The ability to predict the short-term behavior of ground loop heat exchangers (GLHE) is critical to the design and energy analysis of ground source heat pump (GSHP) systems. Thermal load profiles vary significantly from building to building – GLHE designs can be dominated by long-term heat build-up or short-term peak loads. In some extreme cases, where the GLHE design is dominated by short-term...

In the European Union, 40% of overall final energy consumption is attributable to buildings sector. A reason for such data may be found considering that great majority building stock more than 40 years old. According Commission, an interesting potential lies in refurbishment sector, and heat pump technology has been recognized as one most cost-effective solutions tackle environmental issue this...

Ground-source heat pumps are an efficient technology for heating and cooling in buildings. However, the main limitation of their widespread application is borehole exchanger’s (BHE) high investment cost. Hybridizing GSHP systems may overcome this limitation. This research work analyzes long-term energy performance a dual-source pump (DSHP) system, which uses air or ground as external heat/sink ...

Shallow Geothermal Energy (SGE) exploited by vertical close loop Ground Source Heat Pumps (GSHP) is a proven, reliable, and widespread renewable heating cooling technology. However, in many regions there still lack of awareness among policy makers end users, constituting major constraint to wider deployment SGE. In order contribute its market consolidation, this work focuses on bringing light r...

For reducing the initial GSHP investment, heat transfer efficiency of borehole exchange (BHE) system can be enhanced to reduce number or depth drilling. This paper proposes a novel and simple BHE design by changing cross-sectional shape U-tube increase BHEs. Specifically, in this study, we (1) verified reliability three-dimensional numerical model based on thermal response test (TRT) (2) compar...

Heating ventilating air-conditioning (HVAC) systems have been increasingly widespread in Italy: they can exploit renewable energies, are energy efficient systems, do not directly consume fossil fuels, and the post-pandemic era, also subject to incentive processes by Italian government. In South Tyrol, harsh climates both winter summer seasons, ground-source heat pump (GSHP) be an excellent solu...

The use of renewable energies, especially in metropolises has led to a reduction in environmental pollution and greater access to clean, renewable and sustainable energy. This paper evaluates the effectiveness of a national plan adopted by the Tehran city council for reducing air pollutions. This plan is designed to increase the share of renewable energies in residential buildings. This study a...