scholarly journals Design and Experimental Analysis of Charge Recovery for Piezoelectric Fan

Actuators ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 20
Author(s):  
Zhenwei Chen ◽  
Wei Tang ◽  
Ze Li ◽  
Jiaqi Lan
Keyword(s):  
Energy Saving ◽  
Heat Dissipation ◽  
Supply Voltage ◽  
High Reliability ◽  
Saving Rate ◽  
Recovery Method ◽  
Charge Recovery ◽  
Save Energy ◽  
Driving Circuit ◽  
Good Heat

The piezoelectric (PE) fan is widely adopted in the field of microelectronics cooling due to its advantages of high reliability and good heat dissipation characteristics. However, PE fans driven by conventional circuits suffer from plenty of energy loss. To save energy, we propose an inductor-based charge recovery method and apply it to the driving circuit for the PE fan. Two inductor-based driving circuits, a single inductor-based driving (SID) circuit and a double inductor-based driving (DID) circuit are compared. The SID circuit has a simple structure and a slightly higher energy-saving rate, while the DID circuit introduces no additional oscillations and is more stable. The experimental results show that when the supply voltage changes, both circuits have a relatively stable energy-saving rate, which is about 30% for the SID circuit and 28% for the DID circuit. Moreover, the proposed circuits enjoy the same driving capacity as the conventional circuit, and the driven fan has the same cooling performance.

scholarly journals Energy analysis and conservation opportunities in spray dryers

2018 ◽  
Author(s):  
Mukund Haribahu Bade ◽  
Sanjay Kumar Patel
Keyword(s):  
Energy Saving ◽  
Heat Recovery ◽  
Energy Analysis ◽  
Raw Materials ◽  
Energy Requirement ◽  
Pinch Analysis ◽  
Spray Dryer ◽  
Recovery Method ◽  
Energy Maximum ◽  
Save Energy

Dryers are used for removal of moisture from an raw materials (such as effluent) to form a dried solids as per the requirements. For removal of the moisture, energy requirement is huge. Therefore, in this paper, methodology for heat recovery in one of the type of dryers as spray dryers is developed, which is simple and easy to apply. The proposed methodology is illustrated with the help of an example taken from literature. It is observed that the indirect heat recovery method could save energy maximum up to 82 % as compared to literature and 41 % higher than without heat recovery. Keywords: Spray dryer, pinch analysis, heat recovery, effluent drying, energy saving

Comfort and Energy-Saving Intelligent Shutter

2011 ◽  
Vol 267 ◽  
pp. 565-568
Author(s):  
Su Chen ◽  
Dong Xing Wang
Keyword(s):  
Energy Saving ◽  
Temperature Sensors ◽  
Sleep Mode ◽  
Indoor Temperature ◽  
Current Season ◽  
Solar Battery ◽  
Remote Controller ◽  
Save Energy

Most currently used shutters are manually operated. The design of an intelligent shutter has been proposed. The intelligent shutter can be powered by a solar battery. Photosensitive resistors have been used to determine if it is in daytime or nighttime, if it is sunny or not, and if the light is turned on or turned off. Digital temperature sensors have been used to detect the indoor temperature and the outside temperature. They are also used to determine the current season. The intelligent shutter is automatically controlled according to the above information. It is turned off at night and is set in sleep mode to save energy. It is turned on partially on sunny day in summer. In rainy day, the shutter is turned off while the indoor light is on. The intelligent shutter can also be controlled using a wireless remote controller, which makes it very friendly. It is comfort and energy-saving using the intelligent shutter. Experiments have demonstrated the applicability of the design.

RESOURCE SAVING WHEN IMPLEMENTING MEASURES TO OPTIMIZE LIGHTING IN POULTRY FACTORIES

2021 ◽  
Author(s):  
Ирина Владимировна Агафонова
Keyword(s):  
Energy Saving ◽  
Energy Resources ◽  
Resource Saving ◽  
Poultry Farms ◽  
Lighting Systems ◽  
Save Energy

Статья посвящена значению энергосбережения в системах освещения на птицефабриках. В статье предлагается при оснащении птицеводческих хозяйств осветительными приборами использовать преимущественно энергосберегающие лампы. Также внимание следует уделить режимам освещения, спектру света, оптимизация которых также поможет сэкономить энергетические ресурсы. The article is devoted to the importance of energy saving in lighting systems in poultry farms. The article proposes to use mainly energy-saving lamps when equipping poultry farms with lighting devices. Also, attention should be paid to lighting modes, the spectrum of light, the optimization of which will also help save energy resources.

scholarly journals A Study on Energy-Saving Technologies Optimization towards Nearly Zero Energy Educational Buildings in Four Major Climatic Regions of China

Energies ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4734 ◽  
Author(s):  
Jing Zhao ◽  
Yahui Du
Keyword(s):  
Energy Efficiency ◽  
Total Energy ◽  
Energy Saving ◽  
High Energy ◽  
National Standards ◽  
Saving Rate ◽  
Zero Energy ◽  
Cold Regions ◽  
Climatic Regions ◽  
Educational Buildings

An educational building is a kind of public building with a high density of occupants and high energy consumption. Energy-saving technology utilization is an effective measure to achieve high-performance buildings. However, numerous studies are greatly limited to practical application due to their strong regional pertinence and technical simplicity. This paper aims to further optimize various commonly used technologies on the basis of the current national standards, and to individually establish four recommended technology selection systems corresponding to four major climatic regions for realizing nearly zero energy educational buildings (nZEEBs) in China. An educational building was selected as the case study. An evaluation index of energy-saving contribution rate (ECR) was proposed for measuring the energy efficiency of each technology. Thereafter, high energy efficiency technologies were selected and implemented together in the four basic cases representing different climatic regions. The results showed that the total energy-saving rate in severe cold regions increased by 70.74% compared with current national standards, and about 60% of the total energy-saving rate can be improved in cold regions. However, to realize nZEEBs in hot summer and cold winter regions as well as in hot summer and warm winter regions, photovoltaic (PV) technology needs to be further supplemented.

Energy Saving Benefit Evaluation of Zone and Time Control Heating for One College

2014 ◽  
Vol 508 ◽  
pp. 227-230
Author(s):  
Ting Ting Liu
Keyword(s):  
Cost Saving ◽  
Energy Saving ◽  
Current Situation ◽  
Saving Rate ◽  
Heating Systems ◽  
Time Control ◽  
Benefit Evaluation ◽  
Indoor Comfort

In consideration of the current situation that college buildings are still heated as normal without occupancy,causing energy waste,the on-duty heating will be adopted in college buildings without occupancy under the premise to ensure the indoor comfort requirements.In the case of one college, the energy saving rate and cost saving rate were evaluated for college buildings that used zone and time control heating systems for buildings of different functions.The results show that the annual heating energy saving rate is 34.5%,and the annual heating cost saving rate is 51.5%. In similar collage buildings, 5.48kg of standard coal and 14.43Yuan per square meter of structure area can be saved per year if using zone and time control heating.

Effect of same Insulation Materials on Energy-Saving Potential of Different Buildings

2012 ◽  
Vol 164 ◽  
pp. 93-96 ◽  
Author(s):  
Chang Guo ◽  
Jian Yao
Keyword(s):  
Total Energy ◽  
Energy Saving ◽  
Energy Simulation ◽  
Simulation Program ◽  
Saving Rate ◽  
Shape Coefficient ◽  
Insulation Materials ◽  
Energy Saving Potential ◽  
Building Shape

This paper analyzed the effect of same insulation materials on energy-saving potential of three different buildings by using the energy simulation program DOE-2. The results show that the heating energy saving rate of the building decreases when the building shape coefficient increases, while cooling energy saving rate of the building rises and the total energy saving rate of the buildings will reduce.

scholarly journals Effectiveness of Cooperative Learning (Theme: Limited Natural Resources) to Increase Intention to Save Energy in Students

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
Sugeng Hariyadi ◽  
Nuke Martiarini ◽  
Anna Undarwati
Keyword(s):  
Cooperative Learning ◽  
Natural Resources ◽  
Energy Saving ◽  
Group Process ◽  
Control Group ◽  
Behavior Intention ◽  
High Category ◽  
Saving Behavior ◽  
Save Energy ◽  
Experimental Group

Some of the natural disaster occurred caused by people using natural resources unwisely. Before analyzing about that behavior, first will be analyzed is behavioral intention. The purpose of this study was to determine the effectiveness of cooperative learning group investigation type with the theme of “limited natural resources” to improve intention to save energy. The study used an experimental design Post-test-Only Design With Equivalent Groups, involving 66 people, divided into two groups, each 33 in the experimental group and 33 control group. Process experiments were conducted in a way, dividing the experimental group in 5 small groups, having given the matter of limited natural resources, then each group discussion, and sharing ideas with other groups in the jigsaw. The results showed that there are differences in energy-saving behavior intention significantly between the experimental group (KE) and the control group (KK) with t value of 3.192 with 0.002 significance (p <0.05). Differences KE and KK with a positive t value indicates that the energy-saving behavior intention at KE has a higher value than the families who were not given the manipulation. In general score KE and KK if joined at the high category, but if sorted, KE scores at the high category and score KK in middle category.

scholarly journals Heat recovery by means of a ventilation unit

2021 ◽  
Vol 263 ◽  
pp. 04025
Author(s):  
Dmitrii Khlopitsyn ◽  
Andrey Rymarov
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Heat Recovery ◽  
New Technologies ◽  
Ventilation System ◽  
New Developments ◽  
Before And After ◽  
Save Energy ◽  
Recuperative Heat Exchanger ◽  
Air Removal

Energy consumption all over the world is constantly growing. To save energy, new technologies are being developed for the efficient use of energy resources. The goal of all new developments is to use less energy to provide the same level of energy supply for technological processes or buildings. The problem of energy saving is relevant for the ventilation system. Together with the removed air, a large amount of heat is lost, which is not advisable. In order to avoid these losses, heat recuperators began to be used, heating the cold supply air due to the warm air removed from the room. This development belongs to the field of energy saving. The goal is to increase efficiency by reheating the air after the heater with the help of a recuperator for a given temperature difference in the supply air before and after the recuperative heat exchanger. The development is a design of a ventilation unit with air removal and supply air ducts, combined into one housing with a separate, according to the “screw” principle, heat transfer wall, for use in the ventilation system in order to ensure an optimal microclimate in the room. Thus, as a result of using the presented device, the efficiency of the room ventilation unit is increased by reducing the energy consumption for heating the supply air with a heater.

Understanding intentions to reduce energy consumption at the workplace by the employees: case of a developing country

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Amna Akhound ◽  
Aseem Majeed Rizvi ◽  
Waqar Ahmed ◽  
Muhammad Nadeem Khan
Keyword(s):  
Energy Saving ◽  
Structural Equation ◽  
Energy Use ◽  
Energy Savings ◽  
Theoretical Research ◽  
Equation Modeling ◽  
Survey Method ◽  
Content Type ◽  
Saving Behavior ◽  
Save Energy

PurposeEnergy-saving behavior of individuals is essential to minimize energy use and reduce the emission of toxic gases. This study's actual focus is to find out the determinants of the energy-saving behavior of individuals in the workplace.Design/methodology/approachAs a theoretical research model, the extended theory of planned behavior (TPB) has been used to analyze the determinants of energy-saving intentions. A survey method is used to collect 289 valid data, and structural equation modeling (SEM) is used to analyze the data.FindingsThe final result shows that the variables attitude at home, subjective norm (SN) and descriptive norms positively impact intention to save energy at the workplace. In contrast, the construct attitude and perceived behavior control is insignificant in this research. On the other hand, the personal moral norm (PMN) is a powerful predictor of individual energy-saving intentions at the workplace.Originality/valueThis research provides insights that will help the organizations understand the behavior of individuals at the workplace for energy-saving intentions to formulate such policies that will enhance individuals' practice for energy savings.

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