Number   Description Supplier 2 Compressors Bitzer, 4T-8.2P   1 Air-cooled condenser ECO FCE 071C63 1 Plate heat exchanger Propane/glycol: 21 kW, Swep, B25x70 1 Plate heat exchanger Propane/CO2: 10 kW, Swep V27x80 HP   1 Plate heat exchanger Propane/propane: 2 kW, Swep, B12x70 1 Plate heat exchanger Propane/glycol 3 kW, Swep B27x50 1 Electric expansion valve Danfoss ETRE – 30 kW 1 Electric expansion valve Siemens Staefa – 14 kW Table 3: Important/main components for propane system