Improving the performance of rotating heat exchangers

It is shown experimentally and numerically that the performance of rotating heat exchangers can be improved by using an isothermal framework. Thus, a more uniform temperature field is obtained by using an isothermal copper framework instead of a steel one than by increasing the cross-section of the steel framework. In addition to reducing thermal stresses under steady and transient condition, the use of an isothermal framework simplifies the design of seals and increases their reliability. Nickel plating can be used to protect the copper framework against corrosion.