Abstract: A cooler system has at least first and second coolers which are arranged in series, at least a third cooler which is arranged in parallel with the first and second coolers, and at least one flow control device for directing a fluid flow through at least one of the coolers. At least one of the coolers includes a bypass circuit or a recirculation loop for the fluid flow.

Abstract: A cooler system having an inlet (A) and an outlet (B), the cooler system comprising; at least a first cooler (20, 21, 22, 23, 24) and a second cooler (20, 21, 22, 23, 24), wherein the first cooler (20, 21, 22, 23, 24) and second cooler (20, 21, 22, 23, 24) are arranged in a series connection, the cooler system further comprises at least a third cooler (20, 21, 22, 23, 24) which is arranged in parallel connection with the first cooler (20, 21, 22, 23, 24) and second cooler (20, 21, 22, 23, 24), and the cooler system comprises at least one flow control device for directing flow through at least one cooler (20, 21, 22, 23, 24) wherein at least one of the coolers (20, 21, 22, 23, 24) comprises a bypass circuit and/or recirculation loop (35).