Life Cycle Cost Approach Research Articles

Life cycle cost approach involving steam transport model for insulation thickness optimization of steam pipes

Efficient steam pipe insulation is critical for minimizing heat loss during transportation, ensuring the economic viability of thermal processes or end-user applications. Unlike water-based systems, steam heat loss mechanisms are intricate, predominantly influenced by the transition of steam to condensate which introduces latent heat, thus significantly impacting overall heat loss. This study employs a life-cycle cost approach, integrating a comprehensive steam transport model to evaluate the optimal insulation thickness under varying temperature, flow rates and composite insulation schemes. The steam transport model incorporates a drainage energy loss term, providing a detailed depiction of the energy balance along the steam pipe. Results from the steam transportation simulation conducted on a single long pipe demonstrate a ∼4.6 % deviation between simulated and measured heat loss values. Furthermore, Life cycle cost analysis highlights the economically advantageous insulation configuration, comprising an aerogel blanket as the inner layer and glass wool as the outer layer. With increasing temperature, augmenting the proportion of aerogel blanket yields economic benefit, with the optimum thickness exhibiting a linear growth trend. Conversely, as the flow rate increases, the optimum insulation thickness remains constant.

Environmental and socio-economic evaluation of a groundwater bioremediation technology using social Cost-Benefit Analysis: Application to an in-situ metal(loid) precipitation case study

Bioremediation can be an alternative or complementary approach to conventional soil and water treatment technologies. Determining the environmental and socio-economic impacts of bioremediation is important but rarely addressed. This work presents a comprehensive sustainability assessment for a specific groundwater bioremediation case study based on In-situ Metal(loid) Precipitation (ISMP) by conducting a social Cost-Benefit Analysis (CBA) using two different approaches: environmental Life Cycle Costing (eLCC) and Impact Pathway Approach (IPA). Externalities are calculated in two ways: i) using Environmental Prices (EP) to monetize Life Cycle Assessment (LCA) results and metal(loid)s removed at field scale, and ii) following the IPA steps to determine the social costs avoided by removing arsenic contamination at full scale. The results show that, in the baseline scenario, the project is not socio-economically viable in both cases as the Net Present Value (NPV) is −129,512.61 € and − 415,185,140 € respectively. Sensitivity and scenario analyses are performed to identify the key parameters and actions needed to reach a positive NPV. For instance, increasing the amount of water treated per year to 90 m3 and assuming a 20 % increase in operation costs and a 60 % increase in construction costs can make the project socio-economically viable at the field scale, while a reduction in the social discount rate from a 4 % to a 2 % can lead to a positive NPV at the full scale. The approaches proposed in this work may be useful for practitioners and policymakers when evaluating the environmental and socio-economic impacts of bioremediation technologies at different scales and regions, as well as human health impacts caused by contaminants at the current legal limits.

Concrete Self-Healing for Sustainable Buildings: A Focus on the Economic Evaluation from a Life-Cycle Perspective

Concrete is one of the world’s most used and produced materials, based on its dominant role in the construction sector, both for the construction of new structures and for the repair, restoration, and retrofitting of built ones. Recently, research has been focused on the development of innovative solutions to extend the service life of reinforced concrete structures, specifically by introducing self-healing properties aimed at reducing the necessary maintenance interventions and, consequently, the environmental impacts. These solutions imply costs and financial feasibility impacts, which must be measured and evaluated to support the ranking of preferable alternatives. Thus, this paper proposes a methodology capable of supporting the selection of material/product options from the early design stages in the construction sector. Assuming a life-cycle perspective, the Life-Cycle Costing (LCC) approach is proposed for comparing three material solutions applied to the case study of a wall component hypothesized to be used in building construction in Turin, Northern Italy. Namely, traditional standard concrete and two different self-healing concrete types were evaluated using the Global Cost calculation of each solution. The focus is on the material service life as a crucial factor, capable of orienting investment decisions given its effects on the required maintenance activities (and related investments) and the obtainable residual value. Thus, according to a performance approach, LCC is combined with the Factor Method (FM). Assuming the capability of the lifespan to affect the Global Cost calculation, the results give full evidence of the potential benefits due to the use of self-healing materials in construction in terms of the reduction in maintenance costs, the increase in the durability of buildings and structures and related residual values, and consequently, the reduction in the environmental impacts.

TOWARDS POVERTY ALLEVIATION FOR THE BASE OF PYRAMID: SOCIAL BUSINESS MODEL IN URBAN LOW-COST HOUSINGS

Purpose – this study investigates alternative a small-scale social business model that potentially generate sustainable income for households at the base of the pyramid. A comparison of two low-cost housings that have a different geographical condition and local characteristics is examined. Research methodology – this research adopted two-stage approach to address the research objective. A pairwise comparison was employed to evaluate alternatives based on selected criteria for decision-making. In the second stage, the proposed business model was assessed by taking into account investment, processing cost, and revenue. Findings – the findings of this research suggest suitable business model that combine profit orientation and facilitates social mission in urban settings. The business model offers attractive financial feasibility from the investor viewpoint and simultaneously engages low-income households to improve their prosperity level leaving the base of the pyramid (BOP) status. Research limitations – this paper is not involving division of responsibility between stakeholders in low-cost housing and BOP sector. This study also not discussed how social entrepreneurs play a role in the social business model. There is a need to further investigate how the impact of social entrepreneurs on this model and engage collaboration with interest parties to engage community development. Practical implications – the findings recommend strategies that can be used by policy-makers and other related stakeholders to scale-up the business model, empower more low-income households, and create new job opportunities for urban poor. The findings of this research also indicate social business model that enables households at the BOP to earn sustainable income and release their current poverty status. Originality/Value – the research is one of the few studies that explored alternatives to social business models available for urban poor by taking into account project feasibility. No previous research has been attempted to consider both pairwise comparison and life cycle cost approach in the development of social business models. This research can be found useful for those with similar issues not only in emerging economies but also in developed countries.

Comparison of waste photovoltaic panel processing alternatives in Australia

This work aims to compare end-of-life (EoL) alternative processing scenarios of waste photovoltaic panel in Australia. Landfill, generic waste electrical and electronic equipment recycling (European business-as-usual (EU BAU)), full-recovery EoL photovoltaic (FRELP), and Modified FRELP are the alternative processing scenarios considered for the next five years. Environmental analysis by a simplified life cycle assessment is performed using Material, Energy, Chemical, and Other (MECO) matrix. This semi-quantitative comparison eliminates reliance on LCA software and environmental expertise for preliminary screening. Financial analysis is also performed by using a life cycle costing (LCC) approach. Overall, comparative findings are consistent with full-quantitative LCA and LCC despite magnitude differences. Simplified analysis merely reflects process complexity and resource consumption. A full financial insight can only be acquired when non-resource-derived costs are incorporated. Considering the increasing trend of waste levies and landfill ban extending into the future, landfill is no longer the cheapest option in Australia. Consequently, mass-based waste recovery for landfill diversion facilitates cost savings. Recovering 8% more waste with FRELP compared to modified FRELP has the potential to save $19 more per tonne of processed PV waste. EU BAU is the most eco-efficient interim solution, while waste volume is still low. Modified FRELP saves 321 kg CO2-e emission by avoiding traditional incineration. The focus on reclaiming solar-grade silicon rather than silver has the potential to attract $154 more revenue per tonne compared to FRELP.

Optimal sizing of a photovoltaic/energy storage/cold ironing system: Life Cycle cost approach and environmental analysis

Traditional cold ironing allows ships to shut down their auxiliary engines, during the berthing time, and to be powered by an on-shore power supply. Traditionally the energy demand is satisfied by electricity form the national grid. Alternatively, a local energy production increases the energetic self-sufficiency of the port areas and reduces the pressure on the national grid with continuous peaks of energy demand. This way the port area can be considered a microgrid, characterized by both energy producers and consumers. This paper presents an optimization model, implemented on MATLAB, to provide the best sizing for a combined photovoltaic/energy storage/cold ironing system. The ferry traffic of the port of Ancona (Italy) has been taken as case study. The proposed model returns the percentage of the energy demand covered, the interactions with the national grid, and the optimal size of the PV plant and the storage capacity basing on a Life Cycle Cost (LCC) approach. Results show that the optimal configurations are 2100 kW and 3600 kW with 5750 kWh (without and with storage system) considering lower initial and operational costs, and 3700 kW and 6400 kW with 17,350 kWh (without and with storage system) hypothesizing higher costs. All scenarios ensure an environmental saving, compared to traditional on-board diesel generators, with 87.4 % maximal CO2 reduction achieved.

"Using Life Cycle Costing approach For Enhancing Sustainability In The Light Of Value Chain Requirements"

"Using Life Cycle Costing approach For Enhancing Sustainability In The Light Of Value Chain Requirements"

The modified life cycle cost method for the risk-based design of excavation projects

ABSTRACT The life cycle cost (LCC) design method tries to improve conventional design practices with different costs, such as risk costs, over the life cycle of the structure in the design procedure. The present study introduces a modified life cycle cost (MLCC) approach for the design of excavations. Some modifications proposed in the typical LCC design method include considering the effect of risk aversion/seeking of decision-makers in the main LCC formula by a risk-seeking factor and taking in the effect of risk exposure time on risk cost by a risk duration as an impact factor. The risk-seeking factor is obtained by identifying the risky behaviour of decision-makers based on the expected utility theory. The risk duration impact factor is evaluated by analysing statistical information about high-risk excavations versus their lifetime. The novel MLCC design method is evaluated in real deep urban excavation projects and the method is applicable for design and yields sensible outputs.

Life cycle cost analysis of macro synthetic fibre reinforced concrete for railway sleeper applications

Over the last decade, restructuring of railway systems has resulted in infrastructure management assets demanding increased performance and reliability while adopting budget limits and reduced time available for maintenance. In fact, the current routine and major programmed maintenances are such capital-intensive activities that transport operating companies always attempt to optimise the operational procedures and related assets’ performances towards minimising the costs. Characteristically, the use of macro synthetic fibre reinforcement is proposed to improve the structural performances and service life of the sleeper component. Accordingly, this study addresses the economic feasibility of implementing macro synthetic fibre reinforced concrete (MSFRC) as an alternative material for railway sleeper applications. Through a life cycle costing (LCC) approach, the study evaluates the impact of different asset phases such as acquisition, operation and maintenance, and end-of-life towards a cost comparison of MSFRC with conventional sleeper materials. Hence, the most financially viable option is identified, although key economic parameters are varied to simulate future market values.

Performance fluctuations and evaluation of a piston type integrated high pressure pump-energy recovery device

The development of energy recovery device (ERD) is a decisive factor for the recent prevalence of reverse osmosis (RO) technology in the seawater desalination field. Unlike broadly studied large scale ERDs, the investigations of small scale ERDs are scarcely reported, especially on the performance fluctuations under variable operating conditions. Based on an authors’ exploratory research on a piston type integrated high pressure pump-energy recovery device (HPP-ERD), further performance exploitation of the HPP-ERD is conducted. With a constructed experiment platform, the influences of inlet seawater temperature, inlet seawater salinity, as well as the operating frequency on the performance of the HPP-ERD coupled with seawater reverse osmosis (SWRO) desalination system are investigated. The temperature and salinity of the inlet seawater are numerically correlated with the specific energy consumption (SEC) of the HPP-ERD. With the correlated equation, the marine hydrological data of two observatories acquired from a national authoritative database, and the annualized life cycle cost approach incorporated, annual performance assessment is proposed for an SWRO desalination system equipped with the HPP-ERD in the light of energy and economic indices. The study results indicate that the proposed HPP-ERD is competent under various operating conditions for SWRO desalination systems.

Universal water service delivery: Insights on what it takes from Ghana

AbstractAttainment of the government of Ghana's ambitious target of providing safe and reliable basic water services to all persons in Ghana by 2025 requires urgent need to unravel localized barriers to achieve universal access and sustain it. Using the Life Cycle Cost Approach, this paper provides a framework in policy planning and estimates the quantum of funds that needs to be injected into construction, operation, and maintenance of water facilities in order to achieve full water coverage in a district. Using participatory approaches, data were collected from Bongo, East Gonja, and Wa districts of Ghana. Data collection was facilitated by Community Water and Sanitation Agency employing the Resources, Infrastructure, Demand, and Access Strategic Planning Tool. Results show that the total cost of achieving full coverage is estimated at US$ 10,342,190, US$ 15,828,421, and US$ 10,111,616 for Bongo, East Gonja, and Wa East, respectively, in the implementation of water coverage and sustainability activities spanning 2017–2025. We suggest that sustainable water services for all requires more than capital inflows. Strong leadership commitment, bolstered institutions, improved monitoring, and evaluation as well as adequate human resources are critical to ensuring that capital investments translate into effective service delivery.

Economic Analysis of Transactions in the Energy Storage Power Market: A Life-Cycle Cost Approach

Aiming at the impact of energy storage investment on production cost, market transaction and charge and discharge efficiency of energy storage, a research model of energy storage market transaction economic boundary taking into account the whole life cycle cost was proposed. Firstly, a peak-valley filling time division method based on equal capacity is proposed, which effectively improves the peak-valley time division and the accuracy of ES should scene switch. On this basis, a control strategy of “off-time reuse” is proposed to give full play to the function of “one standby multi-purpose” of energy storage, which improves the energy storage utilization rate and economic benefits. Secondly, an economic boundary model based on the life-cycle cost of energy storage and the evolution function of energy storage cost is constructed and solved by improved genetic algorithm. Finally, the simulation results show that compared with mono-peak control, the UTILIZATION rate of ES is increased by 16.25% and the investment recovery life is shortened by 1.17 years with “off-time reuse” strategy. Compared with the fixed division method, the investment recovery life of “peak clipping and valley filling” period division method is shortened by 1.75 years. In 2022, compared with the critical value of 0.76 yuan/kWh for fixed charge-discharge efficiency and cost, the critical value of the life-cycle cost model is 0.8 yuan/kWh, with an error of up to 5.26%.

Life Cycle Assessment Comparison of Distinct Soil Stabilizations Methods: An Environmental and Cost Approach to the Soil Improvement

Dispersive soils became a worldwide major concern owing to its high susceptibility to erosion, which is responsible for ravines, tunnels, among others problems. Commonly, ordinary Portland cement or even hydrated lime are employed to solve the aforementioned drawbacks. Nonetheless, alternative treatments have been suggested to provide options to replace natural resources. Therefore, the present study aims to compare two distinct soil stabilization methods, namely, dispersive soil-hydrated lime and dispersive soil-ground waste glass-carbide lime through an environmental life cycle and life cycle cost approach. The proposed assessment was carried out according to life cycle inventories responsible to stabilize 1.0 m³ of the two distinct mixtures. Among the 18 impact categories evaluated in the environmental life cycle assessment, the alternative binder was less impacting than the traditional hydrated lime over the entire impact categories. Concerning to the cost approach, the traditional stabilization based on hydrated lime had an approximate total cost of US$ 12.02, whereas the alternative stabilization methodology a cost of US$ 39.58. Thereby, ground waste glass-carbide lime binder has potential to be known as an alternative environment friendly binder to soil stabilization, succeeding in both mechanical and environment performances but being unsuccessful in terms of costs until the present moment.

The valuation of buildings energy retrofitting: A multiple-criteria approach to reconcile cost-benefit trade-offs and energy savings

Directive 2018/844/EU promotes long-term renovation strategies to achieve the 2050 EU-wide energy and climate targets. As the building sector accounts for 40% of final energy consumption and 36% of CO2, buildings energy retrofitting and the valuation of related investments play a fundamental role in the successful implementation of the energy transition. The economic evaluation of buildings’ energy retrofit projects is usually performed by implementing the Life Cycle Cost approach. Nonetheless, due to increased social awareness and environmental concerns, homeowners may be willing to invest in more energy-efficient solutions, rather than in the least-cost solution. This paper aims to provide a valuation framework to identify cost-effective and cost-optimal strategies of intervention, which match technological innovation in buildings energy renovations with environmental concerns and social awareness. In detail, we complement the Life Cycle Cost method with the Net Present Value rule and determine the best retrofit project by implementing a two-criteria (i.e., reduction in primary energy consumption and increase in the present value of net benefits compared to the status quo), additive-value decision model. We also propose a graphical approach, which provides a straightforward identification of the best compromise solution between Net-Present-Value maximizing and energy-saving maximizing buildings’ energy retrofit projects. We tested the proposed approach on a real-world case study and found that it is less sensitive than other methodologies to uncertainty over discount rates and future energy prices.

Economic feasibility study of aerators in aquaculture using life cycle costing (LCC) approach

Selection of aerator is a very important aspect in aquaculture operations. The selected aerator must be economically efficient and should be able to fulfil the requirement of oxygen supply in the pond water. In the present study, economic feasibility of nine different types of aerators, namely, perforated pooled circular stepped cascade (PPCSC), pooled circular stepped cascade (PCSC), circular stepped cascade (CSC), paddle wheel (PWA), spiral aerator (SA), propeller-aspirator-pump (PAA), submersible (SUBA), impeller aerator (IA) and air-jet aerator (AJA) was assessed based on capitalization method, a life cycle costing (LCC) approach. The results revealed that the PPCSC aerator can be considered as the most suitable aerator when dissolved oxygen (DO) content in the pond water is less than equal to 3 mg/L, and pond water volume (V) is less than 2100 m3. In other situations, mostly when pond water volume is more, IA proves to be the most suitable aerator, followed by PWA, PPCSC, and other available aerators. The sensitivity analysis conducted by using varying stocking density and capital cost also showed the same trend with regard to selection of aerators. This life cycle costing approach for selection of aerator can be implemented for any types of cultured species at any prevailing environmental conditions.

Alternative seagrass wrack management practices in the circular bioeconomy framework: A life cycle assessment approach

Despite providing important ecological functions, seagrass accumulation causes environmental and economic issues, including eutrophication and tourism reduction. Nowadays, seagrass wrack is commonly removed from the beaches and landfilled, which is considered the least desirable practice according to the European Union (EU) Waste Framework Directive. In this study, different management strategies for seagrass valorisation, including anaerobic digestion (AD), composting and ecological restoration, were considered using a life cycle assessment (LCA) perspective. The aim of the work was to evaluate more ecological and economic alternatives to landfill and to provide a robust evaluation method for public and private companies. An economic assessment was subsequently conducted, considering both direct and indirect impacts with a life cycle costing (LCC) approach. A selected beach located in the Northeast Mediterranean Sea was considered as a relevant case-study. The environmental impacts of the seagrass management scenarios were evaluated with the method ReCiPe 2016H, using both midpoint and endpoint levels. LCA results showed that ecological restoration and AD were the best alternatives in terms of environmental performances because of biogas production used as a renewable energy source. The impacts of the alternative management strategies were significantly lower than the current landfill strategy, -70% considering the categories of human health, ecosystems and resources, and -95% considering global warming potential category. The LCC analysis proved that composting was the best alternative (NPV > 1.27 M€), due to lower operating costs and higher fertilizer value. The obtained results can help beach management companies and public administrations to select the best operational strategies to reduce the environmental and economic impact of seagrass collection and treatment.

A systematic and critical review of life cycle approaches to assess circular economy pathways in the agri-food sector

This study provides a literature review of life cycle approaches used to assess circular economy (CE) pathways in the agri-food sector. The scope of this review is to understand how and how much the LC-based analysis is useful to evaluate if CE strategies are more sustainable than linear/traditional economic models in agri-food production systems. To carry out the systematic and critical literature review the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) protocol was employed. The literature search was performed employing scientific databases (Scopus and Web of Science). The results highlight that 52 case studies out of 84 (62% of the total) use stand-alone life cycle assessment (LCA) to evaluate the benefits/impacts of circular economy strategies. Only eight studies (9.5%) deal with the life cycle costing (LCC) approach combined with other analyses, while no paper deals with the social life cycle assessment (S-LCA) methodology. We argue that experts in life cycle methodologies must strive to adopt some key elements to ensure that the results obtained fit perfectly with the measurements of circularity and that these can even be largely based on a common basis.

The Implementation Factors of Information and Communication Technology in the Life Cycle Costs of Buildings

Life cycle cost management is an integral part of buildings construction. The life cycle cost approach can be considered an objective approach because it considers all life cycles of buildings. Information and communication technology is one of the critical factors for the success of construction projects. Several studies point to the importance of information and communication technology use in life cycle cost management. Generally, information and communication technology can be helpful in the cost management process of buildings. However, few implementation factors of information and communication technology are used in the life cycle cost management of buildings. The research assumes that the most critical implementation factor is the investment cost for information and communication technologies used in cost management during the life cycle. The relative importance index method was used to evaluate and quantify the final rank of implementation factors. The Kruskal–Wallis test was used to confirm or reject research results that were statistically significant.

Sustainable Agri-Food Processes and Circular Economy Pathways in a Life Cycle Perspective: State of the Art of Applicative Research

This study aims at providing a systematic and critical review on the state of the art of life cycle applications from the circular economy point of view. In particular, the main objective is to understand how researchers adopt life cycle approaches for the measurement of the empirical circular pathways of agri-food systems along with the overall lifespan. To perform the literature review, the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) protocol was considered to conduct a review by qualitative synthesis. Specifically, an evaluation matrix has been set up to gather and synthesize research evidence, by classifying papers according to several integrated criteria. The literature search was carried out employing scientific databases. The findings highlight that 52 case studies out of 84 (62% of the total) use stand-alone life cycle assessment (LCA) to evaluate the benefits/impacts of circular economy (CE) strategies. In contrast, only eight studies (9.5%) deal with the life cycle costing (LCC) approach combined with other analyses while no paper deals with the social life cycle assessment (S-LCA) methodology. Global warming potential, eutrophication (for marine, freshwater, and terrestrial ecosystems), human toxicity, and ecotoxicity results are the most common LCA indicators applied. Only a few articles deal with the CE assessment through specific indicators. We argue that experts in life cycle methodologies must strive to adopt some key elements to ensure that the results obtained fit perfectly with the measurements of circularity and that these can even be largely based on a common basis.

Optimal Renovation Strategies through Life-Cycle Analysis in a Pilot Building Located in a Mild Mediterranean Climate

The 2030 climate and energy framework includes EU-wide targets and policy objectives for the period 2021–2030 of (1) at least 55% cuts in greenhouse gas emissions (from 1990 levels); (2) at least 32% share for renewable energy; and (3) at least 32.5% improvement in energy efficiency. In this context, the methodology of the cost-optimal level from the life-cycle cost approach has been applied to calculate the cost of renovating the existing building stock in Europe. The aim of this research is to analyze a pilot building using the cost-optimal methodology to determine the renovation measures that lead to the lowest life-cycle cost during the estimated economic life of the building. The case under study is an apartment building located in a mild Mediterranean climate (Castellon, SP). A package of 12 optimal solutions has been obtained to show the importance of the choice of the elements and systems for renovating building envelopes and how energy and economic aspects influence this choice. Simulations have shown that these packages of optimal solutions (different configurations for the building envelope, thermal bridges, airtightness and ventilation, and domestic hot water production systems) can provide savings in the primary energy consumption of up to 60%.