Retrofit guidelines towards the achievement of net zero energy buildings for office buildings in Brasilia

Costa, João Francisco Walter; Amorim, Cláudia Naves David; Cronemberger, Joára

doi:10.1016/j.jobe.2020.101680

Cited by 25 publications

(19 citation statements)

References 23 publications

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“…A case study of a retrofitted existing building in Brazil showed that the proposed guidelines and strategies can achieve net-zero energy buildings. Retrofitting was performed in many aspects of the building, such as air conditioning, lighting, office equipment, and installed photovoltaic (PV) systems, resulting in a reduction of energy consumption by up to 46% [17]. To retrofit residential buildings on an urban scale, a data-driven methodology was proposed as a generalized approach.…”

Section: Introductionmentioning

confidence: 99%

Retrofitted Existing Residential Building Design in Energy and Economic Aspect According to Thailand Building Energy Code

et al. 2021

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Electrical energy usage in buildings is a challenging issue because many old buildings were not originally built to achieve energy efficiency. Thus, retrofitting old buildings to net-zero buildings can benefit both the owner and electric utilities. In this study, the BEC (building energy code) software was used to evaluate energy aspects of retrofitted buildings in compliance with Thailand’s building energy code to achieve a net-zero energy building. In addition, economic aspects were also studied to verify the feasibility for a project’s owner to invest in a retrofitted existing building. An existing residential building in Thailand was used as a case study. The results in terms of energy after retrofitting existing buildings into net-zero energy buildings show that the total energy consumption can be reduced by 49.36%. From an economic perspective, the investment cost for a retrofitted building can be compensated by energy saving in terms of discounted payback period (DPP) for approximately 4.36 years and has an IRR (internal rate of return) value of 19.23%. This result evidences the potential in both energy and economy for a project’s owner to invest in a retrofitted existing building in compliance with the building code, with potential for implementation with benefits on both electrical utilities and the project’s owner.

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Section: Introductionmentioning

confidence: 99%

Retrofitted Existing Residential Building Design in Energy and Economic Aspect According to Thailand Building Energy Code

et al. 2021

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“…Such existing full-glazing high-rise buildings might need to undergo strong retrofit processes. In this matter, a reference retrofit framework to achieve NZEB has been recently proposed by [85], where an office building was used as a case study. Here, beginning again with passive strategies where the surface-to-volume ratio (A/V), building envelope area, height, window shading, window-wall ratio (WWR), glass solar heating gain coefficient (SHGC), light transmissivity, and natural ventilation were the most-discussed variables regarding energy efficiency.…”

Section: Discussionmentioning

confidence: 99%

Review of Zero Energy Building Concept-Definition and Developments in Latin America: A Framework Definition for Application in Panama

2021

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In recent decades, European countries have developed concepts, definitions, and construction technologies for Zero Energy Building (ZEB) that are effective and correspond to their specific climates. Latin American countries are still trying to find adequate solutions which respond to the local climatic, cultural, social, technical, and economic context. As such, this paper aims to establish the basis of the minimum energy efficiency and the renewable threshold for the definition of ZEB in order to better understand the application in Panama, based on assessing the energy regulations implemented in Panama. To achieve this aim, a review concentrated on the concept-definition and implementation adopted by Latin American countries is presented first before the paper converges into defining a framework for application in Panama. Finally, a case-study-based theoretical framework proposing a ZEB definition for Panama is discussed. The results of this study showed a net primary energy balance, of which the range falls into a plus energy building definition, indicating that all of the cases studied could supply their electricity needs using Photovoltaic generation. All dwellings studied have the potential to become a plus energy building, depending on the available roof surface area. Finally, a strengths, weaknesses, opportunities and threats analysis is presented in order to assess and support the introduction of such a ZEB definition and framework.

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“…Lighting upgrades are the most common retrofit measure in commercial buildings, largely due to their cost-effectiveness and ease of implementation [13]. A number of tools and guides have been developed to assist building owners, designers and other stakeholders [9,[14][15][16]. However, studies show that the overall retrofit rate is still relatively low, at only about 2.2% of total floor space annually in the U.S. [3].…”

Section: Motivation and Contextmentioning

confidence: 99%

Energy Efficiency Package for Tenant Fit-Out: Laboratory Testing and Validation of Energy Savings and Indoor Environmental Quality

et al. 2020

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Approximately 40% of the total U.S. office floor space of 1.5 billion sq.m (16 billion sq.ft.) is leased space occupied by tenants. Tenant fit-out presents a key opportunity to incorporate energy efficiency within the real estate business cycle. We designed a package of energy efficiency measures tailored to the scope of a tenant fit-out. This tenant fit-out package (TFP) includes advanced lighting and heating, ventilating and air-conditioning (HVAC) controls as core measures, with ceiling fans, automated shading, and plug load controls as additional optional measures. We conducted laboratory testing of six configurations of the package to evaluate energy savings, indoor environmental quality, and identify installation, commissioning, and operational issues. Combined savings for HVAC, lighting, and plug loads ranged from 33–40%. Lighting savings ranged from 69–83%, and HVAC savings from 20–40%. The laboratory testing also revealed some minor but tractable challenges with installation and commissioning of HVAC controls. Overall, the results demonstrate that significant savings can be realized in existing office buildings by incorporating relatively low-risk, proven measures at the time of a tenant fit-out.

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Retrofit guidelines towards the achievement of net zero energy buildings for office buildings in Brasilia

Cited by 25 publications

References 23 publications

Retrofitted Existing Residential Building Design in Energy and Economic Aspect According to Thailand Building Energy Code

Retrofitted Existing Residential Building Design in Energy and Economic Aspect According to Thailand Building Energy Code

Review of Zero Energy Building Concept-Definition and Developments in Latin America: A Framework Definition for Application in Panama

Energy Efficiency Package for Tenant Fit-Out: Laboratory Testing and Validation of Energy Savings and Indoor Environmental Quality

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