Zobrazeno 1 - 10
of 371
pro vyhledávání: '"Natural Refrigerants"'
Publikováno v:
Case Studies in Thermal Engineering, Vol 65, Iss , Pp 105631- (2025)
Most existing studies overlooked the impact of the working fluid charge on turbo-refrigerators for ultralow-temperature applications, especially not on the motor-driven turboexpander-compressor (MTEC) based turbo-refrigerators. This study addresses t
Externí odkaz:
https://doaj.org/article/ace42fd79fe64ff6a4c62a2c0ef3c565
Autor:
Christoph Höges, Jonas Klingebiel, Valerius Venzik, Jona Brach, Philipp Roy, Kaj Neumann, Christian Vering, Dirk Müller
Publikováno v:
Energy Conversion and Management: X, Vol 24, Iss , Pp 100704- (2024)
In heat pumps, the use of refrigerants with a low global warming potential (GWP) gains importance due to increasingly strict regulations regarding their ecological impact. In this regard, hydrocarbons (HCs), hydrofluoroolefins (HFOs), and their mixtu
Externí odkaz:
https://doaj.org/article/f56cdea78375469792d5587f2259647e
Publikováno v:
Revista UIS Ingenierías, Vol 23, Iss 3 (2024)
The present study deals with the performance evaluation of four CO2 booster refrigeration system configurations: a conventional, a parallel compressor, an ejector-based, and an NH3/CO2 cascade configuration, under the ambient conditions of the city o
Externí odkaz:
https://doaj.org/article/45095266c4dd469fac66ed26ab88b8e6
Publikováno v:
Energy Reports, Vol 9, Iss , Pp 158-163 (2023)
Transcritical CO2 (tc-CO2) refrigeration system is a pertinent option for refrigeration at low temperature, but it has high energy consumption with low coefficient of performance (COP) and exergetic efficiency. Thermodynamic properties of CO2 are fav
Externí odkaz:
https://doaj.org/article/c0f1594c5b2844699e9bbae3031f7232
Publikováno v:
Energy Storage and Saving, Vol 2, Iss 3, Pp 532-539 (2023)
Electrification of the heating sector is a major target of energy transition towards a more sustainable, efficient, and less polluted future. Heat pumps are considered more suitable than electrical heaters or fossil-fueled boilers; however, common re
Externí odkaz:
https://doaj.org/article/2bc353bff78945b7bf87a22ba45889e2
Autor:
Cosmin-Mihai Udroiu, Adrián Mota-Babiloni, Pau Giménez-Prades, Ángel Barragán-Cervera, Joaquín Navarro-Esbrí
Publikováno v:
Energy Conversion and Management: X, Vol 20, Iss , Pp 100446- (2023)
Carbon dioxide (CO2, R744) is the only refrigerant in the safest class by the ASHRAE 34 Standard in the group of natural refrigerants, with zero ozone depletion potential and a global warming potential of 1. It has been recently proposed for commerci
Externí odkaz:
https://doaj.org/article/5206decf3bf04a81977f046a57dfa634
Autor:
P. Ganesan, Trygve M. Eikevik
Publikováno v:
Energy Conversion and Management: X, Vol 20, Iss , Pp 100407- (2023)
There is a great demand for clean, high-temperature heating in industries. The present work demonstrates the modeling and analysis of a high-temperature heat pump (HTHP) using a two-stage cascade refrigeration system with newly developed refrigerant
Externí odkaz:
https://doaj.org/article/89075b95d8b449ddbcbcf1e7470dc9e6
Autor:
Alberta Carella, Annunziata D’Orazio
Publikováno v:
Energies, Vol 17, Iss 6, p 1478 (2024)
Due to environmental concerns, natural refrigerants and their use in refrigeration and air conditioning systems are receiving more attention from manufacturers, end users and the scientific community. The study of heat transfer and pressure drop is e
Externí odkaz:
https://doaj.org/article/ee780620e6c64c198285f9f3d2dfd27c
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