Overall Environmental Modelling of Newly Designed Curtain Wall Façade Configurations

Self Cite

The purpose of this paper is to provide a review of developments in Korea in relation to its energy consumption and sustainable development policies and progress in achieving its energy targets as given by the Building Energy Codes. Building insulation and passive building technologies are also reviewed for achieving passive house standards by 2017 and zero-energy or near zero-energy buildings (nZEB) by 2025 in Korea, and to identify strategies to further reduce usage of primary energy and to achieve energy efficiency targets. A defining feature of a sustainable building is its ability to reduce significantly its environmental impacts and its embodied energy and greenhouse gas emissions over its whole life, including use of natural resources and releases of pollutants, to promote reuse and recycling of materials and sustainable development of buildings whilst ensuring the building satisfy the indoor environmental quality requirements for occupants. Passive technologies include the use of natural ventilation, energy storage such as using phase change materials (PCM) and high thermal mass structure, high energy efficiency windows and lighting and maximizing daylighting and use of renewable energy technologies. Technologies for refurbishment of building envelopes, windows and ventilation systems are reviewed to improve and upgrade the energy efficiency of existing buildings as well as focusing on new builds. The various options for heating, ventilating, cooling and air-conditioning of buildings are also discussed. Green Buildings and Energy Efficiency Labels and Standards should have a pertinent role to affect energy efficiency measures in building developments.

Section: Building Design Criteria For Energy Savingmentioning

confidence: 99%

Sustainable development and requirements for energy efficiency in buildings – The Korean perspectives

Kim

Yu²

2018

Self Cite

“…1 As the amount of direct sunlight entering the room increases, unexpected problems could occur, including discomfort of occupants from a glare and excessive energy consumption in summer as a result of a high cooling load due to the incoming daylight. 2 Because of these problems, it is essential to install shading devices such as roller shades or venetian blinds in an office building which uses curtain walls to block excessive direct sunlight.…”

Section: Introductionmentioning

confidence: 99%

“…(1) There is no other choice but to choose curtain walls because most modern buildings are steel frame-structured, (2) introduction of available daylight without causing a discomforting glare to occupants, (3) the association of large window areas with better views of the outdoor environment and an enhanced feeling of wellness, and (4) the lightweight structure. 1…”

Section: Introductionmentioning

confidence: 99%

A mock-up study for validation of an improved control algorithm for automated roller shade

Jeong

Choi

Sung

2014

This study aims to find an algorithm for precise control of the height of the automated roller shade that prevents the incoming direct sunlight from exceeding the preset control depth depending on the time and sky conditions but independent of the occupant's operation. The shade height can be automatically controlled using a profile angle for clear and partly cloudy skies and having the shade fully rolled up for overcast skies. After performing a field test using a half-scale testbed, an analysis was made to estimate the direct sunlight control depth. The estimates showed an average relative error of 19.6% and the maximum error of 60% (0.27 m). To minimize this error, new profile angle was calculated using the measured control depth for direct sunlight and the height of the roller shade during the field test. As a result, a calibration equation was obtained. After applying the equation to the algorithm, a second test was performed to analyse the control depth for direct sunlight. The error was reduced to within 20% (0.09 m).

“…[2][3][4][5] The usage of glazing fac¸ade has become increasingly popular for office buildings due to its aesthetics and visual transparency but with a high energy load and could cause visual discomfort due to glare. 6 A building design should firstly understand how climate response can influence its fac¸ade performance and how this would satisfy the requirement of sustainable development that has become an increasingly important design criteria demanded by the government and clients. [7][8][9][10][11][12][13][14][15] Buildings in sub-tropical climate (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…59 These types of buildings would require appropriate environmental control such as by using shading devices and/or thermal and glare resistance glazing material. 60,61 Alternatively, air conditioning with large consumption of energy would be needed to provide thermal comfort in the atrium. However, with optimal design, energy consumption for these kind of buildings have been kept below 150 kWh/m 2 /year in some regions of Europe.…”

Section: Introductionmentioning

confidence: 99%

A combined, large, multi-faceted bulbous façade glazed curtain with open atrium as a natural ventilation solution for an energy efficient sustainable office building in Southern China

Bai

Gong

et al. 2015

This paper investigates the ventilation performance of a stack system built with a bulbous façade glazed curtain and an open atrium in a six-storey office building, in DongGuan eco-park in southern China. Sustainable development, energy efficiency, indoor environmental quality and thermal comfort are the key criteria for the design; incorporating LingNan architectural cultural elements, with large open atrium for natural ventilation and openable windows to allow air movement throughout the building. The high energy load accentuated by the glazing would be offset by stack ventilation, to provide indoor circulation of air to maintain a satisfactory level of thermal comfort in spring/autumn, without relying on air conditioning, thus saving energy consumption (about 60%). Computational Fluid Dynamics (CFD) simulations were conducted to determine the efficacy of natural ventilation to illustrate the heat storage, dissipation and transfer within the building. The ventilation and heat dissipation performance of the stack system in the bulbous atrium in different seasons are illustrated with four different percentage of inlet and outlet openings. In summer and autumn/spring, good natural ventilation performance in the building can be achieved by the bulbous façade layer caused by buoyancy force and wind pressure and in the atrium courtyard. Sound ventilation performance can be achieved in rooms on most floors, while worst ventilation performance is expected in the top floor. The design of the bulbous façade with a large open atrium can provide effective ventilation efficiency for a better indoor thermal environment by strategic use of building self-shading and natural ventilation.