scholarly journals Energy Renovation versus Demolition and Construction of a New Building—A Comparative Analysis of a Swedish Multi-Family Building

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2218 ◽  
Author(s):  
Lina La Fleur ◽  
Patrik Rohdin ◽  
Bahram Moshfegh
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Energy Performance ◽  
Optimal Energy ◽  
Heated Floor ◽  
New Construction ◽  
Family Building ◽  
1960S And 1970S ◽  
Internal Volume ◽  
The 1960S

This study addresses the life cycle costs (LCC) of energy renovation, and the demolition and construction of a new building. A comparison is made between LCC optimal energy renovations of four different building types with thermal performance, representing Swedish constructions from the 1940s, 1950s, 1960s, and 1970s, as well as the demolition of the building and construction of a new building that complies with the Swedish building code. A Swedish multi-family building from the 1960s is used as a reference building. LCC optimal energy renovations are identified with energy saving targets ranging between 10% and 70%, in addition to the lowest possible life cycle cost. The analyses show that an ambitious energy renovation is not cost-optimal in any of the studied buildings, if achieving the lowest LCC is the objective function. The cost of the demolition and construction of a new building is higher compared to energy renovation to the same energy performance. The higher rent in new buildings does not compensate for the higher cost of new construction. A more ambitious renovation is required in buildings that have a shape factor with a high internal volume to heated floor area ratio.

scholarly journals An Approach to Improve Energy and Cost Performance of a Social Housing Archetype in Cold Climate Region

2019 ◽  
Vol 111 ◽  
pp. 03065
Author(s):  
Yiğit Yılmaz ◽  
Burcu Çiğdem Yılmaz
Keyword(s):  
Life Cycle ◽  
Physical Properties ◽  
Social Housing ◽  
Life Cycle Cost ◽  
Energy Performance ◽  
Cold Climate ◽  
Temperate Climate ◽  
Base Case ◽  
Climate Region ◽  
Thermo Physical Properties

The importance of building energy performance has been substantially increasing in the last decades due to the global warming. Therefore, buildings within the existing stock and the new buildings are encouraged to achieve the energy performance restrictions and efficiency levels. In this context, a social housing archetype (Harct), which is constructed in each climate region of Turkey with a common design approach for temperate climate region, is evaluated as a base case to improve the energy performance for the cold climate region by the optimization of the life cycle cost (LCC). It is, namely, aimed to not only improve the energy performance of the archetype but also to ensure optimal cost efficiency as significant criterion. It is focused to optimize the façades of the Harct in terms of window width, and optic and thermo-physical properties of the façade with determining the efficient insulation thickness level for exterior walls and efficient glazing types for windows. Firstly, façade design is analysed to find out the minimum and maximum windows’ widths to achieve the optimal window sizes. Secondly, optic and thermo-physical properties and cost data of the opaque and transparent façade elements have been designated among the market products in accordance with the current regulations. Energy model of the building has been run by Energy Plus simulation tool, in order to integrate it with GenOpt for optimization. Optimization was performed to carry out efficient frontier cases. The results were evaluated from life cycle cost (LCC) and energy efficiency point of view to highlight the cost optimal point

Stochastic Multi-Objective Optimization-Based Life Cycle Cost Analysis for New Construction Materials and Technologies

2019 ◽  
Vol 2673 (11) ◽  
pp. 466-479
Author(s):  
Jingqin Gao ◽  
Kaan Ozbay ◽  
Hani Nassif ◽  
Onur Kalan
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Construction Materials ◽  
Optimal Investment ◽  
Management Decision ◽  
Life Cycle Cost Analysis ◽  
Investment Strategies ◽  
New Materials ◽  
New Construction

The sustainability of transportation infrastructure depends on the adoption of new construction materials and technologies that can potentially improve performance and productivity. However, most agencies would like to evaluate these new materials and technologies at both the project and network levels before replacing the traditional ones. It also remains a challenge to reliably estimate the costs and lifetime performance of new construction materials and technologies because of limited implementation data. To address these issues, this paper presents a comprehensive bottom-up methodology based on Life Cycle Cost Analysis (LCCA) to integrate project- and network-level analysis that can fast-track the acceptance of new materials or technologies. Hypothesized improvement rates are applied to the deterioration functions of existing materials to represent the expected improved performance of a new material compared with a conventional material with relatively similar characteristics. This new approach with stochastic treatment allows us to probabilistically evaluate new materials with limited data for their future performance. Feasible maintenance and rehabilitation schedules are found for each facility at the project level and near-optimal investment strategies are identified at the network level by using a metaheuristic evolutionary algorithm while satisfying network-wide constraints. This provides an effective solution to many issues that have not been fully addressed in the past, including the trade-off between multiple objectives, effects of time, uncertainty, and outcome interpretation. A hypothetical bridge deck system from New Jersey’s bridge inventory database is used to demonstrate the applicability of the proposed methodology in constructing a planning and management decision-support procedure.

scholarly journals Research in Sustainable Energy Systems at the Department of Management and Engineering during the First 15 Years of 2000

2021 ◽  
Vol 11 (24) ◽  
pp. 12155
Author(s):  
Giacomo Bagarella ◽  
Filippo Busato ◽  
Francesco Castellotti ◽  
Andrea D’Ascanio ◽  
Renato Lazzarin ◽  
...  
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Energy Savings ◽  
Energy Performance ◽  
Simulation Software ◽  
Sustainable Technologies ◽  
Island Effect ◽  
Building Insulation ◽  
Sustainable Energy Systems ◽  
The University

At the Department of Management and Engineering (DTG) of the University of Padova (Italy), the research team led by Prof. Renato Lazzarin, formed by the authors, worked during the first fifteen years of the millennium on different topics focused on sustainable technologies for energy production and utilization in buildings. Both experimental and theoretical/modeling studies were carried out, all sharing the evaluation of energy performance and sustainability: From the life cycle assessment and life cycle cost of building insulation materials in Italy, to the measurement of energy performance of a green roof, to the experimental measurement of different photovoltaic/thermal modules, to the development of a simulation software for direct and indirect evaporative cooling techniques, to the evaluation of different energy savings techniques for refrigeration and air conditioning in supermarkets, to an extensive analysis of the urban heat island effect in the city of Padova. The paper summarizes the main theoretical and experimental approaches, providing the methods adopted in each line of research. The main results of the studies conducted during the fifteen-year period are described and commented on, some of which were a well-established reference for the following literature.

scholarly journals The Opt-In Revolution? Contraception and the Gender Gap in Wages

2012 ◽  
Vol 4 (3) ◽  
pp. 225-254 ◽  
Author(s):  
Martha J Bailey ◽  
Brad Hershbein ◽  
Amalia R Miller
Keyword(s):  
Life Cycle ◽  
Gender Gap ◽  
Career Paths ◽  
Hourly Wage ◽  
Capital Investments ◽  
The Us ◽  
Human Capital Investments ◽  
1960S And 1970S ◽  
The 1960S

Decades of research on the US gender gap in wages describes its correlates, but little is known about why women changed their career paths in the 1960s and 1970s. This paper explores the role of “the Pill” in altering women's human capital investments and its ultimate implications for life-cycle wages. Using state-by-birth-cohort variation in legal access, we show that younger access to the Pill conferred an 8 percent hourly wage premium by age 50. Our estimates imply that the Pill can account for 10 percent of the convergence of the gender gap in the 1980s and 30 percent in the 1990s. (JEL J13, J16, J31, J71, J24)

Life cycle costs and environmental impacts of a nearly zero-energy detached house

2013 ◽  
Vol 4 (2) ◽  
pp. 163-169
Author(s):  
Zs. Szalay ◽  
T. Csoknyai
Keyword(s):  
Life Cycle ◽  
Environmental Impacts ◽  
Life Cycle Cost ◽  
Energy Demand ◽  
Building Design ◽  
Energy Performance ◽  
High Energy ◽  
Zero Energy ◽  
Detached House ◽  
Zero Energy Buildings

Abstract The recast of the Energy Performance Building Directive contains a new article about the need to increase the number of buildings which go beyond current national requirements, and to draw up national plans for increasing the number of nearly zero-energy buildings (nZEB) with the final target that by 2020 all new buildings shall be nearly-zero energy. Nearly zero-energy buildings are buildings with a very high energy performance, where the remaining low energy demand can be supplied to a significant extent by renewable energy. In this paper, a detached house complying with the proposed Hungarian nZEB requirements is analysed. The life cycle cost and life cycle environmental impacts of the building are assessed for various building service systems to optimise the building design.

scholarly journals Energy Performance Analysis of Building Envelopes

2021 ◽  
Vol 11 (3) ◽  
pp. 196-206
Author(s):  
Ibrahim Motawa ◽  
Asser Elsheikh ◽  
Esraa Diab
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Life Cycle Cost ◽  
Energy Performance ◽  
Building Envelopes ◽  
Heating And Cooling ◽  
Main Challenge ◽  
Sustainable Materials ◽  
High Level ◽  
Total Life

Abstract The building sector has a high level of energy consumption caused mainly by the buildings heating and cooling energy demands to satisfy indoor comfort requirements. Reducing both the amount of energy consumed and the life cycle cost is a main challenge for the construction of buildings. It is evident that sustainable materials have low environmental impacts and need low consumption of energetic resources in addition to their durability and recyclability. Therefore, this research aims to test different sustainable materials available in Egypt for the construction of building envelopes that include local stones “Marble and Limestone” and insulation materials “Polyurethane- expanded and Extruded polystyrene (XPS) foam” in order to achieve savings in energy and total life cycle cost. The simulation tests were conducted through Design Builder software. The results aim to provide solutions for building designers to achieve energy-efficiency and costeffective design. The proposed alternatives showed a significant reduction in energy consumption by up to 62% and the total life cycle costs significantly reduced by up to 45.8%.

Income Distribution, Consumption, and Economic Growth in Italy

2019 ◽  
Vol 51 (5) ◽  
pp. 867-900
Author(s):  
Antonella Rancan
Keyword(s):  
Economic Growth ◽  
Life Cycle ◽  
Income Distribution ◽  
Strong Influence ◽  
Income Redistribution ◽  
Political Debate ◽  
Savings Behavior ◽  
Keynesian Economics ◽  
1960S And 1970S ◽  
The 1960S

The paper discusses Modigliani, Brumberg, and Ando’s life cycle hypothesis and its difficult acceptance in Italy over the 1960s and 1970s. The increasing attention to the effects of income redistribution on consumption coupled with the strong influence that post-Keynesian economics exercised on the theoretical and political debate of that time led to a widespread preference of Kaldor’s theory as over the life cycle as the best representation of Italian savings behavior.

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