Efficient control of automotive R744 heat pump using Nelder-Mead simplex method

This paper deals with coefficient of performance (COP) maximization of automotive R744 heat pump using Nelder-Mead simplex method. The COP maximum is searched using high-side pressure adjustment, what is possible and necessary during transcritical operation. Selected approach allows efficient heat pump operation, fast COP maximum localization, minimum number of needed actuator changes and resistance to heat pump parameters variation.