Annals of the University of Craiova - Agriculture, Montanology, Cadastre Series
Abstract
The problem of making heating systems more efficient was imposed due to the trend of increasing the demand for energy correlated in the same time with the increase of energy costs. Out of the various forms of energy used, in the current trend of developing the technique, the heat energy has the largest share in the energy balance of a country. EU policy in this field, expressed by the White Paper and the European Directive 2001/77/EC on energy production from renewable sources, states that, by 2020, the European Union will need to provide the necessary energy in a ratio of about 15 % by harnessing renewable sources. A solution of recovering the important heat quantities from the environment is the use of heat pumps which offers a real alternative to classic fuels, while contributing to reducing CO2 emissions up to 50% compared to using conventional boilers. They get about three quarters of the energy required for heating from the environment, and for the rest, they use electricity as driving energy
