20.500.12556/RUL-124125 Performance and exergy analyses of a solar assisted heat pump with seasonal heat storage and grey water heat recovery unit The main research objective of this paper was to compare exergy performance of three different heat pump (HP)-based systems and one natural gas (NG)-based system for the production of heating and cooling energy in a single-house dwelling. The study considered systems based on: 1. A NG and auxiliary cooling unit; 2. Solely HP, 3. HP with additional seasonal heat storage (SHS) and a solar thermal collector (STC); 4. HP with SHS, a STC and a grey water (GW) recovery unit. The assessment of exergy efficiencies for each case was based on the transient systems simulation program TRNSYS, which was used for the simulation of energy use for space heating and cooling of the building, sanitary hot water production, and the thermal response of the seasonal heat storage and solar thermal system. The results show that an enormous waste of exergy is observed by the system based on an NG boiler (with annual overall exergy efficiency of 0.11) in comparison to the most efficient systems, based on HP water–water with a seasonal heat storage and solar thermal collector with the efficiency of 0.47. The same system with an added GW unit exhibits lower water temperatures, resulting in the exergy efficiency of 0.43. The other three systems, based on air–, water–, and ground–water HPs, showsignificantly lower annual source water temperatures (10.9, 11.0, 11.0, respectively) compared to systems with SHS and SHS + GW, with temperatures of 28.8 and 19.3 K, respectively. exergy efficiency grey water heat recovery unit seasonal heat storage solar-assisted heat pump eksergijski izkoristek naprava za rekuperacijo toplote sive vode sezonski hranilnik toplote solarna toplotna črpalka true false true Angleški jezik Slovenski jezik Članek v reviji 2021-01-04 14:30:02 2021-01-04 14:30:07 2022-09-04 03:57:50 0000-00-00 00:00:00 2021 0 0 17 str. iss. 1, art. 47 Vol. 23 Jan. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.577:519.6(045) 1099-4300 10.3390/e23010047 45184771 RAZ_Poredos_Primoz_2021.pdf RAZ_Poredos_Primoz_2021.pdf 1 A983A23526C663AA3A2FAB20EFB3D319 e96758b79a16fddc909a935a091e1dea21ec59957cc126699c4059772fda55e8 c9baaccf-8d95-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=153748 https://www.mdpi.com/1099-4300/23/1/47 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139518 Fakulteta za strojništvo 0 0 0