Article (Scientific journals)
Net Zero Energy Building technologies – Reversible Heat Pump/Organic Rankine Cycle coupled with Solar Collectors and combined Heat Pump/Photovoltaics – Case study of a Chilean mid-rise residential building
Pezo, Matias; Cuevas, Cristian; Wagemann, Enrique et al.
2024In Applied Thermal Engineering, 252, p. 123683
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Keywords :
Heat pump; Numerical model; Organic Rankine cycle; Residential building; Solar energy; % reductions; Energy demands; Final energy; Heat pumps; Organic rankine cycle; Organics; Performance factors; PV system; Seasonal performance; Energy Engineering and Power Technology; Mechanical Engineering; Fluid Flow and Transfer Processes; Industrial and Manufacturing Engineering
Abstract :
[en] In the following years, the building sector will have to considerably reduce its final energy demand and emissions by adopting new technologies. This paper introduces two innovative technologies capable of reducing the final energy demand of residential buildings: A Heat Pump/Organic Rankine Cycle system coupled to solar thermal collectors (HP/ORC-COL), and a Heat Pump coupled with Photovoltaic panels (HP-PV). The HP/ORC-COL system alternates between generating either heat or electricity, whereas the HP-PV system produces them separately. The goal is to compare both systems through their Seasonal Performance Factor (SPF), equivalent emissions, operational cost, and Net Zero Energy Building (NZEB) potential. Additionally, the impact on the heating demand of retrofitting existing buildings with the Passivhaus Standard is studied. The heating, domestic hot water, and electricity demands are determined by considering the climate conditions of three polluted Chilean cities: Santiago, Concepción, and Temuco. The proposed systems are evaluated through numerical models developed in Python and validated with data from manufacturer catalogues. The validation of the models allows to enhance the result accuracy of the integrated overall model by closely aligning outputs with real conditions, and therefore increases the reliability of the prediction on the potential of the building to reach net zero energy. Results show that applying the Passivhaus standard allows to reduce heating requirements by up to 30% in all cities. The SPF and electricity production of the HP-PV system is better than the HP/ORC-COL, reaching a NZEB potential of 76.3% in Santiago, 66.6% in Concepción and 60.4% in Temuco. The average cost reduction of the HP/ORC-COL system compared to oil, natural gas, and wood pellet boilers is 82.7%, 90.4%, and 72.3%, whereas for the HP-PV system is 93.3%, 96.3%, and 89.2% respectively. On the CO2 emissions, the HP/ORC-COL system presents an average reduction of 63.6% and 59.7% compared to an oil and natural gas boiler, while the HP-PV system has an average reduction of 72.5% and 69.5% respectively.
Disciplines :
Energy
Author, co-author :
Pezo, Matias ;  Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Concepción, Concepción, Chile
Cuevas, Cristian ;  Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Concepción, Concepción, Chile
Wagemann, Enrique ;  Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Concepción, Concepción, Chile
Cendoya, Aitor  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)
Language :
English
Title :
Net Zero Energy Building technologies – Reversible Heat Pump/Organic Rankine Cycle coupled with Solar Collectors and combined Heat Pump/Photovoltaics – Case study of a Chilean mid-rise residential building
Publication date :
September 2024
Journal title :
Applied Thermal Engineering
ISSN :
1359-4311
eISSN :
1873-5606
Publisher :
Elsevier Ltd
Volume :
252
Pages :
123683
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 August 2024

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