Disclosed is a heat exchanger that includes a first, second, and third tube. The first tube may have a first cooling/heating medium inlet at a first end and a first cooling/heating medium outlet at a second end and the second tube is disposed about and concentric with the first tube. The second tube may have a fluid inlet on the same first end as the first tube and a fluid outlet on the same second end as the first tube. The third tube is disposed about and concentric with the second tube, and may have a second cooling/heating medium inlet on the same first end as the first tube and a second cooling/heating medium outlet on the same second end as the first tube. A clamping mechanism may be utilized to secure the tubes in their respective positions and allow the tubes to receive fluid and cooling/heating medium respectively.
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