Calculation of optimum insulation thickness of external walls in residential buildings by using exergetic life cycle cost assessment method: Case study for Turkey

2019 ◽  
Vol 38 (6) ◽  
Author(s):  
Sengul Guven
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Residential Buildings ◽  
Assessment Method ◽  
Cost Assessment ◽  
Insulation Thickness ◽  
Optimum Insulation Thickness

Life-cycle cost analysis of building wall and insulation materials

2019 ◽  
Vol 43 (5) ◽  
pp. 428-455 ◽  
Author(s):  
Dileep Kumar ◽  
Patrick X.W. Zou ◽  
Rizwan Ahmed Memon ◽  
MD Morshed Alam ◽  
Jay G Sanjayan ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Life Cycle ◽  
Life Cycle Cost ◽  
Construction Materials ◽  
Building Construction ◽  
Life Cycle Cost Analysis ◽  
Insulation Materials ◽  
Insulation Thickness ◽  
Wall Materials ◽  
Optimum Insulation Thickness

Heat transfer through building opaque envelope is responsible for approximately half of the total heat loss and gain to and from the surroundings. Therefore, insulation materials are commonly used in the building envelope to reduce the heat transfer. Recently, lightweight wall materials with lower thermal conductivity are used in construction along with the commonly used materials such as heavy concrete and earthen materials. In this perspective, there is a need to understand the optimum insulation thickness for different types of building construction materials to minimize unnecessary usage of insulation materials. This study investigated the optimum insulation thickness for different construction materials following a life-cycle approach, where an analytical optimization methodology based on the degree-days method and life-cycle cost analysis was used. In total, 4 insulation materials and 15 building construction materials were considered in the optimization study. The objective function was to minimize life-cycle cost corresponding to the decision variables including insulation thickness and the thermal conductivity of insulation and wall materials. The results showed that the use of insulation in lightweight wall materials is not economically feasible because of their negligible cost-saving potential (below US$2.5/m2-year). However, the walls with heavy concrete and earthen materials that have high thermal mass must be insulated due to their highest cost-saving potential (US$14–26.39/m2-year).

scholarly journals Scenario-based life-cycle cost assessment to support sustainable investment in rural communal sanitation facilities: the application to a school-based sanitation facility

2021 ◽  
Author(s):  
N. M. Koseoglu ◽  
R. Ellis ◽  
D. Biswas
Keyword(s):  
Life Cycle ◽  
Low Income ◽  
Life Cycle Cost ◽  
External Support ◽  
Cost Assessment ◽  
Government School ◽  
Sanitation Facility ◽  
School Based ◽  
Sanitation Infrastructure

Abstract Despite decades of investment in widening access to improved sanitation, much of the world still lacks access to functional sanitation facilities. Through much of the Global South, toilets are inoperable and often abandoned. Failure to understand and account for the whole-life cost of sanitation infrastructure, as well as the interplay between context-specific socio-economic determinants, is one explanation for this reduction in the service life of shared sanitation infrastructure. This issue is especially salient in school-based and communal facilities in middle- to low-income countries. Drawing on a case study of a sanitation facility in a government school in rural south India, we explore the relationship between user value, community-based capacity, and external support in determining the costs of operating and maintaining sanitation facilities over their lifetime. We develop a scenario-based life-cycle cost assessment methodology to examine the relational impact of these determinants on the ‘real’ cost of shared sanitation infrastructure. The analysis concludes that investment and interventions that stimulate demand and enhance the capacity of a community are the most cost-effective options for ensuring the sustainability of sanitation facilities in our case study site. We then reflect on the applicability and limitations of these findings for a wider range of communal sanitation facilities.

Complex Assessment of Resource-Saving Solutions Efficiency for Residential Buildings Based on Sustainability Theory

2018 ◽  
Vol 931 ◽  
pp. 870-876 ◽  
Author(s):  
Svetlana G. Sheina ◽  
Evgenia N. Minenko ◽  
Katarina S. Sakovskaya
Keyword(s):  
Life Cycle ◽  
Resource Use ◽  
Life Cycle Cost ◽  
Housing Stock ◽  
Residential Buildings ◽  
Assessment Method ◽  
Economic Effects ◽  
Resource Saving ◽  
Optimal Resource ◽  
Sustainability Theory

This article addresses the issue of energy efficiency in the housing stock of Russian cities. It suggests that the improvement of energy and resource use in the residential houses during their life cycle will promote the transition of Russian cities on the way to sustainable future. The authors of the article present the new assessment method of efficiency the resource saving solutions in the housing stock. This method is based on evaluation of the ecological, environmental and economic effects of realization the resource saving solutions in residential buildings, taking into account the building’s life cycle cost. For this purpose, the authors suggest to use the integrated indicator of sustainability, achieved by the building, through the implementation of different resource saving solutions. The article provides the example of application of the proposed method for selecting the optimal resource saving measures among some different variants planned for realization during the overhaul of the building located in Rostov-on-Don.

Sign in / Sign up

Export Citation Format

Share Document