Available in more than 20 models, brazed Plate Heat exchangers (BHE's) have stainless steel plates, copper brazed for high thermal efficiency and strength, Designed for refrigeration and AC duties, BHE's handle HCFC, HFC, HC and CO2 refrigerants. As dry expansion evaporator, they feature integrated flow equalization for maximum cooling performance. Three models are equipped with double refrigerant circuits. Temperature range - 100oC to 200oC; pressure in excess of 40 bar.
Benefits:
- Extremely compact, low weight, easy to install
- Low refrigerant charge
- Even flow distribution with stable superheat capability
- Safe oil Scatter, even with low loads
- Safe capacity control due to double refrigerant circuits
- Floating condensation temperature with flooded evaporations systems
- Can be optimized with air liquid coolers in indirect cooling systems.
Applications:
Indirect System:
- Water-glycol cooled condensers
- DX evaporators, single and double circuits
- Flooded evaporators
Indirect and direct System:
- Cascade evaporator/condensers
- Condensate coolers
- Desuperheater for heat recovery
- Oil coolers
Alfa Laval Fusion-bonded Plate Heat Exchanger:
Available in 5 sizes and various pressure levels. AlfaNova is a completely new type of plate heat exchanger, the world's first plate heat exchanger, made of 100% stainless steel. It is based on Alfa Laval's new revolutionary techonology. AlfaFusion, the art of joining stainless steel components together. AlfaNova heat exchanger are well suited in applications which put high demand on cleanliness, applications where e.g. Ammonia or LiBr are used or application where copper or nickel contamination is not accepted AlfaNova is made for high thermal efficiency and strength as well as good resistance, pressure and thermal fatigue, Temperature range: 50oC to 22oC; pressure in excess of 25 bar.
Benefits:
- Same benefits as the brazed heat exchangers with some additions e.g:
- 100% stainless steel construction ensures unbeatable durability
- High corrosion resistance
- Maximum hygiene
Applications:
Indirect and/or direct Systems Within Ammonia Refrigeration:
- Oil cooler
- Condenser
- Evaporator
- Economizer
- Desuperheater
- Absorption systems (LiBr)
Within Cooling:
- Process Cooling
- Hydraulic oil Cooling
- Laser cooling
- Hygienic/Sanitary demands
- Water/Water cooling
Alfa Laval Gasketed Heat Exchangers:
Designed to allow full optimization with the chiller, the Gasketed Plate Heat Exchanger (GPHE) range includes versions to cope with pure, corrosive, foulant and hygienic fluids in combination with chiller evaporators and condensers. Plate designs prevent fouling through even flow distribution, high turbulence and no stagnant areas. GPHE's are available in stainless steel, titanium and high nickel alloy materials. Operating pressure up to 25 bar, operating temperature up to 180oC; flow rates up to 3,000 m3/h.
Benefits:
- Compact, low weight
- Efficient with close temperature approach and small loss of chiller efficiency.
- Low fouling with raw water, no corrosion
- Easy to open with advanced bolt closing system
- Long-life, glue-free gaskets means easy on-site replacement
- Fatigue resistant
- No risk of inter leakage
Applications:
Indirect System:
- Intercoolers, isolating chiller condensers for corrosion and fouling resistance
- Intercoolers in free cooling or chiller bypass systems with air coolers, cooling towers ans sea, river or lake water as heat sink
- Interchangers in reversed AC/heat pump application
- District cooling distribution interchangers
- Pressure interceptors for tall building
Alfa Laval Semi-Welded Heat Exchangers:
The Semi-Welded Plate Heat Exchanger (SWPHE) is available in six models. The refrigerant flows in laser-welded, sealed plate channels and the brine in gasketed channels. The flexible design copes with fatigue stresses and ice formation. The SWPHE handles most refrigerants on the welded side and is particularly suitable for ammonia duties. Standard plate materials are stainless steels and titanium. Temperature range - 45oC to 130oC; pressure upto 25 bar.
Benefits:
- Low charge, low weight
- Easy to modify heat transfer area for altered capacities, refrigerants
- Easy inspection and cleaning of the liquid side.
- Reliable, with long service life for heavy duties
- Plate materials for corrosive fluids, cooling water and brines
- Condender/desuperheater or condenser/oil cooler combined in single unit
- Floating condensation with flooded evaporation
- Can be optimized with air liquid coolers in indirect cooling systems
Applications:
Indirect systems:
- Water-glycol cooled condenser
- DX evaporators, single and double circuits
- Flooded evaporators
Indirect and direct Systems:
- Desuperheater for heat recovery
- Water-cooled oil coolers
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