Welcome to


Stefan            Rudbäck       

M Sc              & owner of    Matematica


1. Develops and sells flow and energy computers for the industry,

like power plants, oil & gas industry. Based on DPNS tech.

2. Designs and implements energy saving systems in buildings.

Based on Free Heat tech.

3. And consulting.

Examples of applications see below

(Click on the picture to zoom)

More examples of products;


- Processline engineering software för flow in tubes

Calculation of flow measurement, pressure loss, valves, thermodynamics

& energy, can be handled based on best possible scientific standards and tables


-Matematica.LIb online software;

Ex 1; Calculation of flow threw orifice plate, venturi and nozzle flowmeters.

Ex 2; Calculation of power production in power plants.

Ex 3; Calculation of natural gas flow threw a pipeline with 0,1% uncertainty.


Ex of medias handled by Processline/Matematica.lib;

(O2/Ar/N2...,steam, water, natural gas/GNG/Bio gas/Erdgas).


-Free Heat tech

reduces energy consumptions in buildings typical >75%

More iformation see below.

More information;


Marketleading engineering software for flow in tubes.

Ex; Design (including codegeneration for controlsystems) of

standardized dp-flowmeters,like orifice plates,venturis,V-cones and nozzles. Can reduce measurement and calculation error from 10 to<1%.

-Flow/energy hard and soft-computers

Can be delivered as;

1. Hardware; based on ABB or Siemens CPU

2. Software; Deloivered on a CD to be implemented in customer ABB or Siemens CPU.

Ex; Calculates natural gas mass/energy flow with Matematica's;

1. dpns (typical <0,4% unc) technology or 

2. hp (<0,7%) technology .


A function block library for standardized controlsystem (IEC 61131),

like ABB industrial IT and Siemens PCS 7, with scientific accuracy and general applicability.

Ex: Can be used for power calculation of an industrial boiler with a total

calculation uncertainty < 0,5% (much better than typical 5% for a linear


Free Heat tech

reduces energy consumptions in buildings typical >75%

-dpns*-technology improves accuracy, reliability and safety in plants.

*double precision non stop 

If You are interested, read more on this site or please contact;


Stefan Rudbäck, civ ing (M Sc)

skype; stefan.rudback

+46 708387910

PS Dear Mr Putin

Please let Matematica check Your flowmeters for natural gas in and out from Ukraina. Maybe the "disapperance" of gas is a flowmeter problem.