scholarly journals The effect of architectural façade design on energy savings in the student dormitory

2014 ◽  
Vol 18 (3) ◽  
pp. 979-988 ◽  
Author(s):  
Petar Pejic ◽  
Dusan Petkovic ◽  
Sonja Krasic
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Natural Light ◽  
Energy Costs ◽  
Student Activities ◽  
Energy Consumption Analysis ◽  
Shading Devices ◽  
Major Factors ◽  
New Student ◽  
Work And Life

There are many reasons for adequate use of natural light inside students' dormitories. Intensity of light required for student activities and temperature inside the rooms are the major factors for an occupant's comfortable work and life. Design of building fa?ades has a significant impact both on the use of natural light and energy consumption. In this paper, a comparative analysis of student rooms with different orientations and different fa?ade designs was performed in order to investigate what type of refurbishment in the fa?ade is necessary. The goal of the refurbishment was generation of optimal thermal and lighting comfort for students' work with maximal energy saving for a new student dormitory in Nis, Serbia. An analysis of annual energy consumption of the newly designed student dormitory and proposed replacements on the exterior fa?ade was performed by using the software EnergyPlus. Based on the energy consumption analysis it could be concluded that significant energy savings would be possible by upgrading the shading devices across the width of the window. In other words, changing the fa?ade of the dorm could generally improve students' comfort, while the energy costs would be reduced.

Reducing Energy Consumption of Pneumatic Artificial Muscles With Component Integration

2011 ◽  
Author(s):  
Daniel Christ ◽  
Tad Driver ◽  
Xiangrong Shen
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Artificial Muscle ◽  
Dead Volume ◽  
Artificial Muscles ◽  
Interior Space ◽  
Component Integration ◽  
Energy Consumption Analysis ◽  
Custom Made ◽  
Saving Effect

Pneumatic artificial muscle (PAM) is a class of flexible muscle-like actuator with low structure weight and high power density. In this paper, an integrated PAM design is presented, which incorporates peripheral elements, especially the control valves, in the interior space of the actuator to reduce the size and complexity of the entire system. More importantly, the incorporated components are expected to largely eliminate the dead volume in the PAM actuator, and improve its energy efficiency. An energy consumption analysis is presented, which estimates the maximum percentage of achievable energy savings. A practical design, incorporating standard poppet valves is also presented. To demonstrate the energy saving effect of the proposed design, experiments were conducted with a commercial PAM actuator modified to incorporate a solid bar. Experimental results indicate an energy savings of up to 13%, which is expected to increase significantly with the custom-made integrated PAM actuators in the future.

scholarly journals Electric energy consumption of milking process on some Finnish dairy farms

2017 ◽  
Vol 26 (3) ◽  
Author(s):  
Mari Rajaniemi ◽  
Tapani Jokiniemi ◽  
Laura Alakukku ◽  
Jukka Ahokas
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Electric Energy ◽  
Cooling Water ◽  
Electricity Consumption ◽  
Dairy Farms ◽  
Energy Costs ◽  
Heating Systems ◽  
Electric Energy Consumption ◽  
Energy Saving Potential

The aim of this study was to examine the electric energy consumption of milking process on dairy farms and to evaluate the methods to improve the energy efficiency. The electricity consumption of the milking process was measured on three dairy farms in Southern Finland, and it varied between 37–62 Wh kg-1 milk.  The largest energy saving potential was identified in milk cooling and the heating of cleaning water. Even simple methods, such as placing the condenser of the refrigeration system outside, may reduce the energy consumption of milk cooling by 30%. Efficient milk pre-cooling can reduce the energy consumption of the whole milking process by more than 25%. Even larger energy savings are possible with a sophisticated milk cooling – water heating systems. It was concluded that there is a significant potential to reduce the energy consumption and energy costs of the milking process, and thus to improve the profitability and sustainability of the sector at the same time.

scholarly journals Integrating Daylighting with Task-Ambient Lighting for Enhanced Energy Savings in Office Spaces

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Simeon Nyambaka Ingabo ◽  
Pipat Chaiwiwatworakul
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Fundamental Aspect ◽  
Free Standing ◽  
Ambient Lighting ◽  
Lighting Energy ◽  
Task Lighting ◽  
Shading Devices

Daylighting has been widely studied as a fundamental aspect of spatial illumination and energy efficient façade design. Effective installation and control of shading devices diminishes the adverse effects of prevailing climatic conditions on building envelope performance and reduces resultant lighting and cooling energy consumption. Task-ambient lighting as a free-standing approach has also been proven to reduce lighting energy consumption compared with typical general ambient lighting. This study estimates the energy saving potential of integrating daylighting through fixed external horizontal shading slats with task lighting. Spot measurements were taken in a test room to validate a daylight calculation program. Full year indoor work plane daylight simulations were performed for office spaces of different floor areas and varying window to wall ratios. Indoor daylight quality was assessed using the Useful Daylight Illuminance metric and three different task lighting schemes explored.  Lighting energy savings of 10% to 90% were estimated under the three schemes in comparison to similar office spaces with common unshaded heat reflective glazing.

scholarly journals Effect of external solar shading usage on energy consumption and thermal comfort in the student dormitory in Niš

2019 ◽  
Vol 111 ◽  
pp. 03050
Author(s):  
Dragana Krstić ◽  
Miomir Vasov ◽  
Veliborka Bogdanović ◽  
Marko Ignjatović ◽  
Dušan Ranđelović
Keyword(s):  
Energy Consumption ◽  
Comparative Study ◽  
Thermal Comfort ◽  
Parametric Study ◽  
Energy Savings ◽  
Thermal Conditions ◽  
Point Of View ◽  
South Side ◽  
Solar Shading ◽  
Shading Devices

External fixed shadings are largely used to provide solar protection for building glazed surfaces. They are reducing heat gains and sensational visual discomfort caused by excessive daylighting. This paper presents a comparative study on external aluminium fixed shadings used on a student dormitory on different orientations and different slat angles. The purpose is to determine which slat angles are best to use in different orientations, from the point of view of energy consumption, thermal comfort, and daylighting. An analysis of annual energy consumption of the student dormitory was performed by using the software EnergyPlus, whereas the model of the building was created using SketchUp and OpenStudio software. Then, a parametric study was carried out by changing slat angles and building orientations, in order to find the best-balanced results with no occupant discomfort and possible energy savings. Results have shown that by considering the most balanced results between energy savings and thermal comfort, the best angles of the slats are from 105˚ to 120˚ on the south side, and from 45˚ to 75˚ on the east and west sides. By installing external shading devices, indoor thermal conditions are improving and may lead to significant energy savings, compared to a building without shading devices.

scholarly journals Research on the Comprehensive Performance of Hygroscopic Materials in an Office Building Based on EnergyPlus

Energies ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 191 ◽  
Author(s):  
Shui Yu ◽  
Yumeng Cui ◽  
Yifei Shao ◽  
Fuhong Han
Keyword(s):  
Energy Consumption ◽  
Moisture Content ◽  
Life Cycle Cost ◽  
Energy Savings ◽  
Initial Moisture Content ◽  
Office Building ◽  
Weak Links ◽  
Energy Consumption Analysis ◽  
Passive Materials ◽  
Moisture Buffering

This paper presents the research status of hygroscopic materials, points out the weak links as targets for major breakthroughs, and introduces humidifying mechanisms and their categories. In this paper, we simulated a single-monomer Shenyang office building with different envelopes of inner-surface hygroscopic materials for indoor humidity conditions, energy consumption, and economy, which are three aspects of energy consumption analysis in EnergyPlus software. To obtain the best moisture buffering performance from hygroscopic materials, we also simulated different cases including the laying area, ventilation strategy, thickness, and initial moisture content of different hygroscopic materials. The humidity fluctuation, with changes in the style of hygroscopic materials and usage conditions, of a room in a building can be analyzed by numerical simulation. This allows the determination of the best moisture buffering performance of the building structure. The results show that hygroscopic materials have great advantages in three energy saving aspects of building assessment. Hygroscopic materials can regulate indoor air humidity and reduce energy consumption. In addition, the entire life-cycle cost can be minimized. Lower rates of air exchange and larger usable areas can help enhance the level of performance of hygroscopic materials. The thickness and initial moisture content of hygroscopic materials have little impact on the moisture buffering value. This study strived to provide a theoretical basis and technical guidance for the production and installation of hygroscopic materials. It also promoted the passive materials market and the building’s energy savings. The best moisture buffering performance, evaluated at room level in this paper, can be obtained through real-world environmental simulation.

scholarly journals Decision support for building renovation strategies

2011 ◽  
pp. 221-225
Author(s):  
Hang Yin
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Energy Costs ◽  
Energy Usage ◽  
Efficient Operation ◽  
Climate Targets ◽  
Low Energy Consumption ◽  
Decision Making Processes ◽  
Passive Houses ◽  
Modern Building

In Europe, buildings account for 40% of energy consumption and 36% of EU CO2 emissions. The energy usage of old structures built or rehabilitated before 1980 is as high as 300 kWh/m2/yr, which is greater than the figure for modern structures and passive houses. Obviously, old buildings are the major users of energy, as they use more than twice as much as the modern building. There are numerous published studies showing that energy savings of 40 to 74% can be achieved in commercial buildings through renovation. Implementing rational renovation, which results in efficient operation and maintenance and facilitates low energy consumption, creates a triple-win situation: it provides a much needed impetus to the European economy, it contributes to the achievements of energy and climate targets and it decreases energy costs for citizens, businesses and public bodies. Normally, the renovation of existing buildings usually involves decision-making processes. The challenge is that ...

scholarly journals STATE OF SEED PRODUCTION AND AGRO-ENERGY EFFICIENCY ASSESSMENT OF RED FESCUE SEED PRODUCTION

2020 ◽  
Vol 2020 (3) ◽  
pp. 25-39
Author(s):  
Vladimir Zolotarev
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Total Energy ◽  
Seed Production ◽  
Energy Savings ◽  
Optimal Time ◽  
Energy Costs ◽  
Total Energy Consumption ◽  
Red Fescue ◽  
Seed Crops

Red fescue (Festuca rubra L.) it is one of the most popular crops for creating lawns of various types and as a component of meadow and pasture poly-species mixtures of long-term use. The volume of domestic production of seeds of this crop is less than 2% of the total sales of seed material on the Russian market. The wide expansion of imported seeds of foreign-selected varieties to the domestic market sharply raises the question of the need to develop seed production of this crop in Russia. To do this, it is necessary to intensify breeding for the development of new varieties of red fescue, the development of zonal technologies for cultivating them for seeds. Analysis and generalization of research results shows that when using a set of optimal agricultural techniques, it is possible to consistently receive seed collections of more than 0.4 t/ha. This level of seed yield ensures high profitability of production and recoupment of energy costs. Assessment of the energy efficiency of technologies for cultivation of red fescue pasture-lawn ecotype shows that the total energy consumption per 1 ha of seed was 17.7 GJ, per 1 kg of seeds – 68.2 MJ. Due to the increase in yield by 44.4% and the use of energy-saving techniques, energy savings per 100 kg of seeds amounted to 25.6%. The energy assessment showed that as a result of harvesting seed crops by direct threshing in the optimal time frame, total energy costs decreased by 19%, and energy consumption for fuel – by 29%.

scholarly journals Features of the rolling-separation technology development on operating continuous small-grade mill

2020 ◽  
Vol 63 (5) ◽  
pp. 313-317
Author(s):  
A. R. Fastykovskii ◽  
A. G. Nikitin ◽  
S. V. Belyaev ◽  
A. V. Dobryanskii
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Technology Development ◽  
Energy Costs ◽  
Form Analysis ◽  
Separation Technology ◽  
Reinforcing Bar ◽  
Use Of Technology ◽  
Current Production ◽  
Reduction Of Energy Consumption

Аt present, there is a steady tendency to increase volume of i dustrial and civil construction in Russia and abroad. This in turn makes it necessary to enhance production of structural sections and in particular – reinforcing bar. One of the promising ways to increase production of reinforcing bar at existing rolling mills is development of rollingseparation technology. This technology provides growth in productivity of existing small-grade mills and reduces energy costs without large capital expenditures. However, despite its apparent simplicity, introduction of rolling-separation technology at existing enterprises causes difficulties associated with insufficient coverage of this experience in literature. The article presents experience of introduction of the rolling-separation technology on operating continuous small-grade mill. The research was carried out on equipment available in the workshop and used to monitor load of the main engines. Features of energy costs distribution on stands were studied at classical rolling and with the use of technology of rolling-separation of reinforcing bar No. 10, No. 14 made of 35GS and 3PS steel. Experimental graphs of the main engines of the rolling mill load show redistribution of energy consumption in stands for roughing, intermediate and finishing groups when using rolling-separation technology. Data on application of the main engine power and distribution of the specific load on the stands in classical rolling method and using rolling-separation technology are presented in graphic form. Analysis of the received data allowed us to reveal features of energy consumption at development of rolling-separation technology during operation. It is shown that use of this technology leads to additional load on stands of finishing groups. Energy savings during introduction of rolling-separation technology were quantified, and it was found that with a decrease of the rebar number, efficiency increases. Reduction of energy consumption during development of this technology in current production is associated with a decrease in machine time.

scholarly journals Multi-Objective Analysis of a Fixed Solar Shading System in Different Climatic Areas

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3249 ◽  
Author(s):  
Jessica Settino ◽  
Cristina Carpino ◽  
Stefania Perrella ◽  
Natale Arcuri
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Objective Analysis ◽  
Electricity Production ◽  
Artificial Lighting ◽  
Multi Objective ◽  
Solar Shading ◽  
Accurate Design ◽  
Shading Devices ◽  
Shading Device

This study tackles the analysis of fixed external solar shading systems. The geometry of a building and of the shading system has been parametrically defined and a genetic optimization analysis has been carried out to identify an architectural solution that would allow the increase of energy savings, through a suitable window-to-wall ratio and an accurate design of the shading device. A multi-objective analysis has been performed with the aim of minimizing the energy consumption for space heating, cooling and artificial lighting, while ensuring the visual comfort of the occupants. The main goal of the study is to explore the influence of climatic context on the optimal design of shading devices. The analysis has been performed for three different latitudes across Europe. In all analyzed cases, a reduction of the annual energy consumption could be achieved, up to 42% if the optimal shading configuration is used. Moreover, the possibility of integrating the shading system with photovoltaic (PV) panels has been considered and the electricity production has been estimated.

scholarly journals Performance Evaluation of External Light Shelves by Applying a Prism Sheet

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4618 ◽  
Author(s):  
Heangwoo Lee ◽  
Janghoo Seo
Keyword(s):  
Performance Evaluation ◽  
Energy Consumption ◽  
Economic Efficiency ◽  
Energy Savings ◽  
Building Energy ◽  
Full Scale ◽  
Natural Light ◽  
Building Sector ◽  
Sector Research ◽  
Lighting Energy

To address the increased use of lighting energy in the building sector, research on the use of light shelves has been increasing. Previous studies have focused on applying operating techniques to improve daylighting performance, which reduces the economic efficiency of light shelves and the building energy savings. This study proposes the use of prism sheets to improve the performance of light shelves, a concept which was validated by evaluating the performance related to saving building energy and improving indoor light uniformity through a full-scale testbed. This study used an external light shelf with no prism sheet, a window with a prism sheet applied, and a window with both an external light shelf and prism sheet applied as Case 1, Case 2, and Case 3, respectively, and analyzed the illuminance distribution and lighting energy consumption required to maintain the optimal indoor illumination for each case. This study also derived the optimal specifications for each case to save building energy and considered the flow of natural light to analyze the performance evaluation results. The main findings are as follows: (1) the optimal specifications to improve daylighting performance were derived for Case 1, requiring the application of operating techniques; (2) Case 2 was not suitable for saving energy and improving light uniformity when compared to Case 1; and (3) Case 3 was effective in saving building energy. In Case 3, even when the light shelf was fixed at 20° without moving, it saved building energy and improved light uniformity compared to Case 1. However, the prism sheet in Case 3 should be detached during winter to maximize building energy savings.

Sign in / Sign up

Export Citation Format

Share Document