Shell&Tube Condensers are used in industrial and comfort cooling units. G-RKMDEW and G-RKDEW series Shell&Tube Condensers are manufactured in order to provide low pres- sure loss and high efficiency starting from a cooling capacity of 20 kW up to a capacity of 1680 kW under standard working conditions. G-RKDEW series Shell&Tube condensers are used in cooling applications where city water and storage water are used while G-RKMDEW series Shell&Tube condensers are used in cooling applications with sea water.
DESIGN AND MATERIAL
Shell&Tube Condensers are designed in order to minimize performance decreasing factors such as vibration and corro- sion. G-RKMDEW series Shell&Tube condensers are designed and manufactured as resistant to corrosive effects of sea water. Materials used in Shell&Tube Condensers are selected according to “European Pressure Vessel Codes”. Materials used in shell&tube type evaporators are chosen in complience with “European Pressure Vessel Codes”
RKDEW Shell&Tube Condensers;
• Heat transfer pipes with a special geometry and inside and outside grooves enabling the heat transfer are made of copper
• Tube sheets and bodies are made of steel
• Head Covers are made of cast iron
• Bolts are made of steel alloy
• Gaskets are made of asbestos free materials that are com- patible with HCFC and HCF cooling gases.
QUALITY AND TEST
Mechanical calculations of GVN Shell&Tube Condensers are made in accordance with TS EN13445-3 standard and with a CE certificate in compliance with ISO 9001:2008 Quality Manage- ment System.
Shell&Tube Condensers are assessed through a nitrogen test with a gas side of 30 bars and a water side of 12 bars.
FOULING FACTOR
Fouling factor (f.f.) is important in selecting an evaporator. The fouling factor levels under certain conditions are given below.
• Closed-circuit mains water f.f.= 0.000043 m2K/W
• Open-circuit mains water f.f.= 0.000086 m2K/W
• Glycol solution < %40 f.f.= 0.000086 m2K/W
• Glycol solution > %40 f.f.= 0.000172 m2K/W