Experimental determination of the optimum intermediate and gas-cooler pressures of a commercial transcritical CO2 refrigeration plant with parallel compression
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Other documents of the author: Nebot-Andres, Laura; Sánchez García-Vacas, Daniel; Calleja-Anta, Daniel; Cabello López, Ramón; Llopis, Rodrigo
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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Title
Experimental determination of the optimum intermediate and gas-cooler pressures of a commercial transcritical CO2 refrigeration plant with parallel compressionAuthor (s)
Date
2021-05-05Publisher
ElsevierISSN
1359-4311Bibliographic citation
NEBOT-ANDRÉS, Laura, et al. Experimental determination of the optimum intermediate and gas-cooler pressures of a commercial transcritical CO2 refrigeration plant with parallel compression. Applied Thermal Engineering, 2021, 189: 116671Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/acceptedVersionSubject
Abstract
CO2 systems used in refrigeration are becoming more complex with the aim of improving their energy
performance. Parallel compression is one of the implemented solutions to enhance the performance of the
plants. ... [+]
CO2 systems used in refrigeration are becoming more complex with the aim of improving their energy
performance. Parallel compression is one of the implemented solutions to enhance the performance of the
plants. However, an optimization process is required to operate this system at high performance and its
operation is subjected to physical limitations in real plants.
This work presents the experimental optimization of a transcritical CO2 plant working with parallel
compression. The plant is tested at different discharge pressures and different secondary compressor speeds
in order to optimize the COP of the plant and determine the optimal conditions for three gas-cooler exit
temperatures 27.5ºC, 32.5ºC and 37.5ºC and three evaporation levels: -15.0ºC, -10.0ºC and -5.0ºC.
The optimal working conditions that can be achieved in a real plant have been determined, obtaining COP
from 1.71 to 2.63 for -5.0ºC, from 1.50 to 2.22 for -10.0ºC and from 1.25 to 1.84 for -15.0ºC. Cooling capacity
ranges from 8.94 kW to 11.34 for -5.0ºC, from 7.71 kW to 9.47 kW for -10.0ºC and from 6.22 kW to 7.76 kW
for -15.0ºC. The trends observed in theoretical results have been corroborated and the optimum gas-cooler
and intermediate pressures have been determined and discussed. [-]
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Applied Thermal Engineering, 2021, 189: 116671Funder Name
Ministerio de Educación, Cultura y Deporte | Ministerio de Ciencia y Tecnología | Jaume I University
Project code
FPU16/00151 | RTI2018-093501-B-C21 | UJI-B2019-56
Rights
info:eu-repo/semantics/openAccess
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