Ventilation and air-conditioning system

A ventilation and air-conditioning system for a room, the room containing a heat source and the ventilation and air-conditioning system, comprising:

• a cooling air supply system;
• at least one enclosure;
• an inlet located at an upper end of the enclosure;
• an outlet configured to lead into the room;
• and
• heat storage elements arranged within the enclosure between the inlet and the outlet;
• and
• a supply air duct system connected to the cooling air supply system, the ventilation and air-conditioning system being configured such that:
• during operation of the cooling air supply system, there is a forced flow of cooled air from the cooling air supply system through the supply air duct system and then through the enclosure from the inlet to the outlet, thereby cooling and preferably freezing the heat storage elements, and
• when the operation of the cooling air supply system fails, a natural convection air flow occurs through the enclosure from the inlet to the outlet, the natural convection air flow being cooled by transfer of heat to the heat storage elements;
• the supply air duct system being arranged above the inlet at a distance from the inlet, a gap being defined between the supply air duct system and the inlet,
• the inlet of the enclosure being adapted to be in constant flow connection with the room by air flowing from the room through the gap into the inlet of the enclosure.