Investigating the potential for energy flexibility in an office building with a vertical BIPV and a PV roof system

Abstract

Building Integrated Photovoltaics (BIPV) are becoming an attractive solution in the context of high penetration of photovoltaics (PV) in buildings caused by the strive to achieve net or nearly zero energy status. Besides retrieving solar radiation to produce electricity, BIPV also offers aesthetical advantages because of its architectural feature. This paper reports on the electrical energy performance of a passive solar office building, Solar XXI, located in Lisbon, Portugal, which has installed on the South façade a BIPV (12 kWp) and an additional photovoltaic roof system in a nearby car park facility (12 kWp) for electricity generation. The main objective is to investigate the potential to increase load matching between energy generation and consumption and improve grid interaction for two scenarios using the energy flexibility enabled by the integration of Battery Energy Storage Systems (BESS) with capacities ranging from 13.5 kWh to 54 kWh. To collect the required results, real consumption and generation data are used, together with numerical simulations related to the integration of the BESS. The results show that load matching and grid interaction related metrics can be significantly improved by using the energy flexibility provided by a BESS and that the implementation of such system can be economically viable for a 10-year period.

Performance Analysis of a Grid-Connected Rooftop Solar Photovoltaic System

“…The payback ratio value of the system was calculated for time steps of five minutes based on electric energy meters' readings every 30 s [9]. Aelenei et al investigated the electricity generation performance of 12-kWp installed power on the south facade a building integrated photovoltaic (BIPV) and an additional 12-kWp PV roof system in a nearby car park facility for office buildings at the National Laboratory of Energy and Geology (LNEG), in Portugal [10]. Dondariya et al [11] focused on feasibility analysis of grid-connected rooftop solar photovoltaic system (RSPS) at Ujjain Engineering College, in India.…”

Performance of single-sloped pitched roof cadmium telluride (CdTe) building-integrated photovoltaic system in tropical weather conditions

“…Many researchers have carried out the performance studies on the BIPV system, and their focus was mostly on the BIPV roof or the facades [2,3,5,6,[25][26][27]32]. A study by Aristizábal and Páez [5] showed the operational performance of 6 kW BIPV system installed in Colombia (in Bogotá, at 4°35′ latitude and 2.580 m altitude), and their investigation highlights the AC energy (471,083 kWh/month), final yield (88.6 kWh/kWp-year).…”

“…It was highlighted that the performance efficiency of the DSSC BIPV is quite higher in the vertical plane than the sloped plane. The performance of two 12 kWp BIPV systems, one installed on the south façade, and the other as the roof, is investigated in Aelenei et al [2]. Akata et al [3] reported the potentials of BIPV in the tropical region of Cameron.…”

Adapting Integrated High Concentrated PV Modules and Evacuated Tube Collectors to Minimize Building Energy Consumption in Hot Climate

“…They indicated that, photovoltaics can provide the required energy consumption of the studied building and the payback period is smaller than seven years. Passive office facility situated Portugal is examined by Aeleni et al [13]. Actual consumption data are employed together with numerical simulations of integrated battery storage system.…”