Designed. Built.
Measured.
Engineering calculators for everyday process work, and hands-on projects from thermoelectric baths to rocket feed systems.
Engineering math,
right in the browser.
More than 50 chemical engineering calculators with their theory — instant results, no software to install.
Fluid flow
Orifice, Pitot and relief flow, valve Cv, pipe and packed-bed pressure drop, line sizing, pumps and NPSH, compressors, vacuum, settling.
OpenHeat transfer
Insulation, tube and natural convection, fins and heatsinks, radiation, transient cooling, LMTD and ε-NTU heat exchangers, dew point.
OpenReaction engineering
CSTR, PFR and batch sizing, Arrhenius, space velocity, Thiele modulus, Mears and Weisz–Prater, adiabatic rise.
OpenThermodynamics
Peng–Robinson real-gas properties, vapour pressure, bubble and dew points, sensible heat and adiabatic flame temperature.
OpenSeparations & control
Shortcut distillation, Kremser absorbers, flash drums, gas diffusivity and PID controller tuning.
OpenMechanical, propulsion & lab
O-ring gland design, pressure vessels, rocket nozzle and injector sizing, N₂O tanks, Peltier modules, solution preparation and gas mixtures.
OpenWorked reactor models
Industrial reactors modeled from the governing equations, with theory, results and Python and MATLAB code on a single page.
Methanol reactor modeling
Quench converter, boiling-water-cooled tubular reactor and the full synthesis loop with recycle and purge, on Vanden Bussche–Froment kinetics.
Open the model
Steam reforming reactor modeling
The equilibrium limit, a fired reformer tube with wall temperatures and pressure drop, and an autothermal reformer, on Xu–Froment kinetics.
Open the model
Nitric acid process modeling
The Ostwald process in a dual-pressure plant: adiabatic ammonia burner, third-order NO oxidation with N₂O₄ and N₂O₃, and the nitrous-gas train checked against the flow sheet.
Open the model
Air separation modeling
Nitrogen from air three ways: the phase equilibrium of liquid air and the double-column pressures, a single cryogenic column solved stage by stage, and a hollow-fibre membrane unit.
Open the modelIdeas, turned into hardware.
Every project has its own page with the full story, the numbers and the photos.
Thermoelectric Cooling Bath
A solid-state, sub-zero laboratory bath built from four Peltier modules, a 3D-printed body and an Arduino controller — for about $105.
Zeolite Bed Temperature Profile
The heat of water adsorption in a 13X bed, read from a thermal camera and compared pixel by pixel with a 2D axisymmetric adsorption model.
B3 Liquid Rocket Feed System
Pressure-fed gaseous-oxygen / Jet A-1 feed system for a 100 N liquid rocket engine, modelled in Simscape before a single fitting was tightened.
Single-Piece Orifice Flowmeter
An 80 Nm³/h orifice meter turned from a single bar of metal on a lathe, designed around ISO 5167-2 and calibrated for the rocket feed system.
Inclined-Manometer Pitot Flowmeter
A low-cost Pitot-tube air flowmeter read on an inclined liquid manometer whose angle is set with 3D-printed wedges, covering about 10–100 Nm³/h.
Chem-E-Car
A shoebox-sized car powered by an aluminium–air battery and stopped by an iodine clock reaction, built with our AIChE student team.
A7 Liquid Rocket Engine
The next step after the B3 feed system: designing a larger liquid-propellant rocket engine and the hardware around it.
TCD Detector
Building a thermal conductivity detector for gas analysis — the classic, robust workhorse of gas chromatography.
Just an engineer
who likes to build.
A chemical engineer working on pilot-scale process systems — high-pressure gas handling, reactor heating and control, flow measurement and laboratory instrumentation. This site is where the builds, the data and the lessons learned are kept.