A through-life evaluation of end-of-life rolling stocks considering asset recycling, energy recovering, and financial benefit

Kaewunruen, Sakdirat; Rungskunroch, Panrawee; Jennings, De’Von

doi:10.1016/j.jclepro.2018.11.271

Cited by 24 publications

(22 citation statements)

References 61 publications

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“…With on-site being favoured as the most preferred option it is best to explore what the options available are. Some study mentioned that the only energy carrier that is relatively easy to export is electricity, and the mainstream microgeneration technology is PV panels [40], unfortunately using just a PV system solely for all power in the house requires a system so large that it results in a payback time of around 82.8 years [32]. However, it could be related to the relatively low cost of electricity in Quebec, which was the location of their case study, resulting in a smaller financial return.…”

Section: Energy Production Methodsmentioning

confidence: 99%

“…With respect to the method to find net-zero energy building NZEB, grid electricity is described by the term delivered energy [31], this implies that a grid connection is needed as grid electricity will be utilised at times when there is not enough on-site energy production. This grid connection is also needed as electricity is sold back to the grid [32] and is key to paying for many of the expensive technologies required of an NZEB. Some options of NZEB also only use electricity from the grid to supplement on-site renewable energy [33] hence making this grid connection a crucial part of the balance.…”

Section: Grid Connectionmentioning

confidence: 99%

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A Digital-Twin Evaluation of Net Zero Energy Building for Existing Buildings

2018

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With buildings around the world accounting for nearly one-third of global energy demand and the availability of fossil fuels constantly on the decline, there is a need to ensure that this energy demand is efficiently and effectively managed using renewable energy now more than ever. Most research and case studies have focused on energy efficiency of ‘new’ buildings. In this study, both technical and financial viability of Net Zero Energy Buildings (NZEB) for ‘existing’ buildings will be highlighted. A rigorous review of open literatures concerning seven principal areas that in themselves define the concept of NZEB building is carried out. In practice, a suitable option of the NZEB solutions is needed for the evaluation and improvement for a specific geographical area. The evaluation and improvement has been carried out using a novel hierarchy-flow chart coupled with a Building Information Model (BIM). This BIM or digital twin is then used to thoroughly visualize each option, promote collaboration among stakeholders, and accurately estimate associated costs and associated technical issues encountered with producing an NZEB in a pre-determined location. This paper also provides a future model for NZEB applications in existing buildings, which applies renewable technologies to the building by aiming to identify ultimate benefit of the building especially in terms of effectiveness and efficiency in energy consumption. It is revealed that the digital twin is proven to be feasible for all renewable technologies applied on the NZEB buildings. Based on the case study in the UK, it can be affirmed that the suitable NZEB solution for an existing building can achieve the 23 year return period.

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Section: Energy Production Methodsmentioning

confidence: 99%

Section: Grid Connectionmentioning

confidence: 99%

A Digital-Twin Evaluation of Net Zero Energy Building for Existing Buildings

2018

Self Cite

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“…In particular, extensive attention and researches are attracted by the evaluation of financial benefits of projects after investment [1]. Financial benefit evaluation is the core of the whole project evaluation, and it has important significance in the enterprise evaluation [2]. At present, financial benefit evaluation is widely used in various fields, but in China, it is mainly adopted in the project management of major investors.…”

Section: Introductionmentioning

confidence: 99%

Effects of cost-benefit analysis under back propagation neural network on financial benefit evaluation of investment projects

Zhong

Xiao-ling

2020

PLoS ONE

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To determine the influence of the weight of the economic effectiveness evaluation criteria of the major investments of listed enterprises, and provide new management ideas for the development of the follow-up enterprises, firstly, the financial benefit evaluation system of investment projects is analyzed and constructed, and the specific evaluation process is analyzed. Then, on this basis, the evaluation index is refined; the basic structure of BP neural network (BPNN) is introduced, and genetic algorithm is used to improve BP neural network. The cost-benefit analysis model is constructed based on the improved BPNN. The listed company A is taken as an example to analyze its development data in recent years, and then the data of 10 listed companies are taken as the research object. Matlab simulation software is used to train and verify the improved BPNN model, analyze and predict the weight value of the financial benefit index of the investment projects of these 10 companies, and then determine the index to improve the financial benefit of the investment projects. Under the analysis of the development data of listed company A in the past 10 years, it is found that the indicators of the listed company's profitability per share, debt risk operation ability, development, and growth ability in the past 10 years are in relatively stable state. The principal component analysis of its 20 secondary sub-indexes is conducted based on the four primary indicators: profitability, debt risk, operational capacity, and development and growth. A total of eight principal components including return on equity (ROE), return on assets (ROA), (total asset turnover) TATO, turnover of account receivable (AR), asset-liability ratio, interest protection multiple, income growth rate, and year-on-year rate of increase for complete assets are extracted. The average error between the final output value, the actual value, and the expected value is 0.0304 and 0.0169, respectively. The weight coefficient of the monetary benefits evaluation indicator of investment items is calculated, and the computed results show that year-on-year rate of increase for complete assets, TOTA, ROA, turnover of total capital, and ROE are important indexes in the financial benefit evaluation of investment projects. It indicates that to improve the financial benefit of investment projects of listed enterprises, it is necessary to enhance the year-over-year growth degree of total properties and ROA.

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“…Based on Kaewunruen's and (2019) research, there are some parts of HSR rolling stock that can be replaced by lightweight materials, i.e., composite material, Advanced High Strength Steel (AHSS) and Magnesium. An obvious benefit of the lightweight material in the vehicle's body was revealed by the US government showing that a "10% reduction in vehicle weight can lead to an 8% improvement in fuel economy" (Kaewunruen et al, 2019). This refers to the decrease in fuel demand for powering vehicle, which in turn degrades CO 2 emissions.…”

Section: Materials Replacement Techniquementioning

confidence: 99%

“…Some have pointed to the management of end-of-life rolling stock (Smink, 2007;Merkisz et al, 2014;Kaewunruen et al, 2019). Regarding Kaewunruen's and (2019) findings, the endof-life rolling stock of HSR contains 37 components and, the study described that recyclability rates (%R cyc ) and recoverability rates (%R cov ) were 61.4 and 73.9%, respectively (Kaewunruen et al, 2019). The main reason for this was that the rolling stock model was composed of steel and mixed aluminium and steel.…”

Section: Introductionmentioning

confidence: 99%