IsoDim

Project information (name, reference, person):

Select calculation type:

Pipe

Circular duct

Rectangular duct

Int. insulated duct

Surface

Int. insulated surface

Orientation

Horizontal

Vertical

Select calculation criteria:

Heat loss for a given insulation thickness

Insulation needed for a given surface temp.

Maximum surface temp. [°C]:

Insulation needed for a given heat loss

Maximum heat loss [W/m]:

Insulation needed according to EN 12828

Energy waste factor (0-1):

Given insulation class (EN 12828)

Insulation class (1-6):

Facing (outside surface)

User defined emissivity:

Dimensions

Pipe material:	Duct diameter [mm]:	Height duct/surface [mm]:	Width duct [mm]:
Pipe dimension:	Length pipe/duct [m]:	Surface area [m²]:	Uninsulated emissivity:
User defined pipe dimension	Outer diameter [mm]:	Wall thickness [mm]:

Insulation (1st layer)


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Conditions

Indoors	Ambient temp. [°C]:	Temp. media [°C]:
Outdoors	Wind velocity [m/s]:
Given heat transfer coeff. [W/m²K]:

2nd layer of insulation


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Calculate energy use

Operating hours [h/year]:
Energy cost pr kWh:
CO2-emission [g/kWh]:
Currency:

Valves, fittings and flanges

3rd layer of insulation


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Uninsulated suspensions

Additional heat loss is calculated according to table A.1 in ISO 12241

Select type:
User defined:
Eq. pipe length [m]:
Number of units:

Calculated results	Value

Calculated results	Needed insulation thickness	Std. insulation thickness

Project information (name, reference, person):

Select calculation type:

Pipe

Circular duct

Rectangular duct

Internally insulated duct

Calculate annual consumption

Operating hours [h/year]:
CO2-emission [g/kWh]:
Energy cost pr kWh:
Currency:

Media/fluid (always air in ducts)

User defined fluid

Density [kg/m³]:
Thermal capacity [J/kgK]:
Freezing point [°C]:

Inlet temperature [°C]:

Media/fluid temperature at inlet

Pipe/duct sections

Section of pipe/duct, enter data for a section below and then press 'Add section' to update the calculation

Description of section

Orientation
Horizontal	Vertical
Uninsulated section
Emissivity uninsulated:

Pipe material:
Pipe dimension:
User defined pipe dimension
Outer diameter [mm]:
Wall thickness [mm]:

Duct diameter [mm]:
Height duct [mm]:
Width duct [mm]:
Length pipe/duct [m]:

Insulation (1st layer)


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Facing (outside surface)


User defined facing, emissivity:

Uninsulated suspensions

Additional heat loss is calculated according to table A.1 in ISO 12241

2nd layer of insulation


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Conditions

Indoors	Ambient temp. [°C]:
Outdoors	Wind velocity [m/s]:	Heat transfer coeff. [W/m/²K]:
Given heat transfer coeff.

Valves, fittings and flanges

Select type:
User defined type:
Eq. pipe length [m]:
Number of units:

Section	Temp. at outlet	Heat loss	Ext. heat transfer coeff.

Section	Temp. at outlet	Heat loss	Ext. heat transfer coeff.	Int. heat transfer coeff.

Summary	Value

Total heat loss

Average heat loss

Annual energy consumption

Annual CO2-emission

Annual energy cost

Project information (name, reference, person):

Select shape:

Cube

Cylinder

Sphere

Dimensions (internal)

Diameter [m]:
Length [m]:
Height [m]:
Width [m]:
Depth [m]:

Calculation criteria

Calculate media temperature after storage time
Calculate storage time until final media temperature
Initial media/fluid temperature [°C]:
Storage time [h];
Final media temperature [°C]:

Media/fluid

User defined fluid

Density [kg/m³]:
Thermal capacity [J/kgK]:
Freezing point [°C]:

Conditions

Indoors	Ambient temp. [°C]:
Outdoors	Wind velocity [m/s]:
Given heat transfer coeffisient [W/m/²K]:

Insulation


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Facing (outside surface)

User defined facing, emissivity:

Description	Value

Media temperature during storage time

Project information (name, reference, person):

Select calculation type:

Pipe

Circular duct

Rectangular duct

Int. insulated duct

Surface

Int. insulated surface

Orientation

Horizontal

Vertical

Dimensions

Pipe material:
Pipe dimension:
User defined pipe dimension
Outer diameter [mm]:
Wall thickness [mm]:
Duct diameter [mm]:
Height duct/surface [mm]:
Width duct [mm]:

Facing (outside surface)


User defined facing, emissivity:

Conditions

Indoors	Ambient temp. [°C]:	Temp. media [°C]:
Outdoors	Wind velocity [m/s]:	Relative humidity [%]:
Given heat transfer coeff. [W/m²K]:

Insulation

Calculated results	Value

Calculated results	Needed insulation thickness	Std. insulation thickness

Project information (name, reference, person):

Select duct type:

Circular duct

Rect. duct

Orientation

Horizontal

Vertical

Dimensions

Diameter [mm]:
Height [mm]:
Width [mm]:
Length [m]:

Media

Inlet temp. [°C]:

Rel. humidity [%]:

Facing (outside surface)


User defined facing, emissivity:

Conditions

Indoors	Ambient temp. [°C]:
Outdoors	Wind velocity [m/s]:
Given heat transfer coeff. [W/m²K]:

Insulation

Uninsulated suspensions

Additional heat loss is calculated according to table A.1 in ISO 12241

Calculated results	Value

Calculated results	Needed insulation thickness	Std. insulation thickness

Project information (name, reference, person):

Orientation

Horizontal

Vertical

Dimensions

Pipe material:
Pipe dimension:
User defined pipe dimension
Outside diameter (pipe) [mm]:
Wall thickness (pipe) [mm]:
Emissivity bare pipe:

Media

Start temperature [°C]:
Freezing degree [%]:

Conditions

Indoors	Ambient temp. [°C]:
Outdoors	Wind velocity [m/s]:
Given heat transfer coeff. [W/m²K]:

Insulation


Insulation thickness (standard) [mm]:
User defined thickness [mm]:

Facing (outside surface)


User defined facing, emissivity:

Calculated results	Value

Project information (name, reference, person):

Type of sound trap

Circular

Rectangular

Horizontal

Vertical

Duct dimensions

Diameter [mm]:
Height [mm]:
Width [mm]:

Product (sound trap)


Insulation thickness [mm];

User defined sound trap


Insulation thickness [mm]:
Absorption factor at 125 Hz:
Absorption factor at 250 Hz:
Absorption factor at 500 Hz:
Absorption factor at 1000 Hz:
Absorption factor at 2000 Hz:
Absorption factor at 4000 Hz:

Results are only valid when:

1. Ducts are straight

2. Rectangular ducts are close to quadratic

3. The Acoustic cross section should be less than 430 mm for frequencies up to 2000 Hz

4. The Acoustic cross section should be less than 200 mm for frequencies above 2000 Hz

5. Calculated sound attenuation is valid for duct lengths up to 5 times the duct dimension

6. Resonance from the duct is not included in the calculation

Calculated sound attenuation

Calculated results	Value

Project information (name, reference, person):

Select calculation type:

Pipe

Circular duct

Rectangular duct

Internally insulated duct

Surface

Int. insulated surface

Orientation

Horizontal

Vertical

Dimensions

Pipe material:
Pipe dimension:
User defined pipe dimension
Outside diameter (pipe) [mm]:
Wall thickness (pipe) [mm]:
Duct diameter [mm]:
Height duct [mm]:
Width duct [mm]:
Uninsulated emissivity:

Conditions

Indoors	Ambient temp. [°C]:	Temp. media [°C]:
Outdoors	Wind velocity [m/s]:
Given heat transfer coeff. [W/m²K]:

Insulations

Economical data

Energy cost pr kWh:		Operating hours [h/year]:
CO2-emission [g/kWh]:		Depreciation time [yrs]:
Energy inflation rate [%]:		Discount rate [%]:
Currency:

Insulation


Insulation thickness (standard) [mm]:
User defined thickness [mm]:
Total cost pr meter:

Facing (outside surface)


User defined facing, emissivity:

Insulation/cost	CO2-emission	U-value	Heat loss	Ext. heat transfer coeff.

Insulation/cost	Pay-back time	Annual energy cost	Annual inv. cost	Total cost