Presents a newly developed computer program for predicting the dynamic performance of heat pumps using an alternative pure refrigerant. Predicts the dynamic behaviour of water/water and water/air heat pumps using the alternative refrigerant R134a, and compares the behaviour with that of R12.

KEYWORDS: Refrigerants, heat pumps, computer programs, calculating, models, performance, water water heat pumps, water air heat pumps, R134a, R12