Great Mosque - Algiers

The area stretches over 900m along the highway of Algiers. An energy center is mounted which is able to produce a cooling amount of 12MW, a heating amount of 4MW, and 4,6MW power. An overall power system of 8,5MW is installed.


Client / Building Owner Nationale Agentur der Realisierung und Leitung von Djamaâ El Djazair – ANARGEMA / Krebs und Kiefer International GmbH & Co
Architect KSP Jürgen Engel Architekten Herr Oster/ Mr. Schöll
Time of performance / construction period 2008 – 2011, 2011-2016 (current project)
Asset groups Heating, Cooling Technology, Ventilation, AC, Sanitary Facilities, Electro-technics, Smoke Extraction, Sprinkler System, Measurement and Control Technology/BMS, Security Technology
Phases of Construction LP 2-3, LP 5-7, a part of LP8
GFA 400.000m²
Project Details

The area will house the following buildings:


  • a prayer hall of 22.500 m²
  • a commercial building (that also houses technical installation) of 15.000 m²
  • a minaret reaching a height of 250m in which offices and a museum are housed
  • a cultural center with concert hall with 1.500 seats
  • a library of 4.500 m²
  • Quran school for 500 students and multiple buildings in which offices and security systems are housed


The building is supplied with heat, coldness, and power by natural gas which is relatively affordable. Furthermore, a combined heat and power plant, a boiler, an absorption refrigerator using hot water and gas, a vapor-compression refrigeration, and a cooling tower (with a combined dry/wet cooling system) are connected to the system. Most of the times, the CHP-plant is responsible for the mosque’s power supply. Waste heat is used to heat the building and to feed the absorption refrigerator with hot water. The waste heat coming from the CHP plant and the independent production of its own current guarantees the building’s power supply throughout the whole year.

The CHP-plant is run with heat. The additional boiler is installed for back-up and safety reasons and guarantees the heat supply of the absorption refrigerator. They satisfy cooling loads. The absorption refrigerator using gas is used for average loads, and for balancing the cooling loads between basic and average loads, as well as for maximum loads.

Cooling towers release the waste heat coming from cooling systems. Due to the fact that the absorption refrigerator requires low temperatures, heat exchangers need to be run in a wet system during high and damp outside temperatures; they can be run in a dry system during low outside temperatures and low loads (without an evaporation process). The cooling process of the CHP-plant requires low temperatures and is managed by a cooling water system. Additionally, the use of solar energy, and of rain water for irrigation, and a system using grey-water for sanitary facilities is planned.