Guest Editorial: Special issue on the 8th Heat Powered Cycles Conference 2018

The 8th Heat Powered Cycles Conference (HPC) was hosted by the University of Bayreuth, Germany, between 16 and 19 of September 2018. The Conference has gained important attention, both by academia and industry, as this event has constantly attracted high quality contributions with considerable impact in the development of the related technologies. Since the subject related to energy and how to better design thermodynamic cycles with higher efficiency is a constant issue pursued by researchers worldwide, the HPC Conference has been an important event to present and discuss subjects like this, along with new working fluids and applications, as well as new technologies for heat exchangers and nanofluids. From a total of 120 submissions to the HPC Conference, 85 papers were selected to be part of its proceedings. From that, 15 papers were invited to be part of this Special Issue, which has received 10 submissions and a total of 8 papers have been selected for publication. The focus on the selection of the papers presented in the Special Issue is to ensure high quality of contributions that will certainly cause an important impact in future developments and research. All papers presented in the Heat Powered Cycles Conference in 2018 presented high quality contributions, with important discussions among every participant, which will help increasing the quality of future submissions in the next event.