Heat exchanger for cooling multiple fluids

A heat exchanger comprising:

• a stack of nested shells extending in a stacking direction from a first end to a second end;
• a base plate arranged at the first end, the stack of nested shells being mounted to a first face of the base plate;
• a cap plate arranged at the second end and joined to the stack of nested shells;
• a first and a second coolant manifold extending through the stack of nested shells from the first end to the second end;
• a plurality of coolant flow passages formed between nested shells of the stack to fluidly connect the first and second coolant manifolds;
• a plurality of fluid flow passages formed between nested shells of the stack, the plurality of fluid flow passages being interleaved with the plurality of coolant flow passages;
• a first and a second fluid manifold extending through the stack of nested shells from the first end to an intermediate location between the first end and the second end along the stacking direction, the first and second fluid manifolds being fluidly connected by those ones of the fluid flow passages that are located between the first end and the intermediate location, the first and second fluid manifolds additionally extending through the base plate from the first face to a second face of the base plate opposite the first face;
• a third and a fourth fluid manifold extending through the stack of nested shells from the second end to the intermediate location, the third and fourth fluid manifolds being fluidly connected by those ones of the fluid flow passages that are located between the second end and the intermediate location;
• and
• a first and a second fluid transfer conduit extending from the second face to the third and fourth fluid manifolds respectively, each of the first and second fluid transfer conduits including a first section extending in the stacking direction through the stack of nested shells, and a second section formed into the cap plate.