Select your language

They study the obtaining of high efficiency magnetic cooling using holmium

Holmio refrigeración mágneticaInternational. A recent study proposes a technique that could be used for hydrogen liquefaction by magnetic cooling at low temperatures.

Magnetic cooling is a cooling method that uses magnetic fields. It has traditionally been studied for use in refrigeration almost at room temperature. However, recently, researchers have focused on lower target temperatures. For example, for hydrogen liquefaction (which is an attractive option for the storage of renewable energy resources) it is required to cool hydrogen gas to a condensation temperature of 20 K.

With magnetic cooling, cooling is achieved through changes in magnetic entropy that occur when a magnetic field is applied, a phenomenon known as the magnetocaloric effect. So far, most research has used high magnetic fields (at least 5 Teslas) to obtain a large entropy change, which requires a superconducting magnet and, therefore, a large energy cost. For hydrogen liquefaction, the required magnetic field is more than several Teslas in the temperature range between the liquefaction temperatures of hydrogen (20.3 K) and nitrogen (77 K). Therefore, it would be necessary to use stronger magnetic fields, but with a high energy cost to generate the magnetic field.

A recent study has proposed a more efficient magnetic cooling technique, in which small variations in the magnetic field can achieve cooling efficiency of a magnitude greater than has been achieved using typical magnetocaloric materials. The authors used holmium, an antiferromagnetic material that presents a pronounced change in magnetization according to temperature and applied magnetic field. It should be noted that the authors did not find a significant conventional magnetocaloric effect. They found that a small variation of the magnetic field allows for very efficient magnetic cooling by using materials with strong magnetization variations, such as holmium.

- Publicidad -

As for practical applications, previous studies have presented prototypes of AMR refrigerators using superconducting magnets. In this study, the authors discussed the possible use of a magnetic cooling system called an active magnetic regenerator (AMR) with holmium, using a small change in the magnetic field.

The authors hope their findings can open up a new field of research focused on magnetic cooling at a reduced cost using a low magnetic field. In fact, the proposed technique can be implemented using permanent magnets, rather than the superconducting magnets normally used in current research, which require large operating costs. The authors believe that the proposed technique could be a suitable alternative to conventional gas compression cooling for hydrogen liquefaction.

Source: Nature.

Duván Chaverra Agudelo
Duván Chaverra AgudeloEmail: [email protected]
Editor Jefe
Jefe Editorial en Latin Press, Inc,. Comunicador Social y Periodista con experiencia de más de 12 años en medios de comunicación. Apasionado por la tecnología. Director Académico del Congreso RefriAméricas.

No comments

• If you're already registered, please log in first. Your email will not be published.

Leave your comment

In reply to Some User
Building Automation Days 2025 in Bogota marks a milestone for the KNX standard in Latin America

Building Automation Days 2025 in Bogota marks a milestone for the KNX standard in Latin America

Colombia. With more than a hundred attendees and the participation of six high-profile exhibitors, Building Automation Days by KNX LATAM, Colombia edition, established itself as the most relevant...

Design Envelope Technology Hits 750 gpm Fire Pump Segment

Design Envelope Technology Hits 750 gpm Fire Pump Segment

Canada. In response to the growing demands of the fire protection industry, Armstrong Fluid Technology announced the expansion of its Vertical-In-Line pump line with the addition of the new 5x4x10PF...

Greenheck Launches New RV-220 Model and Expands Its Line of Dedicated Outdoor Air Systems

Greenheck Launches New RV-220 Model and Expands Its Line of Dedicated Outdoor Air Systems

United States. Greenheck announced the addition of the RV-220 to its line of dedicated outdoor air systems (DOAS), a solution that responds to the growing demand for equipment with greater outdoor...

Embraco enters the HVAC market with new scroll compressors and aims to become a full-service supplier

Embraco enters the HVAC market with new scroll compressors and aims to become a full-service supplier

Brazil. Embraco announced its official entry into the heating, ventilation and air conditioning (HVAC) market following the acquisition of the specialized company Xecom, and the launch of a new line...

SIGMAN GROUP and Carrier-VRF reinforce technical training in the HVAC sector in Ecuador

SIGMAN GROUP and Carrier-VRF reinforce technical training in the HVAC sector in Ecuador

Ecuador. An intensive week of technical and commercial training brought together key players in the HVAC sector in Quito and Guayaquil, thanks to the joint initiative of GRUPO SIGMAN and...

AHR Expo Mexico 2025 returns to Monterrey with its most ambitious edition yet

AHR Expo Mexico 2025 returns to Monterrey with its most ambitious edition yet

Mexico. The event returns this year to Monterrey with an unprecedented edition. The exhibition, dedicated to air conditioning, ventilation, heating, refrigeration and filtration solutions, promises...

Fujitsu Launches New AIRSTAGE Multi-Position Air Handler with R-32 Refrigerant

Fujitsu Launches New AIRSTAGE Multi-Position Air Handler with R-32 Refrigerant

United States. Fujitsu General America announced the launch of its new AIRSTAGE Multi-Position Air Handling Unit (MPAHU), designed to provide greater application flexibility by easily...

HVAC project at the Javeriana University, finalist in the CALA Awards 2025 in the HVAC category

HVAC project at the Javeriana University, finalist in the CALA Awards 2025 in the HVAC category

The HVAC system installed in the building of the Faculty of Sciences of the Pontificia Universidad Javeriana, in Bogotá, was selected as a finalist in the HVAC category of the CALA Awards 2025. The...

Concord Project in La Lima Free Trade Zone, finalist in the HVAC category of the CALA Awards 2025

Concord Project in La Lima Free Trade Zone, finalist in the HVAC category of the CALA Awards 2025

The HVAC system project carried out by MultiFRIO for the company Concord in the La Lima Free Trade Zone, in Cartago, received the final prize in the HVAC category of the CALA Awards 2025, a...

HVAC project at the Universidad Santiago de Cali, finalist in the CALA AWARDS HVAC category

HVAC project at the Universidad Santiago de Cali, finalist in the CALA AWARDS HVAC category

The air conditioning project of the Auditorium Building and the Technology Center of the new campus of the Santiago de Cali University was chosen as a finalist in the HVAC category of the CALA...

Free Subscription
Remember Me
SUBSCRIBE TO OUR NEWSLETTER
DO YOU NEED A SERVICE OR PRODUCT QUOTE?
LASTEST INTERVIEWS
SITE SPONSORS










LASTEST NEWSLETTER
Ultimo Info-Boletin