We develop a new algorithm Surrogate Optimization with Partial Restart Initiation (SOPRI) for unconstrained surrogate-based optimization of high-dimensional expensive black-box functions that employs new restart strategies, based on the DYCORS algorithm. In prior work, the search method restarts...

A ternary mixture of R124/R142b/R600a, named HTR01, for moderately high temperature heat pumps, was developed. Tests of material compatibility and oil miscibility showed that the mixture could be used with a R22 compressor in an HTR01 heat-pump system. A 2.92 kW moderately high temperature water...