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ALWAYS AVAILABLE ON YOUR MOBILE

THE WHOLE
WORLD OF
THERMODYNAMICS

My Engineering Tools – professional calculators for thermodynamics, turbomachinery, heat pumps and water turbines.

Tools that make engineers' daily work more easier.

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15+
Years Experience
Designed for
Turbomachinery & Cycles
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THE ENGINEER BEHIND THE TOOLS

A project engineer who decided to make thermodynamics easier for everyone.

With more than 15 years of experience as a project engineer for turbomachinery and cycles, thermodynamics is my daily business. My passion for programming led me to create practical tools that help you calculate faster, avoid costly mistakes, and focus on what really matters: efficient solutions.

Every app is built with the same philosophy: simple, reliable, and tailored to real-world engineering needs. Available on your mobile phone or tablet, always with you.

Discover the tools I built
Christian Peter Kaiser
Dipl.-Ing.(FH) Energiesystemtechnik
I believe that great engineering tools should feel like an extension of your own hands. Calculations should be fast, intuitive and always within your reach. That's why every tool was built with real users in mind.
HELPFUL TOOLS FOR TURBINES,
CYCLES AND PROCESS ENGINEERING
MY COLLECTION OF TOOLS

Tools designed for real engineers

From fundamental laws to machine-specific calculations — free and Pro apps for turbines, compressors, expanders and cycles.

AnyGasCompressor app icon
NEW
AnyGasCompressor
Single-stage turbo compressor for many pure gases — Helmholtz equation of state. Numeric input, full h, s, v; solve for power, mass flow or ηs. Air, N2, CO2, H2, CH4, steam and more.
Get on Google Play
AnyGasExpander app icon
NEW
AnyGasExpander
Single-stage turbo expander for many pure gases — Helmholtz equation of state. Numeric input, full h, s, v; wet exhaust shown. Solve for power, mass flow or ηs.
Get on Google Play
Ellipse Law – Stodola’s cone law app icon
FREE
Ellipse Law
Stodola’s cone law for turbomachinery — off-design inlet/outlet pressure and mass flow, optional temperature correction. Fast, free, fresh Material design.
Get on Google Play
Cordier Diagram app icon
FREE
Cordier Diagram
First-shot design for compressors, fans, pumps and turbines. Diameter, flow, speed or specific work — plus impeller type (axial / diagonal / radial) and interactive σ–δ plot.
Get on Google Play
STuC Steam Turbine Calculator app icon
FREE
STuC Steam Turbine Calculator
IAPWS steam expansion — power, mass flow or efficiency with live sliders. Condensing and backpressure turbines, wetness warning. Quick, simple, free.
Get on Google Play
STuC PRO Steam Turbine Calc app icon
PRO
STuC PRO Steam Turbine Calc
Numeric IAPWS precision, full steam properties (h, s, v, quality) and live h–s Mollier diagram. Copy results — built for detailed “what if” checks.
Get on Google Play
AIRExpander app icon
FREE
AIRExpander
Dry-air turbo expander calc — solve for power, mass flow or isentropic efficiency with live sliders. Fresh Material UI, light & dark.
Get on Google Play
AIRExpander Pro app icon
PRO
AIRExpander Pro
Paid companion: precise numeric entry and full dry-air state properties (h, s, v) at inlet and exhaust — same robust thermodynamics as free AIRExpander.
Get on Google Play
AIRCompressor app icon
FREE
AIRCompressor
Dry-air turbo compressor calc — power, mass flow or efficiency with live sliders. Discharge temperature, flows and enthalpy difference at a glance.
Get on Google Play
AIRCompressor Pro app icon
PRO
AIRCompressor Pro
Paid companion: numeric input, full inlet/discharge properties and clipboard export. Same dry-air compression model as free AIRCompressor.
Get on Google Play
Heat Pump Evaluator
LIVE
Heat Pump Evaluator
Lorenz-COP and efficiency for heat pump systems — browser tool, no install.
Open the Tool
WattAFlow
PRO
WattAFlow
Water turbine power and type selection — professional hydropower estimates on the go.
Get on Google Play
WSCycle
COMING SOON
WSCycle – Water Steam Cycle Calculator
Complete cycle simulation: boiler, turbine, condenser, pump, generator — all components recalculate together.
Alberich Enigma M4
EXPERIMENTAL
Alberich – Enigma M4 Simulator
Traditional M4 and Modern rotor mode (ALBV, auto message key, month sheets, courier QR). Web, Android, browser companions and Thunderbird — open source, no tracking.
Open alberich.pro GitHub
The most apps also available on Google Play Store.
APPS • SOFTWARE • EXPERIENCE • PASSION

Why these tools exist

Thermodynamics is not just theory — it’s daily work. As a practicing project engineer I have seen how a single miscalculated parameter can lead to expensive mistakes or missed deadlines. That is why I built these tools: to save time, reduce errors and give engineers back their focus.

Every calculation is tested against real reference data. The interfaces are intuitive even for beginners. And they are completely offline-capable where needed.

01
Fast & Accurate
IAPWS-compliant and Helmholtz EOS calculations. A practical way to move beyond tedious spreadsheets.
02
Mobile First
Works great on phones and tablets. Always in your pocket.
03
Reliable
No Registration, No ads, no tracking. Pure engineering tools.
EXPERIMENTAL TOOL

Alberich: the encryption

Alberich is not a thermodynamics tool — it is an Enigma M4 machine in the browser and on your devices. Traditional mode mirrors the historical, involutory machine; Modern mode adds an experimental rotor protocol for everyday messaging.

  • Modern: free end rotor, notches, Base-26, auto message key, ALBV telegram with HMAC check group
  • Month sheets, networks and sheet word — same algorithm as the Android app
  • Courier: share ciphertext and QR only from the online device
  • Web at alberich.pro, Android, Chrome/Edge/Firefox companions, Thunderbird extension
  • German & English UI · no account · no analytics · AGPL-3.0 on GitHub

Modern is a specified experimental protocol, not a NIST standard — see the project security notes before high-stakes use.

Alberich Enigma Simulator
Open alberich.pro Source on GitHub App on Google Play
LET'S TALK ENGINEERING

Get in touch

Whether you need help with a specific calculation, feedback on an app, or want to discuss custom tools — I'm always happy to hear from fellow engineers.

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