01 June 2013
This article, the first of two, gives an overview on past and current activities to analyse and reduce refrigerant
charge in heat pumps. It focusses on the increasing awareness on effects of charge variations and how charge
reduction activities have started. In the second half of the article a short survey on commonly applied experimental
techniques to investigate charge inventory and a review on some current activities for charge distribution are
presented. Part 2 is planned for the next issue of the HPC Newsletter.