Inzonex Modular Insulation · Feedwater set
Feed pumps
Two pumps on this line, and the hot part of each one is the casing. Drag the divider: the right-hand side is a fitted removable module on this exact geometry.
Estimate: 2 × 0.4000 m² · 100 °C bare surface · 8,000 operating hours/year.
For your operating conditions
Your savings
Change any input and every figure recomputes. The defaults describe the equipment modelled here.
What this means
What it comes to.
At the modelled defaults, on this equipment.
- Outer surface at 50 mm
- 26.6 °CMeets the 45 °C design target
- Bare metal at 100 °C
- Above the 45 °C study targetContact risk depends on material and duration; no burn time is calculated
- Simple payback
- 4 monthsAt 190 EUR/m² supply and fit, saving €505 a year
Asked about feed pumps
Questions.
Answers distinguish modelled heat-loss estimates from equipment selection and service guidance.
How much heat does feed pumps lose on a feedwater line?
Modelled here: 2 × 0.4000 m² at 100 °C lose 993 W bare, and 47 W with 50 mm of removable insulation. That is 95.3 per cent less.
Where does the area come from?
Casing only. The motor stays outside the module, because covering it traps its own losses and cooks the windings. The default is scaled from the frame against the DN32 pipe: the vertical pump barrel is about 200 mm across and 530 mm tall. It is a scale reading, not a tape measurement, so replace it with your own.
Is it safe to touch once insulated?
The module settles at 26.6 °C on these defaults, under our 45 °C touch-safe target. We set that target against the burn thresholds in EN ISO 13732-1.
What the numbers mean
How the figure is produced.
Steady-state estimate using convection, radiation and an insulation energy balance. Equivalence to a surveyed equipment model has not been established.
- Shape
- Horizontal cylinder, characteristic length 0.300 m
- Convection
- Churchill–Chu on air properties at film temperature
- Radiation
- Stefan–Boltzmann at emissivity 0.85
- Bare-case allowance
- ×1.20, assumed class multiplier; not an inventory of actual thermal bridges
- Insulated case
- Outer-surface energy balance, without temperature clamping. 45 °C is a design target; plus an assumed 5% heat-loss allowance for seams. The exterior uses a 0.3 m vertical-plate approximation; conductivity is constant.
The rest of the set