EXPERIMENTAL MEASUREMENTS AND TRNSYS SIMULATIONS OF ENERGY CONSUMPTION AND ENERGY EFFICIENCY OF HVAC SYSTEMS IN COOLING MODE IN OFFICE BUILDINGS

2017 ◽  
Author(s):  
Marius Adam
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Hvac Systems ◽  
Office Buildings ◽  
Experimental Measurements ◽  
Cooling Mode

Effect of Smart Glazing Window on Energy Consumption inside Office Building

2020 ◽  
Vol 1008 ◽  
pp. 72-83
Author(s):  
Asmaa Mohammed Nageib ◽  
Abbas Mohamed El-Zafarany ◽  
Fatma Osman Mohamed ◽  
Mohamed Helmy El-Hefnawy
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Solar Radiation ◽  
Climatic Conditions ◽  
Office Buildings ◽  
Smart Windows ◽  
Upper Egypt ◽  
Natural Lighting ◽  
North East ◽  
Office Rooms

The office buildings in Egypt, especially in Upper Egypt, reflect serious problems in achieving for energy efficiency as a result of increasing the use of mechanical refrigeration devices in office rooms, due to solar radiation and rising summer temperatures in recent years. Smart windows can play an important role in reducing significantly the energy consumption and maintaining energy inside buildings, also helps to control incoming solar radiation in order to minimize solar gain, especially in summer as well as ensuring the best natural lighting conditions without glare inside a room. This paper aims to evaluate the most efficient daylight and thermal performance of various types of the smart glazing and its impact on the energy consumption in the climatic conditions of one of the office buildings (Diwan governorate) in Sohag governorate as one of Upper Egypt governorates, with determining the best smart glass types for efficient use of energy. The paper follows the theoretical, applied, by studying types of smart glazing and their relation to achieving the energy efficiency. Then using (Energy Plus) simulation tool, which has been used in utilizing its modeling orientation (Design Builder) to study using types of smart glazing on the model of an office room in Building of Diwan governorate of Sohag in the four different orientations (North, East, South and West), when window-to-floor ratios (WFRs) (8%, 16%, 24% and 32%). The paper ends with a presentation of the most important results, recommendations and determination the best types of smart glass that provides energy, daylight without glare and providing greater comfort to users.

scholarly journals The Impacts of Energy Efficiency Design Parameters on Office Buildings Energy Consumption in Different Climate Zones in China

2017 ◽  
Vol 205 ◽  
pp. 2478-2484
Author(s):  
Liqiang Hou ◽  
Yan Liu ◽  
Liu Yang ◽  
Jiang Liu ◽  
Yuhao Qiao
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Office Buildings ◽  
Design Parameters ◽  
Climate Zones

scholarly journals Energy Efficient Air Curtains for Industrial Gates in Cold Climates

2021 ◽  
Vol 246 ◽  
pp. 08005
Author(s):  
A.S. Strongin ◽  
A.M. Zhivov
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Efficient ◽  
Air Conditioning ◽  
Thermal Power ◽  
Hvac Systems ◽  
Energy Resources ◽  
Cold Climates ◽  
Construction Costs ◽  
Reduce Energy Consumption

In geographical areas with cold climates, large, massively constructed industrial and warehouse buildings and logistics complexes are large consumers of energy resources. The great height and large contained volumes of the premises, the presence of a significant number of doors, and building configurations that include many transport corridors all require the use of air-thermal curtains to increase the energy efficiency of the buildings’ heating, ventilating, and air-conditioning (HVAC) systems, which commonly produce several thousand kilowatts of thermal power. Optimization of air curtains can improve the microclimates of the premises, achieve savings in the initial construction costs, and also reduce energy consumption during operation by 10–20%.

IMPACT OF RETROFITTING ENERGY-EFFICIENT DESIGN STRATEGIES ON ENERGY USE OF EXISTING COMMERCIAL BUILDINGS: COMPARATIVE STUDY OF LOW-IMPACT AND DEEP RETROFIT STRATEGIES

2017 ◽  
Vol 12 (4) ◽  
pp. 70-88 ◽  
Author(s):  
Ajla Aksamija
Keyword(s):  
Energy Consumption ◽  
Energy Efficient ◽  
Hvac Systems ◽  
Building Envelope ◽  
Energy Modeling ◽  
Office Buildings ◽  
Existing Buildings ◽  
Design Strategies ◽  
Energy Usage ◽  
Building Systems

This article discusses energy-efficient retrofitting design strategies for commercial office buildings, and examines their effect on energy consumption. The objective of the research was to study how to integrate passive design strategies and energy-efficient building systems to improve building performance, and reduce the energy consumption of existing buildings in three different climate types (cold, mixed and hot climates). First, properties of existing buildings were analyzed based on national CBECS database to determine typical characteristics of office buildings located in Chicago, Baltimore and Phoenix, including size, building envelope treatment and building systems. Then, fourteen different prototypes were developed, varying the building shape and orientation to represent different building stock, and energy modeling was conducted to establish energy usage baseline. Multiple design considerations were investigated based on extensive energy simulations and modeling, where low-impact and deep retrofits were considered. Low-impact strategies included improvements to the building envelope, lighting systems and optimization of HVAC systems operation (without upgrading heating and cooling equipment). Deep energy retrofits also included improvements to building envelope and lighting, and considered changes and improvements to HVAC systems (specifically, integration of radiant systems). Energy modeling was conducted for all prototypes, and results were obtained for the baseline (current energy usage), and energy usage considering low-impact design strategies and deep retrofits. A total of 126 energy models was developed, simulated and analyzed, providing a dataset that captured energy usage for investigated scenarios. The comparative analysis of simulation results was used to determine how specific techniques lead to energy savings in different climate types, as well as for buildings of various shapes and orientations.

scholarly journals Cost Control Methods for Efficient HVAC in Office Building

2019 ◽  
Vol 9 (2S2) ◽  
pp. 511-515
Keyword(s):  
Energy Efficiency ◽  
Indoor Air ◽  
Energy Cost ◽  
Sustainable Design ◽  
Hvac Systems ◽  
Building Envelope ◽  
Office Buildings ◽  
Office Building ◽  
Control Methods ◽  
Wall Construction

Achieving Energy Efficiency in Office Buildings plays a key role in reducing the Environmental Impact of Buildings to a larger extent. The Users in the workplace are often affected by the improper design of HVAC systems. In most of the office buildings the Indoor Environmental conditions were not designed, controlled and maintained which in turn increases the Energy cost of the buildings. Sustainable Design of HVAC Systems includes all the mechanical equipments that efficiently controls, monitors and supplies the Indoor Air. The objective of this paper is to (i) Do a comparative study and analyses the various building Envelope in office buildings for reducing the Energy Cost in designing HVAC systems in Office buildings using Ecotect Modelling.(ii) To compare the Energy cost of Water Cooled Screw Chillers and VRF Systems. The above experimentation was held in ELCOT S office building in salem. The findings of this paper revealed that usage of Porotherm wall construction along with VRF SYSTEMS in office buildings found to be effective in achieving sustainable HVAC design.

Energy efficiency practices for Malaysian green office building occupants

2018 ◽  
Vol 8 (2) ◽  
pp. 134-146 ◽  
Author(s):  
Chukwuka Christian Ohueri ◽  
Wallace Imoudu Enegbuma ◽  
Russell Kenley
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Building Materials ◽  
Office Buildings ◽  
Strategy Training ◽  
Office Building ◽  
Performance Gap ◽  
Content Type ◽  
Behavioural Strategy ◽  
Reduce Energy Consumption

Purpose Green building construction was adopted as a strategy to reduce energy consumption and the overall impact of the built environment on our natural environment. However, in Malaysia, previous studies have reaffirmed that green office buildings consume a substantial amount of energy, compared to their counterparts in Singapore. Moreover, there is still a significant performance gap between predicted energy measurements and actual operational energy consumption of green office buildings in Malaysia, due to occupants’ behavioural discrepancies. Therefore, the purpose of this paper is to develop energy efficiency practices for occupants of green office buildings in Malaysia. The developed practices integrate technology, organisation policy, and occupants’ behavioural strategies, in order to reduce the energy consumption of green office buildings in Malaysia. Design/methodology/approach To achieve the research goal, a mixed (quantitative and qualitative) research method was used to collect data from the research population. In total, 53 respondents working in a green office building complex in Kuala Lumpur Malaysia were surveyed using a questionnaire. Additionally, three top management staff of the green office building and two Malaysian construction professionals were interviewed. The study adopted convenience sampling technique in selecting the research respondents. The data from the questionnaire were analysed using SPSS software (version 22) while the interview data were analysed via thematic content analysis. Findings The findings suggest that the integration of technological strategy (use of BIM tools, sustainable building materials, etc.); organisational strategy (develop, implement and evaluate action plans, use of monitor/control systems, etc.); and occupants behavioural strategy (training, incentives, occupants energy efficiency guide, etc.) will critically reduce energy consumption of green office buildings in Malaysia. Originality/value Based on the findings, energy efficiency practices are developed to guide occupants in reducing the energy consumption of green office buildings in Malaysia. This strategy will contribute to reducing the performance gap that exists between predicted energy and actual energy use of green office buildings in Malaysia. However, the developed energy efficiency practices need to be validated to ascertain its workability in the green office building context.

Data analytics for occupancy pattern learning to reduce the energy consumption of HVAC systems in office buildings

2017 ◽  
Vol 35 ◽  
pp. 191-208 ◽  
Author(s):  
Alfonso Capozzoli ◽  
Marco Savino Piscitelli ◽  
Alice Gorrino ◽  
Ilaria Ballarini ◽  
Vincenzo Corrado
Keyword(s):  
Energy Consumption ◽  
Data Analytics ◽  
Hvac Systems ◽  
Office Buildings ◽  
Pattern Learning

ASSESSMENT OF ENERGY EFFICIENCY OF CUSTOMER CARE BUILDINGS OF TELECOMMUNICATIONS COMPANIES IN SELECTED TOWNS IN NIGERIA

2020 ◽  
Vol 17 (1) ◽  
pp. 1 ◽  
Author(s):  
Buhari Mohammed Manzuma ◽  
Usman Abdulfatah Adekunle ◽  
Andrew Mhya Stanley
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Use ◽  
Hvac Systems ◽  
Energy Audit ◽  
North West ◽  
Customer Care ◽  
Telecommunication Companies ◽  
Energy Consuming ◽  
Telecommunications Companies

The importance of energy to human development cannot be overemphasized as it is a key determinant of economic development of all nations. However, the supply of energy has hardly ever been sufficient to meet up with the ever increasing demands exerted by multiplying population and industrialization. Buildings are accountable for nearly 40% of the total global annual energy consumption most of which is used for lighting and air conditioning. With the building sector having a relatively high potential for energy efficiency improvements compared to other sectors, this research therefore assessed the energy efficiency of the customer care buildings of telecommunication companies in selected towns in north-west Nigeria. This was done by finding out where and how energy is being used in the buildings by estimating the energy consumption of the buildings through assessment of the energy bills and a preliminary energy audit and benchmarking with set standard. Descriptive statistical analyses was done and it was found that 85.71% of the buildings have their HVAC systems consuming over 50% of their total energy with an average consumption of 74.58% per year. Also 57.14% of the buildings have higher energy use and energy use intensities than the benchmarks. It was concluded that the major energy consuming systems are the HVAC and lighting. It is therefore recommended that grid electricity which is the main source of energy to the buildings should be stabilized; while greater advantage should be taken of passive ventilation and cooling rather than mechanical HVAC systems.

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