Heat pump features can take advantage of better sources than air, for instance the ground heat, solar heat and heat recovery. A multisource system aims to enhance the performances of the heat pump, leading to a significant amount of primary energy being saved. The present work shows data...

The consumption of natural gas as a primary energy source in Italy has increased during recent years, mainly due to more widespread use of modern natural gas-fired combined cycle power plants. It is generally accepted that such an increased use of natural gas is beneficial, particularly in...

In the present paper the energy impact of buildings' insulation materials in Italy is analyzed, taking into account both the savings in the annual climatisation and the energy consumed to produce them (Life Cycle Assessment, LCA); furthermore the economic matter is evaluated in an investment...

It is estimated that about 140 million heat pumps are working in the world. This evidences that the equipment conceived by Lord Kelvin back in 1852 has finally penetrated into the market. In the last 20 years the heat pump has improved both regarding the thermal exchange surfaces, the...

Free cooling is sometimes useful to face up not only ventilation load but also cooling load as well, taking advantage, directly or indirectly, of the enthalpy difference between inside and outside air in summer. The paper reports on the analysis of the energetic advantage of direct and indirect...