Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Designing a more silent and ecological refrigerator with more precise temperature maintenance

03.12.2003


The Thermal Engineering group of researchers at the Public University of Navarre is working on the design of a domestic thermoelectric refrigerator. Unlike the conventional system of producing a cold environment – by vapour compression – the thermoelectricity used in the design of this refrigerator allows the manufacture of more compact and quieter units which respect the environment more.



This first prototype of the thermoelectric domestic refrigerator, commissioned by the multinational BSH Siemens, will be ready in January 2004. Moreover, in current domestic refrigerators the motor cuts in and cuts out, something which does not happen with thermoelectricity and, thus, maintaining the temperature is more accurately carried out.

Innovative technology


Research carried out by the group centred round obtaining of both hot and cold environments with thermoelectricity. This technology is based on the Peltier pad, composed of two plates which have semiconductors incorporated. On applying a direct current and thanks to the electromotive force, one plate is left cold and heat is produced on the other. So, it can work as either a refrigerator or a heat pump.

They are square pads measuring 40 millimetres each side. This pad concentrates all the cold and all the heat and, in order to obtain maximum efficiency, a way of distributing them effectively has to be found. For example, dissipating this heat from here is very difficult, and so a heat exchange device, currently in the patent stage, has been designed. It is a system which enables this highly concentrated heat to be distributed and the heat exchanger to obtain optimum performance.

In the field of the production of cold environments, unlike the conventional system with vapour compression, thermoelectricity offers a great number of advantages. The units are much more compact, they are smaller and do not need maintenance. Moreover, they completely respect the environment as they do not use refrigerant fluids of any kind. Not having CNCs, their operation does not affect the ozone layer nor does it contribute to the greenhouse effect. Nor is acoustic contamination produced as no sound is made. Moreover, a better quality of cold environment is produced due to greater precision in temperature control.

A disadvantage of the system is electrical consumption which is somewhat greater than in a conventional refrigerator.


Contact :
Iñaki Casado Redin
Nafarroako Unibertsitate Publikoa
inaki.casado@unavarra.es
(+34) 948 16 97 82

Garazi Andonegi | Basque research
Further information:
http://www.basqueresearch.com/berria_irakurri.asp?Gelaxka=1_1&Berri_Kod=365&hizk=I
http://www.unavarra.es

More articles from Process Engineering:

nachricht Decontaminating pesticide-polluted water using engineered nanomaterial and sunlight
16.01.2020 | Institut national de la recherche scientifique - INRS

nachricht TUM Agenda 2030: Combining forces for additive manufacturing
09.10.2019 | Technische Universität München

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: High-pressure scientists in Bayreuth discover promising material for information technology

Researchers at the University of Bayreuth have discovered an unusual material: When cooled down to two degrees Celsius, its crystal structure and electronic properties change abruptly and significantly. In this new state, the distances between iron atoms can be tailored with the help of light beams. This opens up intriguing possibilities for application in the field of information technology. The scientists have presented their discovery in the journal "Angewandte Chemie - International Edition". The new findings are the result of close cooperation with partnering facilities in Augsburg, Dresden, Hamburg, and Moscow.

The material is an unusual form of iron oxide with the formula Fe₅O₆. The researchers produced it at a pressure of 15 gigapascals in a high-pressure laboratory...

Im Focus: From China to the South Pole: Joining forces to solve the neutrino mass puzzle

Study by Mainz physicists indicates that the next generation of neutrino experiments may well find the answer to one of the most pressing issues in neutrino physics

Among the most exciting challenges in modern physics is the identification of the neutrino mass ordering. Physicists from the Cluster of Excellence PRISMA+ at...

Im Focus: Therapies without drugs

Fraunhofer researchers are investigating the potential of microimplants to stimulate nerve cells and treat chronic conditions like asthma, diabetes, or Parkinson’s disease. Find out what makes this form of treatment so appealing and which challenges the researchers still have to master.

A study by the Robert Koch Institute has found that one in four women will suffer from weak bladders at some point in their lives. Treatments of this condition...

Im Focus: A step towards controlling spin-dependent petahertz electronics by material defects

The operational speed of semiconductors in various electronic and optoelectronic devices is limited to several gigahertz (a billion oscillations per second). This constrains the upper limit of the operational speed of computing. Now researchers from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, and the Indian Institute of Technology in Bombay have explained how these processes can be sped up through the use of light waves and defected solid materials.

Light waves perform several hundred trillion oscillations per second. Hence, it is natural to envision employing light oscillations to drive the electronic...

Im Focus: Freiburg researcher investigate the origins of surface texture

Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.

Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

70th Lindau Nobel Laureate Meeting: Around 70 Laureates set to meet with young scientists from approx. 100 countries

12.02.2020 | Event News

11th Advanced Battery Power Conference, March 24-25, 2020 in Münster/Germany

16.01.2020 | Event News

Laser Colloquium Hydrogen LKH2: fast and reliable fuel cell manufacturing

15.01.2020 | Event News

 
Latest News

Turbomachine expander offers efficient, safe strategy for heating, cooling

25.02.2020 | Power and Electrical Engineering

The seismicity of Mars

25.02.2020 | Earth Sciences

Cancer cachexia: Extracellular ligand helps to prevent muscle loss

25.02.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>