Heat exchanger with surface-treated substrate

摘要

An organic rankine cycle system (10) for recovering and utilizing waste heat from a waste heat source by using a closed circuit of a working fluid (14) is provided. The organic rankine cycle system (10) includes at least one evaporator (12). The evaporator (12) further includes a surface-treated substrate (32) for promoting nucleate boiling of the working fluid (14) thereby limiting the temperature of the working fluid (14) below a predetermined temperature. The evaporator (12) is further configured to vaporize the working fluid (14) by utilizing the waste heat from the waste heat source.