Analysis of Retrofit Solutions of a Ground Source Heat Pump System: An Italian Case Study

Angelo Zarrella, Roberto Zecchin, Philippe Pasquier, Diego Guzzon, Enrico Prataviera, Jacopo Vivian, Michele De Carli and Giuseppe Emmi
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Angelo Zarrella: Department of Industrial Engineering, University of Padua, Via Venezia 1, 35131 Padova, Italy
Roberto Zecchin: Department of Industrial Engineering, University of Padova; Via VIII Febbraio 2, 35122 Padova, Italy
Philippe Pasquier: Department of Civil, Geological and Mining Engineering, Polytechnique Montréal, P.O. Box 6079 Centre-Ville, Montréal, QC H3C 3A7, Canada
Diego Guzzon: Manens-Tifs S.p.A., Corso Stati Uniti 56, 35127 Padova, Italy
Enrico Prataviera: Department of Industrial Engineering, University of Padua, Via Venezia 1, 35131 Padova, Italy
Jacopo Vivian: Department of Industrial Engineering, University of Padua, Via Venezia 1, 35131 Padova, Italy
Michele De Carli: Department of Industrial Engineering, University of Padua, Via Venezia 1, 35131 Padova, Italy
Giuseppe Emmi: Department of Industrial Engineering, University of Padua, Via Venezia 1, 35131 Padova, Italy

Energies, 2020, vol. 13, issue 21, 1-19

Abstract: Ground coupled heat pumps are a notoriously efficient system for heating and cooling buildings. Sometimes the characteristics of the building and the user’s needs are such that the amount of heat extracted from the ground during the winter season can be considerably different from the amount injected in summer. This situation can cause a progressive cooling or heating of the ground with a negative effect on the energy efficiency and correct operation of the system. In these cases, an accurate sizing has to be done. In systems already built, it could be necessary to intervene a posteriori to remedy an excessive ground thermal drift due to the energy unbalance. In this work, such a situation relating to a real office building in Italy is investigated and several solutions are examined, one of which has been then implemented. In particular, a hybrid heat pump using as heat sink both the ground and external air is compared with common solutions through computer simulations using a dedicated numerical model, which has also been compared with monitoring data. As a result, the hybrid heat pump shows better performance and limits the thermal drift of the ground temperature.

Keywords: ground source heat pump; heat pump; hybrid systems; dual source heat pump; EnergyPlus; borehole heat exchanger; HVAC retrofit (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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