Abstract: The present invention relates to a heat exchanger (1) comprising a bundle of tubes (2) arranged parallel to one another and inside of which a first heat transfer fluid is intended to circulate, a second fluid being intended to pass through the bundle of tubes (2) between said tubes (2), said bundle of tubes (2) comprising spacers (6) which are disposed between said tubes (2), said spacers (6) having corrugations (60) extending in the longitudinal direction of the tubes (2), said corrugations (60) having ridges (61) in contact with said tubes (2) and sidewalls (62) connecting said ridges (61), the spacers (6) comprising a first portion (6A) and a second portion (6B), the first portion (6A) being arranged upstream of the second portion (6B) in the direction of flow of the second heat transfer fluid, wherein the first portion (6A) protrudes from the front edge of the tubes (2), the ridges (61) of the first portion (6A) having a profile having a flat (64) and the ridges (61) of the second portion (6B) having a ro

Abstract: The invention relates to a heat exchanger (1) comprising a bundle of tubes (2) arranged parallel to one another and inside of which a first heat transfer fluid is intended to circulate, wherein a second fluid is intended to pass through the bundle of tubes (2) between said tubes (2), said bundle of tubes (2) comprising spacers (6) which are arranged between said tubes (2), said spacers (6) having corrugations (60) extending in the longitudinal direction of the tubes (2), said corrugations (60) having ridges (61) in contact with said tubes (2) and sidewalls (62) connecting said ridges (61), the spacers (6) comprising a first portion (6A) and a second portion (6B), the first portion (6A) being disposed upstream of the second portion (6B) in the direction of passage of the second heat transfer fluid, the first (6A) and second (6B) portions being made from two distinct parts of different shapes.

Abstract: A refrigeration system is provided including a refrigeration circuit and a free cooling system. The free cooling system includes a fluid cooling circuit and a free cooling circuit. The fluid cooling circuit is thermally and hydraulically coupled to the refrigeration circuit such that that a cooling fluid of the fluid cooling circuit is configured to transfer heat to the refrigerant. The free cooling circuit is thermally and hydraulically coupled to the refrigeration circuit such that a free cooling fluid of the free cooling circuit is configured to absorb heat from the refrigerant. The free cooling circuit and the fluid cooling circuit are thermally and hydraulically coupled through a free cooling heat exchanger. At least one valve is configured to control a flow within the free cooling circuit. The refrigeration system is operable in a free cooling mode, a mechanical cooling mode, and a combined free cooling and mechanical cooling mode.

Abstract: A refrigeration system is provided including a refrigeration circuit and a free cooling system. The free cooling system includes a fluid cooling circuit and a free cooling circuit. The fluid cooling circuit is thermally and hydraulically coupled to the refrigeration circuit such that that a cooling fluid of the fluid cooling circuit is configured to transfer heat to the refrigerant. The free cooling circuit is thermally and hydraulically coupled to the refrigeration circuit such that a free cooling fluid of the free cooling circuit is configured to absorb heat from the refrigerant. The free cooling circuit and the fluid cooling circuit are thermally and hydraulically coupled through a free cooling heat exchanger. At least one valve is configured to control a flow within the free cooling circuit. The refrigeration system is operable in a free cooling mode, a mechanical cooling mode, and a combined free cooling and mechanical cooling mode.