Electrocaloric cooling

ǂthe ǂimportance of electric-energy recovery and heat regeneration

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

Abstract

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.

Keywords

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

Data

Language:	English
Year of publishing:	2015
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	621.5:620.9(045)
COBISS:	14221083
ISSN:	0295-5075
Views:	345
Downloads:	134
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	elektrokalorično hlajenje;regeneracija toplote;regeneracija električne energije;energijska analiza;
Type (COBISS):	Article
Embargo end date (OpenAIRE):	2016-09-28
Pages:	str. 57009-1-57009-6
Volume:	ǂVol. ǂ111
Issue:	ǂnr. ǂ5
Chronology:	2015
DOI:	10.1209/0295-5075/111/57009
ID:	12797285