scholarly journals Thermal Conductivity of Lightweight Concrete Block with Various Cooling Agent

2020 ◽  
Vol 12 (9) ◽  
Author(s):  
Masni A. Majid ◽  
◽  
Aina Syafawati Roslan ◽  
Noor Azlina Abdul Hamid ◽  
Norhafizah Salleh ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Energy Consumption ◽  
Energy Demand ◽  
Lightweight Concrete ◽  
Human Life ◽  
Concrete Block ◽  
Experimental Result ◽  
Cooling Agent ◽  
Reduce Energy Consumption ◽  
Day By Day

Energy was the important sources to human life. Due to increases energy demand in daily life, the energy consumption was increase day by day because of the heat load from solar radiation and heat produced by people. Toward sustainable development, this research was carried out to develop a lightweight concrete (LWC) block with various cooling agent such as glycerine, propylene glycol, coconut shell and gypsum powder. Six lightweight concrete (LWC) block with the size 250mm (L) × 250mm (W) × 100mm (T) were tested for thermal conductivity value. From the experimental result, it shows that lightweight concrete (LCW) block with various cooling agent obtained thermal conductivity value of 0.17W/mK - 0.36W/mK lower than thermal conductivity value for normal lightweight concrete (0.8W/mK) depending on concrete density. The lightweight concrete (LCW) block with cooling agent having low thermal conductivity value will reduce energy consumption in building.

scholarly journals Impact of Green Roofs on Energy Demand for Cooling in Egyptian Buildings

2020 ◽  
Vol 12 (14) ◽  
pp. 5729 ◽  
Author(s):  
Ayman Ragab ◽  
Ahmed Abdelrady
Keyword(s):  
Thermal Conductivity ◽  
Energy Consumption ◽  
Energy Demand ◽  
Soil Depth ◽  
Green Roof ◽  
Green Roofs ◽  
Climatic Regions ◽  
Reduce Energy Consumption ◽  
The Impact ◽  
Reducing Energy

Energy consumption for cooling purposes has increased significantly in recent years, mainly due to population growth, urbanization, and climate change consequences. The situation can be mitigated by passive climate solutions to reduce energy consumption in buildings. This study investigated the effectiveness of the green roof concept in reducing energy demand for cooling in different climatic regions. The impact of several types of green roofing of varying thermal conductivity and soil depth on energy consumption for cooling school buildings in Egypt was examined. In a co-simulation approach, the efficiency of the proposed green roof types was evaluated using the Design-Builder software, and a cost analysis was performed for the best options. The results showed that the proposed green roof types saved between 31.61 and 39.74% of energy, on average. A green roof featuring a roof soil depth of 0.1 m and 0.9 W/m-K thermal conductivity exhibited higher efficiency in reducing energy than the other options tested. The decrease in air temperature due to green roofs in hot arid areas, which exceeded an average of 4 °C, was greater than that in other regions that were not as hot. In conclusion, green roofs were shown to be efficient in reducing energy consumption as compared with traditional roofs, especially in hot arid climates.

scholarly journals Comparison of Optimized and Conventional Models of Passive Solar Greenhouse—Case Study: The Indoor Air Temperature, Irradiation, and Energy Demand

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5369
Author(s):  
Saleh Mohammadi ◽  
Esmail Khalife ◽  
Mohammad Kaveh ◽  
Amir Hosein Afkari Sayyah ◽  
Ali Mohammad Nikbakht ◽  
...  
Keyword(s):  
Air Temperature ◽  
Indoor Air ◽  
Energy Demand ◽  
Lightweight Concrete ◽  
Concrete Block ◽  
Coefficient Of Determination ◽  
Solar Greenhouse ◽  
Temperature Irradiation ◽  
Optimized Model ◽  
Passive Solar

This study was carried out to optimize a computational model of a new underground passive solar greenhouse to improve thermal performance, storage, and saving of heat solar energy. Optimized and conventional passive solar greenhouse were compared in regards of indoor air temperature, irradiation, and energy demand. Six different materials were used in the conventional model. In addition, TRNSYS software was employed to determine heat demand and irradiation in the greenhouse. The results showed that the annual total heating requirement in the optimized model was 30% lower than a conventional passive solar system. In addition, the resulting average air temperature in the optimized model ranged from −4 to 33.1 °C in the four days of cloud, snow, and sun. The average air temperature in the conventional passive solar greenhouse ranged from −8.4 to 24.7 °C. The maximum monthly heating requirement was 796 MJ/m2 for the Wtype87 model (100-mm lightweight concrete block) and the minimum value was 190 MJ/m2 for the Wtype45 model (50-mm insulation with 200-mm clay tile) in a conventional passive solar greenhouse while the monthly heating requirement estimated 126 MJ/m2 for the optimized greenhouse model. The predictability of the TRNSYS model was calculated with a coefficient of determination (R2) of 95.95%.

Agent Based Modelling to Improve Comfort and Save Energy in the Built Environment

2008 ◽  
Author(s):  
Wim Zeiler ◽  
Gert Boxem ◽  
Rinus van Houten ◽  
Joep van der Velden ◽  
Willem Wortel ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Built Environment ◽  
Control Strategy ◽  
Energy Demand ◽  
Building Design ◽  
Research Centre ◽  
Control Technology ◽  
Indoor Climate ◽  
Climate Control ◽  
Reduce Energy Consumption

In Europe comfort in buildings needs 40% of the total energy. With effects of Global warming becoming more and more apparent there is a need to reduce this energy demand by comfort within the built environment. In comfort control strategy there is an exciting development based on inclusive design: the user’s preferences and their behaviour have become central in the building services control strategy. Synergy between end-user and building is the ultimate in the intelligent comfort control concept. This new comfort control technology is based on the use of agent technology and can further reduce energy consumption of buildings while at the same time improve individual comfort. The TU/e (Technische Universiteit Eindhoven) together with Kropman and ECN (Energy research Centre Netherlands) work together in the research for user based preference indoor climate control technology. Central in this approach is the user focus of the whole building design process which makes it possible to reduce energy consumption by tuning demand and supply of the energy needed to fulfill the comfort demand of the occupants building.

scholarly journals Climate Adaptability of Old and New House in Bushehr's Historical Texture

2020 ◽  
Vol 16 (2) ◽  
pp. 249-258
Author(s):  
Nadiya Mozafari ◽  
Masoud Alimardani
Keyword(s):  
Energy Consumption ◽  
Human Life ◽  
Air Conditioner ◽  
Climate Conditions ◽  
Air Conditioners ◽  
Traditional Design ◽  
Climate Adaptability ◽  
Reduce Energy Consumption ◽  
New Buildings ◽  
Climate Comfort

AbstractThe port of Bushehr, with its valuable and unique historical texture, completely matches with its unbearable climate conditions. Over hundreds of years, the port has provided an appropriate ground for human life as no air conditioner is needed there. Unfortunately, this valuable old texture has been destroyed inadvertently. New buildings in the port are just superficial copies of the old buildings’ external surfaces, with no attention to their goal, i.e., the provision of thermal comfort for inhabitants. The new buildings are dramatically increasing without considering the historical texture and climate. As a result, the inhabitants have to use air conditioners in most months continuously; hence, there would be an increase in energy consumption and a disruption in climate balance. This study has been conducted to compare the compatibility of such architecture with the climate and its success in providing climate comfort for the inhabitants. According to the information obtained from the study, the old houses built more than 100 years ago using traditional design had better performance in adaptability with climate. Accordingly, the exploitation of traditional instructions and patterns in a new format would largely reduce energy consumption in hot seasons and eliminate the need for heating in cold seasons. In this regard, a huge amount of energy is saved, resulting in less damage to the environment.

An Innovative Technique of Electricity Generation and Use of Washing Machine by Treadmill

2021 ◽  
Vol 9 (VI) ◽  
pp. 209-213
Author(s):  
Adarsh Rai
Keyword(s):  
Electric Power ◽  
Energy Demand ◽  
Electricity Generation ◽  
Human Life ◽  
Energy Resources ◽  
Washing Machine ◽  
Energy Demands ◽  
Generating Method ◽  
Innovative Idea ◽  
Day By Day

hence, the basic needs of human life are power, hence the demand of electricity generating method is increasing day by day. It can manipulate development any country of a world. Now, for developing electric power generation we have implemented an innovative idea of generating electricity from the use of the specially designed treadmill with the new specially designed washing machine, which will work when a human being runs over a treadmill for exercise, which is an integral part of modern digital society. India is a developing country because of it has limited resources. In India, most of the energy sources are diminishing day by day. On the other hand, conventional energy resources are responsible for pollution and global warming. That is why we need a non-conventional energy source to develop electric power generating which is eco-friendly, clean and sustainable. Increasing population of the world is also a major factor of increase in energy demand that is why scientists are exploring major and minor energy resources to fulfill energy demands

Building Energy-Saving Technology

2012 ◽  
Vol 472-475 ◽  
pp. 469-472 ◽  
Author(s):  
Bing Nan Liu ◽  
Qiong He
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Building Energy ◽  
Living Standard ◽  
External Wall ◽  
Building Energy Saving ◽  
Energy Saving Technology ◽  
Reduce Energy Consumption ◽  
Day By Day

With the improvement of people's living standard, the building energy consumption is increasing day by day. In order to reduce energy consumption, we should develop energy-saving building and analyze building energy saving technology. This article mainly introduces three kinds of energy saving technology which include the external wall thermal insulation technology, doors and Windows energy saving technology and roof insulation technology.

Assessment of the Life Cycle Energy Efficiency of a Primary School Building in Turkey

2019 ◽  
Vol 887 ◽  
pp. 335-343
Author(s):  
Nazanin Moazzen ◽  
Mustafa Erkan Karaguler ◽  
Touraj Ashrafian
Keyword(s):  
Energy Efficiency ◽  
Life Cycle ◽  
Energy Consumption ◽  
Energy Demand ◽  
Energy Use ◽  
Human Life ◽  
Energy Performance ◽  
Building Envelope ◽  
Embodied Energy

Energy efficiency has become a crucial part of human life, which has an adverse impact on the social and economic development of any country. In Turkey, it is a critical issue especially in the construction sector due to increase in the dependency on the fuel demands. The energy consumption, which is used during the life cycle of a building, is a huge amount affected by the energy demand for material and building construction, HVAC and lighting systems, maintenance, equipment, and demolition. In general, the Life Cycle Energy (LCE) needs of the building can be summarised as the operational and embodied energy together with the energy use for demolition and recycling processes.Besides, schools alone are responsible for about 15% of the total energy consumption of the commercial building sector. To reduce the energy use and CO2 emission, the operational and embodied energy of the buildings must be minimised. Overall, it seems that choosing proper architectural measures for the envelope and using low emitting material can be a logical step for reducing operational and embodied energy consumptions.This paper is concentrated on the operating and embodied energy consumptions resulting from the application of different architectural measures through the building envelope. It proposes an educational building with low CO2 emission and proper energy performance in Turkey. To illustrate the method of the approach, this contribution illustrates a case study, which was performed on a representative schoold building in Istanbul, Turkey. Energy used for HVAC and lighting in the operating phase and the energy used for the manufacture of the materials are the most significant parts of embodied energy in the LCE analyses. This case study building’s primary energy consumption was calculated with the help of dynamic simulation tools, EnergyPlus and DesignBuilder. Then, different architectural energy efficiency measures were applied to the envelope of the case study building. Then, the influence of proposed actions on LCE consumption and Life Cycle CO2 (LCCO2) emissions were assessed according to the Life Cycle Assessment (LCA) method.

scholarly journals Effect of Atrium Compare to Courtyard on Energy Demand and Daylight in Row Housed in Toronto

2021 ◽  
Author(s):  
Tamanna Kabir
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Cold Climates ◽  
Floor Area ◽  
Large Window ◽  
Interior Spaces ◽  
Reduce Energy Consumption ◽  
Daylight Performance ◽  
Row Houses

Row houses in cold climates with increased shared wall for energy efficiency, suffer from darker interior spaces. Addition of courtyards can solve this problem to some extent, but courtyards are responsible for higher energy consumption during winter. This study investigates an alternative option, i.e. converting courtyard into atrium during winter for assessing its energy and daylight performance in row houses in Toronto. Results are determined by using Design Builder software. Research shows, during winter atrium options in row houses can reduce energy consumption compared to courtyard, but at the same time daylit floor area above target illuminance is also reduced. However, bigger courtyard having large window to wall ratio, clear glazing for courtyard windows and low e coated glazing for skylight can create a balance between increased energy consumption and decreased daylighting inside the house to maximize the benefits from converting courtyard into atrium during winter in Toronto row houses.

Thermal Performance of a Shape-Stabilized Phase Change Material Floor with Different Heating Positions

2016 ◽  
Vol 717 ◽  
pp. 62-67 ◽  
Author(s):  
Bin Zhang ◽  
Qin He Sun ◽  
Wei Tong Liu
Keyword(s):  
Thermal Conductivity ◽  
Energy Consumption ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Performance ◽  
The Other ◽  
New Type ◽  
Reduce Energy Consumption ◽  
Change Material ◽  
Melting Degree

An effective method to reduce energy consumption for heating a building is by incorporating shape–stabilized phase change material (SSPCM) in building floors. In this study, a new type of SSPCM with increased thermal conductivity is formulated through a self–established experimental device. A model to analyze the thermal performance of the SSPCM floor is developed. The model is used to analyze the thermal performance of the SSPCM floor with two heating positions, one at the bottom and the other in the middle of the SSPCM. Results show that when the heating position is in the middle of the SSPCM, the melting speed is faster and the melting degree of SSPCM is larger than when it is at the bottom.

scholarly journals Effect of Atrium Compare to Courtyard on Energy Demand and Daylight in Row Housed in Toronto

2021 ◽  
Author(s):  
Tamanna Kabir
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Demand ◽  
Cold Climates ◽  
Floor Area ◽  
Large Window ◽  
Interior Spaces ◽  
Reduce Energy Consumption ◽  
Daylight Performance ◽  
Row Houses

Row houses in cold climates with increased shared wall for energy efficiency, suffer from darker interior spaces. Addition of courtyards can solve this problem to some extent, but courtyards are responsible for higher energy consumption during winter. This study investigates an alternative option, i.e. converting courtyard into atrium during winter for assessing its energy and daylight performance in row houses in Toronto. Results are determined by using Design Builder software. Research shows, during winter atrium options in row houses can reduce energy consumption compared to courtyard, but at the same time daylit floor area above target illuminance is also reduced. However, bigger courtyard having large window to wall ratio, clear glazing for courtyard windows and low e coated glazing for skylight can create a balance between increased energy consumption and decreased daylighting inside the house to maximize the benefits from converting courtyard into atrium during winter in Toronto row houses.

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