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Article

Techno-Economic Analysis of a Heat Pump Cycle Including a Three-Media Refrigerant/Phase Change Material/Water Heat Exchanger in the Hot Superheated Section for Efficient Domestic Hot Water Generation

1
AIT Austrian Institute of Technology, Center for Energy, Giefinggasse 2, 1210 Wien, Austria
2
GREiA Research Group, Universitat de Lleida, Pere de Cabrera s/n, 25001 Lleida, Spain
3
AKG Verwaltungsgesellschaft mbH, Am Hohlen Weg 31, 34369 Hofgeismar, Germany
4
OCHSNER Wärmepumpen GmbH, Krackowizerstraße 4, 4020 Linz, Austria
5
Pink GmbH, Bahnhofstrasse 22, 8665 Langenwang, Austria
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(21), 7873; https://doi.org/10.3390/app10217873
Received: 16 October 2020 / Revised: 2 November 2020 / Accepted: 4 November 2020 / Published: 6 November 2020
(This article belongs to the Special Issue Design and System Integration of Thermal Energy Storage)
Integration of a three-media refrigerant/phase change material (PCM)/water heat exchanger (RPW-HEX) in the hot superheated section of a heat pump (HP) system is a promising approach to save energy for domestic hot water (DHW) generation in multi-family houses. The RPW-HEX works as a desuperheater and as a latent thermal energy storage in the system. The latent thermal energy storage is charged during heating and cooling operation and discharged for DHW production. For this purpose, the water side of the RPW-HEX is connected to decentralized DHW storage devices. DHW consumption, building standards and climate, energy prices, material costs, and production costs are the constraints for the selection of the optimal storage size and RPW-HEX design. This contribution presents the techno-economic analysis of the RPW-HEX integrated into an R32 air source HP. With the aid of experimentally validated dynamic computer models, the optimal sizing of the RPW-HEX storage is discussed to maximize energy savings and to minimize the investment costs. The results are discussed in the context of a return of investment analysis, practical implementation aspects and energetic potential of the novel technology. View Full-Text
Keywords: techno-economic analysis; phase change material; heat pump; domestic hot water generation; energy savings techno-economic analysis; phase change material; heat pump; domestic hot water generation; energy savings
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MDPI and ACS Style

Emhofer, J.; Marx, K.; Barz, T.; Hochwallner, F.; Cabeza, L.F.; Zsembinszki, G.; Strehlow, A.; Nitsch, B.; Wiesflecker, M.; Pink, W. Techno-Economic Analysis of a Heat Pump Cycle Including a Three-Media Refrigerant/Phase Change Material/Water Heat Exchanger in the Hot Superheated Section for Efficient Domestic Hot Water Generation. Appl. Sci. 2020, 10, 7873. https://doi.org/10.3390/app10217873

AMA Style

Emhofer J, Marx K, Barz T, Hochwallner F, Cabeza LF, Zsembinszki G, Strehlow A, Nitsch B, Wiesflecker M, Pink W. Techno-Economic Analysis of a Heat Pump Cycle Including a Three-Media Refrigerant/Phase Change Material/Water Heat Exchanger in the Hot Superheated Section for Efficient Domestic Hot Water Generation. Applied Sciences. 2020; 10(21):7873. https://doi.org/10.3390/app10217873

Chicago/Turabian Style

Emhofer, Johann, Klemens Marx, Tilman Barz, Felix Hochwallner, Luisa F. Cabeza, Gabriel Zsembinszki, Andreas Strehlow, Birgo Nitsch, Michael Wiesflecker, and Werner Pink. 2020. "Techno-Economic Analysis of a Heat Pump Cycle Including a Three-Media Refrigerant/Phase Change Material/Water Heat Exchanger in the Hot Superheated Section for Efficient Domestic Hot Water Generation" Applied Sciences 10, no. 21: 7873. https://doi.org/10.3390/app10217873

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