Fusiotherm Piping An Analysis

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Fusiotherm Piping An Analysis
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Fusiotherm Piping Analysis

• Fusiotherm piping
• A PPR-80 Polypropylene piping manufactured by
  aquatherm
• It has a low thermal conductivity, k 0.15
  W/m.K (cf. steel or copper piping, k 500 W/m.K)
• The low k-value allows the possibility of a
  reduced insulation thickness in comparison with
  steel or copper piping

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Fusiotherm Piping Analysis

• The thermal performance of fusiotherm and steel
  piping was modelled to find
• Temperature at the outside surface of the
  insulation
• Heat loss per metre of piping
• Two sets of formulae were used, giving two sets
  of results
• ASHRAE
• CIBSE
• The models included the insulating effect of the
  pipe wall, any added insulation and a surrounding
  air film

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Fusiotherm Piping Analysis

• CIBSE formulae p C3-15 CIBSE guide, eqns C3.59
  C3.63

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Fusiotherm Piping Analysis

• ASHRAE formulae p 20.9 ASHRAE fundamentals,
• eqns (6), (9) and (10)

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Fusiotherm Piping Analysis

• Model Parameters
• 11 pipe diameters between 20 mm and 160 mm, with
  corresponding wall thicknesses from 2.8 to 21.9
  mm
• Four water temperatures 6C, 12C, 45C, 60C
• Two materials fusiotherm (k 0.15 W/m.K) and
  steel (k 500 W/m.K)
• Heat loss per metre of piping and insulation
  surface temperature calculated for 4 situations
  
• fusiotherm (bare, 12 mm, 19 mm)
• steel (25 mm).
• Over 100 mm nominal bore, fusiotherm requires 25
  mm insulation and steel requires 35 mm.

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Fusiotherm Piping Analysis
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Fusiotherm Piping Analysis
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Fusiotherm Piping Analysis
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Fusiotherm Piping Analysis
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Fusiotherm Piping Analysis
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Fusiotherm Piping Analysis

• Conclusions
• 19 mm insulation on fusiotherm matches the
  performance of 25 mm insulation on steel, in both
  heat loss and surface temperature values
• Surface temperature of fusiotherm 12 mm
  insulation is within 1C of steel 25 mm
  insulation (and fusiotherm 19 mm)
• The heat loss difference for 12 mm cf. 19 mm
  insulation on fusiotherm is between 2 W/m and 10
  W/m (60C _at_ 110 mm Ø)
• Bare fusiotherm will lose between 20 and 70 W/m
  (65C _at_ 20 160 mm Ø)