ExCoil

Features

ExCoil provides a complete set of engineering tools for heat exchanger design. From thermal calculations to 3D geometry export, every feature is built for engineering accuracy and practical use.

Thermal Engine

Engineering-grade thermal calculations

Segment-by-segment solver with 50 discretization points. Real refrigerant properties, two-phase heat transfer correlations, fin efficiency calculations, and fouling factors.

NTU-LMTD methods with real property lookups
Six coil types: DX evaporator, DX condenser, CHW, HW, steam, dry cooler
Air-side: Wang et al. and Kim et al. correlations
Fluid-side: Gnielinski, Shah, Dittus-Boelter correlations
Sensible and latent heat with SHR analysis
Thermal calculations
3D visualization
3D Visualization

Interactive 3D geometry and thermal heatmaps

Full 3D model of the heat exchanger with tubes, fins, return bends, and casing. Thermal view overlay shows temperature distribution across the coil with NTU-based per-row calculations.

Real-time 3D rendering with Three.js / React Three Fiber
Thermal heatmap with per-row air temperature distribution
STL export for CAD integration
Screenshot capture for reports and proposals
Tooltip on return bends showing circuit and temperature data
Circuit Design

Automatic circuiting and engineering drawings

Generate circuit configurations automatically. Visual 2D diagram with left/right side views. Export professional dimensional drawings in PDF with ISO-standard annotations.

Same-side and opposite-side connection modes
Balanced and unbalanced tube distribution
2D circuit diagram with color-coded circuits
PDF dimensional drawing with ISO title block
Dimension lines: Pt, Pl, Do, height, depth
Circuit design

Additional capabilities

Psychrometric Calculator

Interactive chart with 10 air properties, 5 HVAC processes, and ASHRAE equations. Free to use.

PDF Technical Reports

Comprehensive reports with calculation breakdown, performance curves, and engineering data.

Coil Comparison

Compare multiple coil configurations side by side. Analyze capacity, pressure drop, and cost trade-offs.

Project Manager

Organize calculations by project. Save, revisit, and share engineering data across your team.

Dehumidifier Builder

Design dehumidification systems with cooling coil, reheat coil, and compressor selection.

Calculation History

Every calculation is saved automatically. Review, compare, and restore previous designs.

Start using ExCoil

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