Electrocaloric cooling

ǂthe ǂimportance of electric-energy recovery and heat regeneration

Uroš Plaznik (Avtor), Marko Vrabelj (Avtor), Zdravko Kutnjak (Avtor), Barbara Malič (Avtor), Alojz Poredoš (Avtor), Andrej Kitanovski (Avtor)

Povzetek

Here we explore the effect of electric-energy recovery and heat regeneration on the energy efficiency of an electrocaloric-cooling system. Furthermore, the influence of the polarizationelectric field hysteresis on the energy efficiency of the system is analysed. For the purposes of the analysis, the properties of (1 % x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-100xPT) with x = 0, x = 0.1, and x = 0.35 are characterized. We show that if no heat is regenerated, even small irreversibilities in the electric circuit used to recover the electric energy can cause a significant drop in the achievable energy efficiency. On the other hand, when a heat regeneration process is considered and a realistic value for the degree of electric-energy recovery equal to 80% is assumed, the limit for the energy efficiency of a system employing PMN ceramics is estimated to be equal to 81% of the efficiency of a Carnot heat pump.

Ključne besede

heat regeneration;electrocaloric cooling;electric-energy recovery;energy analysis;

Podatki

Jezik:	Angleški jezik
Leto izida:	2015
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FS - Fakulteta za strojništvo
UDK:	621.5:620.9(045)
COBISS:	14221083
ISSN:	0295-5075
Št. ogledov:	345
Št. prenosov:	134
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	elektrokalorično hlajenje;regeneracija toplote;regeneracija električne energije;energijska analiza;
Vrsta dela (COBISS):	Članek v reviji
Konec prepovedi (OpenAIRE):	2016-09-28
Strani:	str. 57009-1-57009-6
Letnik:	ǂVol. ǂ111
Zvezek:	ǂnr. ǂ5
Čas izdaje:	2015
DOI:	10.1209/0295-5075/111/57009
ID:	12797285