Refrigeration

Vahterus Plate & Shell Heat Exchangers (PSHE) have many benefits for advanced refrigeration applications such as evaporators, condensers, cascades, desuperheaters and oil coolers. PSHE are effective, durable and versatile due to their unique shell construction, together with fully welded plates. This makes PSHE ideal, also for contractors who need compact size and low refrigerant charge. Vahterus Heat Exchangers are suitable for all refrigerants, especially natural media such as ammonia and carbon dioxide.

With the physical capability and capacity of 2000 m² of heat transfer area per exchanger, and the potential to utilise PSHE with design pressures up to 200 bar(g), Vahterus are able to fulfil almost all heat transfer requirements in Refrigeration applications. Operation of PSHE, based on their unique and fully welded construction, is achievable over a wide temperature (-200 to 900 Cº) and capacity range (up to 20 000 kW/exchanger).

Evaporators

The versatility of Vahterus PSHE is demonstrated particularly in evaporator applications. PSHE can be used as highly efficient Flooded, or Direct Expansion (DX) evaporators, due to low pressure drop and high heat transfer. Fully welded circular plates and a protective outer shell, guarantees safety for the end user. This construction also ensures high integrity and durability.

Flooded Evaporators

• Refrigerants: NH3, CO2, R404, R134a, propane, methane, etc.
• Capacity Range: 5 - 20 000 kW
• Compact Size & Small Refrigerant Charge
• Low Evaporative Side Pressure Drop
• Flexible Construction
• High Efficiency
• Safe Operation

Direct Expansion (DX) Evaporators

• Capacity Range: 5 - 1500 kW
• Can Be Used For All Refrigerants
• Compact Size
• Safe Operation

Cascades

Cascade heat exchangers are used to transfer heat between two refrigerants. They are used especially with CO2. A cascade unit combines both condenser and evaporator (flooded or DX). Vahterus PSHE are ideal for cascade operations, based on their high thermal efficiency. They can provide minimum temperature difference between the evaporative and condensing media, and low running costs. Using Vahterus fully welded construction ensures there is no leakage or cross-contamination.

• Refrigerants: NH3, CO2, R404, R134a, propane, methane, etc.
• Capacity Range: 5 - 10 000 kW
• Compact Size & Small Refrigerant Charge
• High Heat Transfer
• Low Pressure Drop
• Many Materials Available
• Easy to Install and Insulate

Vahterus Systems, Flooded Evaporators + Droplet Separators

• Capacity Range: 100 - 5 000 kW
• Compact Size & Small Refrigerant Charge
• Possibility for Internal and External Circulation
  Systems
• Flexible and Customised Construction
• Safe Operation
• Ready to be Installed

Combined

Combined is a new, extremely compact solution for flooded evaporators and flooded cascades. The evaporator, or cascade, and surge drum are all in one shell. Combined is especially suitable for limited spaces, such as marine applications or production facilities with very limited height. In addition to the compact size, it creates cost savings with insulation, piping and amount of refrigerant needed.

• Flooded Evaporators + Separator
• Flooded Cascade + Separator
• Multi Pass Droplet Separation
• 50 - 2000 kW
• Small Refrigerant Charge
• Round Plate

Condensers

The construction of Vahterus PSHE is ideal for condensing applications. Key benefits include high thermal efficiency, small/reduced refrigerant charge, and low pressure drop. PSHE are suitable for all refrigerants over a wide temperature and capacity range.   

• Refrigerants: NH3, CO2, R404, R134a, propane, methane, etc.
• Capacity Range: 5 - 10 000 kW
• Compact Size & Small Refrigerant Charge
• High Heat Transfer
• Low Pressure Drop
• Many Materials Available