An apparatus and a method are provided. Use is made of a wick structure configured to receive a liquid and generate vapor in when such wick structure is heated by heat transferred from heat sources to be cooled off. A vapor channel is provided configured to receive the vapor generated and direct said vapor away from the wick structure. In some embodiments, heat conductors are used to transfer the heat from the heat sources to the liquid in the wick structure.
STATEMENT OF GOVERNMENT INTEREST IN THE INVENTION
 The present application was made with government support under Department of Energy Grant No. DE-EE0002B95. The United States government may have certain rights in the invention.