Sizing strategies of photovoltaic systems in nZEB schemes to maximize the self-consumption share

Cillari, Giacomo; Franco, Alessandro; Fantozzi, Fabio

doi:10.1016/j.egyr.2021.09.117

Cited by 19 publications

(4 citation statements)

References 22 publications

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“…Panel-to-roof area ratios of 100% and 50% and a panel-to-floor ratio of 10% were considered as the sensitivity analysis cases. Full self-use with minimized imported energy (electricity) could not be achieved and, as mentioned in [72], this is impractical as oversized PV systems are required. A ratio of 10% of floor area appeared to be the optimized ratio as it increased self-use from an average of 20% to 40% compared to the other two.…”

Section: Cooling Alternativesmentioning

confidence: 99%

Comparison of Space Cooling Systems from Energy and Economic Perspectives for a Future City District in Sweden

et al. 2023

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In this study, the performance of different cooling technologies from energy and economic perspectives were evaluated for six different prototype residential Nearly Zero Energy Buildings (NZEBs) within a planned future city district in central Sweden. This was carried out by assessing the primary energy number and life cycle cost analysis (LCCA) for each building model and cooling technology. Projected future climate file representing the 2050s (mid-term future) was employed. Three cooling technologies (district cooling, compression chillers coupled/uncoupled with photovoltaic (PV) systems, and absorption chillers) were evaluated. Based on the results obtained from primary energy number and LCCA, compression chillers with PV systems appeared to be favorable as this technology depicted the least value for primary energy use and LCCA. Compared to compression chillers alone, the primary energy number and the life cycle cost were reduced by 13%, on average. Moreover, the district cooling system was found to be an agreeable choice for buildings with large floor areas from an economic perspective. Apart from these, absorption chillers, utilizing environmentally sustainable district heating, displayed the highest primary energy use and life cycle cost which made them the least favorable choice. However, the reoccurring operational cost from the LCCA was about 60 and 50% of the total life cycle cost for district cooling and absorption chillers, respectively, while this value corresponds to 80% for the compression chillers, showing the high net present value for this technology but sensitive to future electricity prices.

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Section: Cooling Alternativesmentioning

confidence: 99%

Comparison of Space Cooling Systems from Energy and Economic Perspectives for a Future City District in Sweden

et al. 2023

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“…At the same time, PV technologies enable nearly zeroenergy buildings by replacing electricity demand with on-site energy generation [10], [11]. PV string inverters are also widely available and highly efficient [12].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Design Requirements and Optimization Possibilities of Partial Power Converter for Photovoltaic String Applications in DC Microgrids

Chub,

Hassanpour,

Yadav

et al. 2024

IEEE Access

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The focus is on partial power converters interfacing photovoltaic strings in dc microgrids.Step-up/down partial power converters were considered for providing the lowest active power processing. This study considers three Si-based photovoltaic modules commonly used in residential applications: 54-, 60-, and 66-cell. Different configurations of photovoltaic strings are analyzed to find at what voltages most energy is generated in hot and cold climates. Combining these results with the operating voltage range of a droop-controlled dc microgrid yields design requirements for the partial power interface converters. The proposed design limits the maximum power the converter processes to optimize its components. Next, the application of the topology morphing control is studied regarding the performance enhancement of partial power converters. Experimental results demonstrate the converter performance in the target operation range and the feasibility of efficiency improvement with the topology morphing control.INDEX TERMS dc-dc converters, dc microgrids, partial power conversion, photovoltaic energy.

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“…This positive synchronization during summer period is aided by PVs' maximum electricity generation, as seen by the considerable number of papers analyzing the combination of HPs with PV plants [8][9][10][11]. Moreover, since shared buildings are larger in size than residential ones, the possibility to store energy may be an interesting flexibility reservoir for the grid electricity excess due to intermittent RESs, along with an improvement in the overall system performance [12,13].…”

Section: Introductionmentioning

confidence: 99%

An ICT platform based on a multi-objective control systemic approach for reducing energy use in public buildings

Franco

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Towards a goal of efficiency through energy use reduction, the paper analyses the perspectives of promoting the concept of integrated energy management in public buildings through implementation of technical energy efficiency measures and solutions supported by the implementation of ICT technologies, useful both for optimisation based on a multi-objective control systemic approach and for contributing to changing users’ behaviours and to motivate their support taking advantage of ICT (e.g. personalised data driven applications, gaming and social networking). The use of the platform has been tested in two educational buildings. The perspective of reducing energy consumption up to 15% has been appreciated

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Sizing strategies of photovoltaic systems in nZEB schemes to maximize the self-consumption share

Cited by 19 publications

References 22 publications

Comparison of Space Cooling Systems from Energy and Economic Perspectives for a Future City District in Sweden

Comparison of Space Cooling Systems from Energy and Economic Perspectives for a Future City District in Sweden

Analysis of Design Requirements and Optimization Possibilities of Partial Power Converter for Photovoltaic String Applications in DC Microgrids

An ICT platform based on a multi-objective control systemic approach for reducing energy use in public buildings

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