scholarly journals Long-Term Performance Analysis Using TRNSYS Software of Hybrid Systems with PV-T

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6921
Author(s):  
Sebastian Pater
Keyword(s):  
Energy Production ◽  
Electric Energy ◽  
Electrical Energy ◽  
Climatic Conditions ◽  
One Year ◽  
Systems Simulation ◽  
Long Term Performance ◽  
Term Performance ◽  
The Impact

A hybrid photovoltaic-thermal collector (PV-T) with the capability to produce thermal energy and electrical energy simultaneously has attracted the attention of researchers, especially in terms of improving PV-T performance. This study analyses the work of four model installations with PV-T and other devices built in the transient systems simulation program. The novelty of this article lies in a long-term approach to the operation of PV-T panels under selected climatic conditions. Influence of the installation’s configuration on the obtained temperatures of solar cells, and, in consequence, on electric power generated by PV-T and the amount of heat produced during one year in a selected location is presented. Among others, the impact of the temperature coefficient of photovoltaic cells for long-term PV-T operation was analyzed in the paper. The results showed that the type of cell used may decrease the yearly electric energy production from PV-T even by 7%. On the other hand, intensification of the process of heat reception from PV-T using a heat pump increased this production by 6% in relation to the base model. The obtained research results indicate possible methods for improving the effectiveness of PV-T operation in a long-term aspect.

scholarly journals Does Corporate Charitable Giving Help Sustain Corporate Performance in China?

2019 ◽  
Vol 11 (5) ◽  
pp. 1491 ◽  
Author(s):  
Keling Wang ◽  
Yaqiong Miao ◽  
Ching-Hui Su ◽  
Ming-Hsiang Chen ◽  
Zhongjun Wu ◽  
...  
Keyword(s):  
Charitable Giving ◽  
Corporate Performance ◽  
Sales Growth ◽  
Short Term ◽  
Return On Equity ◽  
Long Term Performance ◽  
Term Performance ◽  
The Impact ◽  
Total Sales

We examined whether corporate charitable giving (CCG) in China benefits corporate performance (CP) in terms of sales growth (SG), return on asset (ROA), return on equity (ROE), and Tobin’s Q (TQ), and revealed several findings. First, testing shows variation in the impact of CCG on CP. Whereas the ratio of corporate charitable giving (RCCG) to total sales revenue does not significantly enhance SG, ROA, and ROE, it is positively related to TQ. Second, the positive relationship between RCCG and TQ originates from non-state-owned firms (NSOFs) rather than state-owned firms (SOFs). Third, Chinese firms may use CCG as traditional philanthropy to enhance long-term performance instead of strategically using it to generate short-term performance. Lastly, an inverted U-shaped relationship exists between RCCG and TQ, especially for NSOFs.

The Use of Laboratory-Measured and Strain-Gauge Backcalculated Asphalt Stiffness for Rutting Performance Prediction

2019 ◽  
Vol 2673 (3) ◽  
pp. 323-333
Author(s):  
Erdem Coleri ◽  
John T. Harvey
Keyword(s):  
Performance Prediction ◽  
Strain Gauge ◽  
Asphalt Concrete ◽  
Laboratory Tests ◽  
Concrete Materials ◽  
Long Term Performance ◽  
Term Performance ◽  
The Impact

Laboratory tests are conducted with asphalt concrete materials to determine the expected in-situ performance. In addition, laboratory test results are commonly used in mechanistic-empirical design methods for material characterization to improve the predictive accuracy of the models. However, the effectiveness of laboratory tests in characterizing the long-term performance of asphalt concrete materials needs to be validated to be able to use the results for pavement design and long-term performance prediction. Inaccurate performance characterization and prediction can directly affect the decision-making process for pavement maintenance, rehabilitation, and reconstruction and result in unexpected early failures in the field. The major objective of this study is to determine the impact of using laboratory-measured asphalt stiffness on the prediction accuracy of mechanistic-empirical models. In addition, the effect of using linear-elastic modeling assumptions (layered elastic theory) and neglecting the nonlinearity of pavement response at high load levels (and/or at high strain levels for weaker structures) on the predicted rutting performance was determined. In this study, the effectiveness of the use of laboratory asphalt stiffness tests for in-situ asphalt stiffness characterization was determined by comparing the rutting performance predicted using laboratory-measured stiffness to rutting predicted using strain-gauge backcalculated stiffness. It was determined that laboratory tests are able to characterize the in-situ stiffness characteristics of the asphalt mix used in this study and the stiffness characterization process suggested in this study can provide reliable rutting performance predictions. Results of this study are only applicable to tested rubberized asphalt concrete mixtures.

scholarly journals Long-term Performance of Nanoparticle Incorporated Eco-friendly Concrete in Natural Seawater Environment

2021 ◽  
Author(s):  
John Philip ◽  
Manu Harilal ◽  
Anandkumar Balakrishnan ◽  
Rani Pongachira George ◽  
Shaju Kattukaran Albert
Keyword(s):  
Order Reduction ◽  
Chloride Content ◽  
Total Biomass ◽  
Natural Seawater ◽  
Free Chloride ◽  
Lower Chloride ◽  
One Year ◽  
Long Term Performance ◽  
Term Performance

Abstract The use of blended concrete has widely gained industrial importance owing to the CO2 gas emissions and carbon footprint resulting from the production of ordinary Portland cement (OPC). Despite the advancements, the deterioration of concrete structures raises a significant threat to their long term durability and service life in aggressive conditions. In this work, the long-term antifouling, strength and durability properties of a blended eco-friendly concrete with OPC, fly ash, nanoparticles, and corrosion inhibitor is evaluated in natural seawater for one year. The biofouling attachment, total viability count (TVC), mechanical strength, alkalinity and free chloride contents were measured and the results were compared with OPC concrete. A four-order reduction in the total biomass and total bacterial density is observed on the surface of the blended concrete. Further, a significantly lower chloride and water penetration depth, free chloride content, compact and smooth surface morphology devoid of cracks and high C-S-H content are observed in blended concrete, compared to the OPC concrete, after exposure in seawater for one year. From the results, it is seen that the blended concrete mix is promising for applications in seawater environments because of its superior biofouling resistance, mechanical properties and durability.

scholarly journals WILL THE WINNER STILL BE THE WINNER? A STUDY OF EQUITY MUTUAL FUND PERFORMANCE IN INDONESIA

2020 ◽  
Vol 21 (2) ◽  
pp. 566-577
Author(s):  
Budi Frensidy ◽  
Reynardo Nainggolan ◽  
Robiyanto Robiyanto
Keyword(s):  
Mutual Funds ◽  
Mutual Fund ◽  
Time Frame ◽  
Fund Performance ◽  
Equity Mutual Funds ◽  
Stable Performance ◽  
One Year ◽  
Long Term Performance ◽  
Term Performance

In this study, we explore the consistency of Indonesian Rupiah (IDR) – denominated equity mutual funds offered in Indonesia from 2007 to 2017 from various holding periods, namely one year, three years, and five years. Two questions are addressed. Will the winning mutual funds be the winner in the following period? Is the performance of a longer period more persistent than that of the shorter period? Using the nominal return from these eleven years, we find that the equity mutual funds in Indonesia earn no stable performance. The winner will not always be the winner in the following observed period. In addition, no evidence is found that long-term performance would result in a better persistence than that of the shorter time frame.

Welfare of the neonate lamb immediately after tail-docking

1999 ◽  
Vol 1999 ◽  
pp. 108-108
Author(s):  
A. B. Notman ◽  
H. L. Heath ◽  
J. Hill
Keyword(s):  
Detrimental Effect ◽  
Routine Practice ◽  
Normal Behaviour ◽  
The United Kingdom ◽  
Tail Docking ◽  
Ewe Lamb ◽  
Long Term Performance ◽  
Term Performance ◽  
The Impact

Tail docking of new born lambs is a routine practice in the United Kingdom. It has been used as a strategy to reduce the impact of myriasis (blowfly strike). There is only a limited period of time after birth (up to seven days) during which lambs can be docked without the use of anaethesia. Tail docking may have a detrimental effect on the ewe-lamb bond if the process leads to significant and sustained pain. French, Wall and Morgan (1994) suggested lambs suffer acute pain immediately after the procedure of docking but this potential disturbance of normal behaviour during the first few days of life did not seem to affect the long-term performance of lambs. The study reported in this paper considers the effect of tail docking on the behaviour of lambs during the first 90 minutes after docking and on lamb performance to slaughter.

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