Abstract: A heat exchanger comprising at least one fluid tube configured to extend substantially orthogonally to a wind direction, the fluid tube having a first wall and a second wall, and the fluid tube comprising: a first tube section and a second tube section each extending along the fluid tube, arranged such that each tube section is in fluid communication with a pair of manifolds and configured to contain a cooling fluid, wherein the first tube section is formed by the first wall, the second wall, a first outer wall and a first inner wall and the second tube section is formed by the first wall, the second wall, a second outer wall and a second inner wall, the first inner wall, the second inner wall, the first outer wall and the second outer wall extending substantially parallel along the fluid tube in fluid-tight contact with the first wall and the second wall, wherein the heat exchanger is configured to lead the cooling fluid in a first direction in the first tube section and in a second direction in the second t

Abstract: The present invention relates to a wind turbine cooling system configured to cool components of a wind turbine, the wind turbine having a nacelle, comprising a cooling medium configured to be circulated in a cooling circuit, the cooling circuit is fluidly connecting the components and a cooling device, the cooling device is arranged on an exterior face of the nacelle and is exposed to ambient conditions, such as wind flow and ambient air temperature outside the nacelle, the cooling medium is cooled in the cooling device by wind flow passing through the cooling device, the cooling medium is circulated from the cooling device to the components, wherein a first temperature altering section is fluidly connected with the cooling circuit upstream of the cooling device, the first temperature altering section being configured to heat the cooling medium before entering into the cooling device, and a second temperature altering section is fluidly connected with the cooling circuit downstream of the cooling device, the

Abstract: A heat exchanger comprising at least one fluid tube configured to extend substantially orthogonally to a wind direction, the fluid tube having a first wall and a second wall, and the fluid tube comprising: a first tube section and a second tube section each extending along the fluid tube, arranged such that each tube section is in fluid communication with a pair of manifolds and configured to contain a cooling fluid, wherein the first tube section is formed by the first wall, the second wall, a first outer wall and a first inner wall and the second tube section is formed by the first wall, the second wall, a second outer wall and a second inner wall, the first inner wall, the second inner wall, the first outer wall and the second outer wall extending substantially parallel along the fluid tube in fluid-tight contact with the first wall and the second wall, wherein the heat exchanger is configured to lead the cooling fluid in a first direction in the first tube section and in a second direction in the second t