High-temperature steam is in great demand for many industrial applications. The electric boilers used to replace traditional boilers in rural areas are not efficient enough to be employed in large-scale steam production. Furthermore

a large amount of heat appears to be wasted in related industries

so the employment of high-temperature heat pumps is quite promising in producing high-temperature steam. In this paper

an R245fa high-temperature heat pump system is applied to the production of steam. A mathematical model is developed to predict the performance of each component and the heat pump system

and an experimental investigation is also conducted. The results illustrate that

with an increase in evaporation temperature

the coefficient of performance (COP) and heat capacity increase

whereas the discharge temperature decreases. The relative COP ranges from 0.55 to 1.3 in the target operating conditions. The heat exchange efficiency is observed to increase from 1.7 to a maximum of 2.8 kW/(m2?K) as the water flow rate increases.