Project

  • Almaza City Center

  • Customer name: Grundfos Egypt – CCC & HAC contractors

  • Date of commissioning: July 2019

mall
cooling
pressure maintenance

Performance parameter

  • Output: Chiller plant 36 MW, ETS1 10.2 MW, ETS2 6.8 MW, ETS3 7.1 MW, ETS4 6.7 MW

  • System pressure: 5 bar

  • Temperature: 6–12°C

  • System volume: Cooling unit 576 m3, ETS1 163 m3, ETS2 109m3, ETS3 114m3, ETS4 107 m3  

Task

  • Supplying HVAC items for the cooling circuit

  • Due to the system size a special pressurisation system was required

Product solution

Dynamic pressurisation

  • 4x Variomat Giga control unit GS1.1

  • 4x Variomat Giga hydraulic unit GH 50

  • 3x Variomat Giga primary vessels GG2000

  • 1x Variomat Giga primary vessel GG3000

  • 1x Variomat Giga control unit GS 3

  • 1x Variomat Giga hydraulic unit GH 90

  • 1x Variomat Giga primary vessel GG4000

  • 1x Variomat Giga secondary vessel GF4000 

Air and dirt separation

  • 10x Exvoid air separators High Cap A350 HC

  • 1x Exvoid air separator High Cap A500 HC

Expansion vessels

  • 8x Reflex expansion vessels DE 1000/16 bar

  • 1x Reflex expansion vessel DE 3000/16 bar

Achieved goals

  • The high performance Variomat Giga ensures reliable pressurisation

  • The Exvoid air separators remove circulating free air and gas bubbles from the system and thus prevent noise, corrosion and performance degradation due to formation of larger air inclusions.

Reference overview