In the 2015 United Nations Climate Change Conference, COP 21 in Paris, world leaders have been negotiating to limit the global warming to below 2°C by 2100. These talks are necessary to avoid serious climate catastrophes and reduce greenhouse gas emissions by increasing the use of zero carbon technologies such as magnetic refrigeration for heating or cooling. This is an emerging, innovative and potential low carbon technology. Due to the increased concern about global warming and an ever increasing energy consumption, the interest in magnetic refrigeration as a new heating or cooling technology competitive to conventional vapour compression has grown considerably over the last 15 years. The principle of magnetic refrigeration is based on a phenomenon known as magnetocaloric effect (MCE). This was discovered by Emil Warburg in 1881 and is related to the property of some exotic materials such as Gadolinium and Dysprosium that heat up when applying a magnetic field and cool down when the magnetic field is removed
