GeoThermag: A geothermal magnetic refrigerator

Aprea, Ciro; Greco, Adriana; Maiorino, Angelo

doi:10.1016/j.ijrefrig.2015.07.014

Cited by 24 publications

(15 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aprea et al in 2015 and 2016 reported on experiments performed on a rotary magnetic refrigerator consisting of a Halbach array with a high average magnetic field of 1.10 T. The refrigerator consisted of eight radially arranged regenerators filled with Gd spheres with a total mass of 1.20 kg. The drive system consisted of a brushless DC motor that rotated the magnets at variable speeds of 0.1–1 Hz.…”

Section: Magnetocaloric Refrigeration and Heat Pumpingmentioning

confidence: 99%

Energy Applications of Magnetocaloric Materials

Kitanovski

2020

Advanced Energy Materials

377

156

View full text Add to dashboard Cite

The need for energy‐efficient and environmentally friendly refrigeration, heat pumping, air conditioning, and thermal energy harvesting systems is currently more urgent than ever. Magnetocaloric energy conversion is among the best available alternatives for achieving these technological goals and has been the subject of substantial basic and applied research over the last two decades. The subject is strongly interdisciplinary, requiring proper understanding and efficient integration of knowledge in different specialized fields. This review article presents a historical and up‐to‐date account of the energy‐related applications of magnetocaloric materials and information about their processing and magnetic fields, thermodynamics, heat transfer, and other relevant characteristics. The article also discusses the conceptual design of magnetocaloric refrigeration and power generation systems and some guidelines for future research in the field.

show abstract

Section: Magnetocaloric Refrigeration and Heat Pumpingmentioning

confidence: 99%

Energy Applications of Magnetocaloric Materials

Kitanovski

2020

Advanced Energy Materials

377

156

View full text Add to dashboard Cite

show abstract

“…Therefore, the model, time after time, assumes the role of Active Magnetic Regenerator (AMR), Active Electrocaloric Regenerator (AER), Active elastocaloric Regenerator (AeR) and Active Barocaloric Regenerator (ABR). The model has been validated experimentally with a rotary magnetic refrigerator developed at University of Salerno [31][32][33][34][35][36].…”

Section: -D Modelmentioning

confidence: 99%

The environmental impact of solid-state materials working in an active caloric refrigerator compared to a vapor compression cooler

Aprea¹,

Greco²,

Maiorino³

et al. 2018

IJHT

Self Cite

View full text Add to dashboard Cite

Caloric refrigeration is an emerging class of cooling technologies based on caloric effects detected in ferro-caloric solid-state materials. Depending of the nature of the driving field, it is possible distinguishing four main caloric refrigerations: magnetocaloric, electrocaloric, elastocaloric and barocaloric. Therefore, caloric refrigeration is based on solid-state materials, unlike vapor compression, nowadays still the most diffused cooling technique, whom employs fluids as refrigerants. Solid-state materials do not provide a direct contribution in global warming, since they do not disperse in the atmosphere, but only an indirect impact is registered when they are employed as refrigerants in cooling systems. On the other side, a vapor compression plant is characterized by both direct and indirect contributions to global warming. The main parameter to evaluate global warming impact and carbon-dioxide emissions coming out from a cooler is the Total Environmental Warming Impact (TEWI) index, which accounts both the direct and indirect contributions produced. In this paper a numerical ∆TEWI analysis is presented, comparing the environmental impact of a caloric refrigerator, operating with different caloric materials, with the one of a vapor compression cooler working with HFC134a.

show abstract

“…A group of channels is formed by stacking particles in the regenerator area: the fluid flows through these interstitial channels. The regenerator's geometry has been chosen according to the characteristics of one of the eight regenerators of the experimental prototype developed at the Refrigeration Lab in the University of Salerno in collaboration with the University of Naples Federico II [9][10][11][12][13]. In this model both the fluid flow and heat transfer between the solid and the fluid have been taken in account.…”

Section: Description Of the 2d Modelmentioning

confidence: 99%

Magnetic refrigeration: A comparison between MnAs and FeRh based alloys in the room temperature range

Aprea¹,

Greco²,

Maiorino³

et al. 2018

TI-IJES

Self Cite

View full text Add to dashboard Cite

This paper describes a two-dimensional (2D) multiphysics model of a parallel plate regenerator made of magnetocaloric material. The regenerator operates as a refrigerant for a magnetic refrigerator operating at room temperature on the strength of an Active Magnetic Regenerator (AMR) cycle. The model is able to simulate the thermofluidodynamic behavior of the magnetocaloric material and the magnetocaloric effect of the refrigerant. With this model direct (MnFeP0.45As0.55) and inverse (Fe49Rh51) magnetocaloric materials have been investigated. The tests were performed with fixed AMR cycle frequency (1.25 Hz), cold heat exchanger temperature (310 K), hot heat exchanger temperature (318 K), while secondary fluid flow rate was varied in the range 0.034÷0.057 kg/s. The secondary fluid used for simulations is liquid water. The results, generated for a magnetic induction which varies from 0 to 1.5 T, are presented in terms of temperature span, refrigeration power and coefficient of performance. Results clearly show that the best material from an efficiency's point of view is Fe49Rh51 which exhibits the highest values of ΔTspan, Qref and COP. Instead MnFeP0.45As0.55 shows, in this temperature range (centered around its Curie point), values of ΔTspan, Qref and COP too low for any kind of practical application.

show abstract

GeoThermag: A geothermal magnetic refrigerator

Cited by 24 publications

References 20 publications

Energy Applications of Magnetocaloric Materials

Energy Applications of Magnetocaloric Materials

The environmental impact of solid-state materials working in an active caloric refrigerator compared to a vapor compression cooler

Magnetic refrigeration: A comparison between MnAs and FeRh based alloys in the room temperature range

Contact Info

Product

Resources

About