Experimental investigation of compact silicon carbide heat exchangers for high temperatures

摘要

The results of experimental investigations of novel ceramic high-temperature heat exchangers (HTHE)udand its main characteristics such as effectiveness and power load as a function of mass flow and theudgeometry of the channels are presented. Firstly, some information on the background and the manufacturingudof the HTHE, which is based on honey comb structures made out of extruded silicon carbide, isudgiven. The experimental tests have been carried out with air as a heat transfer medium at temperaturesudof up to 1000 �C. The experimental set-up is described in detail. The acquired characteristic temperatureudand effectiveness data for different inlet temperatures and mass flows are discussed. They have beenudcompared with data from theoretical calculations as well as with characteristic data of typical counterudflow heat exchangers. Additionally, thermal shock tests have been carried out for a qualitative testingudof the mechanical strength. Finally, a conclusion and an outlook on further activities are given.