A study on the Contamination of Microbial in a Geothermal Exchanger Pipe by Lab-experiment

Recently, since global warming has continued, reduction of greenhouse gas CO2 is required. CO2 emissions in the civil area sectors in Japan account for approximately 30%, which is about one-third of the whole of Japan. Therefore, reduction of energy consumption in houses, office and etc. is obviously required. In order to reduce energy consumption of buildings, high-efficiency of machinery, high-insulation, high-airtightness, and use of renewable energy are mentioned. Especially, use of geothermal energy which has almost constant temperature throughout the year has been drawing attention. However, in case of geothermal ventilation system, a fungi, dust, pollen and etc. derived from the outside air are taken directly into the pipe. It is concerned that they cause contamination inside the pipes and breeding of molds, which may lead to odors. The present study analyzed the contamination degree of the pipe surface in the geothermal ventilation system and proposed cleaning frequency in the pipe, cleaning method and so on.

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Design and Technical Analysis of HVAC Ventilation System in Green Building

E3S Web of Conferences ◽

10.1051/e3sconf/202126103039 ◽

2021 ◽

Vol 261 ◽

pp. 03039

Author(s):

Jiawen Zhang

Keyword(s):

Energy Consumption ◽

Environmental Pollution ◽

Construction Projects ◽

Ventilation System ◽

Tall Buildings ◽

Green Building ◽

Green Energy ◽

Efficient Operation ◽

Design Requirements ◽

Reduce Energy Consumption

In recent years, the construction industry has developed rapidly, and there are more and more urban construction projects. The corresponding design requirements for HVAC systems are also getting higher and higher. HVAC has been widely used in all kinds of buildings. While providing convenience for people, environmental pollution has gradually become a topic of concern for people. Therefore, when designing the HVAC system, HVAC not only meets the needs of customers, but also uses green energy saving technology to reduce energy consumption as far as possible. Reduce environmental pollution, so that the HVAC ventilation system of tall buildings can be in a stable and efficient operation state. Improve the operation effect of air conditioning, while reducing energy consumption.

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Estimated potential for energy savings in heating residential buildings in Poland

E3S Web of Conferences ◽

10.1051/e3sconf/20184900068 ◽

2018 ◽

Vol 49 ◽

pp. 00068 ◽

Cited By ~ 1

Author(s):

Piotr Lis

Keyword(s):

Energy Consumption ◽

Energy Savings ◽

Residential Buildings ◽

Dominant Role ◽

Ventilation System ◽

Energy Effect ◽

Central Statistical ◽

The Face ◽

Central Statistical Office ◽

Reduce Energy Consumption

In the face of a constant increase in demand for energy, one of the important sources will be its saving and efficient use. The search for the greatest opportunities in this area should focus on the areas where the highest energy consumption occurs. The dominant role here is played by the communal and living sector, to the extent that it is the sub-sector of buildings with a majority share of residential buildings. The article presents the expected energy effects of measures reducing energy consumption for heating residential buildings in the whole country. The author used statistical data of the Central Statistical Office available in the database of this institution. These data were identified and searched for as suitable for the purposes of this article and were used as a basis for calculations and analyses. The calculations show that only thanks to simple actions such as improvement of thermal insulation of envelope components it is possible to reduce energy consumption for heating of residential buildings by over 70% in relation to the situation in 2011. The potential energy effect will also translate into an economic and environmental effect. Qualitative measures such as improving the performance of the heating and ventilation system of a building and/or changing the energy carrier will also reduce energy consumption for this purpose, but they are not the subject of this study.

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A Novel Clustering Approach in Wireless Sensor Network Using Genetic Algorithm and Fuzzy Logic

Insight - Electronic ◽

10.18282/ie.v1.i2.234 ◽

2019 ◽

Vol 1 (2) ◽

Author(s):

Fatemehzahra Gholami Tirkolaei ◽

Faramarz E. Seraji

Keyword(s):

Fuzzy Logic ◽

Energy Consumption ◽

Wireless Sensor Network ◽

Sensor Network ◽

Sensor Nodes ◽

Wireless Sensor ◽

Main Challenge ◽

Clustering Approach ◽

Reduce Energy Consumption ◽

Reduction Of Energy Consumption

Wireless sensor network consists of hundred or thousand sensor nodes that are connected together and work simultaneously to perform some special tasks. The restricted energy of sensor nodes is the main challenge in wireless sensor network as node energy depletion causes node death. Therefore, some techniques should be exerted to reduce energy consumption in these networks. One of the techniques to reduce energy consumptions most effectively is the use of clustering in wireless sensor networks.There are various methods for clustering process, among which LEACH is the most common and popular one. In this method, clusters are formed in a probabilistic manner. Among clustering strategies, applying evolutional algorithm and fuzzy logic simultaneously are rarely taken into account. The main attention of previous works was energy consumption and less attention was paid to delay.In the present proposed method, clusters are constructed by an evolutional algorithm and a fuzzy system such that in addition to a reduction of energy consumption, considerable reduction of delay is also obtained. The simulation results clearly reveal the superiority of the proposed method over other reported approaches.

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ANALISIS PENERAPAN GREEN COMPUTING PADA PERGURUAN TINGGI BERBASIS TEKNOLOGI INFORMASI

Jurnal Ilmiah Matrik ◽

10.33557/jurnalmatrik.v21i3.719 ◽

2019 ◽

Vol 21 (3) ◽

pp. 184-193

Author(s):

Klaudius Jevanda BS ◽

Marcelius Michael Livinus

Keyword(s):

Information Technology ◽

Energy Consumption ◽

Environmental Pollution ◽

Co2 Emissions ◽

Carbon Footprint ◽

Environmentally Friendly ◽

Academic Community ◽

Green Computing ◽

Reduce Energy Consumption ◽

Reduction Of Energy Consumption

Abstract : This study aims to determine the level of application of green computing at the Universitas Katolik Musi Charitas Palembang and recommend strategies in implementing green computing. Where green computing itself is the study and realization of the use of computing resources efficiently and environmentally friendly. The purpose of green computing is to increase the efficiency of use and reduce energy consumption and carbon footprint. Universitas Katolik Musi Charitas Palembang has long been using Information Technology (IT), one of which is a computer to support the ongoing process of the academic community. But the use of computers unwittingly provides a big role in environmental pollution and CO2 emissions. Based on the results of research that still needs to be socialized about understanding the importance of management and utilization in the use of IT equipment and policies to support the reduction of energy consumption and environmental pollution.

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Green Buildings Amid Efficiency and Sustainability

Solar Energy and Sustainable Development ◽

10.51646/jsesd.v3i1.49 ◽

2021 ◽

Vol 3 (1) ◽

Author(s):

Yosof M Khalifa ◽

Salah M Mady

Keyword(s):

Energy Consumption ◽

Large Scale ◽

Green Building ◽

Wide Range ◽

The World ◽

Reduce Energy Consumption ◽

Reduction Of Energy Consumption ◽

Building Life Cycle ◽

Building Operation ◽

Made In

The vast increase of energy consumption, global warming and the harm they cause to the environment, emerge to be a major obstruction that distresses the world today. The current work views one of the methods that the world focused on as means of reducing the environmental harms and that is, through green building, or in more common words sustainable buildings. Those means, covers the exercising of a wide range of applications including merging of new and specific technologies in which through fulfilling its basis, the process of evaluation of the building takes place in terms of its harmony with the environment, reduction of energy consumption, and the reduction of the environmental problems caused by the building life cycle starting from defining of location, design of the building, operation, maintenance, repairing and up to the renewal of the building. Despite the significance of green building, no profit nor implementations has yet been made in Libya. The latter is due to the lack of awareness by many Libyan social groups. From here, the idea behind this paper crystalized. It aims to spread and enhance the knowledge and techniques of green building. It also penetrates into the green building features and advantages that are considered to be a preliminary step to start its application in a wide range coinciding with the grand progress that the country has witnessed in the field of construction and housing. This paper concludes that it is possible to reduce energy consumption and the harm it causes to the environment after the implementation and merging of green building techniques and should be applied on a large scale covering the whole country.

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Research on Best Solution for Improving Indoor Air Quality and Reducing Energy Consumption in a High-Risk Radon Dwelling from Romania

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph182312482 ◽

2021 ◽

Vol 18 (23) ◽

pp. 12482

Author(s):

Ion-Costinel Mareș ◽

Tiberiu Catalina ◽

Marian-Andrei Istrate ◽

Alexandra Cucoș ◽

Tiberius Dicu ◽

...

Keyword(s):

Energy Efficiency ◽

Energy Consumption ◽

Air Quality ◽

Indoor Air Quality ◽

Indoor Air ◽

Heat Recovery ◽

Natural Ventilation ◽

High Efficiency ◽

Ventilation System ◽

Radon Level

The purpose of this article is the assessment of energy efficiency and indoor air quality for a single-family house located in Cluj-Napoca County, Romania. The studied house is meant to be an energy-efficient building with thermal insulation, low U-value windows, and a high efficiency boiler. Increasing the energy efficiency of the house leads to lower indoor air quality, due to lack of natural ventilation. As the experimental campaign regarding indoor air quality revealed, there is a need to find a balance between energy consumption and the quality of the indoor air. To achieve superior indoor air quality, the proposed mitigation systems (decentralized mechanical ventilation with heat recovery combined with a minimally invasive active sub-slab depressurization) have been installed to reduce the high radon level in the dwelling, achieving an energy reduction loss of up to 86%, compared to the traditional natural ventilation of the house. The sub-slab depressurization system was installed in the room with the highest radon level, while the local ventilation system with heat recovery has been installed in the exterior walls of the house. The results have shown significant improvement in the level of radon decreasing the average concentration from 425 to 70 Bq/m 3, respectively the carbon dioxide average of the measurements being around 760 ppm. The thermal comfort improves significantly also, by stabilizing the indoor temperature at 21 °C, without any important fluctuations. The installation of this system has led to higher indoor air quality, with low energy costs and significant energy savings compared to conventional ventilation (by opening windows).

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STUDY OF THE INFLUENCE OF COVERINGS OF EXTENDED RADIATING PIPES ON THEM HEAT RADIATION, WHEN HEATING LARGE OBJECTS AND HEATING INDUSTRIAL ROOMS

Energy Technologies & Resource Saving ◽

10.33070/etars.2.2020.03 ◽

2020 ◽

pp. 19-26

Author(s):

V.S. Pikashov ◽

L.N. Trotsenko ◽

T.V. Vinogradova ◽

V.A. Velikodny

Keyword(s):

High Efficiency ◽

Thermal Inertia ◽

Heating System ◽

Heat Radiation ◽

Environmental Friendliness ◽

Pipe Surface ◽

Capital Costs ◽

System A ◽

Separate Room ◽

Easy Operation

It is shown that for heating rooms and objects large in length and volume, the use of extended emitting pipes is most appropriate. A method for heating extended objects is described, in which the principle of radiation from radiating pipes with a length of more than 30 m is used in a garage-defroster of railway cars. The heating system of the garage-defroster includes a firebox-heat generator, long pipes of 90 m along the wagons, the control and instrumentation system A. The firebox and the control and instrumentation cabinets are installed in a separate room. The defrost system circuit is essentially a large emitter. The entire heat-radiating circuit is a closed system of direct and return pipes through which a low-temperature (300–400 °C) coolant circulates. The industrial operation of such a system at one of the Ukrainian factories has confirmed the advantages in comparison with the known defrosting systems: reliability, easy operation, high efficiency, safety and environmental friendliness, low capital costs, a minimum of instrumentation and automation, minimal thermal inertia. Ways of increasing the uniformity of temperature and heat radiation from pipes are considered: recirculation of the coolant in the working circuit and applying coatings with different emissivity to the pipe surface. So, with a recirculation rate of the coolant in the working circuit of the industrial defrosting system from 3 to 5, the temperature difference between the surface of the emitting pipes at the first and distant cars was 100 or more degrees. Therefore, cars that are closer to the coolant entrance to the system defrosted faster than others. Two new methods for controlling the radiation intensity of long pipes along their length are proposed: coating coatings with different emissivity on the surface of pipes and coating with maximum and minimum emissivity, which alternate between themselves, around the perimeter of the rings. The results of laboratory experiments on the dependence of the heat radiation of pipes on the methods of applying special coatings to them are shown, which showed that coating in a certain order allows you to change the nature of the distribution of temperatures and heat radiation on surrounding surfaces, significantly reducing their decrease along the length of the radiating pipe. Ref. 18, Fig. 4.

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Green Cloud and reduction of energy consumption

Computer Engineering and Applications Journal ◽

10.18495/comengapp.v4i1.119 ◽

2015 ◽

Vol 4 (1) ◽

pp. 51-60

Author(s):

Kamyab Khajehei

Keyword(s):

Energy Consumption ◽

Data Centers ◽

Cloud Data ◽

Active Devices ◽

High Efficient ◽

Efficient Data ◽

Cloud Data Centers ◽

Reduce Energy Consumption ◽

Green Cloud ◽

Reduction Of Energy Consumption

By using global application environments, cloud computing based data centers growing every day and this exponentially grows definitely effect on our environment. Researchers that have a commitment to their environment and others which was concerned about the electricity bills came up with a solution which called â€œGreen Cloudâ€. Green cloud data centers based on how consume energy are known as high efficient data centers. In green cloud we try to reduce number of active devices and consume less electricity energy. In green data centers toke an advantage of VM and ability of copying, deleting and moving VMs over the data center and reduce energy consumption. This paper focused on which parts of data centers may change and how researchers found the suitable solution for each component of data centers. Also with all these problems why still the cloud data centers are the best technology for IT businesses.

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Distributed Learning Algorithm Applications to the Scheduling of Wireless Sensor Networks

Mobile Computing and Wireless Networks ◽

10.4018/978-1-4666-8751-6.ch045 ◽

2016 ◽

pp. 1049-1081

Author(s):

Fatemeh Daneshfar ◽

Vafa Maihami

Keyword(s):

Energy Consumption ◽

Learning Strategy ◽

Learning Algorithm ◽

Wireless Sensor ◽

Expected Return ◽

Wireless Medium ◽

Reduce Energy Consumption ◽

Reduction Of Energy Consumption ◽

Return Value

Wireless Sensor Network (WSN) is a network of devices denoted as nodes that can sense the environment and communicate gathered data, through wireless medium to a sink node. It is a wireless network with low power consumption, small size, and reasonable price which has a variety of applications in monitoring and tracking. However, WSN is characterized by constrained energy because its nodes are battery-powered and energy recharging is difficult in most of applications. Also the reduction of energy consumption often introduces additional latency of data delivery. To address this, many scheduling approaches have been proposed. In this paper, the authors discuss the applicability of Reinforcement Learning (RL) towards multiple access design in order to reduce energy consumption and to achieve low latency in WSNs. In this learning strategy, an agent would become knowledgeable in making actions through interacting with the environment. As a result of rewards in response to the actions, the agent asymptotically reaches the optimal policy. This policy maximizes the long-term expected return value of the agent.

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