01
Project Information
Auto-saved · snapshots via Rev+Hist
Revision snapshots
02
Fluid Streams
HOT
COLD
Selecting a fluid preset evaluates ρ, Cp, μ, k at the local mean temperature on every recalculation (mean-property iteration); editing any property switches that side back to Custom. Phase sides: set both temperatures to Tₛₐₜ; duty = ṁ·hᵅₐ·Δx.
03
Arrangement & Overall U
Ft solver (v3: numerical P-NTU inversion)
From the terminal temperatures the solver computes ε and C*, numerically inverts the arrangement's ε-NTU relation by bisection to find the actual NTU, and takes Ft = NTUₐ€/NTU (counter-current reference). Exact for every arrangement including all four crossflow mixing cases; isothermal phase change returns Ft = 1 automatically.
06
Overall U
Bell-Delaware factors & segmented solver (live)
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04
Shell & Tube Geometry
v3 thermal solving is segment-by-segment (12 duty slices) with local property evaluation per slice when fluid presets or phase change are active; lumped and segmented areas are both reported.
05
Mechanical / TEMA Screening
v3 adds: tubesheet bending stress, nozzle reinforcement area, thermal stress σ=EαΔT, fatigue cycle estimate (S-N screening), Euler tube buckling under differential-expansion load, nozzle spacing and gasket seating (y, m) checks. Screening only - not a code calculation.
06
Economics & Optimization
Current design economics
CAPEX (purchased, est.)--
Annualized capital--
Pumping OPEX /yr--
Fouling/cleaning /yr--
Total annual cost--
Scenario A vs B
Save the current design to slot A, change it, save to B, and compare.
Opt
Optimizer results
| Run the optimizer to sweep tube length, tube passes and shell passes for minimum total annual cost (subject to Ft ≥ 0.75, 0.5 ≤ v ≤ 3.5 m/s, ΔP ≤ 150 kPa). |
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T-Q Diagram
07
Bundle Layout (to scale)
07
Thermal Resistance Network
07
Pressure-Drop Breakdown
Tube side
Shell side
07
Local U along duty (segmented)
07
Fouling Evolution (service U vs months)
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Detailed Results
09
Industrial Datasheet
10
Heat Recovery Network (pinch-lite)
SI: kW/K, °C · current exchanger streams auto-includedExtra stream 1
Extra stream 2
CC
Composite Curves & Energy Targets
Enable sensible streams to compute targets.
VLE
Binary VLE (ideal / Raoult) - glide screening
Pick two components to estimate bubble point, dew point and glide.
Train
Series train split of current duty
11
Industrial Export Suite
Generated in-browser, zero dependencies, offlineAppr
Approval Workflow
Files are named with the project slug: _datasheet.pdf, _calculations.xlsx, _summary.csv, _project.json, _engineering.xml, _bom.csv, _revision-report.pdf, _nozzle-schedule.xlsx, _geometry.dxf.
10
Design Advisor
Design confidence
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Confidence reflects how far the design sits inside the validity envelope of the correlations used.
Regime summary
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AI