Experimental investigations on the performance of a vapor compression refrigeration system under the influence of magnetic field generated using magnetic pair and Halbach array

Compared to conventional vapor-compression refrigeration systems, magnetic refrigeration is a promising and potential alternative technology. The magnetocaloric effect (MCE) is used to produce heat and cold sources through a magnetocaloric material (MCM). The material is submitted to a magnetic field with active magnetic regenerative refrigeration (AMRR) cycles. Initially, this effect was widely used for cryogenic applications to achieve very low temperatures. However, this technology must be improved to replace vapor-compression devices operating around room temperature. Therefore, over the last 30 years, a lot of studies have been done to obtain more efficient devices. Thus, the modeling is a crucial step to perform a preliminary study and optimization. In this paper, after a large introduction on MCE research, a state-of-the-art of multi-physics modeling on the AMRR cycle modeling is made. To end this paper, a suggestion of innovative and advanced modeling solutions to study magnetocaloric regenerator is described.

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AN EXPERIMENTAL STUDY ON THE IMPROVEMENT OF COEFFICIENT OF PERFORMANCE IN VAPOR COMPRESSION REFRIGERATION SYSTEM USING GRAPHENE LUBRICANT ADDITIVES

Energy Sources Part A Recovery Utilization and Environmental Effects ◽

10.1080/15567036.2021.1909186 ◽

2021 ◽

pp. 1-17

Author(s):

K. Veera Raghavulu ◽

N. Govindha Rasu

Keyword(s):

Experimental Study ◽

Lubricant Additives ◽

Coefficient Of Performance ◽

Vapor Compression ◽

Refrigeration System ◽

Vapor Compression Refrigeration

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New HFC/HFO Blends as Refrigerants for the Vapor-Compression Refrigeration System (VCRS)

Energies ◽

10.3390/en14040946 ◽

2021 ◽

Vol 14 (4) ◽

pp. 946

Author(s):

Bartosz Gil ◽

Anna Szczepanowska ◽

Sabina Rosiek

Keyword(s):

Global Warming ◽

Global Warming Potential ◽

Mass Fraction ◽

Vapor Compression ◽

Refrigeration System ◽

Operational Parameters ◽

Vapor Compression Refrigeration ◽

Low Global Warming Potential ◽

Triangular Design

In this work, which is related to the current European Parliament Regulation on restrictions affecting refrigeration, four new three-component refrigerants have been proposed; all were created using low Global Warming Potential(GWP) synthetic and natural refrigerants. The considered mixtures consisted of R32, R41, R161, R152a, R1234ze (E), R1234yf, R1243zf, and RE170. These mixtures were theoretically tested with a 10% step in mass fraction using a triangular design. The analysis covered two theoretical cooling cycles at evaporating temperatures of 0 and −30 °C, and a 30 °C constant condensing temperature. The final stage of the work was the determination of the best mixture compositions by thermodynamic and operational parameters. R1234yf–R152a–RE170 with a weight share of 0.1/0.5/0.4 was determined to be the optimal mixture for potentially replacing the existing refrigerants.

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