Buscar
Experimental evaluation of a transcritical CO2 refrigeration facility working with an internal heat exchanger and a thermoelectric subcooler: Performance assessment and comparativeÉvaluation expérimentale d’une installation frigorifique au CO2 transcritique fonctionnant avec un échangeur interne de chaleur et un sous-refroidisseur thermoélectrique : évaluation des performances et comparaison
(Elsevier, 2022-08-01)
The use of carbon dioxide in transcritical state has become one of the most used solutions to comply with the F-Gas directive and reduce greenhouse gases emissions from refrigeration systems at high ambient temperatures. ...
A new approach to optimize the energy efficiency of CO2 transcritical refrigeration plants
(Elsevier, 2014-06)
This paper proposes a model-free real-time optimization and control strategy for CO2 transcritical refrigeration plants that assures covering the cooling demand and continuous tracking of conditions for maximum efficiency. ...
Improvements in the cooling capacity and the COP of a transcritical CO2 refrigeration plant operating with a thermoelectric subcooling system
(Elsevier, 2019-06-05)
Restrictive environmental regulations are driving the use of CO2 as working fluid in commercial vapour compression plants due to its ultra-low global warming potential (GWP100 = 1) and its natural condition. However, at ...
Energy improvements of CO2 transcritical refrigeration cycles using dedicated mechanical subcooling
(Elsevier, 2015-07)
In this work the possibilities of enhancing the energy performance of CO2 transcritical refrigeration systems using a dedicated mechanical subcooling cycle are analysed theoretically. Using simplified models of the cycles, ...
Energy comparison based on experimental results of a cascade refrigeration system pairing R744 with R134a, R1234ze(E) and the natural refrigerants R290, R1270, R600a
(Elsevier, 2023)
Refrigeration architectures for low-temperature applications are gaining interest in the Industrial, Commercial and Health fields. One of the most classical architectures is cascade systems, where two mechanical single ...
Comparative study of transcritical vapor compression configurations using CO2 as refrigeration mode base on simulation
(Elsevier, 2013-03)
Despite of the excellent efficiency of the CO2 transcritical cycle in heat pump mode, there is a loss of efficiency in refrigeration mode compared with the subcritical vapor compression cycle with HFC refrigerants. This ...
New positions for an internal heat exchanger in a CO2 supercritical refrigeration plant. Experimental analysis and energetic evaluation
(Elsevier, 2014-02)
IHX is probably, one of the most commonly alternative used to improve cooling capacity and COP in a CO2 refrigerating plant working in supercritical conditions. The “classical” position at gas-cooler exit has been analyzed ...
Experimental enhancement of a CO2 transcritical refrigerating plant including thermoelectric subcooling
(Elsevier, 2020-09-02)
CO2 is an excellent natural refrigerant that can be used in almost any commercial cooling application thanks to its useful range of evaporative temperatures and excellent environmental properties. However, due to its low ...
Integrated supermarket refrigeration for very high ambient temperature
(Elsevier, 2018-12-15)
This paper analytically investigates and compares the performance of a proposed ‘all-natural’ NH3/CO2 cascaded booster system to a conventional R404A direct expansion system as well as to an ‘all-CO2’ system with multi-ejector ...
Role of receiver on the performance of a transcritical CO2 based air-conditioning unit with single-stage and two-stage expansion
(2021-03-22)
Theoretical and experimental studies are carried out on a transcritical CO2 based air-conditioning unit. Two configurations–a system with single-stage expansion (SSE) and a system with two-stage expansion (TSE) have been ...