrapping 6 Fiberglass blankets 7 Fiberglass preformed shapes 8 Elastomeric sheets 9 Fiberglass mats 10 Elastomerie preformed shapes 11 Fiberglass with vapor barrier blanket Application -240–1100 0.0015-0.72 Variable Many -180-150 16-20 25 48 Hot and cold pipes 16-20 29-108 22-78 -170-110 32 Tanks 110-150 Tanks and pipes Pipe and pipe fittings Tanks and equipment Piping Tanks -200-200 -80-290 10-50 25-86 32-55 -170-230 10-50 -50-230 10-50 -40-100 36-39 70-100 60-370 30-55 36-39 10-50 Pipe and pipe fittings Pipe and fittings Refrigeration lines -40-100 70-100 -5-70 29-45 10-32 12 Fiberglass without vapor barrier jacket 13 Fiberglass boards to 250 29-45 24 48 Hot piping 20-450 33-52 25-100 Boilers, tanks, 14 Cellular glass blocks and boards 15 Urethane foam blocks and 20-500 100-150 110-150 25-65 heat exchangers Hot piping Piping 29-108 16-20 boards Hot piping Hot piping Hot piping 100-160 Hot piping, boilers, chimney linings Boilers and tanks 16 Mineral fiber preformed shapes 17 Mineral fiber blankets to 650 35-91 125-160 to 750 37-81 125 18 Mineral wool blocks 450-1000 52-130 175-290 19 Calcium silicate blocks, boards 230-1000 32-85 20 Mineral fiber blocks to 1100 52-130 210
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