Prediction and assessment of automated lifting system performance for multi-storey parking lots powered by solar energy

Elhenawy, Yasser; Hafez, G.; Abdel-Hamid, S.M.S.; Elbany, Marwa

doi:10.1016/j.jclepro.2020.121859

Cited by 22 publications

(11 citation statements)

References 26 publications

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“…The proposed cooled LCPV system's environmental influence was also assessed based on the summer‐long analysis. The reduction of the CO 2 emission cuts using the suggested cooled LCPV technique is calculated as follows 62 :

M_{R} = m_{e} \times italicdE \times t_{life},

where M R represents the decrease of CO 2 emission (g) over the lifespan t life counted 20 years, me is the average emission of CO 2 (904 g/kWh) emitted from a coal‐driven power plant, 63 and dE is the total energy saving of the suggested cooled LCPV system during the period of the summer season (kWh). Figure 19 presents the accumulated electrical power output along with the drop in CO 2 emissions when cooling the LCPV with nanofluid at different nanoparticles volume concentration on a summer seasonal basis.…”

Section: Resultsmentioning

confidence: 99%

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Performance enhancement of concentrator photovoltaic systems using nanofluids

et al. 2020

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In the current study, a newly developed low photovoltaic concentrator (LCPV) equipped with nanofluid-based cooling channels, directly contacting the rare LCPV, was examined in detail. Nanofluid acts as a coolant that flowing over the back of LCPV to maintain its optimal operating temperature with the best overall performance. The coolants used are water and aluminum oxide (Al 2 O 3)/water nanofluids 1%, 2%, and 3% by volume concentration. When circulating a 3%-Al 2 O 3 /water nanofluid, the temperature of the LCPV module is dropped by 16.47 C compared to the uncooled module and keeps its operating temperature under 45 C during the experimental tests. This reduction in the LCPV module temperature with V-trough reflector mirrors in turn increased its performance. The results revealed that the daily electrical output power of the uncooled LCPV module was 1646.85 W, whereas, was 1870.55 W with (13.58%) improvement with the case of water cooling. However, cooling with 3%-Al 2 O 3 /water nanofluid, the power output of the LPVC was 2319.88 W with (24.02%) and (40.86%) enhancement compared to pure water cooling and without cooling respectively. The rise in the volume fraction ratio of Al 2 O 3 nanoparticles remarkably decreases the operating temperature of the LCPV module and improves both electrical and thermal efficiency.

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M_{R} = m_{e} \times italicdE \times t_{life},

Section: Resultsmentioning

confidence: 99%

“…The proposed cooled LCPV system's environmental influence was also assessed based on the summer-long analysis. The reduction of the CO 2 emission cuts using the suggested cooled LCPV technique is calculated as follows 62 :…”

Section: Environmental Impactsmentioning

confidence: 99%

Performance enhancement of concentrator photovoltaic systems using nanofluids

et al. 2020

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“…The S‐T configuration is intensively studied in latent heat thermal energy storage (LHTES). This is because of its easy manufacturing and limited heat loss from the S‐T system 5,24‐26 . The thermal performance was investigated using a combination of heat transfer models, including conduction and convection in an S‐T energy accumulator in both the vertical and horizontal configurations using PCMs 27 .…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of an accumulator unit using phase change material with a fixed volume of fins

2021

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Summary Melting rate enhancement inside an accumulator unit for a phase change material (PCM) has been numerically investigated in a shell‐and‐tube (S‐T) arrangement that incorporates the circular type of fins, considering a fixed total volume of fins. The number of fins was chosen as the design parameter. The heat transfer fluid (HTF) was chosen as water that flows through the selected accumulator unit during the process of melting. The computational fluid dynamics (CFD) technique has been utilized for the simulation of the accumulator using ANSYS FLUENT software by considering a two‐dimensional axisymmetric cylindrical accumulator in a vertical direction. During the melting process, two heat transfer mechanisms were considered, namely, conduction and convection. The HTF flow was 5 L/min with a flow temperature of 358 K for charging. The predicted complete melting time of the PCM decreased by 53.125%, 65.625%, 71.875%, and 71.875% for fins numbering 6, 18, 30, and 36, respectively, compared with the S‐T without fins where it took approximately 480 minutes to melt completely. The optimal fin parameters are recommended in this study as follows: number of fins N = 30, thickness t/d = 0.01858, interval d/L = 0.03227, and aspect ratio t/h = 0.015. These recommended values maximize the thermal performance of the selected accumulator unit. The effects of changing the flow rate of the heat transfer fluid and its inlet temperature have been found to be significant on the PCM melting rate. The total melting time of the PCM is found to be reduced by about 57% when the inlet flow temperature is increased from 343 to 358 K. Moreover, the total melting time reduces by about 70.5% with an increase in the heat transfer fluid mass flow rate from 0.15 to 5 L/min. Furthermore, increasing the HTF flow rate from 0.15 to 5 L/min leads to a reduction of about 61.1% in the predicted total time that is required for solidification. The temperature differences for low flow rates are greater than those for high flow rates. The novelty of this study is in investigating the performance at a fixed total volume of fins.

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“…Today, the extent of consumption of nonrenewable fuel-related energy sources is very high. Solar energy, wind energy, hydroenergy, tidal energy, geothermal energy, and biomass energy are the foremost necessary kinds of renewable energy obtainable [ 1 ]. Wind generation has many advantages.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Reinforced Epoxy Functionalized Carbon Nanotubes Composites for Vertical Axis Wind Turbine Blade

et al. 2021

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Synthetic materials using epoxy resin and woven Kevlar fiber nanocomposites were fabricated in the presence of functionalized multiwalled carbon nanotubes (F-MWCNTs). Kevlar-reinforced epoxy nanocomposites were designed to manufacture a small blade of vertical axis wind turbines (VAWT). It is important to estimate the deflection of the versatile composite turbine blades to forestall the blades from breakage. This paper investigates the effect of F-MWCNTs on mechanics and deflection of reinforced epoxy composites. The outcomes show that the mixing of F-MWCNTs with epoxy resin using a sonication process has a significant influence on the mechanical properties. Substantial improvement on the deflections was determined based on finite element analysis (FEA). The vortices from the vertical axis wind turbines (VAWTs) blades have a negative impact on power efficiency, since small blades are shown to be effective in reducing tip vortexes within the aerospace field. To support the theoretical movement of the VAWT blade, modeling calculations and analyzes were performed with the ANSYS code package to achieve insight into the sustainability of epoxy nanocomposites for turbine blade applications below aerodynamic, gravitational, and centrifugal loads. The results showed that the addition of F-MWCNTs to epoxy and Kevlar has a significant effect on the bias estimated by finite element analysis. ANSYS analysis results showed lower deflection on the blade using epoxy with an additional of 0.50 wt.% of MWCNTs-COOH at tip speed ratios of 2.1, 2.6, and 3.1.

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Prediction and assessment of automated lifting system performance for multi-storey parking lots powered by solar energy

Cited by 22 publications

References 26 publications

Performance enhancement of concentrator photovoltaic systems using nanofluids

Performance enhancement of concentrator photovoltaic systems using nanofluids

Thermal performance of an accumulator unit using phase change material with a fixed volume of fins

Performance Analysis of Reinforced Epoxy Functionalized Carbon Nanotubes Composites for Vertical Axis Wind Turbine Blade

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