New S727 dual circuit evaporator

Created: 28 March 2022

New S727 dual circuit evaporator

The new Onda Brazed Plate S727 is the larger plate in the BHE portfolio and it has been developed to respond to Air Conditioning and

Process Cooling applications with low pressure refrigerants as R1234ze, R515B, R513A and R134a.

The design of the plate corrugation pattern has been optimized thanks to a CFD analysis supported by thermal laboratory test.

New patented distribution system which allows to achieve stable performance with large plate package reaching a cooling capacity up to 700 kW .

Dewpoint?

The dewpoint is the temperature at which a vapour condenses, or when associated with glide, the higher or highest boiling point of the mixture.

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What does “Approach” mean in heat exchangers?

This term refers to the difference between the leaving process fluid temperature and the change of state temperature of the refrigerant. For evaporators, if water is cooled from 12°C to 6°C and evaporating temperature is 1°C, the approach is 5K. For condensers, if water is warmed from 30°C to 35°C and condensing temperature is 40°C, the approach is 5K.

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Which type of heat exchanger is more effective?

Plate exchanger is the most efficient due to turbulent flow on both sides. High heat-transfer coefficient and high turbulence due to even flow distribution are important.