Towards a 100% renewable energy share for heating and cooling in office buildings with solar and geothermal energy

Pilou, Marika; Kosmadakis, George; Meramveliotakis, George; Krikas, Achileas

doi:10.1016/j.seja.2022.100020

Cited by 7 publications

(4 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A brief description of the system's components and main parameters is given next, while further details can be found in Refs. [9,27].…”

Section: Pilot System Descriptionmentioning

confidence: 99%

“…The unsteady heat gain equation, as given by Equation (9), is used to model the PVT collectors [33]. The unsteady term allows for better modeling of heat and electricity production over time, including the low-solar-radiation periods when there is no solar fluid circulation, but a small amount of electricity is still produced.…”

Section: Pvt Collectorsmentioning

confidence: 99%

“…Further details of the numerical tool, such as the necessary inputs (e.g., weather data) can be found in Ref. [9].…”

Section: Numerical Toolmentioning

confidence: 99%

“…Heat-pump technology progressively decreases the carbon footprint even further when employing new low Global Warming Potential (GWP) refrigerants, such as natural refrigerants and new generation hydrofluoroolefins (HFOs) with a GWP even lower than 10 [7,8]. By combining heat pumps with other renewable energy sources, such as solar or geothermal energy [9], builders can further increase the coefficient of performance (COP) and production in buildings, as well as its validation. The energy system, which includes a multi-source vapor compression heat pump, PVT collectors, borehole thermal energy storage (BTES), and water tanks for thermal energy storage, is particularly flexible, as it allows for quick adjustments of operational parameters and the heat sources/sinks of the heat pump to maximize its performance based on the system status in each timestep.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modeling of an Integrated Renewable-Energy-Based System for Heating, Cooling, and Electricity for Buildings

2023

Self Cite

View full text Add to dashboard Cite

An integrated numerical model that describes the operation of a renewable-energy-based system for a building’s heating, cooling, and domestic hot water needs is described in this study. The examined energy system includes a vapor compression multi-source heat pump, PVT collectors, borehole thermal energy storage, and water tanks. Energy balance equations for the collectors and the tanks are coupled with correlations for the heat pump and the piping losses within a thermal network approach. The non-linear system of equations that arises is solved by employing in-house software developed in Python v. 3.7.3. The performance of the numerical tool is validated against measurements collected during the pilot operation of such a system installed in Athens (Greece) for two 5-day periods (summer and winter). It is shown that the proposed model can predict, both qualitatively and quantitatively, the building’s energy system performance, whereas limited deviations from the experimental findings are mostly observed when highly transient phenomena occur. The numerical tool is designed with flexibility in mind and can be easily adapted to accommodate additional energy-system configurations and operational modes. Thus, it can be utilized as a supporting decision tool for new energy systems’ designs and the optimization of existing ones.

show abstract

“…A brief description of the system's components and main parameters is given next, while further details can be found in Refs. [9,27].…”

Section: Pilot System Descriptionmentioning

confidence: 99%

Section: Pvt Collectorsmentioning

confidence: 99%

“…Further details of the numerical tool, such as the necessary inputs (e.g., weather data) can be found in Ref. [9].…”

Section: Numerical Toolmentioning

confidence: 99%