Module Description

Module: Air Conditioning


Air ConditioningLecture3Summer Semester
Air ConditioningRecitation Section (large)1Summer Semester

Module Responsibility:

Prof. Gerhard Schmitz

Admission Requirements:


Recommended Previous Knowledge:

Technical Thermodynamics I, II, Fluid Dynamics, Heat Transfer

Educational Objectives:

Professional Competence

Theoretical Knowledge

Students know the different kinds of air conditioning systems for buildings and mobile applications and how these systems are controlled. They are familiar with the change of state of humid air and are able to draw the state changes in a h1+x,x-diagram. They are able to calculate the minimum airflow needed for hygienic conditions in rooms and can choose suitable filters. They know the basic flow pattern in rooms and are able to calculate the air velocity in rooms with the help of simple methods. They know the principles  to calculate an air duct network. They know the different possibilities to produce cold and are able to draw these processes into suitable thermodynamic diagrams. They know the criteria for the assessment of refrigerants.


Students are able to configure air condition systems for buildings and mobile applications.  They are able to calculate an air duct network and have the ability to perform simple planning tasks, regarding natural heat sources and heat sinks. They can transfer research knowledge into practice. They are able to perform scientific work in the field of air conditioning.

Personal Competence

Social Competence

The students are able to discuss in small groups and develop an approach.


Students are able to define independently tasks, to get new knowledge from existing knowledge as well as to find ways to use the knowledge in practice.

ECTS-Credit Points Module:



Written exam

Workload in Hours:

Independent Study Time: 124, Study Time in Lecture: 56

Course: Air Conditioning


Gerhard Schmitz




Summer Semester


1. Overview

1.1 Kinds of air conditioning systems

1.2 Ventilating

1.3 Function of an air condition system

2. Thermodynamic processes

2.1 Psychrometric chart

2.2 Mixer preheater, heater

2.3 Cooler

2.4 Humidifier

2.5 Air conditioning process in a Psychrometric chart

2.6 Desiccant assisted air conditioning

3. Calculation of heating and cooling loads

3.1 Heating loads

3.2 Cooling loads

3.3 Calculation of inner cooling load

3.4 Calculation of outer cooling load

4. Ventilating systems

4.1 Fresh air demand

4.2 Air flow in rooms

4.3 Calculation of duct systems

4.4 Fans

4.5 Filters

5. Refrigeration systems

5.1. compression chillers

5.2Absorption chillers


  • Schmitz, G.: Klimaanlagen, Skript zur Vorlesung
  • VDI Wärmeatlas, 11. Auflage, Springer Verlag, Düsseldorf 2013
  • Herwig, H.; Moschallski, A.: Wärmeübertragung, Vieweg+Teubner Verlag, Wiesbaden 2009
  • Recknagel, H.;  Sprenger, E.; Schrammek, E.-R.: Taschenbuch für Heizung- und Klimatechnik 2013/2014, 76. Auflage, Deutscher Industrieverlag, 2013