Pumps and Compressors



Niklas Mirsch



+49 241 80 48051




The lecture and the exercises take place in the summer semester.



Consultation-hours by appointment. Please contact us.



The lecture covers the fundamentals of fluid transportation using suitable examples. A main focus of the lecture lies on the classification of the versatile reciprocating engines regarding their design features like the type of piston travel, the piston guide, the volume change of the workspace or the control of the workspace openings. Besides a historical review there are also going to be numerous execution examples of present-day reciprocating engines.

Furthermore the calculation of the drive capacity as well as the output of the particular compressor type is executed on a thermodynamic basis. The observation of the energy balance shows the magnitude of the occurring loss portion.

For the energy transition, hydrogen is being used as an energy storage medium and for the energy transport. Due to the low density of hydrogen, it must be compressed to high pressures. Only reciprocating compressors and diaphragm compressors can be considered for this purpose, as they are characterized by excellent efficiency and low leakage losses compared to all other compression principles. These relationships are explained.

The last part of the lecture focuses on the static and dynamic calculation of pumps which contrary to compressors are able to convey fluid matter.



The following topics are dealt with:

  • Basic Output Principles
  • Classification of Pumps and Compressors according to Design Features
  • Calculation of Compressors
  • Regulation of Compressors
  • Calculation of Piston Pumps

Teaching and learning portal

Complementary lecture and exercise documents as well as older exams for exam preparation can be found at RWTHmoodle.

Complementary documents are also available at RWTHonline.



Please keep further notices on the exam in mind.



  Name Contact
Klaus Hoff
Tel.: +49 2451 48161
Fax: +49 2451 481400
Professional experience Demag ( heute Siemens) Development Engineer - Single-shaft centrifugal compressors 5 years
NEUMANN & ESSER Technical Manager - Piston compressors and grinding plants 18 years
Hofer (NEA GROUP) Managing Director - Diaphragm and piston compressors 3 years
Current position NEUMANN & ESSER Technical Manager - Compressors since 3 years