Pipe insulation series

Often district heating pipes are pre-insulated rigid steel pipes, which can have different insulation classes.

The optimizer routine utilizes information on the pipe properties from the ESDL Energy Data Repository (EDR). This repository contains pipe properties for bonded pipe systems of district heating pipes with different insulation series from the Logstor catalog. It contains the following properties for several DN sizes:

  • name: Type of material - insulation class - DN size.

  • inner_diameter: inner diameter of the pipe [m].

  • u_1: thermal transmittance (i.e., U-value) 1 [Wm-2 K-1].

  • u_2: thermal transmittance (i.e., U-value) 2 [Wm-2 K-1].

  • insulation_thicknesses: ordered list (from inner layer outwards) of thicknesses of the insulation layers in [m].

  • conductivities_insulation: ordered list (from inner layer outwards) of conductivity in [W/mK].

  • investment_costs: combined installation and investment cost [€/m].

For all insulation classes and pipe diameters, the conductivities are 52.15 W/mK, 0.027 W/mK and 0.4 W/mK, for the steel, PUR and PE layers, respectively.

Table 9, Table 10 and Table 11 show the available properties for insulation classes S1, S2 and S3, respectively. Note that currently, the optimizer routine only supports the Steel-S1 class.

Table 9 Steel S1 properties

name

inner_diameter

u_1

u_2

thicknesses

investment_costs

Steel-S1-DN-20

0.0217

0.1426

0.00364

0.0026, 0.02855, 0.003

696.3

Steel-S1-DN-25

0.0285

0.1760

0.00554

0.0026, 0.02515, 0.003

709.3

Steel-S1-DN-32

0.0372

0.1795

0.00534

0.0026, 0.0308, 0.003

727.9

Steel-S1-DN-40

0.0431

0.2083

0.00719

0.0026, 0.02785, 0.003

749.7

Steel-S1-DN-50

0.0545

0.2339

0.00861

0.0029, 0.02935, 0.003

778.0

Steel-S1-DN-65

0.0703

0.2783

0.01162

0.0029, 0.02895, 0.003

822.4

Steel-S1-DN-80

0.0825

0.2869

0.01164

0.0032, 0.03255, 0.003

869.4

Steel-S1-DN-100

0.1071

0.2996

0.01144

0.0036, 0.03965, 0.0032

936.1

Steel-S1-DN-125

0.1325

0.3507

0.01478

0.0036, 0.03925, 0.0034

1026.9

Steel-S1-DN-150

0.1603

0.4210

0.02016

0.004, 0.03725, 0.0036

1126.4

Steel-S1-DN-200

0.2101

0.4576

0.02098

0.0045, 0.004385, 0.0041

1355.3

Steel-S1-DN-250

0.263

0.4357

0.01650

0.005, 0.0587, 0.0048

1630.7

Steel-S1-DN-300

0.3127

0.5051

0.02057

0.0056, 0.05785, 0.0052

1962.1

Steel-S1-DN-350

0.3444

0.4880

0.01793

0.0056, 0.0666, 0.0056

2360.9

Steel-S1-DN-400

0.3938

0.5167

0.01861

0.0063, 0.0711, 0.0057

2840.6

Steel-S1-DN-450

0.4444

0.5157

0.01706

0.0063, 0.0805, 0.006

3417.9

Steel-S1-DN-500

0.4954

0.4959

0.01447

0.0063, 0.0944, 0.0066

4112.5

Steel-S1-DN-600

0.5958

0.6134

0.02026

0.0071, 0.0872, 0.0078

5953.9

Steel-S1-DN-700

0.695

0.7060

0.02455

0.008, 0.0858, 0.0087

8619.6

Steel-S1-DN-800

0.7954

0.8032

0.02928

0.0088, 0.0841, 0.0094

12479.0

Steel-S1-DN-900

0.894

0.8980

0.03399

0.01, 0.0828, 0.0102

18066.3

Steel-S1-DN-1000

0.994

1.0000

0.03936

0.011, 0.081, 0.0011

26155.2

Steel-S1-DN-1100

1.096

1.1045

0.04510

0.011, 0.0792, 0.0118

37865.8

Steel-S1-DN-1200

1.194

1.2036

0.05052

0.0125, 0.078, 0.0125

54819.7
Table 10 Steel S2 properties

name

inner_diameter

u_1

u_2

thicknesses

investment_costs

Steel-S2-DN-20

0.0217

0.1211

0.00244

0.0026, 0.03855, 0.003

696.3

Steel-S2-DN-25

0.0285

0.1444

0.00346

0.0026, 0.03515, 0.003

709.3

Steel-S2-DN-32

0.0372

0.1574

0.00390

0.0026, 0.0383, 0.003

727.9

Steel-S2-DN-40

0.0431

0.1791

0.00505

0.0026, 0.03535, 0.003

749.7

Steel-S2-DN-50

0.0545

0.2014

0.00609

0.0029, 0.03685, 0.003

778.0

Steel-S2-DN-65

0.0703

0.2271

0.00730

0.0029, 0.03895, 0.003

822.4

Steel-S2-DN-80

0.0825

0.2382

0.00761

0.0032, 0.04255, 0.003

869.4

Steel-S2-DN-100

0.1071

0.2478

0.00738

0.0036, 0.05195, 0.0034

936.1

Steel-S2-DN-125

0.1325

0.2878

0.00943

0.0036, 0.05155, 0.0036

1026.9

Steel-S2-DN-150

0.1603

0.3286

0.01156

0.004, 0.05195, 0.0039

1126.4

Steel-S2-DN-200

0.2101

0.3463

0.01121

0.0045, 0.06345, 0.0045

1355.3

Steel-S2-DN-250

0.263

0.3346

0.00904

0.005, 0.0833, 0.0052

1630.7

Steel-S2-DN-300

0.3127

0.3846

0.01114

0.0056, 0.08245, 0.0056

1962.1

Steel-S2-DN-350

0.3444

0.3681

0.00945

0.0056, 0.0962, 0.006

2360.9

Steel-S2-DN-400

0.3938

0.3816

0.00935

0.0063, 0.1052, 0.0066

2840.6

Steel-S2-DN-450

0.4444

0.3801

0.00850

0.0063, 0.1193, 0.0072

3417.9

Steel-S2-DN-500

0.4954

0.4310

0.00734

0.0063, 0.1381, 0.0079

4112.5

Steel-S2-DN-600

0.5958

0.6134

0.00915

0.0071, 0.1363, 0.0087

5953.9
Table 11 Steel S3 properties

name

inner_diameter

u_1

u_2

thicknesses

investment_costs

Steel-S3-DN-20

0.0217

0.1107

0.00192

0.0026, 0.04605, 0.003

696.3

Steel-S3-DN-25

0.0285

0.1298

0.00265

0.0026, 0.04265, 0.003

709.3

Steel-S3-DN-32

0.0372

0.1419

0.00303

0.0026, 0.0458, 0.003

727.9

Steel-S3-DN-40

0.0431

0.1594

0.00381

0.0026, 0.04285, 0.003

749.7

Steel-S3-DN-50

0.0545

0.1731

0.00424

0.0029, 0.04685, 0.003

778.0

Steel-S3-DN-65

0.0703

0.1955

0.00513

0.0029, 0.04895, 0.003

822.4

Steel-S3-DN-80

0.0825

0.2075

0.00549

0.0032, 0.05235, 0.003

869.4

Steel-S3-DN-100

0.1071

0.2146

0.00525

0.0036, 0.06425, 0.0036

936.1

Steel-S3-DN-125

0.1325

0.2414

0.00624

0.0036, 0.06625, 0.0039

1026.9

Steel-S3-DN-150

0.1603

0.2673

0.00717

0.004, 0.06925, 0.0041

1126.4

Steel-S3-DN-200

0.2101

0.2783

0.00674

0.0045, 0.08565, 0.0048

1355.3

Steel-S3-DN-250

0.263

0.2771

0.00579

0.005, 0.1079, 0.0056

1630.7

Steel-S3-DN-300

0.3127

0.3060

0.00653

0.0056, 0.11205, 0.006

1962.1

Steel-S3-DN-350

0.3444

0.2934

0.00553

0.0056, 0.1306, 0.0066

2360.9

Steel-S3-DN-400

0.3938

0.3009

0.00533

0.0063, 0.1446, 0.0072

2840.6

Steel-S3-DN-450

0.4444

0.3001

0.00486

0.0063, 0.1636, 0.0079

3417.9

Steel-S3-DN-500

0.4954

0.2942

0.00426

0.0063, 0.1873, 0.0087

4112.5