Refrigerant mass charge distribution in a domestic refrigerator. Part I: Transient conditions
2006 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 26, no 8-9, 829-837 p.Article in journal (Refereed) Published
Experimental results are presented of the refrigerant mass charge distribution in a steadily cycling domestic refrigerator. In detail it is shown how the charge is displaced at compressor start-up and shut-down. At start-Lip it was found that the charge was temporarily displaced towards the condenser before returning to a steady state distribution in the latter part of the on-period. As a result, initially the evaporator was starved with a lowered evaporation temperature and a peak 10 degrees C superheat. The superheat disappeared within 3 min as the evaporator was gradually refilled with refrigerant. At shut-down the pressure equalised within 3 min as refrigerant was pushed into the evaporator from the condenser. The losses due to charge displacements were estimated to 11% (capacity) and 9% (efficiency). Possible ways to reduce the losses are discussed.
Place, publisher, year, edition, pages
2006. Vol. 26, no 8-9, 829-837 p.
domestic refrigerator, charge inventory, capillary tube, dynamic simulation, cycling losses, system, freezer
IdentifiersURN: urn:nbn:se:kth:diva-15551DOI: 10.1016/j.applthermaleng.2005.10.003ISI: 000236308200007ScopusID: 2-s2.0-29244464681OAI: oai:DiVA.org:kth-15551DiVA: diva2:333592
QC 201005252010-08-052010-08-052012-04-11Bibliographically approved