Office Interior: The Influence of Office  Environmental Factors towards Task Performance

Office environment has become crucial in providing comfort for the workers and in maintaining the sustainability of an office. Office environmental comfort is significant to office workers life as the office has become their second home. Almost half of the five working days were spend in the office. Air conditioning and lighting are among the most significant contributors to high energy consumption in office building in Malaysia. In promoting an energy efficient building, consumption of electrical lighting and air condition in office from morning till evening requires an investigation. The aim of the research is to explore the environmental condition of office which occupied by design related field employees. The environmental air condition and lighting preference are among the significant variables tested. A controlled experiment of a mock-up office with combination of those variables was conducted. The findings indicate that the office workers can still perform their task in extreme conditions which are low level of lighting below 200 lux with highest or lowest temperature between 16 to 32 Degree Celsius, however, the percentage of completion (POC) of the AutoCAD drafting task relatively decreasing. This scenarios show that the designers’ office environmental conditions have significant impact towards task performance. The optimum office environmental setting is needed in order to increase employee’s task performance.

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Understanding the Reasons behind the Energy Performance Gap of an Energy-Efficient Building, through a Probabilistic Approach and On-Site Measurements

Energies ◽

10.3390/en14196178 ◽

2021 ◽

Vol 14 (19) ◽

pp. 6178

Author(s):

Pierryves Padey ◽

Kyriaki Goulouti ◽

Guy Wagner ◽

Blaise Périsset ◽

Sébastien Lasvaux

Keyword(s):

Energy Efficient ◽

Probabilistic Approach ◽

Energy Performance ◽

High Energy ◽

Performance Gap ◽

Post Evaluation ◽

Energy Efficient Buildings ◽

Ex Post ◽

The Difference ◽

Energy Efficient Building

The performance gap, defined as the difference between the measured and the calculated performance of energy-efficient buildings, has long been identified as a major issue in the building domain. The present study aims to better understand the performance gap in high-energy performance buildings in Switzerland, in an ex-post evaluation. For an energy-efficient building, the measured heating demand, collected through a four-year measurement campaign was compared to the calculated one and the results showed that the latter underestimates the real heating demand by a factor of two. As a way to reduce the performance gap, a probabilistic framework was proposed so that the different uncertainties of the model could be considered. By comparing the mean of the probabilistic heating demand to the measured one, it was shown that the performance gap was between 20–30% for the examined period. Through a sensitivity analysis, the active air flow and the shading factor were identified as the most influential parameters on the uncertainty of the heating demand, meaning that their wrong adjustment, in reality, or in the simulations, would increase the performance gap.

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Study on Economic Benefit Evaluation Model of Energy-efficient Power Plant Projects with High Energy Consumption Users

2020 5th Asia Conference on Power and Electrical Engineering (ACPEE) ◽

10.1109/acpee48638.2020.9136391 ◽

2020 ◽

Author(s):

Wu Kuihua ◽

Zheng Zhijie ◽

Li Hao ◽

Liu Bo ◽

Li Zhao ◽

...

Keyword(s):

Energy Consumption ◽

Power Plant ◽

Energy Efficient ◽

Economic Benefit ◽

Evaluation Model ◽

High Energy ◽

Benefit Evaluation ◽

Efficient Power ◽

High Energy Consumption

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Identifying Retrofitting Strategies to Achieve Energy Efficient Building Design in Existing Buildings

Periodica Polytechnica Architecture ◽

10.3311/ppar.16909 ◽

2021 ◽

Author(s):

Fadi Salah ◽

Merve Tuna Kayılı

Keyword(s):

Energy Efficient ◽

Energy Savings ◽

Building Design ◽

High Energy ◽

Insulation Material ◽

Existing Buildings ◽

The North ◽

Heating And Cooling ◽

Definition Of ◽

Energy Efficient Building

Reducing the energy needs of existing buildings has a significant place in reducing global energy demands. High energy savings can be achieved with passive renovation suggestions in existing buildings. In this study, the effect of the proposed renovations for an educational structure in Safranbolu on the heating and cooling demands of the building was determined with a simulation program. Energy improvements of up to 70 percent have been achieved through passive improvement designs in orientation and insulation material. The highest energy saving (69.31 %) was realized through a scenario of rearranging spaces from the north side to the south side where the number of users is relatively high and selecting a 20 cm aerogel thermal insulation material. While the heating and cooling load, in accordance with the definition of a zero-energy building, could not be reached in this scenario, the study showed the importance of holistic decisions taken in the design phase of the building with respect to energy-efficient building design.

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OPTIMAL WINDOW GEOMETRY FACTORS FOR ELEMENTARY SCHOOL BUILDINGS IN PORTUGAL

Journal of Green Building ◽

10.3992/1943-4618.13.1.185 ◽

2018 ◽

Vol 13 (1) ◽

pp. 185-198 ◽

Cited By ~ 1

Author(s):

Jorge S. Carlos

Keyword(s):

Energy Efficient ◽

Energy Savings ◽

High Energy ◽

Building Envelope ◽

Major Influence ◽

Thermal Discomfort ◽

Building Component ◽

U Value ◽

High Energy Consumption ◽

Optimal Window

INTRODUCTION With respect to thermal performance, windows are the weakest component of the building envelope, essentially because the U-value is usually higher than the opaque envelope. This would allow the highest heat conductance of the building envelope. However, it also helps buildings to gain useful solar heat during winter. Therefore, it has been generally accepted that passive buildings would have small windows towards the poles and large windows facing the equator (Persson, Roos, and Wall 2006). In spite of this guideline, large or fully glazed facades have been used in modern architecture. The intensive use of air conditioning is the result of overheating and high thermal loss problems, which otherwise would lead to thermal discomfort. This extensive use of large windows associated with high energy consumption has motivated researchers to study this building component. Window areas were investigated by Persson et al. (Persson, Roos, and Wall 2006) on 20 terraced houses with larger windows facing the equator and built in Gothenburg. The building envelope was well insulated and fitted with energy efficient windows. It was found that energy efficient windows do not have a major influence on the heating demand in the winter, but it is relevant for the cooling need in summer. Therefore, reduced indoor illuminance due to small windows can be solved by enlarging them in order to obtain relevant daylighting conditions. When efficient windows are designed for a warm climate, as in Mexico, reducing heat flux and solar transmittance indoors was the best option for energy savings (Aguilar et al. 2017). However, reducing solar transmittance influences the indoor illuminance, which was not analyzed.

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The Energy Conservation Analysis and Transformation Technology for Flat Roofs of Existing Buildings in Zhengzhou

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.1824 ◽

2011 ◽

Vol 71-78 ◽

pp. 1824-1830

Author(s):

Yi Zhong Zhang ◽

Chao Yan

Keyword(s):

Energy Conservation ◽

Energy Efficient ◽

High Energy ◽

Building Construction ◽

Existing Buildings ◽

Insulating Materials ◽

Conservation Analysis ◽

Energy Conservation Measures ◽

Flat Roofs ◽

High Energy Consumption

For the construction of a building was insulated and energy efficient effect, zhengzhou have evaluated the building, construction and the flat roofs structure raging indicators and energy conservation of heat transfer is far below the effect of the relevant provisions. In the heat of the environment, the building runs high energy consumption, raise the roof insulating structure of the insulator, "flat" to "slope" and adopt a ceiling on the roof insulating materials of energy conservation measures for reforming and feasibility of energy conservation raging technical analysis.

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An Energy-Efficient Model for Opportunistic Data Collection in IoV-Enabled SC Waste Management

Handbook of Research on 5G Networks and Advancements in Computing, Electronics, and Electrical Engineering - Advances in Computer and Electrical Engineering ◽

10.4018/978-1-7998-6992-4.ch001 ◽

2021 ◽

pp. 1-19

Author(s):

Gerald K. Ijemaru ◽

Ericmoore T. Ngharamike ◽

Emmanuel U. Oleka ◽

Augustine O. Nwajana

Keyword(s):

Data Collection ◽

Waste Management ◽

Energy Efficient ◽

Vehicular Networks ◽

Access Point ◽

High Energy ◽

Sensor Nodes ◽

Management Scenarios ◽

Mobile Data Collectors ◽

High Energy Consumption

Recent advancements in technological research have seen the use of mobile data collectors (MDCs) or data MULEs for wireless sensor network (WSN) applications. In the context of smart city (SC) waste management scenarios, vehicular networks or the internet of Vehicles (IoV) can be exploited as MDCs or data MULEs for data collection and transmission purposes from the sparsely distributed smart sensors that are attached to the smart bins to an access point or sink node and further deployed for waste management operations. A major challenge with the traditional methods of data collection using static sink nodes is the high energy consumption of the sensor-nodes. The use of MDCs has been well studied and shown to be energy efficient. To the best of the authors' knowledge, this scheme has not been exploited for waste management operations in a SC. Compared to the centralized schemes, the data MULE scheme presents several advantages for data collection in WSN applications. This chapter proposes an energy-efficient model for opportunistic data collection in IoV-enabled SC waste management operations.

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RELEVANCE OF THE RENOVATION SOLUTIONS RESIDENTAL HOUSING IN THE ENERGY EFFICIENCY CONTEXT

Modern technology materials and design in construction ◽

10.31649/2311-1429-2021-1-140-147 ◽

2021 ◽

Vol 30 (1) ◽

pp. 140-147

Author(s):

T. Serdyuk ◽

◽

S. Franyshina ◽

Keyword(s):

Energy Efficiency ◽

Energy Consumption ◽

Energy Efficient ◽

High Energy ◽

European Countries ◽

Domestic Economy ◽

Effective Mechanism ◽

Energy Characteristics ◽

High Energy Consumption ◽

Comparative Information

The main energy efficiency problems of existing houses in domestic economy are discussed. This article presents the housing renovation projects experience in the European countries. Renovation is one of the most effective method of energy efficient of the old building. But in Ukraine this effective mechanism is not worked. Implementation of the renovation mechanism in Ukraine is practically not carried out legislation and lack of regulatory framework. The issues of reduce energy resourses in residential buildsing are very important not only in Ukraine but in other European countries. The problem of low housing supply is additionally compounded by the problem of high energy consumption of excising housing.This raises many issues related to the implementation of this program. The energy characteristics of excising housings are given. Comparative information on housing for the population are shown.

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The Analysis of Multi-Apartment Residential Buildings Energy Consumption in Russia

E3S Web of Conferences ◽

10.1051/e3sconf/202021701003 ◽

2020 ◽

Vol 217 ◽

pp. 01003

Author(s):

Aleksandr Lanko ◽

Francisco José Sánchez de la Flor ◽

Yuri Geraskin

Keyword(s):

Energy Consumption ◽

Energy Efficient ◽

Residential Buildings ◽

High Energy ◽

Apartment Buildings ◽

Energy Metering ◽

High Energy Efficiency ◽

New Buildings ◽

High Energy Consumption ◽

Insufficient Number

The main reasons for the high energy consumption of residential multi-apartment buildings in Russia are the lack of motivation of developers in the construction and equipment of new buildings with a high energy efficiency class, as well as the insufficient number of energy metering devices. The main solution to the problem may be state support for energy-efficient technologies, compensation for excessive costs of the developer.

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The Improvement of Preamble Mechanism and Addition of TDMA/CSMA Mechanism for B-MAC

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.48-49.1261 ◽

2011 ◽

Vol 48-49 ◽

pp. 1261-1264

Author(s):

Min Sheng Tan ◽

Hai Tao Tan ◽

Meng Chen ◽

Xiang Li

Keyword(s):

Energy Consumption ◽

Packet Loss ◽

Energy Efficient ◽

Loss Rate ◽

Mac Protocol ◽

High Energy ◽

Wireless Sensor ◽

High Energy Consumption ◽

Funneling Effect ◽

Better Than

B-MAC was a kind of MAC protocol which was widely used in Wireless Sensor Networks (WSNs), and some high requirements had been provided for users. However, there were always challenges due to the high energy consumption and packets loss rate. A new MAC protocol called B-MAC++ based on B-MAC was proposed in this paper. The preamble mechanism was improved and funneling effect alleviation mechanism was brought out in B-MAC++. For the combination of the strengths of TDMA and CSMA, the preamble mechanism improvement achieved better energy-efficient, and made up to the weakness of WSNs, and a kind of CSMA/TDMA mechanism was introduced to alleviate funneling effect, and the sink-node’s packet loss had been reduced. Experiments show that B-MAC++ is better than B-MAC in the performance of energy consumption and packet loss rate.

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