scholarly journals A Review of the Methods of Modeling Multi-Phase Flows within Different Microchannels Shapes and Their Applications

Micromachines ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1113
Author(s):  
Awatef Abidi ◽  
Amir Ahmadi ◽  
Mojtaba Enayati ◽  
S. Mohammad Sajadi ◽  
Hooman Yarmand ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Fluid Flow ◽  
Energy Efficient ◽  
Industrial Processes ◽  
Working Fluid ◽  
Design Strategies ◽  
Different Types ◽  
Review Study ◽  
Save Energy ◽  
Multi Phase

In industrial processes, the microtechnology concept refers to the operation of small devices that integrate the elements of operational and reaction units to save energy and space. The advancement of knowledge in the field of microfluidics has resulted in fabricating devices with different applications in micro and nanoscales. Micro- and nano-devices can provide energy-efficient systems due to their high thermal performance. Fluid flow in microchannels and microstructures has been widely considered by researchers in the last two decades. In this paper, a review study on fluid flow within microstructures is performed. The present study aims to present the results obtained in previous studies on this type of system. First, different types of flows in microchannels are examined. The present article will then review previous articles and present a general summary in each section. Then, the multi-phase flows inside the microchannels are discussed, and the flows inside the micropumps, microturbines, and micromixers are evaluated. According to the literature review, it is found that the use of microstructures enhances energy efficiency. The results of previous investigations revealed that the use of nanofluids as a working fluid in microstructures improves energy efficiency. Previous studies have demonstrated special attention to the design aspects of microchannels and micro-devices compared to other design strategies to improve their performance. Finally, general concluding remarks are presented, and the existing challenges in the use of these devices and suggestions for future investigations are presented.

Energy Design by Evolution: Applying Evolutionary Computing to Energy Efficient Architectural Design

2014 ◽  
Vol 899 ◽  
pp. 120-125
Author(s):  
Bernhard Sommer ◽  
Ulrich Pont
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Architectural Design ◽  
Evolutionary Computing ◽  
Environmental Data ◽  
Design Strategies ◽  
Energy Efficient Buildings ◽  
Optimum Solution

In this paper, the authors want to show a method that allows customizing energy efficient buildings to the very task and to the very site by linking environmental data and design strategies through algorithmic processes. An optimum solution for the energy efficiency of a building can then be found by running an evolutionary solver.

Energy efficiency in housing and socio-economic development in Nigeria

2019 ◽  
pp. 238-243
Author(s):  
Albert Olotuah A ◽  
Rukayyatu Tukur B ◽  
Kingsley Dimuna O ◽  
Abiodun Olotuah O ◽  
Olutunde Adesiji S ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Economic Development ◽  
Energy Efficient ◽  
Residential Buildings ◽  
Electricity Consumption ◽  
Electricity Supply ◽  
Low Carbon ◽  
Design Strategies ◽  
Energy Efficient Buildings ◽  
Socio Economic Development

Energy efficient houses consume less energy while maintaining or improving the comfort conditions of occupants. Energy efficient buildings result in less environmental impact and are economically and environmentally sustainable. Residential buildings account for the majority of electricity consumption in Nigeria. Because of the poor state of energy generation and transmission in Nigeria energy efficiency measures are necessary to reduce the energy required in houses. This would substantially reduce the dependence on the grid electricity supply. Energy efficient buildings have tremendous benefits in social, economic, and environmental terms. In economic terms the production of energy-efficient buildings result in growing market demand with higher quality and innovative buildings, and in social terms it leads to improved urban space and local climate, and liveable buildings. Energy efficient buildings also ensure resource efficiency, and reduction of Green House Gas emissions. Energy efficiency in buildings starts from the design of buildings, and through to construction and operation. The objective of this paper is the examination of energy efficiency in housing in Nigeria and its impact upon socio-economic development in the country. The paper focuses on energy-efficient design strategies, and initiatives to achieve low carbon emission in housing in Nigeria The paper examines the housing situation in Nigeria and the phenomenon of urbanisation which has led to unplanned urban growth, grievous housing poverty, slum formation, and near collapse of urban services and infrastructure particularly electricity supply. It affirms the need to adopt energy efficiency in housing and it examines passive design strategies and low carbon initiatives in housing construction. It takes a critical look at the adoption of sustainability practices in housing. The paper asserts that energy efficiency would enhance the growth of electricity consumption and boost the socio-economic development of the country. The paper concludes that energy efficiency is capable of engendering socio-economic development of the country particularly productivity and income growth.

Energy Efficiency Design Strategies for Greenhouse in Colorado

2012 ◽  
Author(s):  
Byung Chang Kwag ◽  
Moncef Krarti
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Efficient ◽  
Climatic Conditions ◽  
Design Strategies ◽  
Climate Conditions ◽  
Agricultural Industry ◽  
Heating Systems ◽  
Outdoor Climate ◽  
Reduce Energy Consumption

A basic principle of well designed greenhouse design emphasizes the utilization of solar energy as much as possible to grow the plants indoors during extreme outdoor climate conditions. Greenhouses can use significant amount of energy due to several factors including poor envelope design, inappropriate maintenance practices, and heavy reliance on fuel-based heating systems. In order to reduce energy consumption in the agricultural industry of Colorado, it is important to design energy efficient greenhouses under Colorado climatic conditions.

scholarly journals A New Resources Provisioning Method Based on QoS Differentiation and VM Resizing in IaaS

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Rongdong Hu ◽  
Guangming Liu ◽  
Jingfei Jiang ◽  
Lixin Wang
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Resource Provisioning ◽  
Application Performance ◽  
Qos Differentiation ◽  
Different Types ◽  
Speed Up ◽  
Google Cluster Trace ◽  
Real Time Application ◽  
Host Resource

In order to improve the host energy efficiency in IaaS, we proposed an adaptive host resource provisioning method, CoST, which is based on QoS differentiation and VM resizing. The control model can adaptively adjust control parameters according to real time application performance, in order to cope with changes in load. CoST takes advantage of the fact that different types of applications have different sensitivity degrees to performance and cost. It places two different types of VMs on the same host and dynamically adjusts their sizes based on the load forecasting and QoS feedback. It not only guarantees the performance defined in SLA, but also keeps the host running in energy-efficient state. Real Google cluster trace and host power data are used to evaluate the proposed method. Experimental results show that CoST can provide performance-sensitive application with a steady QoS and simultaneously speed up the overall processing of performance-tolerant application by 20~66%. The host energy efficiency is significantly improved by 7~23%.

scholarly journals Geoenergy assessment of forest ecosystems of Transnistria

2018 ◽  
Keyword(s):  
Energy Efficiency ◽  
Energy Saving ◽  
Energy Efficient ◽  
Forest Ecosystems ◽  
Energy Potential ◽  
Forest Environment ◽  
Energy Unit ◽  
Natural Systems ◽  
The Republic ◽  
Save Energy

On the basis of the proposed geoenergy approach, the energy efficiency of forestry and ecosystems of the Transnistrian Moldavian Republic in a single energy unit – joules has been studied. Relevance of the study is explained by the fact that the energy crisis in the 1970s has dramatically increased interest in the problem of energy consumption and energy saving. Despite the calls and practice of energy saving over a hundred years, the specific energy costs increased by 8-10 times. All these data indicate the need to introduce energy-efficient technologies of environmental management in all spheres of human activity. The geoenergy approach allows us to identify ways to optimize functioning of the forest ecosystems of Transnistria. The existing practice of forestry enterprises of the Republic leads to the destructive use of natural resources and the loss of oak plantations – the main forest-forming species of Transnistria. The final product of the enterprises is the volume of wood and not full restoration on a natural type of forests. The basis for the sustainable development model of the forest ecosystem of Transnistria is energy-efficient reforestation technology. Based on studies conducted in the Kalagur tract the article describes a technique for laying oak plantation by planting two-year seedlings (automated and manually) using forest environment, maternal spaces and the elements of natural regeneration associated rocks and shrubs. The use of mechanization is minimal in this reforestation technology and the use of the forest environment of the mother plantings is maximal. The energy intensity of the proposed reforestation technology is 0.004, which is several times lower than other reforestation technologies used in the country. The studies carried out in the Kalagur tract have also made it possible to assess the energy potential of forest ecosystems and the energy efficiency of forest management throughout the country. The proposed technology of optimization of forest ecosystems functioning allows not only to increase the energy potential of the forest, but also to create highly productive forests, valuable from economic and environmental points of view. In a promising energy-saving model of reforestation with minimal use of mechanization and other types of work we not only save energy (the cost of mechanization, fuel and labor), but also preserve the biodiversity of natural systems and increase the use of solar energy and precipitation.

scholarly journals Different Façade Types and Building Integration in Energy Efficient Building Design Strategies

2021 ◽  
Vol 8 (2) ◽  
pp. 49-61
Author(s):  
Muammer Yaman
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Natural Ventilation ◽  
Building Design ◽  
Outdoor Environment ◽  
Efficient Design ◽  
Design Strategies ◽  
Building Facade ◽  
Indoor Comfort ◽  
The Impact

Building façades play a major role in improving the effects of outdoor environment conditions on indoor comfort conditions. Façades, which are designed as energy efficiency, are created according to different performance parameters and can offer solutions appropriate for the climatic condition. This paper aims to describe and highlight the role of design and application determinants in building façade types according to energy efficiency in different climatic classes. For this purpose, 12 building façade types in different climate types were investigated and analyzed by a purposive or judgmental sampling technique. Façade analyses have been carried out by considering double skin, adaptive, photovoltaic panel, vertical green, media and structural membrane façades created as a result of developing technological opportunities. Balance of heat loss and gain, preventing overheating, providing daylight and natural ventilation, active and mechanical solutions for climate-sensitive, noise control, recycling and evaluating the initial investment cost are presented. With examinations, it has been determined that different façade systems are innovative construction systems in creating energy efficiency. It has been concluded that the effect of improving indoor comfort conditions of the building by controlling the outdoor environment conditions with the construction of different facade systems is very important in the architectural process. With the development of technology and smart systems, the impact of the façades on the climate analysis and energy efficient design strategies will be much more important in the future

scholarly journals A Review on Building Energy Efficiency Techniques

2018 ◽  
Vol 7 (4.35) ◽  
pp. 35 ◽  
Author(s):  
Abbas M. Al-Ghaili ◽  
Hairoladenan Kasim ◽  
Marini Othman ◽  
Zainuddin Hassan
Keyword(s):  
Energy Efficiency ◽  
Interior Design ◽  
Energy Use ◽  
Building Energy ◽  
Building Energy Efficiency ◽  
Light Control ◽  
Different Types ◽  
Save Energy ◽  
High Level ◽  
Published Research

This paper highlights a number of recently published research studies during last five years in order to provide a summary related to latest trends of energy efficiency in the smart buildings technology. It reviews numerous technical methods applied to achieve a high level of Building Energy Efficiency (BEE). In this paper, methods applied to measure the BEE and to predict the energy-use have been considered and reviewed. Furthermore, some other methods discussed in articles which consider retrofitting of interior design of buildings have been taken. One of the most impacts that has been considered is the light control system because it directly affects the energy use. This paper has reviewed different types of techniques that save energy consumptions such as predictive techniques of energy use, Internet of Things (IoT) buildings, light control systems inside buildings, and Quick Response (QR) code based services used to notify occupants for energy-use. It has provided a simple comparison between different techniques used to retrofit the interior design of buildings due to its high importance in saving energy. The paper has also recommended suitability of methods taking into account the existing situation, design, limitations, and conditions of the building being studied.

scholarly journals The “rebound effect” of energy efficient actions to be performed as part of a major renovation of apartment buildings

2021 ◽  
pp. 44-48
Author(s):  
Valeriy Mishchenko ◽  
Elena Gorbaneva ◽  
Elena Ovchinnikova
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Rebound Effect ◽  
Environmental Safety ◽  
Assessment Method ◽  
Energy Efficiency Improvement ◽  
Different Types ◽  
New Energy ◽  
Individual Household ◽  
The Impact

Environmental safety and the rational use of natural resources are among pressing present-day problems. Energy efficiency improvement is an important constituent of energy policies in many countries. This article examines the impact of the “rebound effect” on improving the energy efficiency of environmental safety programs implement-d at federal and municipal levels. There is still no consensus on how to take the “rebound effect” into account and whether it should be considered at all. Paradoxically, the “rebound effect” is the unintended side effect of energy efficiency activities. In this paper, different types of this effect are considered. The “direct assessment” method, based on the non-linear relationship between energy consumption and efficiency, is used to assess the “rebound effect” produced on individual household appliances. The factors hindering the implementation of energy efficiency activities are also identified. Having analyzed the impact of the effect on different sectors of economy, we can conclude that the most pronounced “rebound effect” is observed in the housing sector. Consequently, if we consider a major energy efficient renovation, we have to take account of the “rebound effect” caused by new energy saving activities.

Low Power Adiabetic Logic System for Biomedical Applications

2021 ◽  
Vol 11 (12) ◽  
pp. 3123-3132
Author(s):  
M. Mailsamy ◽  
V. Rukkumani ◽  
K. Srinivasan
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Low Power ◽  
Medical Devices ◽  
Energy Efficient ◽  
Biomedical Applications ◽  
Cmos Inverter ◽  
Adiabatic Logic ◽  
Implanted Medical Devices ◽  
Multi Phase

There have been significant advances in sensors and device structures in the medical industry, particularly in implanted medical devices. Increasingly complex electronic circuitry may now be implanted in the human body thanks to compact, high-energy batteries and hermetic packaging. These gadgets must adhere to strict power consumption guidelines due to the battery recharging schedule. Designing energy-efficient circuits and systems becomes increasingly important as a result of this fact. Adiabatic circuits provide a hopeful alternative for traditional circuitry in case of low energy design. Because of power-clock phases synchronization complexity, designing and functionally verifying presenting 4-phase adiabatic circuitry takes longer. Accordingly, multiple clock generators are used typically and can reveal enhanced consumption of energy in the network of clock distribution. Furthermore, they are not suitable for designing in high-speed because of their clock skew management and high complexity issues. In this paper, TMEL (True multi-phase energy recovering logic), the first energyrecovering/adiabatic logic family is presented for biomedical applications, which functions using the scheme multiple-phase sinusoidal clocking. Moreover, a system of SCAL, a source-coupled variation with TMEL having enhanced energy efficiency and supply voltage scalability, is introduced. A novel true multi-phase Approach and Source-coupled adiabatic logic for energy effective communication system is proposed. The adiabatic logic is employed for both write and read side operation. The CMOS inverter is integrated with TMEL cascades, which in turn reduces leakage loss. In SCAL, the optimal performance at any operating circumstance is attained byan adjustable current source in each gate. SCAL, and TMEL, are capable of outperforming existing adiabatic logic families concerning operating speed and energy efficiency. The performance analysis was carried and simulated through 45 nm CMOS inverter in terms of leakage power, delay, and power consumption. In particular, for the clock rates that range from 10 MHz to 200 MHz, the proposed SCAL was more energy-efficient and less dissipative on comparing their pipelined or purely combinational CMOS counterparts. In biomedical equipment, the system may be included into the low-power design since it is energy efficient and very robust. Improvements in VLSI technology, such as increased dynamic range, low-voltage EEPROMs (electrically eraseable programmable ROMs), and specific sensor techniques, are also expected to contribute to advancements in implanted medical devices in the near future.

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