EP 4063762 A1 20220928 - CASCADED HEAT PUMP SYSTEM WITH LOW GWP REFRIGERANT
Title (en)
CASCADED HEAT PUMP SYSTEM WITH LOW GWP REFRIGERANT
Title (de)
KASKADIERTES WÄRMEPUMPENSYSTEM MIT KÄLTEMITTEL MIT NIEDRIGEM GWP-WERT
Title (fr)
SYSTÈME DE POMPE À CHALEUR EN CASCADE À REFRIGÉRANT À FAIBLE EFFET DE SERRE
Publication
Application
Priority
EP 21165289 A 20210326
Abstract (en)
The invention relates to a system (1) for heating or cooling a space and for providing hot water, with a first refrigerant circuit (2) for heating or cooling a space using a first heat transfer fluid, comprising a compressor device (C1), a first heat exchanger device (H1), a second heat exchanger device (H2), and an expansion device, where the first heat exchanger device (H1) is configured for transferring heat to or from the space which is to be heated or cooled, respectively, via the first heat transfer fluid, and the second heat exchanger device (H2) is configured for transferring heat from the first heat transfer fluid to a second heat transfer fluid; and with a second refrigerant circuit (5) for providing hot water using the second heat transfer fluid, comprising a compressor device (C2), the second heat exchanger device (H2), a third heat exchanger device (H3), and an expansion device, where the third heat exchanger device (H3) is configured for transferring heat from the second heat transfer fluid to water which is to be provided as hot water; wherein at least the first heat transfer fluid has a net global warming potential for 100 years, GWP100, which is below 500, and first and second heat transfer fluid are chosen such that respective values of at least one characteristic of first and second heat transfer fluid make the second heat transfer fluid more suitable for higher working temperatures than the first heat transfer fluid so as to maximize the coefficient of performance, COP.
IPC 8 full level
F25B 7/00 (2006.01)
CPC (source: EP)
F25B 7/00 (2013.01); F25B 13/00 (2013.01); F25B 2313/003 (2013.01); F25B 2339/042 (2013.01); F25B 2339/047 (2013.01)
Citation (applicant)
- WO 2015147338 A1 20151001 - PANASONIC HEALTHCARE HOLDINGS CO LTD [JP]
- US 2016138837 A1 20160519 - GROMOLL BERND [DE], et al
- US 2011094259 A1 20110428 - LIFSON ALEXANDER [US], et al
- JP 2019504985 A 20190221
- US 2011289953 A1 20111201 - ALSTON GERALD ALLEN [US]
- US 2016363354 A1 20161215 - ITO DAISUKE [JP], et al
Citation (search report)
- [XAYI] EP 2787304 A1 20141008 - HITACHI LTD [JP]
- [Y] US 2497450 A 19500214 - ERNEST GYGAX
- [Y] JP H04263758 A 19920918 - KANSAI ELECTRIC POWER CO, et al
- [Y] SUN ZHILI ET AL: "Energy and exergy analysis of low GWP refrigerants in cascade refrigeration system", ENERGY, vol. 170, 11 December 2018 (2018-12-11), pages 1170 - 1180, XP085606507, ISSN: 0360-5442, DOI: 10.1016/J.ENERGY.2018.12.055
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 21165289 A 20210326