首页|Combined effects of refrigerant leakages and fouling on air-source heat pump performances in cooling mode
Combined effects of refrigerant leakages and fouling on air-source heat pump performances in cooling mode
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
Elsevier
For electric heat pump systems (EHP), soft faults such as refrigerant leakages and heat exchangers fouling can lead to significant performance degradations, which can remain unidentified for a long period. This paper, through a digital model, wants to simulate the cooling season behavior of a case study air-source heat pump for residential air-conditioning, analyzing the performance degradation in case of both standalone and simultaneous occurrence of soft faults. The study is carried-out in different scenarios of not planned and ordinary maintenance of the machine and in typical climate conditions of Naples, Miami and Shanghai. The impact of faults on seasonal performances (SCOP) and total equivalent warming impact (TEWI) has also been analyzed. Results show that refrigerant leakages can have an impact on system performance higher than 25%, whereas heat exchangers fouling can downgrade the efficiency of approximately 15%. It is also found that, for each climate condition, a different maintenance strategy can halve the cases with SCOP penalization higher than 10%. Since faults have not the same probability of occurrence, a smart monitoring and a fault detection system can be the solution to guarantee good performances avoiding at the same time excessive maintenance costs.
Air-source heat pumpFault detection and diagnosisHeat exchanger foulingMaintenanceRefrigerant leakage
Pelella F.、Viscito L.、Mauro A.W.
展开 >
Department of Industrial Engineering Università degli studi di Napoli – Federico II
NSTL
Elsevier
