Ultimate Pipe Calculation V1.0.xls
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- Words: 454
- Pages: 3
Coefficients
DATE: Supercedes:
Excel Calculation Tool
Pipe sections Worksheet designed by: Tom Smales Adapted to U Thermo range by : Paul Delouche Description:
This excel calulation tool provides an approximate estimation of the heat loss and surface temperature of the insulation system. This basic tool can be used to estimate the product performance and thickness required when choosing the appropriate insulation materials. The results are purely indicative.and the design of the complete insulation system and final choices made concerning the products used and the thicknesses to be installed are entirely the responsability of the designer
Conductivity =a+b*T+c*T2+d*T3 coefficients λ
Temperatures Thermal conductivity (λ lambda)
Product U Thermo Pipe
a
b
3.25E-02
7.04E-05
50
100
150
200
300
400
500
U Thermo Pipe**
0.037
0.043
0.051
0.060
0.083
0.111
0.143
°C W/m.K
c
d
3.58E-07 -1.11E-10
Product for comparison (values to enter)
** in blue, values measured according to EN 8 497 in accredited laboratory
Comparison of the thermal conductivity of the U Thermo pipe with chosen product
Lambda (W/m.K)
0.24
U Thermo Pipe
0.22
Product for comparison (polynomial tendancy curve)
0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0
0
100
200
300
400
500
600
Temperature (°C)
Isover, a division of Saint-Gobain Construction Products South Africa (Pty) Ltd Iron Road, New Era, Springs, 1560 Tel: (011) 360-8200 Fax: (011) 813-4414 Web Address: www.isover.co.za
Page 1
700
800
Coefficients
2010.07.21 2004 version
surface temperature of the e and thickness required when
and final choices made esponsability of the designer
600 0.180
700 0.219
s measured according to EN 8 497 in accredited laboratory
product
600
700
800
(Pty) Ltd 13-4414
Page 2
DATE: Supercedes:
2010.07.21 2004 version
Pipe sections calculation Calculation for a single Pipe section Worksheet designed by: Tom Smales Adapted to U Thermo range by : Paul Delouche
Client Date Project reference
U Thermo Pipe
PARAMETER
TERM Tp
UNIT °C
600
Ambient air temperature
Ta
°C
25
Enter actual ambient temperature
External surface temperature
Ts
°C
84
Enter required insulation surface temperature
Mean temperature of insulation
Tm
°C
342
Thickness of insulation Thermal conductivity Safety factor Surface heat transfer coefficient
d λ
mm W/m.K %
Surface temperature of pipe
Pipe diameter
f dp
Lagged pipe diameter
ds
Factor Heat flow External surface temperature
VALUE
100 0.094 0% 5.7
mm
160
mm ln (ds/dp)
360
Q' Ts
REMARKS Enter actual pipe temperature
Use this cell as the 'by changing cell' in GOAL SEEK
Aluminium=5.7, Galvanised=6.3, Unclad=10 Enter actual pipe external diameter
0.811
W/m
376.3
°C
83.4
Use this cell as the 'set cell' in GOAL-SEEK
Isover, a division of Saint-Gobain Construction Products South Africa (Pty) Ltd Iron Road, New Era, Springs, 1560 Tel: (011) 360-8200 Fax: (011) 813-4414 Web Address: www.isover.co.za
DATE: Supercedes:
Excel Calculation Tool
Pipe sections Worksheet designed by: Tom Smales Adapted to U Thermo range by : Paul Delouche Description:
This excel calulation tool provides an approximate estimation of the heat loss and surface temperature of the insulation system. This basic tool can be used to estimate the product performance and thickness required when choosing the appropriate insulation materials. The results are purely indicative.and the design of the complete insulation system and final choices made concerning the products used and the thicknesses to be installed are entirely the responsability of the designer
Conductivity =a+b*T+c*T2+d*T3 coefficients λ
Temperatures Thermal conductivity (λ lambda)
Product U Thermo Pipe
a
b
3.25E-02
7.04E-05
50
100
150
200
300
400
500
U Thermo Pipe**
0.037
0.043
0.051
0.060
0.083
0.111
0.143
°C W/m.K
c
d
3.58E-07 -1.11E-10
Product for comparison (values to enter)
** in blue, values measured according to EN 8 497 in accredited laboratory
Comparison of the thermal conductivity of the U Thermo pipe with chosen product
Lambda (W/m.K)
0.24
U Thermo Pipe
0.22
Product for comparison (polynomial tendancy curve)
0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0
0
100
200
300
400
500
600
Temperature (°C)
Isover, a division of Saint-Gobain Construction Products South Africa (Pty) Ltd Iron Road, New Era, Springs, 1560 Tel: (011) 360-8200 Fax: (011) 813-4414 Web Address: www.isover.co.za
Page 1
700
800
Coefficients
2010.07.21 2004 version
surface temperature of the e and thickness required when
and final choices made esponsability of the designer
600 0.180
700 0.219
s measured according to EN 8 497 in accredited laboratory
product
600
700
800
(Pty) Ltd 13-4414
Page 2
DATE: Supercedes:
2010.07.21 2004 version
Pipe sections calculation Calculation for a single Pipe section Worksheet designed by: Tom Smales Adapted to U Thermo range by : Paul Delouche
Client Date Project reference
U Thermo Pipe
PARAMETER
TERM Tp
UNIT °C
600
Ambient air temperature
Ta
°C
25
Enter actual ambient temperature
External surface temperature
Ts
°C
84
Enter required insulation surface temperature
Mean temperature of insulation
Tm
°C
342
Thickness of insulation Thermal conductivity Safety factor Surface heat transfer coefficient
d λ
mm W/m.K %
Surface temperature of pipe
Pipe diameter
f dp
Lagged pipe diameter
ds
Factor Heat flow External surface temperature
VALUE
100 0.094 0% 5.7
mm
160
mm ln (ds/dp)
360
Q' Ts
REMARKS Enter actual pipe temperature
Use this cell as the 'by changing cell' in GOAL SEEK
Aluminium=5.7, Galvanised=6.3, Unclad=10 Enter actual pipe external diameter
0.811
W/m
376.3
°C
83.4
Use this cell as the 'set cell' in GOAL-SEEK
Isover, a division of Saint-Gobain Construction Products South Africa (Pty) Ltd Iron Road, New Era, Springs, 1560 Tel: (011) 360-8200 Fax: (011) 813-4414 Web Address: www.isover.co.za
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