Heating, ventilation and air conditioning of the trams

The thesis deals with the concepts of trams which are used for public transport in Prague and especially about solution of the ventilation system, heating and air conditioning. Here are described the most used principles of ventilation in the cab and in the passenger saloon. In the individual chapters, there are materials for design of air condition consequent from the standards and recommendations of the producers themselves. Air conditioning unit HVAC (Heating, ventilating and air conditioning) for the saloon passengers, including trams 15T cooling circuit is designed from these data. The unit is designed to fallen power required compared to the present. This is possible by the reversibility of the cooling circulation, which operates as a heat pump in the winter. In conclusion of thesis is stated measurements on existing air conditioning 15T. Measurements should verify that the unit has the necessary cooling performance. Design of HVAC unit and measurements are universal for any modern low-floor tram