Energy Analysis and Cost-Effective Design Solutions for a Dual-Source Heat Pump System in Representative Climates in Europe

Maciej Milanowski, Antonio Cazorla-Marín and Carla Montagud-Montalvá ()
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Maciej Milanowski: Instituto Universitario de Investigación en Ingeniería Energética, Universitat Politècnica de València, 46022 Valencia, Spain
Antonio Cazorla-Marín: Instituto Universitario de Investigación en Ingeniería Energética, Universitat Politècnica de València, 46022 Valencia, Spain
Carla Montagud-Montalvá: Instituto Universitario de Investigación en Ingeniería Energética, Universitat Politècnica de València, 46022 Valencia, Spain

Energies, 2022, vol. 15, issue 22, 1-30

Abstract: Ground-source heat pumps are an efficient technology for heating and cooling in buildings. However, the main limitation of their widespread application is the borehole heat exchanger’s (BHE) high investment cost. Hybridizing GSHP systems may overcome this limitation. This research work analyzes the long-term energy performance of a dual-source heat pump (DSHP) system, which uses the air or the ground as external heat/sink sources, in three representative European climates. First, a BHE cost-effective design solution is proposed for each climatology; then, a complete energy analysis is carried out, and the optimal source control parameters that best enhance the system performance in each climate are determined with the use of a complete dynamic model of the DSHP system developed in TRNSYS. Simulations were carried out for a 25-year operation period. Results show that the DSHP maintains the efficiency during the simulated period, with deviations lower than 1.7% in all cases. Finally, the source control optimization method results in only slight efficiency gains (<0.35%) but with a stronger effect on the ground/air use ratio (up to 25% use of air in cold climates), reducing the thermal imbalance of the ground and leading to a consequent BHE size length and cost reduction.

Keywords: ground-source heat exchanger; dynamic simulation in TRNSYS; dual-source heat pump; energy assessment; renewable heating and cooling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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