Life cycle energy assessment of a typical office building in Thailand

2009 ◽  
Vol 41 (10) ◽  
pp. 1076-1083 ◽  
Author(s):  
Oyeshola F. Kofoworola ◽  
Shabbir H. Gheewala
Keyword(s):  
Life Cycle ◽  
Office Building ◽  
Energy Assessment

ENVIRONMENTAL DAMAGE AND SAVING BENEFIT OF EXTERNAL SHADING DEVICES VIA PHOTOVOLTAIC (PV) ENERGY GENERATION

2016 ◽  
Vol 11 (3) ◽  
pp. 95-109 ◽  
Author(s):  
Svetlana Pushkar
Keyword(s):  
Life Cycle ◽  
Environmental Design ◽  
Energy Generation ◽  
Office Building ◽  
Environmental Damage ◽  
Life Cycle Assessments ◽  
Energy Assessment ◽  
Shading Devices ◽  
Building Operation ◽  
Major Reduction

The aim of the study is to evaluate both environmental damage and saving benefit in selecting building shading devices. The environmental damage from the production and construction (P&C) of shading devices is evaluated. The saving benefit, i.e., decreasing building operation energy (OE), due to installing shading devices is evaluated. A simple office building module is used. The external shading devices are constructed from concrete-based external shading devices and aluminum-based light shelf devices. Energy design via Life Cycle Energy Assessment (LCEA) and environmental design via Life Cycle Assessments (LCA) are applied. Environmental design is performed when PV energy generation is used. It was found that in energy design, 40% of building OE saving benefit is required to compensate energy needed for the P&C of shading devices. In environmental design, 100% of the building OE saving benefit is required to compensate for environmental damage stemming from the P&C of shading devices. It was concluded that in energy design, in addition to OE, P&C energy should be evaluated. In environmental design, due to a major reduction in the OE saving benefit, the importance of the P&C environmental damage increased. Environmental design cannot be replaced with energy design when PV energy generation is assumed for building OE needs.

scholarly journals A Comprehensive Framework for Standardising System Boundary Definition in Life Cycle Energy Assessments

Buildings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 230
Author(s):  
Hossein Omrany ◽  
Veronica Soebarto ◽  
Jian Zuo ◽  
Ruidong Chang
Keyword(s):  
Life Cycle ◽  
Energy Use ◽  
Embodied Energy ◽  
Building Energy Efficiency ◽  
System Boundary ◽  
Policy Makers ◽  
Energy Assessment ◽  
Boundary Definition ◽  
Comprehensive Framework

This paper aims to propose a comprehensive framework for a clear description of system boundary conditions in life cycle energy assessment (LCEA) analysis in order to promote the incorporation of embodied energy impacts into building energy-efficiency regulations (BEERs). The proposed framework was developed based on an extensive review of 66 studies representing 243 case studies in over 15 countries. The framework consists of six distinctive dimensions, i.e., temporal, physical, methodological, hypothetical, spatial, and functional. These dimensions encapsulate 15 components collectively. The proposed framework possesses two key characteristics; first, its application facilitates defining the conditions of a system boundary within a transparent context. This consequently leads to increasing reliability of obtained LCEA results for decision-making purposes since any particular conditions (e.g., truncation or assumption) considered in establishing the boundaries of a system under study can be revealed. Second, the use of a framework can also provide a meaningful basis for cross comparing cases within a global context. This characteristic can further result in identifying best practices for the design of buildings with low life cycle energy use performance. Furthermore, this paper applies the proposed framework to analyse the LCEA performance of a case study in Adelaide, Australia. Thereafter, the framework is utilised to cross compare the achieved LCEA results with a case study retrieved from literature in order to demonstrate the framework’s capacity for cross comparison. The results indicate the capability of the framework for maintaining transparency in establishing a system boundary in an LCEA analysis, as well as a standardised basis for cross comparing cases. This study also offers recommendations for policy makers in the building sector to incorporate embodied energy into BEERs.

SIMULATION BASED COMPLEX ENERGY ASSESSMENT OF OFFICE BUILDING FENESTRATION

2010 ◽  
Vol 16 (3) ◽  
pp. 345-351 ◽  
Author(s):  
Violeta Motuzienė ◽  
Egidijus Saulius Juodis
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Energy Demand ◽  
Office Building ◽  
Negative Effects ◽  
Energy Assessment ◽  
The North ◽  
Complex Evaluation ◽  
Lighting Energy ◽  
Glazed Facade

The number of office buildings with highly fenestrated facades is currently increasing in Lithuania and neighboring countries. Highly fenestrated facades reduce energy consumption for lighting and simultaneously increase energy consumption for heating, cooling, air conveying and may cause thermal and visual discomfort. Pursuing to reduce negative effects of the highly glazed facade, special glasses are frequently used. However, such windows usually increase demand for lighting energy. Therefore, when making early decisions about glazing the building, it is important to have a complex evaluation of energy demand related to the specific case. The paper presents the results of analysis made using energy simulation tools. The obtained results have shown that when shading is not applied, the north is the most energy efficient orientation to glazing for an air conditioned office building in cool climate zones like Lithuania. The most energy efficient window‐to‐wall ratios (WWR) for the south, east and west oriented façade are 20%, whereas for the north it makes 20–40%. However, such WWR values do not satisfy standard requirements for day lighting. Santrauka Pastaraisiais metais Lietuvoje ir kaimyninese šalyse daugeja administracines paskirties pastatu, kuriu dauguma išoriniu atitvaru yra skaidrios. Didesnis istiklinimo plotas lemia mažesnius energijos poreikius apšvietimui, tačiau didina šildymo ir vesinimo sistemu energijos poreikius, sukelia šilumini bei vizualini diskomforta. Neigiamai dideliu skaidriu atitvaru itakai sumažinti naudojami tamsinti ir kitu specialiu charakteristiku stiklai, tačiau tai savo ruožtu didina energijos poreiki apšvietimui. Todel, priimant sprendimus del pastato istiklinimo, svarbu prieš tai kompleksiškai išnagrineti konkretaus sprendimo itaka pastato energijos poreikiams. Straipsnyje pateikiama modeliuojant gautu rezultatu analize. Rezultatai parode, kad vesaus klimato šalyse, kurioms priklauso ir Lietuva, kondicionuojamu administraciniu pastatu fasadu, kai nenaudojamos apsaugos nuo saules priemones, energiškai efektyviausias istiklinimas yra i šiaures puse. Energiškai efektyviausias santykinis fasado istiklinimo plotas pietines, rytines ir vakarines orientacijos fasadams yra 20 %, o šiaurines ‐ 20–40 %. Tačiau tokie istiklinimo plotai neatitinka norminiu natūralaus apšvietimo reikalavimu.

scholarly journals Minimizing delivered energy and life cycle cost using Graphical script: An office building retrofitting case

2020 ◽  
Vol 268 ◽  
pp. 114929 ◽  
Author(s):  
Mehrdad Rabani ◽  
Habtamu Bayera Madessa ◽  
Omid Mohseni ◽  
Natasa Nord
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Office Building

Life cycle energy consumption and CO2 emission of an office building in China

2011 ◽  
Vol 17 (2) ◽  
pp. 105-118 ◽  
Author(s):  
Huijun J. Wu ◽  
Zengwei W. Yuan ◽  
Ling Zhang ◽  
Jun Bi
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Co2 Emission ◽  
Office Building

scholarly journals Systematic Simplified Simulation Methodology for Deep Energy Retrofitting Towards Nze Targets Using Life Cycle Energy Assessment

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3038 ◽  
Author(s):  
José Sánchez Ramos ◽  
MCarmen Guerrero Delgado ◽  
Servando Álvarez Domínguez ◽  
José Luis Molina Félix ◽  
Francisco José Sánchez de la Flor ◽  
...  
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Energy Savings ◽  
Residential Building ◽  
Energy Performance ◽  
Simulation Tools ◽  
Energy Assessment ◽  
Energy Efficiency Improvement ◽  
The Difference ◽  
Reduction Of Energy Consumption

The reduction of energy consumption in the residential sector presents substantial potential through the implementation of energy efficiency improvement measures. Current trends involve the use of simulation tools which obtain the buildings’ energy performance to support the development of possible solutions to help reduce energy consumption. However, simulation tools demand considerable amounts of data regarding the buildings’ geometry, construction, and frequency of use. Additionally, the measured values tend to be different from the estimated values obtained with the use of energy simulation programs, an issue known as the ‘performance gap’. The proposed methodology provides a solution for both of the aforementioned problems, since the amount of data needed is considerably reduced and the results are calibrated using measured values. This new approach allows to find an optimal retrofitting project by life cycle energy assessment, in terms of cost and energy savings, for individual buildings as well as several blocks of buildings. Furthermore, the potential for implementation of the methodology is proven by obtaining a comprehensive energy rehabilitation plan for a residential building. The developed methodology provides highly accurate estimates of energy savings, directly linked to the buildings’ real energy needs, reducing the difference between the consumption measured and the predictions.

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