6 Politekhnichna Street
Building 5, floor 8, room 801
CPOTE 2026 detailed schedule: presentation CPOTE-6040-A, 25 September.
The 9th International Conference on Contemporary Problems of Thermal Engineering, CPOTE 2026, took place in Poland on 23–25 September 2026. AEP professor Volodymyr Voloshchuk presented the paper Exergy-based diagnosis of malfunctioning components in heat pump at off-design conditions in a parallel session.
As a heat pump operates, its electricity consumption may rise. Under changing operating conditions, however, it can be difficult to identify which component is responsible. The researchers used advanced exergy analysis to isolate the effect of an individual component from its interactions with the rest of the system.
A case study of a building-heating heat pump showed that evaporator-surface fouling had the greatest impact on the loss of energy efficiency. For the system studied, the authors calculated that cleaning the evaporator and condenser heat exchangers before the heating season could reduce electricity consumption by 3–8% over the heating season.
The research was carried out within the project “Decarbonisation of the construction sector and energy supply systems using digital twin technology” (state registration No. 0125U001437).