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gtbpdc

Pressure Drops

Hydraulic network pressure drops — Darcy, local losses.

  • darcy
  • local losses
Circuit

Sections (1)

01

Fittings (1)

V
0.53 m/s
Re
25,691
ΔP/m
169 Pa/m
Section ΔP
1.74 kPa · 100 %

Total head

1.74kPa

0.18 mCE · 0.017 bar

Breakdown

linear
96.8 %
fittings
3.2 %
equipment
0 %

Verdict

Borderline

1 alert · 1 section

V min/max : 0.53 → 0.53 m/s · Avg ΔP/m : 169 Pa/m · Most penalising : Section 1 (100 %)

Aggregated fittings

TypeQtyTotal ΔP
90° long-radius elbow (R/D ≥ 1.5)20.06 kPa

Alerts

  • Section T1: velocity 0.53 m/s < 0.8 m/s recommended for this type.
Fluid assumptions
ρ
977.8 kg/m³
ν
0.413 mm²/s
μ = ρ·ν
0.404 mPa·s
cp_vol
1.138 kWh/(m³·K)
Source
NIST IAPWS-IF97
References
NF EN 805 (Darcy), NF EN 60534-2-1 (Kvs), NF EN 12828 (velocities), Serghides 1984.

Hydraulic pressure drop — series network

Pressure drop calculation for a series hydraulic circuit: heating, chilled water, DHW recirculation, geothermal or heat pump. Darcy-Weisbach equation, Colebrook friction factor via the Serghides approximation, minor losses by ζ coefficient, Kvs valves (NF EN 60534-2-1) and terminal equipment with manufacturer ΔP. Works with pure water and glycol mixtures (MEG / MPG).

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