h1

TY  - THES
AU  - Höges, Christoph
TI  - Kältemittelkreislaufkonfigurationen von Wärmepumpen für die Gebäudebeheizung; 1. Auflage
VL  - 146
PB  - Rheinisch-Westfälische Technische Hochschule Aachen
VL  - Dissertation
CY  - Aachen
M1  - RWTH-2025-07755
SN  - 978-3-948234-60-7
T2  - E.On Energy Research Center
SP  - XXI, 269 Seiten : Illustrationen
PY  - 2025
N1  - Druckausgabe: 2025. - Auch veröffentlicht auf dem Publikationsserver der RWTH Aachen University
N1  - Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2025
AB  - Heat pumps play a key role in reducing greenhouse gas emissions in the building sector. To minimize both the operating costs and the load on the electricity grids, the efficiency of heat pumps must be as high as possible over the entire operating range. However, the efficiency of heat pumps is influenced by many factors. The main influencing factors include the refrigerant, the components and the used refrigerant cycle. Therefore, this work analyzes the refrigerant, the refrigerant cycle and its components in dependency of the operating point to determine the refrigerant cycle configuration with the highest efficiency. For this purpose, simulation models and a heat pump test bench are developed to evaluate the refrigerant cycle configurations simulatively and experimentally. First, a preselection of refrigerants available on the market is carried out. The preselection provides 39 suitable refrigerants, mainly hydrocarbons (HC) and hydrofluoroolefins (HFO), all of which are at least moderately flammable. Second, the preselected refrigerants are analyzed simulatively and experimentally in four refrigerant cycles. The studies show that the HC lead to on average 10
LB  - PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
DO  - DOI:10.18154/RWTH-2025-07755
UR  - https://publications.rwth-aachen.de/record/1018275
ER  -